CATALYSIS TODAY
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2018
·
IF 4.667
Ming Wu,Hongying Lv,Teng Wang,Zhimin Ao,Hongqi Sun,Chengyin Wang,Taicheng An,Shaobin Wang
Graphitic carbon nitride (g-C 3 N 4 ), a promising metal-free photocatalyst, shows a high thermal stability, excellent chemical stability, and great optical absorption of solar light. However, a short life of activated electron-hole pairs limits g-C 3 N 4 in practical applications. In this work, Ag 2 MoO 4 nanoparticles encapsulated in g-C 3 N 4 (Ag 2 MoO 4 /g-C 3 N 4 ) was synthesized with a facile in-situ precipitation method. A variety of characterization techniques were applied for analyzing the compositions, morphologies and optical properties of Ag 2 MoO 4 /g-C 3 N 4 . The band structure of Ag 2 MoO 4 produces a synergistic effect with g-C 3 N 4 , which can efficiently increase solar light absorption and reduce the recombination rate of the photo-induced electron-hole pairs. Therefore, this hybrid catalyst presents a much higher photocatalytic activity for the degradation of various organic pollutants (bisphenol A, acyclovir, and methyl orange) and strong stability under both artifical and real sunlight, which is promising for practical application.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2018
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IF 2.891
Zhongyi Jiao,Junlei Zhang,Zhendong Liu,Zhen Ma
Ag 2 MoO 4 shows low photocatalytic activity under visible light. It would be interesting to develop Ag 2 MoO 4 -based composite/heterojunction photocatalysts working efficiently under visible light. Herein, novel Ag/AgCl/Ag 2 MoO 4 composites were obtained via photoreduction of AgCl/Ag 2 MoO 4 composites prepared by sequential precipitation. The composition, morphologies, and optical properties of the samples were studied via various characterization techniques. Photocatalytic degradation of rhodamine B (RhB), methylene blue (MB), methyl orange (MO), norfloxacin (NOF), and tetracycline hydrochloride (TC) solutions was conducted under visible-light irradiation. An optimal Ag/AgCl/Ag 2 MoO 4 catalyst showed much higher photocatalytic activity than Ag 2 MoO 4 , and it also showed reasonably fine recyclability. Through radical-capturing experiments, photogenerated holes (h + ) were determined to be the main active species whereas hydroxyl radicals ( OH) were found to play a secondary role in photocatalysis. Possible photocatalytic mechanisms were proposed.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Rui Guo
The metastable α-Ag 2 MoO 4 was usually prepared under high pressure conditions, but it was successfully prepared by epitaxial growth on WO 3 nanosheets at room temperature under normal pressure in this work. The interfacial structure of α-Ag 2 MoO 4 /WO 3 (AW) was characterized by XRD , SEM, TEM, and Raman spectra to explain the process of phase transformation from the β phase to the α phase. The photocatalytic activities were evaluated by the degradation of methylene blue and Escherichia coli . The results indicate that AW-60 exhibits the best photocatalytic activity. The enhancement in photocatalytic performance is mainly due to the photogenerated electron flow between the components from WO 3 to Ag 2 MoO 4 in AW-60. The initial inactivation of E. coli is due to the decomposition of macromolecules with a typical mass range m / z of 2–7 kDa. The corresponding photocatalytic mechanism was proposed and confirmed by the measurements, such as BET, fluorescence spectrum, free radical trapping and the ζ potential of WO 3 and AW-60.
研究领域:
材料科学
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环境科学
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微生物学
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DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2017
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IF 4.217
Junlei Zhang,Zhen Ma
Visible-light-driven photocatalysis for removing industrial dyes and antibiotics in waste water has attracted much interest. New catalysts with enhanced photocatalytic performance have been actively sought. Herein, via a simple sequential precipitation method, AgI nanoparticles were anchored onto micron-sized β-Ag 2 MoO 4 particles to form AgI/β-Ag 2 MoO 4 p–n heterojunctions. These heterojunctions exhibited remarkably upgraded activities in the visible-light-driven photocatalytic degradation of rhodamine B, methyl orange, and tetracycline hydrochloride compared with pristine AgI and β-Ag 2 MoO 4 . The enhanced photocatalytic activity can be mainly attributed to the tight heterojunction structure and well matched energy band that may facilitate the separation and transfer of photogenerated electron–hole pairs. Photogenerated holes (h + ) and superoxide radical anions (•O 2 − ) were found to be the main active species. A possible photocatalytic mechanism was proposed.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Bin Wang,Chengle Wang,Yanting Tang,Hao Yang,Yajie Tian,Xin Yu,Qian Li
High-performance composite photocatalysts attracts considerable research interests for the photodegradation of emerging pollutants under visible-light irradiation. In this study, hybrid AgCl-coated Ag 2 MoO 4 composites were synthesized using a chemical deposition strategy for the photodegradation of organic pollutants. The successful establishment of Ag 2 MoO 4 @AgCl nanostructures led to a highly decreased recombination of photo-generated electrons and holes, as well as significantly improved charge separation. The synthesized Ag 2 MoO 4 @AgCl composites exhibited markedly enhanced photocatalytic performance for the degradation of organic pollutants compared to pristine Ag 2 MoO 4 and AgCl due to the creation of unique heterostructures with strongly combined interfaces. Notably, the obtained Ag 2 MoO 4 @AgCl-11 composite demonstrated the highest photocatalytic performance for levofloxacin degradation with a first-order kinetic constant of 0.0436 min −1 , which was 31.14 times that of Ag 2 MoO 4 sample and 8.90 times that of AgCl sample. Furthermore, the synthesized Ag 2 MoO 4 @AgCl composites showcased an excellent photocatalytic stability. This work highlights the great potential of Ag-based composite photocatalysts for the efficient photodegradation of emerging pollutants under visible-light irradiation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 10
·13305-13322
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IF 2.478
Gu Yufen,Guo Bobo
Here, the novel Ag 2 MoO 4 /Bi 2 WO 6 (AMO/BWO) heterojunction composite photocatalysts were synthesized based on the combination (co-precipitation method + hydrothermal method) XRD, XPS, SEM, TEM, UV–Vis DR spectroscopy, PL spectroscopy, FTIR spectroscopy, as well as EIS analyses were employed to characterize the photocatalysts, and photocurrent response was utilized to confirme the formation of Z-type heterojunction. The generation and transfer of electron/holes in the AMO/BWO heterojunctions excited by simulated sunlight were analyzed. Under simulated sunlight, the photocatalytic performance of AMO/BWO composites were studied by degradation of organic pollutants. The experimental results show that the 30 wt% AMO@BWO is the best photocatalytic composite material among all samples and the degradation rate reached 98.6%. Due to the prolonging of lifetime of the photoexcited electrons in the CB of AMO and holes in the VB of BWO, these carriers are more effective to participate in photodegradation reactions. An electron/hole transfer mechanism of the Z-scheme heterojunctions is proposed to illustrate the enhanced photodegradation performance of the AMO/BWO composite samples.
研究领域:
材料科学
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环境科学
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光催化技术
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2020
·Vol. 44
·期 8
·3194-3205
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IF 3.288
Jiabin Liu,Bowen Yang,Minghuan Gao,Lisha You,Yuansen Zhang,Zhiying Li,Linna Guo,Tiesheng Li,Penglei Chen,Minghua Liu
A series of novel efficient polyhedron-like WO3/butterfly-like Ag2MoO4 p–n junction photocatalysts (denoted as AMW-x) were designed and synthesized. The exact phase structure, microscopic morphology, electrochemical properties, physical properties and optical properties of the prepared samples were characterized by XRD, SEM, EDS, TEM, HRTEM, UV-DRS, PL, FL, XPS, UPS, BET, MS (Mott–Schottky test), EIS and photocurrent measurements. The photocatalyst could effectively degrade rhodamine B (RhB) under UV/Solar region light illumination. In this system, a p–n junction structure formed by the two different materials effectively enhanced the generation rate of photo-induced electrons and reduced the transfer resistance. These results exhibited that enhanced photocatalytic performance of materials were prepared. The activity of AMW-20 was 548.2/496.8, 57.9/146.1, and 3.7/17 times higher than polyhedron-like WO3, butterfly-like Ag2MoO4, and commercial powder (P25) under UV/Solar region light illumination. The photocatalytic mechanism mode for the improved photocatalytic performance was also proposed.
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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DOI
高影响因子
LANGMUIR
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2022
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IF 4.331
Yirui Zhao,Hang Yang,Hongshun Hao,Fuxiao Zhu,Gongliang Zhang,Jingran Bi,Shuang Yan,Hongman Hou
The removal of organic dyes and pathogenic bacteria from contaminated water remains a significant challenge. In the present study, S-type heterojunction Ag2MoO4/ZnFe2O4 (AMO/ZFO) composite nanofibers were synthesized by electrospinning and co-precipitation and fabricated into photoanodes. It is found that the constructed S-type heterojunction of AMO/ZFO composites effectively inhibits the recombination of photogenerated carriers, in addition to the benefits of more exposed active sites and a greater specific surface area. When several properties are improved, AMO/ZFO composites exhibit excellent photoelectrocatalytic performance. The results demonstrate that under visible light irradiation, the photoelectrocatalytic degradation rate of AMO/ZFO-3 to methylene blue reached 76.2% within 50 min, and the killing rate of Salmonella was 83.6% within 80 min. The enhanced photoelectrocatalytic activity was due to the synergy of both electrochemical and photocatalytic effects. More importantly, after four testing cycles, AMO/ZFO-3 still has a better ability to kill pathogenic bacteria and degrade organic dyes due to its high stability. This work provides a feasible method for oxidizing organic dyes and pathogenic bacteria.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2024
·
IF 4.4
Xiaohua Zheng,Chenbin Cai,Shihui Lu,Mengnan Xu,Wei Chen,Fanger Yang
Recently, the photocatalytic degradation of organic pollutants has gained increasing attention because of its high efficiency and lack of secondary pollution; however, problems such as rapid electron–hole recombination affect its degradation efficiency. In this study, a novel dual Z-scheme g-C 3 N 4 /Ag 2 MoO 4 /AgBr heterojunction was successfully prepared using a one-step room-temperature precipitation method, with its photocatalytic activity evaluated by degrading rhodamine B (RhB) and tetracycline hydrochloride (TCH). The composition and surface morphology of the ternary catalysts—characterized using X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Brunauer–Emmett–Teller (BET) tests, and X-ray photoelectron spectroscopy (XPS)—confirmed the successful loading of Ag 2 MoO 4 and AgBr onto g-C 3 N 4 . Catalytic degradation results showed that the ternary catalyst exhibited the best performance at a 40 % mass fraction of AgBr. Moreover, the ultraviolet–visible diffuse reflectance spectra (UV–Vis DRS), photoluminescence (PL), electrochemical impedance spectroscopy (EIS), and transient photocurrent response test results show that the ternary catalyst has excellent optical properties. In addition, the significant improvement in the catalytic performance can be attributed to the effective charge separation of the dual Z-scheme photocatalytic mechanism based on radical trapping experiments, electron spin resonance (ESR) analysis, and energy band analysis. Hence, this study provides a new approach to studying more efficient photocatalysts.
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
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Wentao Ye,Yu Jiang,Qi Liu,Doudou Xu,En Zhang,XinWei Cheng,Zhou Wan,Chen Liu
Photocatalytic technology has been attracting considerable attention due to its low cost and environmental friendly properties. In this work, a novel ZnO/Ag 2 MoO 4 /Ag (ZAA) nanocomposite was prepared by an ultrasonic-irradiation method as an efficient visible-light-driven photocatalyst. The structure and photocatalytic property of the photocatalyst were studied by XRD , SEM, FTIR, XPS , TEM , UV–vis DRS and PL Spectroscopy, respectively. The results indicated that the Ag 2 MoO 4 nanocomposites were successfully decorated on the ZnO sheets which grabbed Ag NPs. Benefiting from local surface plasmon resonance effect of metallic silver and the formation of heterojunctions between the counterparts of ZnO and Ag 2 MoO 4 , it effectively suppresses recombination of photogenerated charge carriers, which can enhance good photocatalytic properties and antibacterial activities. An optimal photocatalysis of ZAA with molar ratio of ZnO to Ag 2 MoO 4 at 40:1 performed the highest degradation rate for rhodamine B under visible light irradiation. In addition, over 99.999% of Gram-negative E. coli and 99.846% of Gram-positive S. aureus were reduced by ZAA-40 nanocomposites within 60 min in comparison to pure ZnO sheet. These results demonstrate that ZAA is a promising photocatalyst, making it a prospective strategy to overcome current challengers in the use of organic pollutant degradation and the photocatalytic antibacterial area.
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
FUEL
·
2025
·
IF 7.5
Lina Dai,Qiang Li,Xianglan Dong,Enqi Zhang,Yufeng Hu,Xin Guo,Yanduo Liu
Photocatalysis exhibits great potential for applications in solving energy and environmental problems, and has received widespread attention. This article constructs a new type of Mn-Fe Prussian blue analogues S-scheme mechanism photocatalytic material. The material is composed of oxidized photocatalysts (Ag 2 MoO 4 ) and reduced photocatalysts (Mn-Fe PBAs). The composite photocatalyst constructed in this way shows advantages such as a wide spectral response range, high charge carrier separation efficiency, and strong oxidation–reduction ability, which can significantly enhance photocatalytic efficiency. By studying the construction method and CO 2 reduction performance of the photocatalyst, the structure-performance relationship can be clarified. The CO production rate is 43.3 μmol/g/h, and the selectivity can reach 94.9 %, which is far superior to the current mainstream photocatalytic system. The electron transfer kinetics and S-scheme charge separation mechanism between the Mn-Fe PBAs and Ag 2 MoO 4 interfaces are explained by steady-state surface photovoltage spectroscopy (SS-SPS) and near ambient pressure XPS (NAP-XPS). In-situ DRIFTS techniques are used to monitor the changes of transition intermediates, and combined with theoretical calculations, the activation mechanism of CO 2 by the Mn-Fe catalytic site is deeply revealed at the atomic level. This study provides new theoretical guidance and profound insights for the construction of Prussian blue analogues photocatalysts.
研究领域:
材料科学
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环境科学
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物理化学
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纳米技术
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催化
·
能量转换
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产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2019
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IF 2.781
Seseg Damdinova,Wencong Liu,Shang Wang,Bato Dugarov,Zongmin Su,Zhiqiang Cheng
In this work, TiO 2 nanofibers were prepared by combining electrospinning with an impregnation calcination technique. Ag 2 MoO 4 nanoparticles at various concentrations were successfully deposited onto the surface of the nanofibers by hydrothermal synthesis method . Photocatalytic activities of samples for methyl orange degradation were investigated. The results indicate that Ag 2 MoO 4 –TiO 2 nanofibers could efficiently degrade methyl orange upon the irradiation with UV-light, showing a greater photocatalytic activity than the pure titanium dioxide.
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高影响因子
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