APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Yu Guan,Jiang Wu,Yuyu Lin,Qizhen Liu,Yongfen Qi,Weiguo Pan,Ping He,Xuemei Qi,Run Wang,Zhonghao Ji
The ternary complex photocatalysts of BiOIO 3 /g-C 3 N 4 /MoS 2 by solvent-exfoliation method was synthesized for the first time. In the typical procedure, the BiOIO 3 /g-C 3 N 4 was obtained via hydrothermal synthesis technique, and then the BiOIO 3 /g-C 3 N 4 /MoS 2 photocatalysts were prepared via ultrasonic solvent-exfoliation method from bulk commercial MoS 2 in the alcohol solution. The samples of BiOIO 3 /g-C 3 N 4 /MoS 2 were analyzed by PL , XRD and other characterization analysis methods. The photocatalytic activity of the as-prepared samples was investigated by removing gas phase mercury irradiation under visible light . The as-prepared BCM-0.3 exhibits excellent photocatalytic performance, being with the highest efficiency of 70.58%. Owing to the electronic channels of field-effect, an internal electric field was formed through the corresponding band-gap engineering, improving photocatalytic reaction. Besides, the excellent activity of the ternary photocatalysts BiOIO 3 /g-C 3 N 4 /MoS 2 is attributed to heterostructure between BiOIO 3 /g-C 3 N 4 and MoS 2 , which enlarges spectral response and improved separation efficiency of charge carriers, and MoS 2 -composing, which provides more active sites for catalytic oxidation . In addition, the as-prepared samples with excellent photocatalytic performance also offer a perspective insight into the hydrogen evolution , CO 2 conversion and degradation of organic pollutants.
研究领域:
材料科学
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环境科学
·
化学
·
光催化
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产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2023
·
IF 5.4
Xin Yang,Zhaopeng Zhang,Jiang Wu,Zhengrong Zhu,Tao Zhang,Ping He,Yongfeng Qi,Shang Xiang,Mengjie Bai,Xingyue Qi
Construction of heterojunction and formation of oxygen vacancy are effective methods to improve the performance of photocatalysts. In this work, Er 3+ -doped BiOIO 3 /g-C 3 N 4 photocatalyst with oxygen-rich vacancies was prepared by a simple hydrothermal and calcination method for the photocatalytic oxidation of elemental mercury. The structural properties of BiOIO 3 /g-C 3 N 4 /Er 3+ were analyzed by XRD, SEM and BET. The results showed that all samples exhibited good photocatalytic oxidation ability for Hg 0 under visible light irradiation. Among them, the photocatalyst with Er 3+ -doped BiOIO 3 /g-C 3 N 4 and then calcined has the highest removal efficiency of Hg 0 , which is 68.83%. This may be due to the increase of oxygen vacancy caused by Er 3+ doping, which enables the photocatalyst to have higher electron transfer rate and wider visible light absorption range. Finally, the possible mechanism of photocatalytic oxidation of gaseous elemental mercury with BiOIO 3 /g-C 3 N 4 /Er 3+ photocatalyst was proposed. This study provides some reference for the design and application of photocatalysts containing oxygen vacancies.
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 COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Beibei Wang,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jinghui He,Jianmei Lu
We report an unique 2D/2D Iodine doped BiOIO 3 /g-C 3 N 4 heterojunction was successfully prepared. The iodine doped BiOIO 3 was prepared by a simple solvent exchange method and combined with g-C 3 N 4 by solvothermal method . The prepared photocatalyst has potential application value in the future due to its excellent stable cycle property. BiOIO 3 nanoplates and g-C 3 N 4 nanosheets form a close interfacial contact directly, so the catalyst has higher charge transport efficiency and wide visible range due to the introduction of iodide ions. Synergistic heterojunction exhibits strong photocatalytic activity for degradation of NO at ppb-level under visible light , of which 30% Iodine doped BiOIO 3 /g-C 3 N 4 can achieve a maximum removal rate of 57% for NO. According to the experimental results of ESR and other experiments, a more complex Z-scheme photocatalytic mechanism is proposed, which has stronger redox ability than the traditional mechanism.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Xia Zhang,Daolei Wang,Xiaokun Man,Jiang Wu,Qizhen Liu,Yongfeng Qi,Zhiqiang Liu,Xiaoyan Zhao,Jiaxi Wu,Chenyu Hao
The morphology of catalyst is a very important factor influencing the photocatalytic activity of the catalyst. Owing to its scientific and technological importance, controllable preparation of photocatalysts with different morphologies has been studied. In this work, BiOIO 3 /g-C 3 N 4 heterojunction composites are synthesized using hydrothermal method and the composites with different morphologies are fabricated by adjusting the amount of NaOH in precursor solutions to control the growth of BiOIO 3 crystal plane. The physicochemical properties of BiOIO 3 /g-C 3 N 4 heterojunction composites were investigated by XRD, XPS, FTIR, SEM, TEM, HRTEM, BET, UV–vis DRS and PL characterization. The effect of the BiOIO 3 morphology on the photocatalytic efficiency of BiOIO 3 /g-C 3 N 4 heterojunction composites was evaluated by photocatalytic removal of gas-phase Hg 0 under visible light irradiation. When the morphology of BiOIO 3 is regular square-like, BiOIO 3 /g-C 3 N 4 has the optimal removal efficiency 92.6% of Hg 0 . Finally, electron-hole migration path and photocatalytic mechanism of catalysts are proposed.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2023
·
IF 4.3
Qingyun He,Shanxi Gong,Qinghua Liang,Zhifeng Liu,Binbin Shao,Ting Wu,Yuan Pan,Xiansheng Zhang,Miao He,Lin Ge,Jingwen Sun
A novel Schottky heterojunction was obtained by co-calcining fish-scale tubular carbon nitride (FTCN), V-BiOIO 3 and Tungsten carbide (WC) for photocatalytic degradation of tetracycline hydrochloride (TCH). The novel Schottky heterojunction has been analyzed by several characterizations and experiments. The case of photocatalytic degradation was studied for different initial concentrations, electrolyte and pH, respectively. The experiments have indicated that the V-BiOIO 3 /g-C 3 N 4 /WC performed an excellent activity of photocatalytic for TCH degradation (89.0%). In the mechanism analysis, we first deduce that the V-BiO3/FTCN compound belongs to the S-scheme heterojunction photocatalysts based on the properties of the band gap structure, which can effectively suppress recombination of joint carriers. Secondly, the introduction of the cocatalyst WC formed Schottky junction, which could play a role as an electronic library to trap e − and promote the separation of photo-induced carrier and thus maximize the strong oxidation ability of h + . In addition, the introduction of WC could also significantly enhance the optical absorption properties of the composites. This research could provide a new idea for the construction of novel and efficient carbon nitride-based photocatalysts under VSL (visible light), and promote its practical application in environmental remediation.
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 CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2022
·Vol. 97
·期 5
·1326-1335
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IF 3.709
Dandan You,Ming Li,Zhuren Pan,Zhenyang Yin,Ning Wang
BACKGROUND 2,4-Dichlorophenol (2,4-DCP) is widely used as a preservative, pesticide, germicide, etc. However, it is very damaging to organisms and the environment, and it is difficult to decompose because of its high stability. To improve the photocatalytic ability of photocatalysts for degrading hazardous substances, like 2,4-DCP, constructing heterojunction is an effective strategy because of its restraint of electron–hole recombination and extension of light absorption spectra. RESULTS A novel photocatalyst Bi 7 O 9 I 3 /BiOIO 3 /g-C 3 N 4 was successfully synthesized by one-step in-situ co-crystallization method. The formation of Bi 7 O 9 I 3 /BiOIO 3 /g-C 3 N 4 composite was confirmed by X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS), fourier transform infrared spectrometer (FTIR spectrometer) and transmission electron microscope (TEM). The obtained optimal composite exhibited an excellent photocatalytic performance of degrading 2,4-DCP with an efficiency of 95% under visible-light irradiation. The trapping experiments indicated that superoxide radicals, electrons, and singlet oxygen played vital roles in 2,4-DCP decomposition and confirmed the dual Z-scheme heterojunction structure of Bi 7 O 9 I 3 /BiOIO 3 /g-C 3 N 4 . Furthermore, the possible reaction pathway was deduced based on the trapping experiments and the intermediate products detected by liquid chromatography tandem mass spectrometry. CONCLUSION The photocatalytic performance of Bi 7 O 9 I 3 /BiOIO 3 /g-C 3 N 4 was enhanced because the more efficient separation and transfer of photogenerated charge carriers was achieved due to the formation of dual Z-scheme heterojunction. This work presented a simple and feasible synthesis method to prepare a ternary photocatalyst for improving the photocatalytic ability, and it can assist in further understanding the reaction mechanism of 2,4-DCP degradation. © 2022 Society of Chemical Industry (SCI).
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）