JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2025
·Vol. 36
·期 14
·1-20
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IF 2.8
Wen Jun,Rui Yiting,Yi Zichuan,Zhang Xiaowen,Lin Zhidong,Liu Liming
Herein, we report the facile hydrothermal synthesis of Bi 2 MoO 6 nanosheets, achieved through the combined use of surfactant-assisted and pH-controlled conditions. A comparative analysis of different types and concentrations of surfactants was conducted to determine the optimal conditions for synthesis. The resulting Bi 2 MoO 6 features a mesoporous architecture composed of interconnected nanosheets with an average pore size of approximately 3 nm. Characterization results reveal that this dual approach of surfactant addition and pH control effectively modulates the morphology and optimizes the band gap energy levels of bismuth molybdate materials, significantly enhancing the specific surface area. Notably, Bi 2 MoO 6 synthesized with 0.2 mmol of L-Tartaric acid (TA) achieved an exceptionally high response value of 118 to 100 ppm ethanol at an operating temperature of 200 °C, and the sensor demonstrated a practical detection limit as low as 20 ppb (S = 4.13), showcasing its high sensitivity. Additionally, the sensors demonstrated remarkable selectivity for ethanol, outperforming other gases in the concentration range of 100 ppm to 20 ppb. These findings underscore the promise of Bi 2 MoO 6 gas sensors prepared via surfactant addition and pH control for the rapid and sensitive detection of low ethanol concentrations at low temperatures. This method could have significant implications for environmental monitoring and industrial safety applications, where the detection of trace levels of ethanol is critical. This Bi 2 MoO 6 -based sensor, with its combination of high sensitivity, selectivity, and stability, stands out as a valuable tool for advanced gas sensing applications.
研究领域:
材料科学
·
化学工程
·
环境科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Liruhua Zhang,Zhixiang Chen,Yi Lu,Qingxia Liu,Lingbing Kong
The synergy between surface oxygen vacancies (OVs) and heterojunction engineering holds promising potential for substantially enhancing photoelectric conversion efficiency through the optimization of photogenerated charge carrier transport. Herein, novel WO 3 -OVs@Bi 2 MoO 6 S-scheme heterostructures are synthesized via a simple route for degradation of tetracycline hydrochloride (TC) using visible light. The S-scheme charge transfer mode markedly enhances the spatial separation and preservation of high-energy electrons/holes on Bi 2 MoO 6 (reduction) and WO 3 -OVs (oxidation), consequently providing WO 3 -OVs@Bi 2 MoO 6 photocatalysts with an improved redox capability. The optimal WO 3 -OVs@Bi 2 MoO 6 heterojunction demonstrates enhanced visible-light-driven photocatalytic degradation of tetracycline, exhibiting 4.86-fold and 4.17-fold higher efficiency compared to WO 3 -OVs and Bi 2 MoO 6 , respectively, with superior stability and reusability. Confirmation of the existence of the S-scheme charge transfer mechanism and oxygen vacancies (OVs) is achieved through a combination of density functional theory (DFT) calculations and in-situ X-ray photoelectron spectroscopy (XPS), substantiating the enhancement of charge separation and redox capability. Specifically, the presence of oxygen vacancies (OVs) on the surface of WO 3 nanofibers results in a reduction of the band gap energy due to the defect levels, consequently promoting increased electron conduction. Furthermore, the abundance of oxygen vacancies (OVs) expands the photo response range and facilitates charge transfer at the interface. This research opens new avenues for the successful photocatalytic degradation of tetracycline (TC) by integrating hierarchical S-scheme heterojunction design and cutting-edge defect engineering in photocatalytic heterojunctions.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 5
·1-12
·
IF 5.3
Ouyang Ruizhuo,Feng Meina,Liu Jinyao,Wang Caihong,Wang Zhongmin,Hu Xin,Miao Yuqing,Zhou Shuang
Rapid and sensitive detection of carcinoembryonic antigen (CEA) is of great significance for cancer patients. Here, molybdenum (Mo) was doped into bismuth oxide (Bi 2 O 3 ) by one-pot hydrothermal method forming porous tremella Bi 2 MoO 6 nanocomposites with a larger specific surface area than the spherical structure. Then, a new kind of hydrangea-like TiO 2 /Bi 2 MoO 6 porous nanoflowers (NFs) was prepared by doping titanium into Bi 2 MoO 6 , where titanium dioxide (TiO 2 ) grew in situ on the surface of Bi 2 MoO 6 nanoparticles (NPs). The hydrangea-like structure provides larger specific surface area, higher electron transfer ability and biocompatibility as well as more active sites conducive to the attachment of anti-carcinoembryonic antigen (anti-CEA) to TiO 2 /Bi 2 MoO 6 NFs. A novel label-free electrochemical immunosensor was then constructed for the quantitative detection of CEA using TiO 2 /Bi 2 MoO 6 NFs as sensing platform, showing a good linear relationship with CEA in the concentration range 1.0 pg/mL ~ 1.0 mg/mL and a detection limit of 0.125 pg/mL (S/N = 3). The results achieved with the designed immunosensor are comparable with many existing immunosensors used for the detection of CEA in real samples. Graphical abstract
研究领域:
生物医学工程
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分析化学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Qingqing Wang,Wei Zhou,Claudia Li,Sibudjing Kawi,Yinhui Li
The application of photocatalysts in environmental field has emerged as a prominent research topic. Nevertheless, the efficiency of photocatalysts is reduced as the recombination of photogenerated chargers significantly, restricting their extensive use in this domain. In the present study, photocatalysts composed of bismuth molybdate/NH 2 -UiO-66(Zr) (Bi 2 MoO 6 /NH 2 -UiO-66(Zr)) featuring Z-scheme heterojunctions were effectively synthesized using a two-step hydrothermal technique. These photocatalysts exhibit remarkable photocatalytic degradation under visible light conditions. Notably, the broad planar configuration of Bi 2 MoO 6 sheets improves the separation of the photogenerated charge carriers. NH 2 -UiO-66(Zr) layered atop Bi 2 MoO 6 sheets enhances the availability of catalytically active sites, reduces charge recombination, and promotes charge transfer through the interface. The kinetic rate constant for Bi 2 MoO 6 /NH 2 -UiO-66(Zr) is around 0.00329 L mg −1 min −1 , indicating the increase of 3.78 and 41.13 times compared with pure Bi 2 MoO 6 and NH 2 -UiO-66(Zr), respectively. The efficiency for photocatalytic degradation of tetracycline using Bi 2 MoO 6 /NH 2 -UiO-66(Zr) reaches 81.72 % under visible light. Importantly, this efficiency exhibits a reduction of 10 % after five recycling cycles, demonstrating notable stability. The photocatalytic mechanism involved in tetracycline degradation was uncovered through trapping experiments and EPR, indicating that it is predominantly facilitated by the active oxidation of ·O 2 - and ·OH. The intermediates of the photocatalytic process as well as the possible degradation pathways were discussed. The creation of Bi 2 MoO 6 sheets/NH 2 -UiO-66(Zr) heterojunction photocatalysts provides a fresh approach to the development of novel catalysts, which may lead to significant advancements in environmental remediation efforts.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Xiaoming Liu,Binquan Wu,Xueya Chen,Liushui Yan,Huiqin Guo,Kexin Li,Luping Xu,Jun Lin
In this work, a series of Mn x Cd 1-x S solid solutions as efficient photocatalysts for hydrogen evolution with visible light response were synthesized via a co-precipitation method firstly. Then, the hierarchical Bi 2 MoO 6 /Mn 0.2 Cd 0.8 S heterostructured composite was prepared by combining Mn 0.2 Cd 0.8 S composite with Bi 2 MoO 6 nanocrystalline through a hydrothermal process. The optimized Mn 0.2 Cd 0.8 S composite's photocatalytic activity is more than 3 times of pristine CdS and the prepared Bi 2 MoO 6 /Mn 0.2 Cd 0.8 S nanocomposites exhibited a significantly improved photocatalytic activity for hydrogen evolution from water with visible light response comparing with single Mn 0.2 Cd 0.8 S composite. The optimized photocatalytic activity of Bi 2 MoO 6 /Mn 0.2 Cd 0.8 S composite is around 10 times of pristine CdS. The excellent photocatalytic activity of Bi 2 MoO 6 /Mn 0.2 Cd 0.8 S composite might be ascribed to the well-matched energy band structures of the Bi 2 MoO 6 and Mn 0.2 Cd 0.8 S. Furthermore, the heterojunctions in Bi 2 MoO 6 /Mn 0.2 Cd 0.8 S composite might also do some contributions to improve its photocatalytic activities to some extent. A possible photocatalytic mechanism was proposed. Due to its excellent photocatalytic activity and good stability for hydrogen evolution from water, the obtained hierarchical Bi 2 MoO 6 /Mn 0.2 Cd 0.8 S composite has potential application in photocatalytic hydrogen evolution from water by using solar power.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Xiaojing Yang,Xinju Li,Bao Zhang,Taifeng Liu,Zhenpan Chen
Photocatalytic aerobic oxidation of hydrocarbons to ketones is an attractive route for synthesizing high-value-added chemicals. However, the main challenge of photocatalytic oxidation reactions is their low activity. Herein, hollow Bi2MoO6 microspheres were synthesized by a facile two-step synthesis route combining ethylene glycol solvothermal with postannealing treatment. In the photocatalytic aerobic oxidation of ethylbenzene to the corresponding ketones under visible light irradiation using O2 as an oxidant, the hollow Bi2MoO6 microspheres exhibit a record acetophenone production rate of 1.1 mmol g–1 h–1 with 90% selectivity. The photoactivity of oxygen vacancy-enriched Bi2MoO6 is 61 times higher than that of uncalcined Bi2MoO6, which can be attributed to the effective separation of photogenerated carriers and the abundant catalytic active sites (i.e., oxygen vacancies) on hollow Bi2MoO6 microspheres. This work provides more insights into understanding how to construct highly efficient and active visible-light-responsive photocatalysts for the aerobic oxidation of organic compounds.
研究领域:
材料科学
·
催化
·
化学工程
·
环境科学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yujing Xie,Chenhui Qiu,Lei Wang,Yuxuan Wang,Jie Zhang,Jinfeng Zhang,Hui Wan,Guofeng Guan
Photocatalytic CO 2 reduction to fuels via visible light is regarded as a highly promising sustainable technology to address resource depletion and environmental apprehensions. However, the elevation of photocatalytic performance is limited due to some drawbacks of isolated catalysts such as poor CO 2 adsorption performance, inadequate utilization of visible light, and rapid recombination of photo-generated carriers. Herein, a series of novel heterojunction catalysts, 1D/2D CeO 2 /Bi 2 MoO 6 (CBMO-X), were fabricated utilizing the microwave-assisted method for the photocatalytic reduction of CO 2 . The CH 3 OH yield of the optimized CBMO-10 composite material reached 4.31 μmol⋅g −1 ⋅h −1 with excellent stability and structural integrity. Through a series of characterizations, it was found that the introduced CeO 2 nanorods served as bifunctional sites for CO 2 adsorption and photoelectron accumulation, effectively promoting CO 2 conversion under visible light. In addition, CBMO-X exhibited faster photo-generated carriers migration rate due to the formation of the II-scheme heterojunction, which improved the photocatalytic performance obviously. Furthermore, the density functional theory (DFT) calculations and in situ XPS were used to investigate the carrier migration paths on the surface of composite materials. This work provided a novel strategy for the design of photocatalysts for efficient CO 2 conversion.
研究领域:
材料科学
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环境科学
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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
·
2022
·
IF 7.392
Deyu Wang,Kun Li,Cong Zhou,Lei lei,Yoann de Rancourt de Mimérand,Xiaoyun Jin,Jia Guo
In this study, we expose various techniques based on cold plasma discharge (CPD), and more precisely aqueous-phase plasma-aided grafting (APPAG), to efficiently modify the surface of polymers as well as fabric made of natural fibers. Several directions were investigated to ultimately add a functional coating providing an antimicrobial effect to textiles. Our strategy relies on the immobilization of silver nanoparticles (AgNPs) and Bi 2 MoO 6 (BMO) – a robust inorganic photocatalyst that can be activated by visible light – microflowers, at the surface of cotton fabric fibers. Notably, an in situ complexation-assisted precipitation route (ISCAP – an original method derived from CPD) was successfully employed to generate a very uniform coating of silver nanoparticles at the surface of organic substrates. As we demonstrate in this study, the surface functionalization with BMO and silver provides a significant protection against bacteria in dark conditions, through a bacteriostatic effect of nano silver, and under low-intensity artificial visible light (thanks to the photocatalytic effect of BMO/Ag), hence suitable for an indoor environment such as hospitals. Our composite nanomaterial, cotton/BMO/AgNPs, was assessed through antibacterial testing with Escherichia coli (E. coli) and Staphylococcus aureus (S. Aureus) , showing a pronounced antimicrobial effect with both strains. This study opens prospects for the functionalization of natural or artificial fiber materials with possible applications in the field of biomedical protective equipment such as bandages, masks or technical cloths; or even photocatalysis.
研究领域:
材料科学
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生物医学工程
·
微生物学
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DOI
高影响因子
VACUUM
·
2019
·
IF 2.515
Xing Gao,Xiaodi Ji,Tat Thang Nguyen,Xinchao Gong,Rusong Chai,Minghui Guo
Composite materials made from renewable resources are challenging, requiring innovative research. In this study, carbon quantum dots (CQDs) were obtained via a simple hydrothermal method using waste larch wood as the raw material without the use of toxic reagents. The CQDs have a delocalized conjugated structure and can cause rapid photogenerated electron-hole pair separation and a relatively slow recombination. They also emit blue-green light upon independent excitation and are potential candidates for use as novel activators. 3D Bi 2 MoO 6 hollow microspheres are expected to become competitive structures, since they can be synthesized via a mixed solvothermal method without the need for added surfactants or other hard-template conditions. The formation mechanism of Bi 2 MoO 6 hollow microspheres was systematically examined. Bi 2 MoO 6 hollow microspheres were selected in this research as the matrix and were doped with CQDs to synthesize a new composite material, CQDs/Bi 2 MoO 6 . It was observed that methylene blue could be degraded by Bi 2 MoO 6 hollow microspheres using visible light irradiation, and the photocatalytic performance was increased when modified with CQDs. Additionally, the separation of photogenerated electron-hole pairs was enhanced via the addition of CQDs to Bi 2 MoO 6 . Thus, the CQDs/Bi 2 MoO 6 system was more effective for the degradation of methylene blue when irradiated using visible light.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2019
·Vol. 19
·期 12
·7635-7644
·
IF 1.093
Rong Qianyun,Zhang Dapeng,Li Ying,Zha Zhenxing,Geng Xinxiang,Cui Shihai,Yang Jing
A novel Bi2MoO6/Bi2Ti2O7 heterojunction photocatalyst was firstly prepared by a simple solvothermal route. The as-synthesized photocatalysts were characterized by scanning electron microscopy, transmission electron microscopy, X-ray
diffraction, X-ray photoelectron spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy and photoluminescence spectra. The effect of the material ratio, solution pH, and the salinity on glycolic acid degradation were discussed. The Bi2MoO6/Bi2Ti2O7
(2:1) nanocomposite exhibits highest photocatalytic performance and chemical stability. The glycolic acid degradation efficiency can reach 99.9% at pH 4 after 150 min irradiation under visible light. The enhanced photocatalytic activity can be ascribed to the heterojunction interface in the
composite, which is beneficial to the efficient charge carriers transfer. The degradation conforms to the pseudo-first-order kinetics. According to the oxidation species trapping experiments, the ·O2
−, h
+ and ·OH
are found to play important roles in the photocatalytic degradation and ·O2
− is the main active species. The possible photocatalytic mechanism was further discussed on account of valence band, conduction band positions and possible transition states.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jiamin Li,Changheng Chen,Jiangwen Bai,Yuehui Jin,Chongfeng Guo
Although self-polarized piezoelectric semiconductor photocatalysts significantly enhance the separation of internally generated photocarriers, their photocatalytic performance is constrained by insufficient internal polarisation and a wide bandgap. Additionally, the low concentration of oxygen in contaminated water limits the effectiveness of such photocatalysts. To the best of our knowledge, this study was the first to determine that the piezoelectric properties of Bi 2 MoO 6 (BMO), was due to the polarisation displacement of the MoO 6 octahedron that occurred along the x -axis, as revealed through density functional theory (DFT) calculations. Subsequently, the self-polarisation characteristics of BMO were enhanced and the bandgap was reduced through Fe 3+ doping, as confirmed via atomic force microscopy, hysteresis loop measurements and DFT analysis, resulting in an increase in surface potential from 30.41 to 46.80 mV. Furthermore, an S-scheme WO 3 /Bi 2 MoO 6 :Fe 3+ heterojunction was developed to improve the surface separation of photoelectron–hole pairs. The piezoelectric photocatalytic performance of this sample was evaluated through the degradation of rhodamine B (RhB) and oxygen generation. Results indicated that the degradation rate of RhB reached 98.63 % within 25 min under the synergistic influence of light and ultrasound, which was 1.85 and 9.60 times higher than those of Bi 2 MoO 6 and WO 3 , respectively. Furthermore, the optimal oxygen production efficiency was 167.41 µmol·g −1 ·h −1 . This study provides a novel approach for designing more efficient piezoelectric photocatalysts.
研究领域:
材料科学
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环境科学
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理论计算
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2018
·
IF 3.927
Junhui Yi,Huimei Mo,Bangliang Zhang,Jiaxing Song,Dongqin Liu,Guanjie Zhuo
CeO 2 /Bi 2 MoO 6 heterostructured microspheres were successfully synthesized through precipitation and hydrothermal method. The as-obtained samples were well characterized by XRD, SEM, TEM, UV–Vis DRS and XPS. The photocatalytic activity was evaluated by degrading acid orange II (AO-II) under visible light irradiation. The test results show that CeO 2 /Bi 2 MoO 6 heterostructured microspheres have broad absorption in the visible region and have more superior catalytic activities than pure Bi 2 MoO 6 , which is attributed to the synergistic effect of the suitable band gap matching between CeO 2 and Bi 2 MoO 6 . Moreover, 0.1CeO 2 /Bi 2 MoO 6 composite has the highest activity. Radical scavenger experiments proves that the superoxide radical anions ( O 2 − ) and photogenerated holes (h + ) are dominating active species. The recycling experiment confirms that CeO 2 /Bi 2 MoO 6 heterostructure keep high stabilization during the photocatalytic reaction. On this basis, a photogenerated charge carriers transfer and photocatalytic progress on the CeO 2 /Bi 2 MoO 6 heterostructure has been discussed.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）