MICROPOROUS AND MESOPOROUS MATERIALS
·
2023
·
IF 5.2
Yunlong Li,Miao Liu,Yixian Liu,Lilong Zhou,Jilong Han,Zhengjie Li,Jimmy Yun,Runjing Liu
Two kinds of Ce-doped UiO-66 were synthesized by using CeCl 3 ·7H 2 O and (NH 4 ) 2 Ce(NO 3 ) 6 as cerium precursors, namely Ce(III)- and Ce(IV)-UiO-66. The effect of valence states of cerium precursors on adsorption performance towards Rhodamine B (RhB) was investigated for the first time. Ce atoms are in two valence states of +3 and + 4, where Ce 3+ ions turn their surfaces negatively charged. The higher cerium content (24.8%) and ratio of Ce 3+ /Ce 4+ ions (1.4:1) of Ce(IV)-UiO-66 made its surface more negatively charged, which is contributed to form stronger electrostatic interaction with cationic dyes. The adsorption amounts of RhB were 239.5 mg/g and 431.7 mg/g for Ce(III)- and Ce(IV)-UiO-66, which are 2.38 and 5.11 times higher than pristine UiO-66, respectively. The well-fit Langmuir model and pseudo-second-order model suggest a monolayer chemisorption process. The adsorption mechanism suggests that the electrostatic interaction and the complexation interaction between Ce 3+ and RhB are dominant factors affecting RhB adsorption. Since Ce 3+ severed as adsorption sites, the higher Ce content and stronger electrostatic interaction of Ce(IV)-UiO-66 together promoted its RhB adsorption than Ce(III)-UiO-66. The obtained results help to understand how the mixed-valences of incorporated metals affect the adsorption behaviors of bimetallic MOFs deeply.
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高影响因子
FOOD CONTROL
·
2021
·
IF 5.548
Lin Zhu,Xiu-Xiu Dong,Chun-Bin Gao,Zuoqi Gai,Yong-Xin He,Zhen-Jie Qian,Yingju Liu,Hong-Tao Lei,Yuan-Ming Sun,Zhen-Lin Xu
Here, a highly sensitive and selective electrochemical immunosensor was established for the rapid screening of Rhodamine B (Rh B) in paprika and capsicol. Rh B complete antigen was prepared and used as immunogen to obtain anti-Rh B monoclonal antibody (anti-Rh B-mAb) through cell fusion technology. A layer of cobalt hydroxide and gold nanoparticles composite material (Co(OH) 2 –Au NPs) was modified on the surface of screen-printed electrode (SPE) by one-step electrodeposition. Subsequently, Rh B antigen was coated on the modified SPE as coating antigen, then Rh B and anti-Rh B-mAb labeled with cerium oxide (anti-Rh B-mAb@CeO 2 ) were overlay simultaneously. Rh B can compete with the Rh B coating antigen to combine the anti-Rh B-mAb which causing electrical signal changes. After optimization of the assembled immunosensor, the assay showed a linear range when the concentration of Rh B ranged from 0.01 ng/mL to 10000 ng/mL. The average recovery rate of spiked samples was 85.7%∼106.8%, which was in good accordance with the standard HPLC determination. The immunosensor behaves high sensitivity and selectivity, and can be used in the rapid screening of Rh B in paprika and capsicol.
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Muhammad Ishfaq,Safyan Akram Khan,Muhammad Altaf Nazir,Shahid Ali,Muhammad Younas,Muhammad Mansha,Syed Shoaib Ahmad Shah,Muhammad Arshad,Aziz ur Rehman
Zirconium-fumaric based metal organic framework (MOF-801) was synthesised by ultra-sonication method. After synthesis, powder X-ray diffraction (PXRD), UV/Vis spectrophotometer and Fourier transform infrared (FT-IR), were used for its functional group identification. For its structural morphology and elemental composition scanning electron microscopic (SEM) and energy dispersive scanning (EDS) analysis was carried out. After typical characterization, photocatalytic degradation of Rhodamine B (Rh-B) was examined under sunlight by using Zr-fumaric MOF-801 as photocatalyst and revealed the satisfactory results. The MnO 2 @MOF-801 and MnO 2 @MOF-801/Chitosan composite were also synthesized with same ultrasonication method. It was concluded from this study that MnO 2 @MOF-801/Chitosan composite has the good photocatalytic activity about 95 % against the Rhodamine B (Rh-B) in contrast with Zr-fumaric MOF-801 (71 %) and MnO 2 @MOF-801 (86 %) after 45 min of reaction. Valence band (VB) gap and conduction band (CB) corresponding to light-induced transition are used to suggest catalytic mechanism. This newly synthesized non-reported MnO 2 @MOF-801/Chitosan composite as a good photocatalyst initiate the new way for the development of others non-reported MOF coated biopolymer with enhanced photocatalyst activity as an environmental remediation for the control of water pollution.
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 14
·2394
·
IF 5.719
Xingang Chen,Lei Zhu,Zhipeng Ma,Meilin Wang,Rui Zhao,Yueyue Zou,Yijie Fan
Industrial wastewater containing large amounts of organic pollutants is a severe threat to the environment and human health. Thus, the rapid detection and removal of these pollutants from wastewater are essential to protect public health and the ecological environment. In this study, a multifunctional and reusable surface-enhanced Raman scattering (SERS) substrate by growing Ag nanoparticles (NPs) on ZnO nanorods (NRs) was produced for detecting and degrading Rhodamine B (RhB) dye. The ZnO/Ag substrate exhibited excellent sensitivity, and the limit of detection (LOD) for RhB was as low as 10−11M. Furthermore, the SERS substrate could efficiently degrade RhB, with a degradation efficiency of nearly 100% within 150 min. Moreover, it retained good SERS activity after multiple repeated uses. The interaction between Ag NPs, ZnO, and RhB was further investigated, and the mechanism of SERS and photocatalysis was proposed. The as-prepared ZnO/Ag composite structure could be highly applicable as a multifunctional SERS substrate for the rapid detection and photocatalytic degradation of trace amounts of organic pollutants in water.Keywords:SERS;organic pollutants;ZnO/Ag;sensitivity;photocatalytic
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PubMed
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2026
·
IF 3.3
Ma Yong-hu,Ma Fu,Zhao Tiao-bin,Gao Zi-yi,La Ying-hong,Zhao Hong-jian
Limited interfacial charge separation efficiency and insufficient redox capacity severely hinder the practical application of conventional Bi 2 WO 6 -based photocatalysts. To address these issues, a novel Bi(C 2 O 4 )OH/Bi 2 WO 6 heterojunction was constructed via a facile room-temperature one-pot liquid-phase deposition method. Multiple characterizations confirm the intimate interfacial contact between Bi(C 2 O 4 )OH nanorods and uniformly anchored Bi 2 WO 6 nanoparticles, accompanied by the introduction of abundant oxygen vacancies. On the basis of radical trapping experiments, EPR measurements, and electrochemical tests, an S-scheme charge-transfer model is proposed. This model retains the strong redox potentials of both semiconductors, while oxygen vacancies are speculated to act as efficient interfacial charge-trapping and transfer sites to synergistically promote the migration and separation of photogenerated carriers. The optimized 7%Bi(C 2 O 4 )OH/Bi 2 WO 6 composite achieves an RhB removal efficiency of 97.6% within 60 min for 50 mL of RhB solution (30 mg·L -1 ) under 5-W LED lamp irradiation. Radical trapping and EPR tests confirm that ·O 2 - , h⁺, and ·OH are the dominant active species. This work presents a facile and efficient room-temperature fabrication strategy for Bi-based heterojunctions and systematically elucidates the synergistic promotion mechanism between oxygen vacancies and the proposed S-scheme charge-transfer pathway, offering new insights for designing high-performance photocatalysts for organic wastewater remediation.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Jiapeng Yang,Kai Jia,Shaoyong Lu,Yijun Cao,Grzegorz Boczkaj,Chongqing Wang
In this work, catalytic activity of natural chalcopyrite (CuFeS 2 ) was improved by thermal activation. The modified chalcopyrite was used as efficient catalyst for degradation of organic dye Rhodamine B (RhB) through advanced oxidation process (AOP). Effects of catalyst dosage, H 2 O 2 concentration, reaction temperature, solution pH, anions, and natural organic matter on the degradation efficiency of RhB were investigated. This study revealed that thermal activation at 300 °C changed the chemical valency of surface elements rather than transforming the major chemical phase of natural chalcopyrite. The Fenton-like degradation of RhB was significantly improved by thermally activated chalcopyrite. RhB degradation could be obtained under broad pH and showed high resistance to natural organic matter and anions. Under optimal conditions of H 2 O 2 43.0 mM, catalyst 0.75 g/L, initial pH 5.1, and reaction temperature 25 °C, the degradation of RhB reached 96.7% at 50 min. Based on the rate constant of reaction kinetics, the activation energy for RhB degradation was calculated to be 9 kJ/mol. Radical scavenging experiments and electron paramagnetic resonance (EPR) technique demonstrated that RhB degradation was dominated by the generated hydroxyl radicals in activated chalcopyrite/H 2 O 2 system. The formation of surface sulfates resulted from thermal activation induced the dissolved copper or iron ions, and promoted H 2 O 2 activation and facilitated RhB degradation by reactive hydroxyl radicals. This work provides an in-depth understanding of the mechanism behind thermal activation to enhance the activity of natural chalcopyrite, offering a theoretical basis for utilizing natural minerals for Fenton-like treatment of organic wastewater towards cleaner production.
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DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Jianyun Yang,Xinyue Gu,Liqiong Yang,Minghua Li,Ya Yan,Ye Zhang
Visible-light responsive AgInS 2 (AIS) nanoparticles modified with either pristine multi-walled carbon nanotubes ( p -MWCNTs) or mixed-acid (H 2 SO 4 and HNO 3 ) oxidized multi-walled carbon nanotubes ( o -MWCNTs) were synthesized using a low-temperature liquid phase method. The resulting nanocomposites are denoted as p -MWCNTs/AIS or o -MWCNTs/AIS. The structure, morphology, and optical properties of the samples were characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), high-resolution transmission electron microscopy (HRTEM), photoluminescence spectroscopy (PL), and ultraviolet-visible diffuse reflectance spectroscopy (UV–Vis DRS). The photocatalytic activity of p / o -MWCNTs/AIS towards the degradation of Rhodamine B (RhB) was investigated, and the optimal proportion of p/o -MWCNTs introduced on AIS was determined. A possible degradation mechanism of RhB over p / o -MWCNTs/AIS was proposed. The results demonstrated that p / o -MWCNTs were successfully incorporated into AIS, and the addition of an appropriate amount of p / o -MWCNTs improved the visible-light photocatalytic activity of AIS. Among the samples, 2 % o -MWCNTs/AIS exhibited the highest visible-light catalytic activity , achieving a degradation efficiency of 95 % within 40 min. The·⋅O 2 − species were identified as the main active species during the photocatalytic degradation process . The introduction of o -MWCNTs not only facilitated the separation of photogenerated electron-hole pairs (e − /h + ) in AIS but also enhanced the visible-light absorption of AIS, leading to a significant improvement in its photocatalytic performance. Furthermore, the incorporation of o -MWCNTs greatly enhanced the cycling stability of AIS for reuse.
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JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Cheng Peng,Xinyu Chen,Yu Yang,Feiyang Luo,Xuehui He,Yan Yu,Qiao Deng,Tianding Hu,Shaoyun Shan,Yunfei Zhi,Lihong Jiang,Hongying Su
The development of advanced strategy to activate persulfate for wastewater treatment is an ever-hot research topic. Herein, a high-performance composite catalyst MIL-68(Fe)/CuBi 2 O 4 (30 %) (M-CBO-30) was prepared by in-situ synthesizing MIL-68(Fe) in the CuBi 2 O 4 . The catalytic performances of M-CBO-30 as heterogeneous catalyst to activate PDS for the Rhodamine B (RhB) degradation were systematically studied. It was shown that the M-CBO-30/PDS system presented an ultrahigh RhB degradation efficiency which could remove 100 % RhB within 5 min only using 0.4 g L − 1 catalyst and 0.4 mM PDS. In addition, the M-CBO-30 could remove RhB at a wide pH range (2–10). One should note that the M-CBO-30 exhibited outstanding reusability which afforded high degradation efficiency after 5 successive recycles. And the catalyst structure remained still after being used for 5 catalytic cycles. Heavy metal ions leaching experiment indicated that Cu 2+ leaching concentration of M-CBO-30 was far lower than that of the city water criterion in Europe. The RhB degradation mechanism by M-CBO-30/PDS system was proposed based on the result of electrochemical experiment, radical quenching test, electron paramagnetic resonance and XPS analysis. The RhB degradation was attributed to the oxidization of reactive oxygen species (i.e., SO 4 •− , •OH and 1 O 2 ). The synergistic effect of redox cycle of surface Fe, Bi and Cu were responsible for the high-efficient PDS activation. The excellent recyclability, outstanding structural stability, wide pH application range, less heavy metal leaching and superhigh RhB degradation efficiency highlights the light application prospect of M-CBO-30 in SR-AOPs-driven RhB decontamination.
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高影响因子
MOLECULES
·
2023
·Vol. 28
·期 21
·7310
·
IF 4.6
Yiting Gu,Xin Du,Feng Hua,Jianfeng Wen,Ming Li,Tao Tang
Inorganic halide perovskite CsPbI3is highly promising in the photocatalytic field for its strong absorption of UV and visible light. Among the crystal phases of CsPbI3, the δ-phase as the most aqueous stability; however, directly using it in water is still not applicable, thus limiting its dye photodegradation applications in aqueous solutions. Via adopting nitrogen-doped graphene quantum dots (NGQDs) as surfactants to prepare δ-phase CsPbI3nanocrystals, we obtained a water-stable material, NGQDs-CsPbI3. Such a material can be well dispersed in water for a month without obvious deterioration. High-resolution transmission electron microscopy and X-ray diffractometer characterizations showed that NGQDs-CsPbI3is also a δ-phase CsPbI3after NGQD coating. The ultraviolet-visible absorption spectra indicated that compared to δ-CsPbI3, NGQDs-CsPbI3has an obvious absorption enhancement of visible light, especially near the wavelength around 521 nm. The good dispersity and improved visible-light absorption of NGQDs-CsPbI3benefit their aqueous photocatalytic applications. NGQDs-CsPbI3alone can photodegrade 67% rhodamine B (RhB) in water, while after compositing with TiO2, NGQDs-CsPbI3/TiO2exhibits excellent visible-light photocatalytic ability, namely, it photodegraded 96% RhB in 4 h. The strong absorption of NGQDs-CsPbI3in the visible region and effective transfer of photogenerated carriers from NGQDs-CsPbI3to TiO2play the key roles in dye photodegradation. We highlight NGQDs-CsPbI3as a water-stable halide perovskite material and effective photocatalytic adjuvant.Keywords:nitrogen doping;graphene quantum dot;perovskite;photodegradation
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 40
·18659-18670
·
IF 3.3
Zhentao Wang,Waheed Iqbal,Jingjing Wang,Ninghui Chang,Chuanguang Qin
Degrading dye waste using inexpensive synthetic photocatalysts is intriguing since it provides the dual advantage of treating water and managing waste simultaneously. There is considerable interest in the construction of heterojunctions for their efficiency in using solar energy for the degradation of wastewater contaminants and enhancing the solar conversion efficiency. Herein, BiVO4 microspheres and 2D g-C3N4 nanosheets were used to synthesize a direct Z-scheme BiVO4/g-C3N4 heterojunction through a hydrothermal calcination approach. The distinct 0D/2D intimate contact heterostructure displayed a high interfacial area and broader visible-light absorption range together with high photoexcited charge pair mobility. Optimizing the content of the BiVO4 microspheres in the heterostructure led to the maximum efficiency for the visible-light photodegradation of rhodamine B (RhB), which was about 12.5 and 2.4 times higher than that for pure BiVO4 and g-C3N4, respectively. Moreover, the quenching effects of various scavengers demonstrated that ˙O2− and ˙OH radicals were the principal active species responsible for ameliorating the photocatalytic performance for RhB degradation. The demonstrated strategy for boosting the photocatalytic performance with Z-scheme systems may help the advancement of high-performance photocatalysts for sustainable and efficient pollutant degradation and energy applications.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Xiaomei Wang,Zhen Liu,Fa Zhou,Jianhan Huang
Imidazolium salt-incorporated postcross-linked porous polymers, namely, IL-PVB-pc-80%, were developed, and they were evaluated for the adsorption of rhodamine B (RB) and Cd2+ from aqueous solution. After N-vinylimidazole and p-dichloroxylene were inserted in the skeletons, IL-PVB-pc-80% contained both ionized imidazole moieties and plentiful mesopores. The adsorption experiments indicated that IL-PVB-pc-80% has excellent adsorption properties with a maximum capacity of 693.5 mg/g for RB and 373.3 mg/g for Cd2+. The adsorption mechanism revealed that the incorporated imidazolium salts were significantly beneficial for the adsorption.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 25
·11267-11283
·
IF 3.553
Peng Qian,Dai Ying,Liu Kun,Luo Xianping,He Dongsheng,Tang Xuekun,Huang Ganghong
There is an urgent need for an eco-friendly and efficient route to treat the organic pollutants in wastewater. Therefore, we report a facile synthesis of carbon nanotube–magnesium oxide composite (CNTs/MgO) which can efficiently activate peroxymonosulfate (PMS) to degrade Rhodamine B (RhB). Fabricated CNTs/MgO was characterized by XRD, FTIR, SEM, TEM, BET, XPS, and Raman. The results showed that the carbon nanotubes uniformly entangled on the MgO whiskers and linked to the MgO by Mg–C and C–O bonds. The effects of temperature, pH value, CNTs/MgO dosage, PMS dosage and the ratio of MgO/CNTs on degradation of RhB were conducted to determine the activation performance of CNTs/MgO. The catalytic degradation process was carried out in a wide pH range of 3–9, and 100% of RhB was degraded in 20 min under optimized conditions. Moreover, the efficient degradation performance was attributed to singlet oxygen generated in the PMS&CNTs/MgO system. The excellent activation properties of CNTs/MgO was derived from the enhanced electron transport performance and chemical bonding between MgO and CNTs. In addition, this work provides an innovative design for the development of novel PMS catalysts without transition metal components.
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