APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
·
IF 16.683
Xianying Wang,Yingshu Wang,Meichao Gao,Jinni Shen,Xipeng Pu,Zizhong Zhang,Huaxiang Lin,Xuxu Wang
Construction of composite semiconductors is an effective solution to elevate the efficiency of photocatalysis by prolonging lifetime of photogenerated hole and electrons. Herein, a heterojunction structure composite BiVO 4 /Bi 4 Ti 3 O 12 was synthesized via a facile in situ hydrothermal condition. The novel composite photocatalyst has excellent photocatalytic ability to reduce CO 2 with H 2 O into CH 3 OH and CO. The BiVO 4 /10 % Bi 4 Ti 3 O 12 sample shows the highest yields of CH 3 OH and CO up to 16.6 and 13.29 μmol g −1 h −1 , which was 12.39 and 5.68 times higher than that of pure BiVO 4 , and 9.88 and 2.80 times higher than that of pure Bi 4 Ti 3 O 12 , respectively. Such a high activity is attributed to the type II heterojunction structure which significantly enhances separation of photogenerated carriers and promotes collaboration between the water oxidation on the Bi 4 Ti 3 O 12 and the CO 2 reduction on BiVO 4 . The photocatalytic reaction mechanism of CO 2 on the composite was proposed according to experiment results.
研究领域:
材料科学
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环境科学
·
化学工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Gongduan Fan,Xia Li,Jiuhong Lin,Xinyi Wu,Ling Zhang,Jiaxin Wu,Yingmu Wang
In this work, a facile separation of self-floating Ag 3 VO 4 /BiVO 4 hydrogel (ABVH) photocatalyst was constructed via the freeze-thaw method for the inactivation of Microcystis aeruginosa . The as-synthesized photocatalyst exhibited excellent photocatalytic performance, resulting in the degradation efficiency of chlorophyll a reaching approximately 99.6% within 4 h under visible light. The cell morphology, intracellular organic matter (IOM), extracellular organic matter (EOM), and antioxidant system were severely disrupted during the photocatalytic process. The inactivation mechanism could be ascribed to the ·OH and h + generated by hydrogel photocatalyst under visible light irradiation. Furthermore, five repetitive experiments and cyclic compressive stress-strain tests demonstrated that the as-prepared hydrogel possessed excellent reusability and mechanical strength properties. Besides, the hydrogel photocatalyst showed excellent potential for the removal of M. aeruginosa in the presence of natural organic matter (NOM). Overall, the synthesized self-floating hydrogel photocatalyst may offer a novel insight into the control of harmful cyanobacterial blooms.
研究领域:
环境科学
·
微生物学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 23
·10761-10768
·
IF 9.931
Yidan Liu,Yi Jiang,Fei Li,Fengshou Yu,Wenchao Jiang,Lixin Xia
Photoelectrochemical (PEC) water splitting is a promising method for the conversion and storage of solar energy. A combination of catalysts with photoelectrodes is generally required for the development of active photoanodes in PEC devices. In this work, we present two BiVO4 photoanodes modified with cobalt salophen (Co(salophen)) complexes for PEC water oxidation. The resulting photoanodes show significantly enhanced PEC performance. Under simulated sunlight illumination (AM 1.5G, 100 mW cm−2), high photocurrents of 3.89 mA cm−2 and 4.27 mA cm−2 were obtained for Co1/BiVO4 and Co2/BiVO4, respectively at 1.23 V (vs. the reversible hydrogen electrode (RHE)) in a neutral solution, an almost three-fold enhancement over that of the unmodified BiVO4. Intensity-modulated photocurrent spectroscopy (IMPS) analysis shows that the Co(salophen) complexes not only accelerate the water oxidation reaction but also reduce the surface recombination. The half-cell solar energy conversion efficiencies for Co1/BiVO4 and Co2/BiVO4 were 1.09% and 1.18% at 0.7 V, respectively. Due to their hydrophobic nature, the Co(salophen) complexes can bind strongly to the surface of BiVO4. When the Co2 complex featuring four hydrophobic tert-butyl groups in a salophen ligand was anchored to BiVO4, an extremely stable photocurrent of more than 3.5 mA cm−2 at 1.23 V vs. RHE is sustained for at least 3 h without decay. Such a stable and robust photoanode based on a molecular WOC surpasses those attained by most of the state-of-the-art heterogeneous catalysts.
研究领域:
材料科学
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能源转换
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催化化学
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
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2018
·Vol. 47
·期 30
·10288-10298
·
IF 4.099
Boyuan Li,Zhenhua Cao,Shixuan Wang,Qiang Wei,Zhurui Shen
Herein, we report a BiVO4 quantum dot (QDs)-decorated BiPO4 nanorods 0D/1D heterojunction via an in situ growth method. It showed enhanced visible-light-driven photocatalytic activity for degrading Rhodamine B (Rh B) compared to its pristine counterparts in composite. The mass ratio of BiVO4/BiPO4 was then varied from 3 wt% to 50 wt% and the optimum value was found to be 30 wt%, showing 8.3-fold and 6.3-fold apparent reaction rates higher than those of pristine BiPO4 and BiVO4, respectively. Moreover, all of the reduced Rh B was transformed into CO2 and H2O during the photocatalysis, thus showing the good mineralization ability (almost 100%) of the composite. Furthermore, the photocatalytic mechanism of the composite was also investigated here by the zeta potential, scavenger experiments, electron paramagnetic resonance (EPR), photoluminescence spectroscopy (PL), transient photocurrent and electrochemical impedance spectroscopy (EIS). Results show that (i) ˙OH was the main reactive species and (ii) BiVO4 could form a heterojunction with BiPO4, thus widening the response range to the visible region and accelerating the charge separation and transfer.
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
Materials
·
2016
·Vol. 9
·期 3
·129
·
IF 2.728
Zhengyao Qu,Peng Liu,Xiaoyu Yang,Fazhou Wang,Wenqin Zhang,Chenggang Fei
In the present study, BiVO4sample was prepared under different pH 0.5–13 without capping agent. Different morphology characteristics were observed, such as sheet crystal structure, cross crystal structure and branching crystal structure. The mechanism of the formation of BiVO4nanostructure was discussed. Under acid condition, sheet crystal structure was obtained. The phenomenon could be attributed to polymerization of vanadate in the presence of H+. In the weak alkaline solution, across structure and branching type morphology was obtained. The photocatalytic efficiency for the samples ranked as pH 5 > pH 3 > pH 7 > pH 9 > pH 1 > pH 11 > pH 13 > blank, which is in good agreement with X-ray diffraction (XRD) result.E. colienvelop was damaged in the presence of BiVO4under visible light. The protrusion on envelop was diminished by BiVO4. Attenuated Total Reflection Fourier transformed Infrared Spectroscopy (ATR-FTIR) results suggested the intensity was weakened for the amide, phosphoric, –COO−group and C-H bond in lipopolysaccharides (LPS), peptidoglycan and periplasm molecules.Keywords:BiVO4;monoclinic scheelite structure;photocatalytic efficiency;E. coli;envelop
研究领域:
材料科学
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微生物学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 22
·1-21
·
IF 2.8
Nazir Ahsan,Huo Pengwei,Jagirani Muhammad Saqaf,Akram Muhammad Yasir,Wang Huijie
In this study, a plasmonic p–n heterojunction Ag@Ag 2 O–BiVO 4 photocatalyst was successfully prepared by a simple chemical precipitation-reduction process. The obtained samples were tested by various measurements and the photocatalytic behavior in the decomposition of tetracycline (TC) under irradiation with visible light was studied. The photodegradation study exhibits that Ag@Ag 2 O–BiVO 4 has the optimum activity and can efficiently degrade 83.52% of TC in 60 min by irradiation with visible light. Furthermore, the Ag@Ag 2 O–BiVO 4 exhibited more pronounced visible light absorption and the best performances than the BiVO 4 and Ag 2 O–BiVO 4 , which was mainly due to the LSPR of plasmonic Ag. The experimental radical trapping proved that the active species of the photocatalytic process act in the following order: ·O 2 − > h + > · OH. To find intermediates, the possible TC degradation pathways via HPLC–MS were also investigated. This research provides a successful method to develop a plasmonic photocatalyst with p–n heterojunction for wastewater treatment.
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
ChemCatChem
·
2020
·Vol. 12
·期 14
·3769-3775
·
IF 4.853
Guihua Zeng,Liqiong Hou,Jialing Zhang,Jiaqian Zhu,Xiang Yu,Xionghui Fu,Yi Zhu,Yuanming Zhang
Graphical PEC water splitting : A novel FeOOH/rGO/BiVO 4 photoanode was prepared for the first time with excellent PEC performance in which rGO as a hole-transporting layer significantly enhanced carrier separation efficiencies and FeOOH greatly accelerated the water oxidation kinetics. Bismuth vanadate (BiVO 4 ) is regarded as a potential material in photoelectrochemical (PEC) water splitting, but the photocurrent of BiVO 4 photoanode is much lower than its theoretical value for the high recombination of photo-induced charges and slow water oxidation kinetics. Here, we constructed a FeOOH/rGO/BiVO 4 photoanode, in which rGO could enhance the photogenerated electron-hole separation efficiency by transporting holes and the FeOOH could greatly accelerate the water oxidation kinetics. This novel photoanode displayed excellent PEC performance with the photocurrent density of 3.25 mA cm −2 at 1.23 V vs. RHE, 3.28 times higher than BiVO 4 photoanode (0.99 mA cm −2 ), and long-term stability with the Faraday efficiency of ∼98 % for 3 hours, demonstrating its great potential for PEC water splitting. The photoanode also provided a novel insight into the role of rGO to transport holes rather than electrons in improving the carrier separation efficiency.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2019
·
IF 1.901
Ruijie Yang,Jiansheng He,Minli Niu,Yingying Fan,Rongshu Zhu
In recent years, using graphene to modify BiVO 4 has become a research hotspot. However, there are few reports on the effects of the graphene size and the loading content on the photocatalytic activity of the graphene-modified BiVO 4 . In this work, a series of BiVO 4 photocatalysts modified by oxide graphene (GO) of different sizes and loadings were prepared, characterized and their activities were investigated. The results showed that when the size of GO was 5–7 μm and the loading was 0.5 wt%, the phenol degradation rate over the GO-modified BiVO 4 was the best and reached 65.2% after 5 h visible light irradiation.
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
Nanomaterials
·
2023
·Vol. 13
·期 20
·2764
·
IF 5.3
Muneerah Alomar,Naila Arshad,Muhammad Sultan Irshad,Shaimaa A. M. Abdelmohsen,Iftikhar Ahmed,Nawal Alhoshani,Areej S. Alqarni
Developing a sustainable environment requires addressing primitive water scarcity and water contamination. Antibiotics such as oxytetracycline (OTC) may accumulate in the environment and in the human body, increasing the risks to the ecosystem. The treatment of polluted water and the production of potable water can be achieved in a variety of ways, including photodegradation, solar distillation, and filtration. Freshwater supplies can be increased by implementing energy-efficient technologies for the production of clean water. Solar water evaporation combined with photocatalytic degradation and sterilization offers a promising avenue for integration into the clean water and energy production fields. The present study reports the synthesis of a 3D solar steam generator comprised of BiVO4and carbon nanotubes (CNT) nanocomposite decorated over a cigarette filter as the light-to-heat conversion layer for solar steam generation. The BiVO4@CNT-based 3D solar evaporator over the hydrophilic cellulosic fibers of the cigarette filter endowed excellent evaporation rates (2.36 kg m−2h−1) under 1 kW m−2solar irradiation, owing to its superior hydrophilicity and broadband solar absorption (96%) equipped with localized heating at microscale thermal confinement optimized by the minimum thermal conductivity of the overall system. Furthermore, the BiVO4@CNT composite exhibited a heightened photo activity up to 83% of the photodegradation of oxytetracycline (OTC) antibiotic due to the inhibition of charge recombination from the industrial effluents. This approach transforms the water-energy nexus into a synergistic bond that offers opportunities to meet expected demand, rather than being competitive.Keywords:solar evaporation;BiVO4;MWCNTs;photocatalytic;freshwater;oxytetracycline
研究领域:
环境科学
·
材料科学
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生物学
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产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Yulin Deng,Ruihan Huang,Xiang Li,Yuyi Wang,Jing Tian,Meng Zhu,Xiaobo Gong
BiVO4 is a stable photocatalytic material but has poor photocatalytic activity in visible light. Herein, the surfactants were investigated to enhance the photocatalytic degradation of tetracycline (TC) of BiVO4 through a hydrothermal method. The different molecular structures and properties of surfactant-modified BiVO4 show clustered small spheres and stacked plate-like microcrystals. The N-hexadecyltrimethylammonium chloride (CTAC)-modified BiVO4 (BiVO4-CTAC) with stacked plate-like morphology increases the light absorption range and decreases the energy band gap. Surfactants with different hydrophilic groups and molecular structures affect the formation process of BiVO4, regulating the morphology, crystal structure, and crystalline surface exposure of BiVO4. BiVO4-CTAC has demonstrated superior TC degradation efficiency compared with the original BiVO4 (BiVO4-Blank). This enhancement is attributed to the observation in the Nyquist plot, where BiVO4-CTAC exhibits the smallest arc radius, indicative of reduced charge transfer resistance and improved charge separation. Furthermore, holes (h+) and superoxide radicals (•O2–) reactive species are the main active radicals for TC photocatalytic degradation. This study develops a novel method to synthesize monoclinic phase lamellar BiVO4 materials by simply changing the surfactant type. This study holds potential implications for advancing surfactant-assisted synthesis of high-efficiency photocatalysts.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Dinh-Trinh Tran,Thi-Phuong-Thao Vu,Santi Kongmany
In this study, ZnFe 2 O 4 , BiVO 4 , and ZnFe 2 O 4 /BiVO 4 /rGO materials were synthesized using the hydrothermal method in mild conditions to study the oxytetracycline (OTC) degradation process. The results on surface morphology, functional group, structure, and optical and electrochemical characteristics revealed that ZnFe 2 O 4 /BiVO 4 /rGO were successfully prepared with high purity and good distribution of chemical elements. The impact of different parameters like pH, catalyst load, reaction time, initial OTC concentration, and the presence of ozone-nanobubbles on the OTC degradation efficiency was systematically examined to obtain optimal treatment conditions. Synergic effects between ozone-nanobubbles and ZnFe 2 O 4 /BiVO 4 /rGO heterojunction led to an enhancement of over 20 % of OTC degradation yield. The OTC degradation reached 96.3 % within 100 min at optimal conditions (pH 7.0, [Cat.] = 0.5 g/L, and [OTC] = 20 mg/L). The combination of ZnFe 2 O 4 and BiVO 4 allowed to benefit from the generation of both effective electrons and holes, which enhanced the generation rate of both superoxide and hydroxyl radicals responsible for degrading the pollutant in water while rGO sheets contributed to slowing down the recombination rate between electrons and holes and improving the photocatalytic activities of the ZnFe 2 O 4 /BiVO 4 /rGO. Liquid chromatography-mass spectrometry (LC-MS) analyses were deployed to figure out intermediate substances and possible degradation pathways of the OTC degradation process. The ZnFe 2 O 4 /BiVO 4 /rGO heterojunction exhibited a pretty good durability and stability, and was easily recovered with the aid of a magnet. The toxicity of the by-products was significantly declined compared to the OTC antibiotic.
研究领域:
环境科学
·
材料科学
·
微生物学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Guozhen Fang,Xiaowen Ruan,Depeng Meng,Minghua Xu,Chunsheng Ding,Chengxiang Huang,Yu Qiu,Shengli Zhao,Kaikai Ba,Tengfeng Xie,Yong Zhou,Haiyan Zhang,Wei Zhang,Shengye Jin,Jing Leng,Sai Kishore Ravi,Xiaoqiang Cui
The four-electron water oxidation reaction in photoelectrochemical systems poses a major challenge to efficiently converting solar energy into chemical energy amid the global energy crisis. Herein, we report a strategy to develop a photoelectrochemical system using BiVO 4 /Bi 4 V 2 O 10 isometallic heterojunction photoanodes paired with FeOOH/NiOOH cocatalysts to enhance water oxidation in neutral electrolytes. The results demonstrate that the BiVO 4 /Bi 4 V 2 O 10 /FeOOH/NiOOH photoanode achieves a photocurrent density of 4.48 mA/cm 2 at 1.23 V versus the reversible hydrogen electrode and an applied bias photon-to-current efficiency of 1.69 % at 0.63 V versus the reversible hydrogen electrode—significantly outperforming bare BiVO 4 . This enhanced photoelectrochemical performance is attributed to the identical elemental composition and well-aligned energy band positions of Bi 4 V 2 O 10 and BiVO 4 , which minimize charge recombination at the interface. Additionally, the FeOOH/NiOOH double-layer cocatalyst facilitates rapid transfer of photogenerated carriers, as confirmed by femtosecond transient absorption spectroscopy and transient photovoltage measurements. This approach provides a novel and effective pathway for advancing high-efficiency photoelectrochemical cells.
研究领域:
材料科学
·
能源科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）