INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
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IF 3.573
Ganhua Qiu,Ting Wang,Xiaoli Li,Xueqin Tao,Benxia Li
A heterostructure photocatalyst consisting of BiOCl nanoplates and a bismuth-organic hybrid layer (alias BiCl3Br–CTA) was synthesized through a one-step solvothermal process. The BiOCl/BiCl3Br–CTA heterostructures exhibited broad light absorption and enhanced electron–hole separation efficiency. Moreover, the abundant oxygen vacancies (OVs) and superoleophilic surface endowed the photocatalyst with high abilities for adsorption and activation of O2 and toluene. Therefore, the BiOCl/BiCl3Br–CTA photocatalyst showed excellent activities for the C(sp3)–H bond oxidation of toluene under full-spectrum irradiation and visible light of simulated sunlight, which are 6.8-fold and 237.8-fold, respectively, than those of BiOCl nanoplates. The photocatalytic mechanism was revealed by a series of controlled experiments and in situ ESR detections. The selective oxidation of toluene was promoted by the synergy between the electrons in BiOCl for activating O2 and the holes in the BiCl3Br–CTA layer for activating the C(sp3)–H bonds. This research demonstrates an effective strategy to construct high-activity photocatalysts for challenging organic transformations.
研究领域:
材料科学
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环境科学
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催化化学
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DOI
高影响因子
Micro & Nano Letters
·
2017
·Vol. 12
·期 12
·1020-1023
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IF 0.723
Feifan Xu,Gang Cheng,Yi Wei,Rong Chen
BiOCl/Bi 2 S 3 hollow hybrids were synthesised through a mild anion-exchange method from BiOCl microspheres and thiacetamide. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, nitrogen adsorption measurements, ultraviolet–visible–near-infrared diffuse reflectance spectra, photocurrent, and electrochemical impedance spectroscopy (EIS) were employed to study the composition, structure, and properties of the as-synthesised BiOCl/Bi 2 S 3 hybrids. Compared to pure Bi 2 S 3 and BiOCl products, the as-prepared BiOCl/Bi 2 S 3 hollow hybrids exhibited superior capability for photocatalytic reduction of hexavalent chromium under vis light irradiation. The photocurrent and EIS results demonstrated that the low recombination rate of photoinduced electron–hole pairs was contributed to the enhanced photoreduction activity.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 10
·4894-4903
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IF 8.867
Weiqiang Fan,Chunfa Li,Hongye Bai,Yanyan Zhao,Bifu Luo,Yongjun Li,Yilin Ge,Weidong Shi,Hongping Li
This paper presents for the first time a novel method of depositing plasmonic Bi nanoparticles on BiOCl nanosheets (Bi/BiOCl) via insitu photoelectroreduction, and Bi/BiOCl as the photocathode enabled solar water splitting in a TiO2–Bi/BiOCl photoelectrochemical (PEC) system. It is one of the challenges to understand the relationship between the PEC performance and the composite ratio of Bi/BiOCl, and the density functional theory calculation results show that charges obviously transfer from the Bi cluster to the BiOCl (001) surface. The structure of Bi/BiOCl photocathode has been successfully optimized, according to the current–potential curves and charge injection efficiency. The highly enhanced PEC activity could be attributed to the dual roles of Bi nanoparticles in enhancing the charge transfer and surface plasmon resonance (SPR) effect. More importantly, the optimal Bi/BiOCl photocathode achieved a solar hydrogen evolution rate of 2.4 µmol h−1 under full spectrum illumination (100 mW cm−2).
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
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
·
IF 4.175
Yang Zhao,Hui-Long Wang,Hui-Ping Qi,De-Ying Zhao,Xin-Kui Wang
Based on the superior photocatalytic activity of low crystalline BiOCl (LCB) and temperature responsive character of poly( N -isopropylacrylamide) (PNIPAM), the novel BiOCl/GO@PNIPAM photocatalyst (PGOB) was successfully synthesized in this work by employing LCB as a photocatalytic core material, graphene oxide (GO) as a carrier for LCB, and PNIPAM as a thermo-sensitive shell material of the photocatalyst. Compared with the high crystalline BiOCl nanoplates (NPB), the core material LCB in PGOB exhibited superior photocatalytic activity and could be prepared simply by a mannitol complexation-assisted method under ambient conditions without any post-treatment. The interactions between mannitol and bismuth caused changes in chemical environment of bismuth in LCB. The morphology, crystallization, structure features and chemical compositions of the as-prepared samples were investigated by various techniques. The results showed that the prepared PGOB sample exhibited good temperature-responsive performance, excellent adsorption capacity and superior photocatalytic activities, the higher activity of which could be attributed to the effective separation and longer survival of the photogenerated carriers.
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
MICROCHIMICA ACTA
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2024
·Vol. 191
·期 12
·1-10
·
IF 5.3
Yu Pengfei,Li Meixin,Wang Shun,Li Shanshan,Cui Jiaqi,Yang Jun,Liu Shuang,Kong Ling,Chen Zhiwei
Fumonisin B 1 (FB 1 ) is a mycotoxin mainly found in corn, peanuts, and wheat crops, which affects human health. Based on bismuth sulfide/bismuth oxychloride (Bi 2 S 3 /BiOCl) composite material, silver sulfide (Ag 2 S) was grown in situ as a quantum dot sensitization signal, and a photoelectrochemical (PEC) aptasensor was designed by layer upon layer modification to detect FB 1 . Bi 2 S 3 /BiOCl has a wide range of visible light absorption, stable chemical properties, and a simple synthesis method. In the construction process, L-ascorbic acid (AA) is selected to provide electrons and inhibit photogenerated electron-hole (e - /h + ) recombination. Under the optimal experimental conditions, the detection range of the fabricated PEC aptasensor was 0.001 ~ 100 ng/mL, and the detection limit was 0.016 pg/mL. The prepared PEC aptasensor has high sensitivity, stability, and reproducibility. The combination of aptamer and PEC sensor provides a novel method for the application of PEC sensor in mycotoxin detection. Graphical
研究领域:
食品科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
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2024
·
IF 5.7
Deng Ding,Xin Liu,Jiwen Chen,Ruina Xuan,Weifeng Peng,Liye Zhu,Xiaofang Li,Ya Sun,Chunlei Wang,Bo Chai,Juntao Yan,Zhuo Jiang
The photocatalytic activity of promising layered structure BiOX (X = Cl, Br, I) is limited by the low carrier mobility and charge transfer based on heterojunction . Hereon, we reported that Bi 2 O 2 Se with the same layered structure, high carrier mobility and broad spectrum absorption was used to composited with BiOCl to obtain effective layer to layer interfacial charge transfer and high photocatalytic activity under visible light . Bi 2 O 2 Se/BiOCl were synthesized via ion exchange method in precursor of Bi 2 O 2 Se. 25-Bi 2 O 2 Se/BiOCl shows the optimal photocatalytic removal activity of methyl blue (MB) and Cr (VI), which was higher than that of pure BiOCl and Bi 2 O 2 Se. The analysis of morphology revealed the in-growth mechanism of Bi 2 O 2 Se/BiOCl. A strong interaction between the same layer structure Bi 2 O 2 Se and BiOCl was proved by detailed analysis of XPS and valence charge density. Transient photocurrent responses and energy-level indicated the sensitized electrons of Bi 2 O 2 Se can be injected into BiOCl effectively and produce H 2 O 2 . We believe layer structure Bi 2 O 2 Se can be candidate co-catalyst to expand photocatalytic activity of layer structure semiconductor catalysts in the visible and infrared regions , especially, for the same layered bismuth compounds .
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Chunping Su,Mengxi Cheng,Hong Gao,Jun Li,Rong Chen
A superhydrophilic/underwater superoleophobic BiOCl/Bi 2 O 3 coated mesh was successfully prepared through a facile one-step hydrothermal method, which exhibits outstanding mechanical stability against sandpaper friction and resistance to water erosion and corrosive liquids. Notably, it demonstrates excellent oil/water separation efficiency and photocatalytic performance under visible light irradiation while preventing the adhesion of microorganisms to the coating surface, endowing anti-biofouling properties to the mesh. To achieve simultaneous separation of oil from water as well as degradation of soluble dye and bacteria pollutants in a single device, a superhydrophobic/superoleophilic BiOCl/Bi 2 O 3 coated mesh was also prepared using surface modification with octadecanethiol. Subsequently, a dual-layer mesh (DLM) was obtained by overlaying the superhydrophilic BiOCl/Bi 2 O 3 coating onto the superhydrophobic BiOCl/Bi 2 O 3 coating. The resulting dual-layer mesh with its superwetting properties enables concurrent oil–water separation, photodegradation of organic contaminants and photocatalytic bactericidal activity within trapped sewage. Furthermore, this versatile BiOCl/Bi 2 O 3 coated mesh can serve as a template for fabricating other bismuth-containing micro/nanostructure coatings with remarkable wetting properties. It is anticipated that such a versatile BiOCl/Bi 2 O 3 coated mesh possessing superior superwetting properties, robust mechanical durability, excellent anti-biofouling properties and outstanding photocatalytic activity will find promising applications in complex oily sewage purification systems.
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
NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 6
·2898-2907
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IF 3.925
Juan Qiu,Yingdi Wang,Xiang Liu
We synthesized a CuBi2O4/BiOCl p–n heterojunction photocatalyst by a convenient one-pot hydrothermal method. And the morphology, crystal phase, element composition and optical properties of as-synthesized CuBi2O4/BiOCl were analyzed utilizing SEM, EDS, TEM, XRD, XPS, UV-visible DRS, PL and EIS techniques. Under visible light, the CuBi2O4/BiOCl p–n heterojunction exhibits excellent photocatalytic activity for the degradation of tetracycline hydrochloride, and when the CuBi2O4 content in the heterojunction is 20 wt%, the photocatalytic activity of the CuBi2O4/BiOCl heterojunction is the highest, which is 58.2 times and 4.1 times that of pristine CuBi2O4 and BiOCl, respectively. The photocatalytic activity of the heterojunction increased with the enhancement of visible light absorption and the effective separation of photogenerated electron–hole pairs which is promoted by the built-in electric field. In addition, a radical trapping study showed that h+ and ˙O2− radicals were the main active species in the photocatalytic process. On this basis, the possible photocatalytic mechanism was discussed.
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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2021
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IF 19.503
Lingsong Wang,Huanshun Yin,Suo Wang,Jun Wang,Shiyun Ai
Bi/BiOCl/Bi 2 O 2 CO 3 heterojunction was prepared via one-step hydrothermal process under the synergistic catalysis of Ni 2+ , where Bi(NO 3 ) 3 was employed as Bi source, DMF was used as carbon source and reductant, NiCl 2 was adopted as Cl source and co-catalyst. The content of Bi, BiOCl and Bi 2 O 2 CO 3 can be adjusted by changing the reaction time, temperature, content of DMF and NiCl 2 . The doping of Bi enhanced the photocatalytic activity of BiOCl/Bi 2 O 2 CO 3 under visible-light. Bi/BiOCl/Bi 2 O 2 CO 3 presented photo-degradation activity for environmental pollutants of rhodamine B, sunset yellow and tetracycline, which were 13.01, 9.40, 1.50 times and 168.38, 10.90, 4.75 times higher than BiOCl and Bi 2 O 2 CO 3 , respectively. The improved photocatalytic activity was ascribed to the sensitized effect of Bi and BiOCl, the surface plasmon resonance effect and the heterojunction structure, which inhibited the recombination of photogenerated electron-hole pairs. The degradation mechanism for rhodamine B was discussed, and the decreased toxicity of the degradation products was demonstrated.
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
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
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IF 4.1
Xian-De Zhou,Yong-Hui Tian
Biomass is a natural and renewable carbon resource. One of the possible green approaches to “carbon neutrality” is catalytic conversion of biomass resources into high value-added chemicals. As a result, photocatalytic selective oxidation of the biomass product 5-hydroxymethylfurfural (5-HMF) to 2,5-dicarbonylfuran (DFF) is an ecologically benign and energy efficient method. In this study, 2D g-C 3 N 4 /BiOCl heterostructures composites were prepared by easy ultrasonication-assisted stirring method for the first application of photocatalytic oxidation of 5-HMF to DFF. The physicochemical properties of the synthesized materials were characterized by SEM, XRD, FT-IR, XPS, UV–vis, BET surface area, PL and EPR analysis. The experimental results show that the g-C 3 N 4 /BiOCl composite is superior to pure g-C 3 N 4 and BiOCl in the oxidation of 5-HMF to DFF. The improved photocatalytic performance of the g-C 3 N 4 /BiOCl composites can be attributed to the improved visible light absorption, the creation of compact and intact Z-type heterojunction, increased surface area and enhanced separation efficiency of photogenerated electron-hole pairs. In addition, the photocatalyst has high stability and reusability. A putative photocatalytic process is proposed based on the respective energy band locations of these two semiconductors.
研究领域:
化学工程
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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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Yanjie Han,Zhijia Zhu,Chunyan Hu,Jian Zheng,Baojiang Liu,Wei Wang
In this study, a novel three-dimensional, flower-like Cu-BiOCl/Bi 2 S 3 photocatalyst was synthesized using a two-step calcination and hydrothermal method , aiming at the efficient removal of tetracycline (TC). Through comprehensive characterization techniques, it was discerned that the incorporation of Cu ions extended the light absorption range of BiOCl. Additionally, the formation of a heterojunction significantly enhanced the separation efficiency of space charge. The unique three-dimensional flower-like architecture of the Cu-BiOCl/Bi 2 S 3 photocatalyst augments its surface area exposure and consequently, the density of active sites. This catalyst exhibited a remarkable degradation rate of approximately 95% for TC under visible light irradiation. This performance exhibits a notable enhancement over the degradation rates of BiOCl and Bi 2 S 3 , which are approximately 39% and 53% respectively, surpassing them by factors of 2.39 and 1.78. Electron spin resonance (ESR) analysis coupled with free radical trapping experiments pinpointed superoxide radicals (•O 2 - ) and photogenerated holes (h + ) as the pivotal active species orchestrating the photocatalytic degradation. Concludingly, a possible TC degradation pathway was proposed based on the intermediates generated during the photocatalytic reaction as detected by Liquid Chromatograph Mass Spectrometer (LC-MS) and Three-Dimension Excitation Emission Matrix (3D EEM).
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 ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Dongfeng Sun,Min Zhang,Luo Huang,Yanning Qu,Yuan Yu,Beibei Lou,Huayun Du,Bingshe Xu,Kai Wang
One-pot in-situ method was one of crucial industrial techniques to construct heterojunctions , while some intermediate reaction mechanisms of photocatalysts in this procedure were not specific enough. Herein, a new intermediate products driven one-pot in-situ method was investigated for construction of BiOCl/WO 3 that applied in photocatalytic water splitting. According to some characterizations, the hydrochloric acid and water were recognized as important intermediates controlling on growth of BiOCl/WO 3 heterojunction. Under significant effects of Z-scheme structure and internal electric fields, the BiOCl/WO 3 showed enlarged light absorption and enhanced photo-induced carriers separation ability that its O 2 and H 2 evolution rates were improved effectively, in which the optimal photocatalytic O 2 (994.5 µmol/g∙h) and H 2 evolution activity (83.4 µmol/g∙h) were ∼ 2.5 and 4.5 times higher than that of the single BiOCl , respectively. Due to compact interfacial connection between BiOCl and WO 3 after in-situ synthesis, the heterojunction showed a high stability and recyclability for potential industrial applications. We believe that the facile synthetic method was essential for more researches on heterojunction materials and their industrial 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
危险品化学品经营许可证（带存储）