JOURNAL OF HAZARDOUS MATERIALS
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2020
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IF 9.038
Zeqing Long,Guangming Zhang,Hongbiao Du,Jia Zhu,Jinwei Li
Recently, the photocatalytic reduction of Cr(VI) has been extensively studied. Herein, we successfully prepared the BiOBr-Bi 2 S 3 heterojunctions with high photocatalytic Cr(VI) reduction performance using an ion exchange method. The optimal BiOBr-Bi 2 S 3 heterojunction (prepared with BiOBr, pH of 6.0, 2 mmol Na 2 S 2 O 3 ·5H 2 O,) achieved 100% removal of Cr(VI) within 12 min. The performance of photo-reduced Cr(VI) was about 28.9 and 184.6 times higher than that of pure Bi 2 S 3 and BiOBr, respectively. Besides, BiOBr-Bi 2 S 3 heterojunctions had a good adsorption efficiency for Cr(III), suggesting that they could be applied as bifunctional photocatalyst. The formation process and photoelectric properties of the BiOBr-Bi 2 S 3 heterojunctions were revealed by a series of characterizations. In conclusion, this work reported the synergistic effect of adsorption and photocatalysis of the BiOBr-Bi 2 S 3 heterojunctions for Cr removal for the first time, suggesting that the BiOBr-Bi 2 S 3 heterojunctions could act as a novel photocatalytic adsorbent to treat the Cr(VI)-containing wastewater.
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
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2025
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IF 4.6
Kai Li,Xijie Dong,Keliang Pan,Hang Zhang,Jian Yang
Constructing tightly bound and highly dispersed heterointerfaces through epitaxial growth is a promising strategy for enhancing the photocatalytic performance of composite systems. In this study, a three-dimensional (3D) hierarchical flower-like BiOBr/Bi 2 S 3 heterojunction was fabricated via an acid vapor ion exchange method. The highly matched lattice parameters facilitated the transformation of the BiOBr substrate into Bi 2 S 3 through epitaxial growth, while the relatively mild reaction conditions at the gas-solid interface effectively preserved the initial morphological structure of the substrate. Benefiting from the expanded spectral response range, enhanced separation and migration efficiency of photogenerated carriers, and improved light utilization through complex scattering within the hierarchical structures, the BiOBr/Bi 2 S 3 heterojunctions demonstrated exceptional photocatalytic activity in the degradation of Rhodamine B and Tetracycline Hydrochloride, as well as in the reduction of Cr(VI). This strategy not only provides a novel approach for the construction of topological heterojunctions but also holds significant potential as a universal methodology, offering broad prospects for both research and practical applications.
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
SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Jingjing Li,Pengyuan Xiong,Juan Tang,Liping Liu,Shan Gao,Zhiyao Zeng,Haimei Xie,Dianping Tang,Junyang Zhuang
In this work, we present a highly sensitive photoelectrochemical (PEC) sensing platform for malathion (Mal) detection based on the biocatalysis-induced formation of BiOBr/Bi 2 S 3 semiconductor heterostructures (BIFBSH). Initially, a double-stranded DNA consisting of an initiator strand and the anti-Mal aptamer was immobilized on magnetic beads surface. The target Mal could competitively bind with its aptamer and liberate the initiator strand from the double-stranded DNA. Subsequently, the initiator strand triggered a hybridization chain reaction (HCR) to produce a long DNA concatemer containing the sequence of G-quadruplex structure. The DNA concatemer was then endowed with HRP-like activity via the formation of hemin/G-quadruplex complexes and binding with MnTMPyP. The HCR-synthesized HRP-mimicking DNA concatemer (HSHMDC) was employed to catalyze Na 2 S 2 O 3 conversion to H 2 S with the aid of H 2 O 2 . The generated H 2 S could react with BiOBr nanoflowers (BiOBrNFs) modified on an indium tin oxide electrode, resulting in the in situ formation of BiOBr/Bi 2 S 3 heterostructures with enhanced photoelectric conversion efficiency. The BiOBr/Bi 2 S 3 heterostructures could generate a strong photocurrent signal to indicate Mal recognition. Under the optimal conditions, a wide linear range between the Mal concentration and photocurrent intensity (0.001–1000 ng mL −1 ) and a limit of detection (LOD) as low as 0.12 pg mL −1 were achieved.
研究领域:
生物化学
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环境科学
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分析化学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Rui Zhang,Ziyin Chen,Yu Li,Chen Zhao,Lu Cai,Junrong Yu,Ze Yang,Jiacheng Jiang
The unique properties of MOFs make them the best candidates for catalytic and photocatalytic applications. In this research, the NH 2 -UiO-66 material was prepared by solvothermal method , and different content of NH 2 -UiO-66 was added before the composite growth of Bi 2 S 3 and BiOBr nanomaterials to obtain the NH 2 -UiO-66/BiOBr/Bi 2 S 3 ternary composite material. In order to investigate the relationship between the structure and properties of the catalyst, XRD , FT-IR, SEM , HRTEM , UV–vis DRS, XPS and other characterization technologies were used to analyze the structure, morphology, optical properties of the samples, showing that NH 2 -UiO-66/BiOBr/Bi 2 S 3 have been successfully synthesized. Their photocatalytic performance was evaluated based on the photocatalytic degradation of tetracycline hydrochloride and rhodamine B under visible light . The results show that 2% NH 2 -UiO-66/BiOBr/Bi 2 S 3 has better photocatalytic activity than other materials. Moreover, NH 2 -UiO-66/BiOBr/Bi 2 S 3 also demonstrated good photocatalytic reusability and stability. The formation of Bi 2 S 3 and BiOBr heterojunctions and the introduction of NH 2 -UiO-66 with more active sites increase the carrier performance and separation efficiency. Then the valence band and conduction band values of the semiconductor material are calculated through the M-S curve, combined with the forbidden bandwidth deduced by UV–vis DRS and the experimental results of radical trapping, a double Z-type electron transfer mechanism suitable for this system is inferred. Finally, taking RhB as an example, the degradation path of dye pollutants was studied.
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
POLYHEDRON
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2026
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IF 2.8
Meng Lan,Yubo Zhang,Xiaoli Dong,Nan Zheng
The development of flexible membrane-shaped photocatalysts with superior catalytic activity for the treatment of heavy metals in wastewater is of great significance, but it remains an extremely large challenge. In this work, atom co-sharing BiOBr/Bi 2 S 3 Z-scheme heterostructures were constructed in situ on flexible carbon fiber cloth substrate by combining solvothermal and ion exchange method. The prepared CFC/BiOBr/Bi 2 S 3 membrane-shaped photocatalyst exhibits good flexibility, water permeability and retrievability. After adsorption for 1 h and visible-light irradiation for 60 min, controllable and optimized synthesized CFC/BiOBr/Bi 2 S 3 –2 shows exceptional activity towards hexavalent chromium with the removal efficiency of 91%. The excellent reduction performance is attributed to the individual charge transport path of Z-scheme, which provides the driving force for photocarriers transport and excellent redox ability. In addition, the tight interfacial contact between BiOBr and Bi 2 S 3 by sharing bismuth atoms allows for rapid charge transfer and accelerates photogenerated carrier separation. This study provides some constructive insights for developing an immobilized membrane-shaped photocatalyst with excellent photocatalytic activity and easy recovery to treat chrome-containing wastewater, which has a promising application in the field of water remediation.
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DOI
高影响因子
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