JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
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IF 4.1
Ting Lu,Xinyan Xiao,Fei Wang,Xia Cheng,Yu Zhang
A novel BiOBr/Ni-MOF composite was fabricated by in-situ growth of BiOBr nanosheets on Ni-MOF through a convenient precipitation process. The optimal photocatalytic performance was achieved with a Ni-MOF mass content of 45 wt% in the BiOBr/Ni-MOF composite. This composite exhibited remarkable efficiency, degrading 98.33 % of Rhodamine B in 90 min, surpassing the degradation rate constants of pristine BiOBr and Ni-MOF by 4.2 and 160 times, respectively. The superior performance was primarily ascribed to the efficient separation of photogenerated carriers facilitated by the formation of heterojunctions. Additionally, the increased specific surface area and pore structure provided numerous adsorption and active sites. Radical scavenger experiments and electron spin resonance experiments further revealed that O 2 − and h + played crucial roles in the degradation process. Furthermore, the structural properties of the prepared photocatalysts and the effects of different photocatalytic conditions on the degradation of RhB were investigated. This work offers an alternative perspective on the design and fabrication of BiOBr-based composite photocatalysts.
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
APPLIED CATALYSIS B-ENVIRONMENTAL
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2015
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IF 7.435
Dongting Yue,Taiyang Zhang,Miao Kan,Xufang Qian,Yixin Zhao
The sulfur tolerant Mo 3 S 13 2− /BiOBr nanocomposite photocatalysts were facilely fabricated by a hydrothermal method. The characterizations including X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectrometry (EDS), UV–vis diffuse reflection spectroscopy (DRS) and photoluminescence (PL) investigate the structures, elemental composition, morphologies and photocatalytic activities of Mo 3 S 13 2− /BiOBr nanocomposite. The 5.0 wt% Mo 3 S 13 2− /BiOBr composite sample showed highest visible-light-driven photocatalytic activity for decolorization of organic dyes including Rhodamine B (RhB) and sulfure containing methylene blue (MB). The decolorization of RhB was dominated by the direct hole and the generated O 2 − radicals oxidation process . Our 5.0 wt% Mo 3 S 13 2− /BiOBr nanocomposite exhibited comparable photocatalytic activity as the state of art 1 wt% BiOBr/Pt composite for photocatalytic decolorization of RhB. The 5.0 wt% Mo 3 S 13 2− /BiOBr composite possessed better sulfur resistance than 1.0 wt% Pt/BiOBr composite.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2021
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IF 6.789
Yaping Zhang,Peiyu Cao,Xinhua Zhu,Bozhen Li,Yufeng He,Pengfei Song,Rongmin Wang
BiOBr is a kind of promising photocatalyst because of excellent photoelectric separation efficiency and chemical stability. In order to improving practical application performance, a novel BiOBr ultra-thin nano-roundel (BiOBr-nR) was constructed in water-in-oil (WIO) emulsion microspheres , and prepared by hydrothermal reaction . Its specific surface area was increased by changing microtopography and downsizing. After being characterized by FT-IR, X-ray photoelectron spectroscopy (XPS), powder X-ray diffraction (XRD), scanning electron microscope (SEM), Brunauer-Emmett-Teller (BET), UV–Vis diffuse reflectance spectra (UV–Vis DRS) and photoluminescence (PL), it indicated the BiOBr-nR, being doped by C and N, is 4–5 times smaller and thinner than that of conventional BiOBr. It was also found that BiOBr-nR has narrower band gap energy (2.78 eV), excellent photocatalytic activity , significant reusability , and stability. The obtained BiOBr-nR photocatalysts were applied to remove organics. It presented excellent photocatalytic activity, the degradation rate of organics got to 99.2%. The mechanism of photodegradation was investigated, which indicated superoxide radicals and holes play a major role in the degradation of organics. Therefore, BiOBr-nR is a kind of environmentally friendly photocatalyst with stable photocatalytic activity, the removal rate still more than 97% after recycling for 10 times. In summary, we found a novel insight for designing and preparation of efficient and recyclable BiOBr photocatalytic materials, which exhibits high photoresponse for purifying the wastewater.
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 Environmental Chemical Engineering
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2023
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IF 7.7
Xin Fang,Chu-Ya Wang,Long-peng Zhou,Qi Zeng,Heng-Deng Zhou,Qi Wang,Guangcan Zhu
Photocatalytic reduction of CO 2 into valuable resources presents an efficient solution to mitigate the energy crisis and effects of climate change . However, the low efficiency of photocatalytic CO 2 reduction of photocatalysts under visible light irradiation limits their industrial applications. Bismuth oxybromide (BiOBr) is a typical visible-light-driven photocatalyst with an appropriate band gap, but the charge separation efficiency still needs to be improved. In this work, the Au-doped BiOBr nanosheets with enhanced electrochemical characteristics were successfully synthesized through a simple one-step hydrothermal procedure. After Au-doping modification, the charge separation efficiency of BOB-Au-I sample were measured as 2.5 times than that of BiOBr nanosheets. And the BOB-Au-I samples exhibited an outstanding photocatalytic capacity for converting CO 2 to CO with a yield rate of approximately four times higher than that of BOB nanosheets under visible light irradiation. Furthermore, the mechanism of CO 2 reduction was elucidated through in situ Fourier-transform infrared spectroscopy. This study provides a facile method for achieving Au-doping modification of BiOBr nanosheets for efficient reduction of CO 2 .
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
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2017
·Vol. 46
·期 7
·2310-2321
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IF 4.029
Lianwei Shan,Yuteng Liu,Hongtao Chen,Ze Wu,Zhidong Han
We prepared an α-Bi2O3/BiOBr core–shell heterojunction via a facile in situ chemical transformation method. Ultrathin BiOBr nanosheets were observed and these were found to be evenly distributed on the surface of α-Bi2O3/BiOBr by SEM and TEM. The results revealed that the prepared α-Bi2O3/BiOBr photocatalysts were porous, and their specific surface areas were found to be raised on comparing with α-Bi2O3 and BiOBr. In our experiments, the photocatalytic activity of α-Bi2O3 was obviously enhanced when assembling with ultrathin BiOBr compared with α-Bi2O3/BiOBr and the individual phase. It is considered that the surface porous structure increases the specific surface areas, which improved the adsorption characteristics of α-Bi2O3/BiOBr. The suitable band alignment (between α-Bi2O3 and BiOBr) and oxygen vacancy effect can be attributed to the increased photocatalytic activity under visible irradiation.
研究领域:
材料科学
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物理化学
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纳米科技
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催化化学
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
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2024
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IF 1
Hongting Ye,Xiaoxing Zeng,Fei Feng,Yuanhang Li,Xiaofeng Gong
ABSTRACT In this study, novel recyclable composite BiOBr/chitin-Fe 3 O 4 was synthesized by a solvothermal method using magnetic chitin chelating bismuth oxybromide (BiOBr) as precursor. The morphology, structure, photoelectric properties and chemical composition of the obtained samples were explored extensively by various characterization techniques. Due to the introduction of Fe 3 O 4 and chitin, the composite BiOBr/chitin-Fe 3 O 4 has multi-functions in enlarging photo response performance, reducing the band gap, increasing specific surface area and inhibiting recombination rate, which are essential to improve the photocatalytic efficiency. Using ciprofloxacin as target pollutant, the composite showed excellent photocatalytic performance under visible light irradiation, the apparent rate constant value of BiOBr/chitin-Fe 3 O 4 is 5.8 times higher than that of pure BiOBr. The composite BiOBr/chitin-Fe 3 O 4 could be recycled and reused conveniently and effectively, and the catalyst possessed good photocatalytic stability with the degradation efficiency remaining unchanged even after five times circle. The possible degradation mechanism was discussed on the basis of experiments.
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
Polymers
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2018
·Vol. 10
·期 10
·1118
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IF 2.935
Tianhao Jiang,Chaoqun Shang,Qingguo Meng,Mingliang Jin,Hua Liao,Ming Li,Zhihong Chen,Mingzhe Yuan,Xin Wang,Guofu Zhou
Herein, we synthesized BiOBr/ultrathin g-C3N4/ternary heterostructures modified with black phosphorous quantum dots using a simple water bath heating and sonication method. The ternary heterostructure was then used for the photocatalytic degradation of tetracycline in visible light, with an efficiency as high as 92% after 3 h of irradiation. Thus, the photodegradation efficiency is greatly improved compared to that of ultrathin g-C3N4, BiOBr, and black phosphorous quantum dots alone. The synthesized ternary heterostructure improves the charge separation efficiency, thus increasing the photodegradation efficiency. This work provides a new and efficient method for the degradation of antibiotics in the environment.Keywords:BiOBr;ultrathin g-C3N4;black phosphorous quantum dots;photodegradation;antibiotics
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
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2012
·Vol. 2012
·期 15
·2508-2513
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IF 3.049
Guangfang Li,Fan Qin,Hao Yang,Zhong Lu,Hongzhe Sun,Rong Chen
Graphical Well-defined 3D flowerlike BiOBr nanostructures have been successfully synthesized by a facile and fast microwave irradiation method by using cetyltrimethylammonium bromide as both the bromide source and soft template. The as-prepared flowerlike BiOBr nanostructures possess a large surface area and exhibit an excellent removal capacity and fast adsorption rate for Cr VI ions in a wide pH range. A facile and fast microwave irradiation method has been developed to synthesize uniform well-defined 3D flowerlike BiOBr nanostructures through a self-assembly process. Cetyltrimethylammonium bromide (CTAB), which acts as both the bromide source and soft template, plays a critical role in the formation of 3D flowerlike BiOBr nanostructures. Different flowerlike BiOBr nanostructures could be obtained by varying the CTAB concentration. A possible formation process is discussed. The as-prepared flowerlike BiOBr nanostructures possessed a large surface area and exhibited an excellent removal capacity and fast adsorption rate for Cr VI ions in a wide pH range.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2016
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IF 8.328
Xuyang Xiong,Liyong Ding,Qingqian Wang,Yongxiu Li,Qingqing Jiang,Juncheng Hu
A series of BiOBr nanosheets with tunable exposing proportion of (0 1 0) facets had been synthesized. In the synthesis process, different n -alcohols are used, which not only promote the exposure of (0 1 0) facets, but also modulate the size and thickness of these BiOBr nanosheets in a wide range. Furthermore, these nanosheets showed an efficient photodegradation activity for salicylic acid (SA) and Rhodamine B (RhB). By comparison, the sample prepared in n -hexanol possessed the highest photocatalytic activity than those synthesized in n -butanol and methanol, respectively. This excellent photocatalytic activity was attributed to the thin lamellar thickness and the exposure of (0 1 0) facets, which facilitated the separation of photoinduced electrons and holes.
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
·
2025
·Vol. 15
·期 5
·321
·
IF 4.3
Boyang Xu,Jie Chen,Kai Wang,Pengfei Li,Le Kang,Huiling Du,Qianqian Liu,Xiaoqing Lian
The accumulation of organic pollutants and solid waste is one of the major environmental challenges faced globally. Establishing an efficient recycling system for solid waste and designing cost-effective, high-performance photocatalysts are urgent tasks for the removal of organic pollutants from water. This study utilizes coal gangue as the precursor to synthesize a coal gangue-based phosphorus–silicon–aluminum molecular sieve (SAPO-5) via hydrothermal synthesis. The resulting material was then composited with bismuth oxybromide (BiOBr) to form a novel BiOBr/coal gangue-based SAPO-5 nanocomposite. When the mass ratio of BiOBr to coal gangue-based SAPO-5 molecular sieve is 0.3, the synthesized nanocomposite exhibits excellent adsorption and photocatalytic performance for the removal of methylene blue, achieving a removal rate of 97.8% and the mineralization rate of 57.4% within 30 min. The superior performance can be attributed to the optimal pore size, rapid charge transfer rate, and high photogenerated charge density of the BiOBr/coal gangue-based SAPO-5 nanocomposite. The novel BiOBr/coal gangue-based SAPO-5 molecular sieve nanocomposite catalyst presents a new approach for the harmless treatment of organic dye wastewater and the high-value utilization of coal gangue.
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
COMPOSITES COMMUNICATIONS
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2024
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IF 6.5
Xinyue Yang,Yong Li,Deyun Yue,Rui Li,Haojie Song
The construction of ternary heterojunction photocatalysts can achieve multi-gradient transfer of charges and accurate control the position of photogenerated electrons which has received increasing attention. In this paper, NH 2 -MIL-53(Al)@BiOBr@CQDs-10 % (ABCQDs-10 %) was prepared via a facile hydrothermal and chemical synthesis processes. Three-dimensional serration of NH 2 -MIL-53(Al) as a platform for irregular BiOBr nanosheets, CQDs promote interfacial contact and act as electron transport channels between BiOBr and NH 2 -MIL-53(Al) and constitute Z-type heterojunctions with high redox properties. ABCQDs-10 % shows the best photocatalytic removal efficiency (94.24 %) of CIP, the reaction rate constants (0.045 min −1 ) were 1.2 and 64 times higher than BiOBr and NH 2 -MIL-53(Al), respectively. The excellent degradation performance is attributed to the construction of Z-type heterojunction of NH 2 -MIL-53(Al)@BiOBr@CQDs which improve electron-hole separation and transfer efficiency. The main active species was •O 2 - . The photocatalytic activity of ABCQDs-10 % had not obvious loss after cycle experiments and the crystal structure had no significant changes, means high stable photocatalytic activity.
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
JOURNAL OF MOLECULAR STRUCTURE
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2024
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IF 4
Longting Qi,Yujing Xie,Jing Ding,Jinfeng Zhang,Hui Wan,Guofeng Guan
Bi 2 MoO 6 has drawn considerable attention in the field of photocatalysis owing to its excellent visible light response and photo-generated carriers transport ability. However, pure Bi 2 MoO 6 suffers from the limited surface-active sites and poor photogenerated charge separation efficiency, resulting in unsatisfactory photocatalytic performance. Herein, the 2D/2D Bi 2 MoO 6 /BiOBr Z-scheme heterojunction photocatalysts were synthesized by in-situ hydrothermal growth of Bi 2 MoO 6 on BiOBr. The optimized heterojunction catalyst, Bi 2 MoO 6 /BiOBr-40 % exhibited a CH 3 OH yield of 6.21 μmol·g -1 ·h -1 , which was twice that of the pure Bi 2 MoO 6 . Simultaneously, mechanism study by the band potential estimation and electron spin resonance (ESR) analysis evidenced that the enhanced activity was ascribed to the Z-scheme. This unique structure could enhance the spatial separation of electron-hole pairs, remain the strong redox ability. Moreover, the density functional theory (DFT) calculations were carried out to further expose the charge transfer mechanism of composites. This paper provided a novel approach for the design and manufacture of 2D/2D Z-scheme heterojunctions for energy conversion and environmental remediation.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
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