INORGANIC CHEMISTRY COMMUNICATIONS
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2024
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IF 4.4
Yongyu Li,Yaping Wang,Zhengkang Zhu,Shenshen Shi,Xinyi Ma,Jianjun Chen,Haijie Sun,Lingxia Chen
Ternary-component BiOBr/Bi/BiOI composites were successfully prepared by a one-step hydrothermal method under the reducing effect of ascorbic acid. Ascorbic acid not only converts Bi 3+ to Bi 0 as a reducing agent, but also inhibits the growth of grains and controls the morphology, resulting in a multilayered hierarchical floral structure of the BiOBr/Bi/BiOI composites formed by the assembly of nanosheets dotted with nanoparticles on the surface. The composite has highest photocurrent density, lowest photogenerated electron-hole recombination rate and high specific surface area, and exhibits excellent degradation performance for both single and mixed pollutant systems of tetracycline, rhodamine B and methylene blue. h + is the most dominant reactive oxygen species in the photodegradation process, while ·OH and ·O 2 − provide weak auxiliary degradation. A Z-scheme photocatalytic degradation mechanism of BiOBr/Bi/BiOI with excellent photocatalytic performance was proposed.
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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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Li Lin,De Yu,Lin Xu,Yi Huang,Manhong Huang,Hossein Kazemian
An advanced oxidation process was developed under LED blue light (BL) photocatalysis in the presence of ammonium persulfate (APS) for effective degradation of tetracycline (TC) from contaminated water . Waste rock wool (RW) fibers modified with BiOBr nano-sheet (BiOBr/RW) using impregnation combined with hydrolysis process, was employed to activate APS to produce reactive radicals under LED BL irradiation (BiOBr/RW+APS+BL system). The influence factors on TC degradation were investigated. Besides, the radical scavengers such as methanol (MA), phenol (PN), tertbutanoland (TBA) and ethylene diamine tetraacetate (EDTA-2Na) combined electron spin paramagnetic resonance (EPR) analysis were used to confirm the reactive radical species. The developed BiOBr/RW+APS+BL system exhibited much higher TC removal efficiency compared with other reported oxidation systems. In addition, the BiOBr/RW could directly activate the APS leading to degrade TC in the darkness. A maximum TC removal of 84.3% was achieved under the optimal conditions such as initial concentration of APS 100 mg/L, BiOBr/RW dosage 0.1 g/L and pH 7 in 80 min. Results also ascertained that h + , •OH and •SO 4 - over surface of the BiOBr/RW were the primary active chemical species in the BiOBr/RW+APS+BL system. It was found that the •OH and •SO 4 - in solution play critical roles for degradation of TC on the BiOBr/RW+APS system in dark. Finally, the repeated experiments indicated the excellent stability, photocatalytic ability and cycling property of BiOBr/RW.
研究领域:
环境科学
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光催化材料
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2019
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IF 5.107
Lulu Zhang,Xiuping Yue,Jianxin Liu,Junqiang Feng,Xiaochao Zhang,Changming Zhang,Rui Li,Caimei Fan
BiOBr-based composite photocatalysts had attracted extensive attention for efficient photocatalytic degradation aqueous organic pollutants in the past decade. However, the catalysis ability of photocatalyst is greatly limited by their intrinsic high recombination rate of photo-generated charge carriers. Herein, we solve this problem by constructing a novel 2D/3D Bi 5 O 7 Br/BiOBr heterojunction photocatalyst that was prepared via one-step facile hydrolysis process. The pure Bi 5 O 7 Br and pure BiOBr photocatalysts were also obtained by only adjusting the pH value of the mixed solution. The obtained products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), optical and electric property analysis and etc. The results suggested that 2D Bi 5 O 7 Br nanosheets tightly attached to the surface of BiOBr 3D structure with nanoflakes self-assembled microsphere , which could increase the transfer and separation efficiency of photogenerated charges. Furthermore, the 2D/3D Bi 5 O 7 Br/BiOBr heterojunction exhibited superior visible light photocatalytic performance for carbamazepine (CBZ) degradation than pure BiOBr and pure Bi 5 O 7 Br, which owing to the enhanced separation of photoinduced electrons and holes. At last, the underlying photocatalytic mechanism is elucidated based on the band structure and radical scavenging experiments. This work provided a feasible design idea to one-step construct 2D/3D nanocomposite for pharmaceutical wastewater purification.
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
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yan Feng,Yue Tao,Jianhua Qu,Ying Zhang
A remediation strategy for polycyclic aromatic hydrocarbons (PAHs) in soil was proposed that combined soil washing (SW) and photocatalytic oxidation. In this study, naphthalene (2-ring Nap), phenanthrene (3-ring PHE), and pyrene (4-ring Pyr) served as model pollutants. We assessed the efficacy of Triton X-100 (TX-100) in desorbing PAHs from contaminated soil and its impact on subsequent photocatalytic degradation. TX-100 achieved desorption efficiencies of 72.1% for Nap, 63.3% for PHE, and 52.1% for Pyr during SW. The desorption process of PAHs from soil showed strong closely dependent on TX-100 concentration. Furthermore, a BiOBr/g-C 3 N 4 -30% (BOB/CN-30%) photocatalyst was employed to decompose PAHs in both synthetic and real SW effluents. Quenching experiments and electron paramagnetic resonance (EPR) spectroscopy confirmed the generation of active species (h + , OH, and O 2 − ) in the BOB/CN-30% system. Based on the photocatalytic treatment of PAHs in the synthetic SW effluent, the reactivity impact of TX-100 on PAH degradation by BOB/CN-30% depended on the TX-100 concentration. Optimal TX-100 levels enhanced PAH solubilization and decomposition, whereas excessive concentrations formed dense micelles that obstructed PAH degradation. Moreover, the coupled system exhibited efficient recirculation in real SW tests, underscoring its potential as a remediation option for PAHs-contaminated soils.
研究领域:
环境科学
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化学工程
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污染治理
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产品关联
DOI
高影响因子
Journal of Cleaner Production
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2024
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IF 9.7
Xuemeng Tian,Yue Wang,Sameer Hussain,Ruquan Shen,Ying Sheng,Ruiqi Yang,Lisa D. Pfefferle,Ruixia Gao
In this work, we presented a versatile “one-stone-two-birds” strategy to directly introduce the imprinted cavities into BiOBr/polydopamine composite (BD-MIP) for selective removal of target contaminants from water. BD-MIP exhibited a superior adsorption capacity which is 3.49-times higher than that of the non-imprinted composite, due to the imprinted cavities in polydopamine . BD-MIP showed an improved photogenerated carriers’ behavior, with a superior photodegradation rate of 96.6% in 30 min, excellent selectivity with coefficients above 2.53, and good reusability. All imprinted composites, including BD-MIPs for different templates and MIPs in different BiOBr-based composites, demonstrated greater degradation efficiency than their corresponding non-imprinted composites. This work suggests that the proposed strategy is versatile for selective removal of contaminants, offering flexibility with BiOBr/composites and confirming its potential as an intelligent, eco-friendly, and adjustable method for contaminant removal from water.
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 CATALYSIS B-ENVIRONMENTAL
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2015
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IF 7.435
Peng Yi-Zhu,Ma Wan-Hong,Jia Man-Ke,Zhao Xiao-Rong,David M. Johnson,Huang Ying-Ping
In this study, a weakly polar pesticide acetochlor in water was tried to degrade by BiOBr catalysts under visible light irradiation. Its degradation reaction rate increased exponentially with increasing catalyst dosage, which was significantly different from conventional photocatalytic patterns established for polar or water-soluble pollutants. Thus, the rate-dosage relationship of BiOBr/acetochlor was compared to that of BiOBr/Rhodamine B (RhB) (a typical strong polar dye pollutant in water) at different BiOBr dosages. The degradation rate of RhB increased with the BiOBr dosage and then plateaued due to more catalyst particles blocking the light into the inner solution, which is a typical behavior for heterogeneous photocatalysis of polar organic compounds in aqueous solution. While acetochlor behaved differently, its degradation rate increased exponentially with the BiOBr dosage, and no plateau was observed even up to 9.0 g/L BiOBr dosage. This special rate-dose relationship for weakly polar acetochlor was correlated with a unique adsorption property of BiOBr to acetochlor in water solution. There was a re-distribution effect that always exclude excessive acetochlor adsorbed on BiOBr surface regardless either substrates or BiOBr overdose. This finally resulted in every BiOBr particle having enough adsorption sites available for dissolved dioxygen to function thereby accelerate the degradation of weakly polar organic compounds in water.
研究领域:
环境化学
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光催化
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水污染控制
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环境功能材料
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污染物降解机制
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DOI
高影响因子
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
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2021
·Vol. 129
·期 12
·731-738
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IF 1.224
Ruirui LIU,Qi ZHAO,Zhijiang JI
Ternary Au/Bi2WO6/BiOBr composites were skillfully prepared via a two-step synthetic route. The two-component Bi2WO6/BiOBr heterojunction was firstly fabricated by hydrothermal method, and Au nanoparticles (NPs) were further introduced and uniformly anchored on the surface of Bi2WO6/BiOBr, where the loaded Au NPs could be beneficial for improving visible-light absorption and adjusting photoinduced charge carriers in the heterostructure through surface plasmon resonance (SPR). In comparison with pristine Bi2WO6 and two-component Bi2WO6/BiOBr, the ternary Au/Bi2WO6/BiOBr composite exhibits a better photocatalytic activity for removal of rhodamine B (RhB) under visible light irradiation. The degradation efficiency of GTB-3 composite 1.9 times higher than that of the pure Bi2WO6 and 1.24 times than that of Bi2WO6/BiOBr. Trapping tests with different scavengers revealed that not hydroxyl radicals but superoxide radicals and photogenerated holes were highly responsible for the degradation process. The enhanced photocatalytic activity was ascribed to the synergetic effect of heterojunction effect (efficient separation of charge carriers), porous structure of Bi2WO6 (strong adsorption), SPR of Au.
研究领域:
材料科学
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化学
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环境科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2019
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IF 5.155
Meirun Li,Chi Song,Ying Wu,Min Wang,Zhepeng Pan,Yang Sun,Liang Meng,Shuguang Han,Lijie Xu,Lu Gan
In the present study, a novel visible-light Z-scheme photocatalyst based on BiOBr/CoFe 2 O 4 /graphene ternary structure was prepared through a hydrothermal approach. The morphology and structure of the prepared photocatalyst were characterized, and the optical properties of the photocatalyst were investigated as well. Afterwards, the photocatalytic performance of the Z-scheme photocatalyst were evaluated through degrading rhodamine B dye and reducing Cr(VI) under visible light irradiation. Compared with pure BiOBr and BiOBr/CoFe 2 O 4 binary composites, the prepared BiOBr/CoFe 2 O 4 /graphene ternary exhibited higher photo-degradation and photo-reduction efficiency. It was also found that the holes were the main active species which were generated during the photocatalysis process. Due to the existence of conductive graphene, the photo-generated active species could be effectively stabilized and quickly transferred. Moreover, the prepared photocatalyst showed very promising recyclable stability, in which the photocatalytic performance of the composites barely decreased after five consecutive circles. The present study provides a new insight in designing and constructing high-efficient and recyclable photocatalyst for aqueous pollutant removal.
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
CHEMOSPHERE
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2023
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IF 8.8
Kai Wang,Xiaojiao Yu,Zongbin Liu,Ting Zhang,Yao Ma,Jinfen Niu,Binhua Yao
Constructed heterojunction has been considered an efficient strategy to enhance the migration and transfer of photoinduced charge carriers. Herein, a Z-scheme Cu 2 O/BiOBr heterojunction with 0D/2D structure was fabricated by microwave hydrothermal method. It was found that the optimal composites photocatalyst showed excellent activity for sulfamethoxazole (SMZ) illumination, and the removal rate reached 90.7%, which was higher than pristine Cu 2 O (53.0%) and BiOBr (60.0%). Subsequently, the operational parameters such as catalyst dosage, concentrations of pollutants, and pH of solution were investigated. According to the ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRs), Mott-Schottky curve, and density functional theory (DFT) analysis, the Z-scheme degradation mechanism of Cu 2 O/BiOBr heterostructure was proposed. Among them, the interface structure of 0-dimensions/2-dimensions (0D/2D) can significantly increase the number of heterojunctions in the composite catalyst, and Z-scheme heterostructures can accelerate the generation and migration of photoinduced charge carriers, which has a facilitation effect on improving the decomposition activity of the photocatalyst. Moreover, three possible pathways for SMZ degradation were inferred. This study provides a promising strategy for constructing novel heterojunctions with high photocatalytic performance.
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
ACS Applied Materials & Interfaces
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2018
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IF 8.097
Haijin Liu,Cuiwei Du,Meng Li,Shengsen Zhang,Haokun Bai,Lin Yang,Shanqing Zhang
The establishment of p–n heterojunction between semiconductors is an effective means to improve the performance of semiconductor photocatalysts. For the first time, we synthesize SnO2/BiOBr heterojunction photocatalysts using a one-step hydrothermal method. Systematic material characterizations suggest that the photocatalysts consist of irregular BiOBr nanosheets with the length about 200 nm and width about 150 nm, and SnO2 nanoparticles are anchored uniformly onto the nanosheets. Most importantly, electrochemical characterizations including transient photocurrent profiles and electrochemical impedance spectra suggest that SnO2/BiOBr heterojunctions are created, which facilitates the charge separation and transfer efficiency of photogenerated charge carriers. As such, SnO2/BiOBr photocatalysts exhibit remarkable photocatalytic activities in terms of degrading a series of organic pollutants. Radical trapping experiments and electron spin resonance spectra suggest that superoxide radicals (•O2–) and hydroxyl radicals (•OH) are primary medium species running through the photocatalytic degradation process and enhanced photocatalytic performance.
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 ALLOYS AND COMPOUNDS
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2017
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IF 3.133
Xue Yu,Peiwen Wu,Caixia Qi,Junjie Shi,Lijuan Feng,Chunhu Li,Liang Wang
Tremendous demands for photocatalysts with high chemical activity and stability, low cost and capability of response to visible-light have stimulated intensive research on developing versatile materials with special photocatalytic applications. Here we report a novel g-C 3 N 4 /BiOBr-RGO aerogel ternary-component heterojunction photocatalyst for degradation of RhB under visible light irradiation. As a result of synergistic effect of the g-C 3 N 4 , BiOBr and RGO, the hybrid photocatalysts exhibit better activity than the single component catalysts (pure g-C 3 N 4 , BiOBr) and bi-component catalysts (g-C 3 N 4 /BiOBr) in the same time period (60 min). The enhanced photocatalytic performance originates from a novel nanoarchitecture in which BiOBr exposed more active plane and RGO worked as a conductive support further improved the photogenerated charge separation. Moreover, due to the 3D structure of RGO after reaction the photocatalysts can be easily removed from the treated solution and reused, which opens up a way for the recycling applications of catalysts in aqueous reaction systems.
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
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Ming Liu,Aikun Liu,Hongjian Zhang,Shuxuan Li,Yong Zhang
The coupling effect of piezo-photocatalytic technology is well demonstrated as a promising strategy for effective degradation of organic pollutants. However, the catalytic efficiency is dramatically limited by the undesirable neutralization of photogenerated electron-hole pairs. Herein, PVDF@Bi 2 MoO 6 /BiOBr heterojunction was designed elaborately to boosting their piezo-photocatalytic activity by built-in polarization field and controlled carrier transfer. The composite film presents excellent degradation performance of methyl orange (MO, 15 mg/L) (98.99%, 120 min) under the simultaneous ultrasonic vibration and visible light irradiation, which is around 2 and 3.1 times than that of individual piezoelectric and photocatalytic process. The improved piezo-photocatalytic capability could be attributed to the enhanced built-in piezoelectric field that generated by the vibration of p-type BiOBr nanosheets . The construction of piezoelectric polarization reduces the recombination efficiency of photogenerated carriers at the p-n heterojunction interface, thereby dramatically improving the catalytic efficiency. This work proposes and demonstrates the very positive role of dual piezoelectricity in modulating the photocatalytic efficiency in semiconductors, which provides a new paradigm for the further development of highly-efficient piezo-photocatalysts to be applied in environmental purification and wastewater treatment.
研究领域:
材料科学
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环境科学
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催化技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）