CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Xiangwei Zou,Bo Sun,Liang Wang,Hongcun Bai,Xiangchao Meng,Chunhu Li,Zizhen Li
Designing low-cost and efficient photocatalysts for the degradation of antibiotic contaminants in water is crucial for environmental remediation. In this study, we synthesized SnS 2 /Bi 2 MoO 6-x composites with a synergistic modulation of oxygen vacancies (OVs) and a Z-scheme charge transfer mechanism using a simple hydrothermal method. The synthesized composites, designated as SBMO-5, were used for the photocatalytic degradation of tetracycline (TC). Notably, SBMO-5 exhibited the highest reaction rate constant (0.01385 min −1 ), surpassing pristine SnS 2 (0.00129 min −1 ) and Bi 2 MoO 6 (0.00312 min −1 ) by 10.7 and 4.4 times, respectively. The enhanced photocatalytic degradation performance can be ascribed to the synergistic effect of the Z-scheme electron transfer mechanism and OVs. The unique Z-scheme electron transfer channel both accelerated the separation of photogenerated charge carriers and exploited the strongest oxidation and reduction capabilities within the constituent materials. Furthermore, the low-cost and readily available OVs modification enhanced absorption of visible light. Additionally, we investigated the influence of various experimental conditions on the degradation efficiency of SBMO-5, predicted the degradation pathways of TC , and evaluated the toxicity of the intermediates. Overall, this study provides insights into the application of efficient catalysts for pollutant degradation under a multi-electric field modulation strategy.
研究领域:
环境科学
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材料科学
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化学工程
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光化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Ning Qi,Yuexin Yi,Yacen Tang,Xingyan Liu,Yating Yuan,Ziping He,Xintong Shi,Yuyu Fang,Youzhou He,Siping Wei
Photocatalytic removal of tetracycline (TC) from wastewater is an advantageous method with green and efficient potentials, while the low light utilization and severe charge carrier recombination of conventional photocatalysts limit their practical application. The TiO 2 /Ti 3 C 2 derived from in-situ partly oxidation of Ti 3 C 2 MXene precursors on which Bi 2 MoO 6 (BMO) was tightly loaded was synthesized via a facile hydrothermal synthesis route. The introducing TiO 2 /Ti 3 C 2 accelerated the transfer of electrons, improving the efficiency of electron-hole separation, thus strengthened the photocatalytic performance. Under optimum conditions, the BMO/TiO 2 /Ti 3 C 2 composite significantly removed 87.54 % TC from wastewater within 150 min, which was higher than the original counterparts and remained almost unchanged after four cycles. The active species trapping experiments and ESR analysis displayed that •O 2 - played a dominant role in TC degradation. The possible degradation pathways were also deduced through liquid chromatography-mass spectrometry (LC-MS) analysis experiments, demonstrating that the terminal products of degradation were mainly CO 2 and H 2 O, confirming the potential of BMO/TiO 2 /Ti 3 C 2 photocatalyst for the environmentally friendly treatment of antibiotic pollutants in wastewater.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
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2016
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IF 7.354
Bao Zhang,Jun Li,Yuying Gao,Ruifeng Chong,Zhiliang Wang,Lin Guo,Xianwen Zhang,Can Li
Photocatalytic oxidation reactions provide a promising strategy for green synthesis of fine chemicals. However, the low photocatalytic efficiency and selectivity are the main obstacles. Herein, we report the ultrathin Bi 2 MoO 6 nanoplates with thickness of ∼17 nm which exhibit a superior performance in alcohol oxidation to corresponding aldehyde using O 2 under visible light irradiation, achieving ca. 29 times enhancement of activity compared with Bi 2 MoO 6 synthesized from traditional hydrothermal method (thickness of ∼250 nm). When Pt nanoparticles as cocatalyst are loaded on the surface of the ultrathin Bi 2 MoO 6 nanoplates, the photocatalytic performance is further enhanced. The remarkable enhancement of activity is attributed to the ultrathin 2D geometry of Bi 2 MoO 6 nanoplates, promoting the charge-separation efficiency and affording abundant catalytically active sites. The excellent selectivity of photocatalytic oxidation of benzyl alcohol on the ultrathin Bi 2 MoO 6 is attributed to the different adsorption behaviors of benzyl alcohol and benzaldehyde. This study could also provide an efficient strategy for improving the photocatalytic performance by rational fabrication of two-dimensional semiconductor materials for organic synthesis.
研究领域:
材料科学
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化学工程
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催化
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纳米技术
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Mengying Xu,Pier-Luc Tremblay,Muhammad Babur Joya,Abanchime Zenaba Hadja Kaka,Emmanuel Seneway Kollah,Blessings Kapungwe Mwansa,Wenhao Wang,Yang Liu,Xiaolin Xing,Feijun Qiu,Tian Zhang
Humic acids (HAs) in water react with chlorine disinfectants and form carcinogenic chemicals. These molecules also inhibit environmental engineering processes aiming at the removal of toxic metals and organic contaminants from wastewater. For these reasons, low-cost adsorption strategies are being developed to take out HAs from water. Here, the metal oxide Bi 2 MoO 6 with either exposed [001] (BMO-001-Br) or [010] (BMO-010-Br) facets prepared with the cetyltrimethylammonium bromide (CTAB) surfactant was evaluated for the adsorption of HAs. With a maximal adsorption capacity for HAs of 63.1 mg/g, BMO-001-Br nanosheets constituted a superior adsorbent capable of removing contaminants over a large pH range. BMO-001-Br was reusable and could separate HAs from multiple solutions including tap water, synthetic wastewater, and real pharmaceutical wastewater. The adsorption capacity of BMO-001-Br can be explained by its suitable specific surface area and its positive surface charge related to the presence of CTAB molecules attracting negatively charged HA molecules. A third feature of BMO-001-Br involved in HAs removal is a high abundance of oxygen vacancies, which are easier to form on a BMO surface with exposed crystal [001] facets. The notable performance of BMO-001-Br indicates that it can serve efficiently for the extraction of HAs from different aqueous solutions.
研究领域:
环境工程
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水处理
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材料科学
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产品关联
DOI
高影响因子
Nano Materials Science
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2025
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IF 17.9
Hongjing Liu,Shan Ren,Xiaodi Li,Liang Wang,Bofeng Bai,Shouning Chai,Peng Chen,Fan Dong
Photocatalytic oxidation of nitrogen oxides (NO x ) is a promising technology for environmental protection and green sustainable development. However, its practical application remains limited due to inefficient activation of NO and O 2 , stemming from inadequate structural design of photocatalysts. Herein, we developed a thin-layer two-dimensional (2D) material Bi 2 MoO 6 (BMO) via cetyl trimethyl ammonium chloride (CTAC) addition in synthesis process, which effectively modulates the surface electronic structure, enhance the light absorption and activation of NO and O 2 . This thin-layer Bi 2 MoO 6 nanosheets achieved a NO oxidation efficiency of 45.3 %, which was about 5.5 times that of traditional bulk BMO (8.2 %). Additionally, it demonstrated superior selectivity for NO 2 − /NO 3 − production (86.6 %) compared to bulk BMO (60.5 %) and significantly reduced the formation of toxic NO 2 byproducts (13.4 % vs. 39.5 %). Combining experimental characterizations and density functional theory (DFT) simulations, it demonstrated that the electron-hole pair separation could be promoted and targeted adsorption activation of O 2 can be enhanced to form superoxide radicals (•O 2 − ) and singlet oxygen ( 1 O 2 ) via the effect of surface charge transfer adjustment on the thin-layer structure of Bi 2 MoO 6 , which are key factors affecting the efficiency and selectivity of photocatalytic oxidation of NO. This work provides important insights into the formation of directed ROS and proposes a unique mechanism for selective NO oxidation.
研究领域:
环境科学
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材料科学
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光催化
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化学工程
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理论化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Yuqing Lu,Chunsheng Ding,Jun Guo,Wei Gan,Peng Chen,Miao Zhang,Zhaoqi Sun
There is a high demand for photocatalysts that can efficiently degrade antibiotics; however, there are challenges in technological development related to charge transfer and light capture ability. In this study, ternary Bi 2 MoO 6 /GQDs/TiO 2 (denoted as BGT; GQDs refer to graphene quantum dots) heterojunction photocatalysts with high ciprofloxacin (CIP) photodegradation efficiency were successfully prepared. BGT with a 0.20 mL GQD dispersion solution (BGT-2) exhibited the highest CIP photodegradation efficiency (90.21 %). The rate constant of BGT-2 was 15.49 × 10 −3 min −1 , which was 4.01, 4.16, and 9.22 times higher than those of Bi 2 MoO 6 /TiO 2 (3.86 × 10 −3 min −1 ), Bi 2 MoO 6 (3.72 × 10 −3 min −1 ), and TiO 2 (1.68 × 10 −3 min −1 ), respectively. The degradation efficiencies of amoxicillin and tetracycline hydrochloride were 78.98 % and 92.49 %, respectively. The effects of pH values, water sources, and inorganic anions on CIP degradation were systematically explored. In addition, three environmentally friendly degradation pathways were proposed based on liquid chromatography-mass spectrometry (LC-MS) results and the toxicity evaluation of the various intermediates. Testing the optical and electrochemical properties of the catalysts showed that the synthesized dual Z-scheme heterojunctions can significantly improve the light capture ability and reduce the photogenerated electron-hole recombination rate, effectively addressing the challenges encountered with the use of photocatalysts.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
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IF 6.182
Huiyong Li,Zemin Zheng,Mofan Liu,Hao Jiang,Dafeng Hu,Xudong Zhang,Lei Xia,Xuemin Geng,Jiangwei Lu,Xinran Cheng,Yanfen Wan,Peng Yang
A novel Pd nano-skeleton (Pd NSs) modified Bi 2 MoO 6 balls photocatalyst was prepared by a facile hydrothermal treatment. The characterization by multiple techniques demonstrated the excellent light absorption and effective photo-generated electron-hole pairs separation performance of the composite catalyst, which further proved its superior photocatalytic property. Compared to the pure Bi 2 MoO 6 nanosheets, carbon quantum dots (CQDs) modified Bi 2 MoO 6 balls and Pd nanoparticles (Pd NPs) modified Bi 2 MoO 6 balls catalysts, 1.3% Pd NSs@Bi 2 MoO 6 sample exhibited the optimal catalytic performance for removing methyl orange (MO), methylene blue (MB), K 2 Cr 2 O 7 , phenol and the simulated wastewater mixture formed by the first three above under the illumination of visible light. Above all, the degradation efficiency increased about 5 times that of the pure Bi 2 MoO 6 balls for the degradation of MO. This great improvement was mainly attributed to Pd NSs with many contact edges, which provided more active sites for the adsorption reaction of organic dye molecules, following its better near-infrared light absorption capacity in the catalytic system. The active species mainly involved in the reaction were verified by ESR technique and the trapping test, mainly involving O 2 − , holes, OH, etc., and a possible photocatalytic reaction mechanism and pollutant degradation pathway were also proposed.
研究领域:
环境科学
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化学
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材料科学
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水处理
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Xingping Fu,Qianqian Chen,Ye Zhang,Feng Yu,Junjie Pan,Xiaobing Yang
The overuse of antibiotics, coupled with inadequate wastewater treatment, has led to widespread environmental contamination, posing significant risks to ecosystems and public health. In this study, a novel BiOCl/Bi 2 MoO 6 /MIL-125(Ti) heterojunction catalyst featuring a Z -scheme and II-type dual-functional junctions was prepared via a two-step solvothermal method and employed for the degradation of tetracycline (TC). The synthesized samples were thoroughly characterized by XRD, SEM, BET, TEM, and UV–vis spectroscopy. The results indicate that the incorporation of BiOCl and Bi 2 MoO 6 effectively tunes the band structure of MIL-125(Ti), enhancing its visible-light absorption. Moreover, the formation of the heterojunction interfaces significantly suppresses recombination of photogenerated charge carriers, thereby improving photocatalytic performance. Under visible-light irradiation, the BiOCl/Bi 2 MoO 6 /MIL-125(Ti) catalyst generates reactive radicals (·OH and ·O₂ − ), enabling efficient degradation of TC with a removal efficiency of 95.71 %. The synergistic effect of the Z -scheme and II-type heterojunctions plays a crucial role in the efficient photocatalytic degradation of TC. This study provides new insights into the degradation mechanisms of bifunctional heterojunctions and presents a promising strategy for designing high-performance photocatalysts for tetracycline degradation.
研究领域:
环境科学
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材料化学
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光催化
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环境污染治理
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纳米材料
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药物降解
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半导体异质结
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产品关联
DOI
高影响因子
Materials Today Nano
·
2022
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IF 13.364
X. Cui,Y. Zhou,Y. Zheng,L. Cao,L. Gao,J. Duan,H. Yin,S. Ai
N 6 -methyladenosine (m 6 A) is the most abundant and dynamic reversible modification of mRNA in eukaryotes discovered in the mid-1970s, which is widely involved in various physiological processes. Fat mass and obesity-associated protein (FTO protein) is not only a demethylase for m 6 A, but also a carcinogenic factor for many human cancers. Therefore, it is very important to build a simple and sensitive platform for simultaneous detection of m 6 A and FTO protein. To achieve this aim, a novel photoelectrochemical biosensor was constructed with the antibody-free detection strategy of DTT mediated –SH functionalization of m 6 A triggered by FTO protein catalyzed m 6 A oxidation . To achieve high detection sensitivity, CdS/Bi 2 MoO 6 /MoSe 2 system with matched energy gap was employed as photoactive material. To achieve high detection selectivity , the –CH 3 of m 6 A in the captured RNA sequence (m 6 A RNA) on the electrode surface was oxidized by FTO protein to form hydroxymethyl, followed with the covalent reaction of DTT with hydroxymethyl, making the labeling of m 6 A with –SH. Finally, a CdS nanoparticle was modified on the electrode through the specific covalent reaction between –SH and Cd, achieving the improvement of the photocurrent with the matched energy band . Under the optimal experimental conditions, the biosensor showed linear range from 0.001 to 50 nM and 0.0005–500 μg/L with the detection limit of 0.37 pM and 0.034 ng/L (S/N = 3) for m 6 A RNA and FTO protein, respectively. The applicability of the developed method was assessed by investigating the effect of entacapone on FTO protein activity.
研究领域:
生物化学
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分析化学
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生物技术
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癌症研究
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
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2024
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IF 6.7
Miao Zhang,Haowei Zhang,Yunlei Zhou,Huanshun Yin,Zhengkun Yu,Xinyue Zhang,Shiyun Ai,Minghui Wang
The OPECT biosensing platform, which connects optoelectronics and biological systems, offers significant amplification and more possibilities for research in biological applications. In this work, a homogeneous organic photoelectrochemical transistor (OPECT) biosensor based on a Bi2S3/Bi2MoO6 heterojunction was constructed to detect METTL3/METTL14 protein activity. The METTL3/METTL14 complex enzyme was used to catalyze adenine (A) on an RNA strand to m6A, protecting m6A-RNA from being cleaved by an E. coli toxin (MazF). Alkaline phosphatase (ALP) catalyzed the conversion of Na3SPO3 to H2S through an enzymatic reaction. Due to the adoption of the strategy of no fixation on the electrode, the generated H2S was easy to diffuse to the surface of the ITO electrode. The Bi2S3/Bi2MoO6 heterojunction was formed in situ through a chemical replacement reaction with Bi2MoO6, improving photoelectric conversion efficiency and realizing signal amplification. Based on this “signal on” mode, METTL3/METTL14 exhibited a wide linear range (0.00001–25 ng/μL) between protein concentration and photocurrent intensity with a limit of detection (LOD) of 7.8 fg/μL under optimal experimental conditions. The applicability of the developed method was evaluated by investigating the effect of four plasticizers on the activity of the METTL3/METTL14 protein, and the molecular modeling technique was employed to investigate the interaction between plasticizers and the protein.
研究领域:
生物化学
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生物传感器
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光电化学
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蛋白质活性检测
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2024
·Vol. 25
·期 8
·4418
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IF 4.9
Liang Hao,Jingfei Luan
A novel photocatalytic nanomaterial, Ho2YSbO7, was successfully synthesized for the first time using the solvothermal synthesis technique. In addition, a Ho2YSbO7/Bi2MoO6heterojunction photocatalyst (HBHP) was prepared via the hydrothermal fabrication technique. Extensive characterizations of the synthesized samples were conducted using various instruments, such as an X-ray diffractometer, a Fourier transform infrared spectrometer, a Raman spectrometer, a UV-visible spectrophotometer, an X-ray photoelectron spectrometer, and a transmission electron microscope, as well as X-ray energy dispersive spectroscopy, photoluminescence spectroscopy, a photocurrent test, electrochemical impedance spectroscopy, ultraviolet photoelectron spectroscopy, and electron paramagnetic resonance. The photocatalytic activity of the HBHP was evaluated for the degradation of diuron (DRN) and the mineralization of total organic carbon (TOC) under visible light exposure for 152 min. Remarkable removal efficiencies were achieved, with 99.78% for DRN and 97.19% for TOC. Comparative analysis demonstrated that the HBHP exhibited markedly higher removal efficiencies for DRN compared to Ho2YSbO7, Bi2MoO6, or N-doped TiO2photocatalyst, with removal efficiencies 1.13 times, 1.21 times, or 2.95 times higher, respectively. Similarly, the HBHP demonstrated significantly higher removal efficiencies for TOC compared to Ho2YSbO7, Bi2MoO6, or N-doped TiO2photocatalyst, with removal efficiencies 1.17 times, 1.25 times, or 3.39 times higher, respectively. Furthermore, the HBHP demonstrated excellent stability and reusability. The mechanisms which could enhance the photocatalytic activity remarkably and the involvement of the major active species were comprehensively discussed, with superoxide radicals identified as the primary active species, followed by hydroxyl radicals and holes. The results of this study contribute to the advancement of efficient heterostructural materials and offer valuable insights into the development of sustainable remediation strategies for addressing DRN contamination.
研究领域:
材料科学
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环境科学
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化学
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光催化
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水处理
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2020
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IF 8.758
Yoann de Rancourt de Mimérand,Kun Li,Cong Zhou,Xiaoyun Jin,Xiaoxian Hu,Yufei Chen,Jia Guo
Inorganic photocatalysts became an essential and powerful tool for the remediation of polluted water. However, important limitations of photocatalysts in their colloidal form, especially nanosized, remain. For instance, their separation from water after use and recovery, which can be particularly demanding, time- and energy-wise. Considering such aspects, supported catalysts bear significant advantages. However, efforts still have to be made to develop processes that allow the permanent and efficient immobilization of inorganic photocatalysts in sustainable conditions, in order to maintain the advantages of supported catalysts over colloidal ones. Herein, we report the use of an aqueous-phase plasma-aided grafting (APPAG) process to produce functional and efficient hybrid photocatalysts. More specifically, based on cold plasma discharge (CPD), ZnO/Bi2MoO6 heterojunctions were permanently immobilized on polymer supports generated by 3D-printing, with fractal-inspired designs. Three different approaches of the APPAG process have been successfully used for the immobilization of the inorganic phase, that is core–shell-assisted direct grafting, indirect grafting and in situ complexation-assisted precipitation (ISCAP). Noticeably, the latter technique has never been reported before to our knowledge. These three immobilization routes rely on different strategies and yield to distinct morphological specificities, but all allow using mild synthesis conditions and producing stable, active, permanently immobilized coatings of photocatalysts. Regarding the preparation of the organic supports, two sorts of additive manufacturing (AM) technologies were employed, namely fused-deposition modeling (FDM) and liquid crystal diode (LCD)-based SLA (stereolithography). The use of fractal geometries combined with AM permits the production of supports with relatively high surface areas, in a single processing step. Overall, the three plasma-based immobilization methods revealed to be efficient and the performance of the different hybrid photocatalysts have later been assessed through the photodegradation of Rhodamine B dye under simulated sunlight irradiation and visible light only, with promising results.
研究领域:
环境科学
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材料科学
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化学工程
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等离子体技术
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增材制造
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）