JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2019
·Vol. 30
·期 19
·18246-18258
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IF 2.195
Yu Zongxue,Feng XiaoFang,Min Xia,Li XiuHui,Shao LiangYan,Zeng HaoJie
In the study, the reduced graphene oxide/graphitic Bi 12 O 17 Cl 2 –TiO 2 heterojunctions sheet membrane(RGO/PDA/Bi 12 O 17 Cl 2 –TiO 2 ) was fabricated by the dopamine modification and assembling the RGO/PDA/Bi 12 O 17 Cl 2 –TiO 2 composites on the surface of commercial CA(cellulose acetate) membrane to degrade methylene blue (MB) and p-chlorophenol (4-CP) to harmless products. These membrane materials were comprehensively characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and UV–vis diffuse reflectance spectra (DRS). The results showed that RGO/PDA/Bi 12 O 17 Cl 2 –TiO 2 nanofiber membrane exhibited extremely high degradation performance with a good distribution of RGO/PDA/Bi 12 O 17 Cl 2 –TiO 2 on the CA nanofiber membrane surface. Besides, the complete photodegradation of 100 mL MB (15 mg L −1 ) solution and 100 mL 4-CP (15 mg L −1 ) solution with artificial visible-light was achieved after 100 min and 160 min, respectively. The RGO/PDA/Bi 12 O 17 Cl 2 –TiO 2 -CA composite membrane revealed the ability of continuous and simultaneous flow-through separation of oil/water emulsion and degradation of soluble organic dye under visible-light irradiation in a short time. Moreover, the nanofiber membranes exhibited excellent stability and reusability for MB-containing oil–water mixed emulsion separation has great potential to be applied in industrial application.
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 Environmental Sciences
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2022
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IF 6.796
Yong Wang,Cheng Liu,Haoyun Hu,Qiujun Lu,Haiyan Wang,Chenxi Zhao,Fuyou Du,Ningli Tang
The construction and application of novel highly efficient photocatalysts have been the focus in the field of environmental pollutant removal . In this work, a novel CuFe 2 O 4 /Bi 12 O 17 Cl 2 photocatalysts were synthesized by simple hydrothermal and chemical precipitation method. The fabricated CuFe 2 O 4 /Bi 12 O 17 Cl 2 composite exhibited much higher photocatalytic activity than pristine CuFe 2 O 4 and Bi 12 O 17 Cl 2 in the removal of bisphenol A (BPA) under visible-light illumination, which ascribed to the intrinsic p-n junction of CuFe 2 O 4 and Bi 12 O 17 Cl 2 . The photocatalytic degradation rate of BPA on CuFe 2 O 4 /Bi 12 O 17 Cl 2 with an optimized CuFe 2 O 4 content (1.0 wt.%) reached 93.0% within 30 min. The capture experiments of active species confirmed that the hydroxyl radicals (•OH) and superoxide radicals (•O 2 − ) played crucial roles in photocatalytic BPA degradation process. Furthermore, the possible degradation mechanism and pathways of BPA was proposed according to the detected intermediates in photocatalytic reaction process.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
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IF 7.489
Enhui Jiang,Lili Yang,Ning Song,Xiaoxu Zhang,Chunbo Liu,Hongjun Dong
It is highly desirable to combine the microstructure management and heterostructure construction technique to remold inherent wide band gap semiconductor CaTiO 3 with the purpose of enhancing its visible light absorption capacity and photocatalytic performance. Herein, a novel multi-shelled hollow cube Bi 12 O 17 Cl 2 /CaTiO 3 heterostructure has been successfully synthesized by a facile template-free method for photocatalytic hydrogen production and degradation pollutants in water under the visible light . The investigations of microstructure, physicochemical property and photoelectric behaviors indicate that the multi-shelled hollow cube architecture and synergetic effect of 2D-3D structural coupling are dominant reasons to enhance phototcatalytic performance, which can significantly improve the absorption and utilization of visible light, multiply abundant active radical generation and boost the separation and migration efficiency of photoproduced electron-hole pairs. Moreover, the probable photocatalytic reaction mechanisms, the feasible migration behaviors of photo-produced charges, the influence factors of enhancing photocatalytic activities are proposed in depth. It is intended that further innovative works on the multi-shelled hollow cube architecture design of high-performance photocatalyst by facile template-free hydrothermal method can be inspired.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
RARE METALS
·
2022
·Vol. 41
·期 7
·2405-2416
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IF 6.318
Cui Song-Song,Liu Xuan,Shi Yin-Biao,Ding Ming-Ye,Yang Xiao-Fei
Exploring efficient co-catalysts to accurately steer the charge separation of semiconductor photocatalysts is highly desired yet remains challenging. Here, we tackle the significant challenge by in situ growing the Bi 12 O 17 Cl 2 photocatalyst onto two-dimensional (2D) Cl-terminated Ti 3 C 2 MXene to construct 2D/2D heterojunction of Bi 12 O 17 Cl 2 and Ti 3 C 2 . Firstly, 2D few-layered Ti 3 C 2 MXene with chlorine groups has been successfully synthesized by Lewis acidic etching strategy with subsequent ultrasonic exfoliation. The grafting of chlorine terminations on the surface of MXene serves as nucleating centers and growth platform, resulting in the formation of strong interfacial bonds (Bi–Cl–Ti) between Bi 12 O 17 Cl 2 and Ti 3 C 2 . These strong bonds can facilitate the separation and transfer of photo-generated charge carriers between Bi 12 O 17 Cl 2 photocatalyst and Ti 3 C 2 cocatalyst. As expected, the photocatalytic degradation rate of Bi 12 O 17 Cl 2 /Ti 3 C 2 hybrids is 9.7 times higher than that of bare Bi 12 O 17 Cl 2 nanosheets. This work not only exhibits a new design concept to effectively steer the charge separation for photocatalysis, but also gives a reference for constructing efficient MXene-based photocatalytic systems. Graphical abstract
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Biao Guo,Xianyu Wang,Xia Wu,Xinying Sun,Xinyuan Li,Xinxin Liu,Lijing Zhou,Zhen Zhao
The construction of S-scheme heterojunctions with oxygen vacancies (OVs) is an effective strategy to enhance the photocatalytic activity. In this pioneering study, we successfully fabricated Bi12O17Cl2/Bi2S3 S-scheme heterojunctions with abundant OVs (ROV-BOC/BS) using an anion exchange method. The in situ growth of Bi2S3 (BS) nanorods on OVs-rich Bi12O17Cl2 (ROV-BOC) nanosheets resulted in an interconnected reticulated structure. This structure not only increased the specific surface area of the composite but also established a tightly bound heterojunction, further enhancing the OVs content in the composites. The OVs-induced defect levels provide additional channels for photogenerated charge migration. The synergy between the heterojunction and OVs improved the light absorption and carrier separation efficiency. Consequently, the optimized ROV-BOC/BS-0.1 achieved 95.52% Cr(VI) removal efficiency within 120 min, with apparent reaction rate constants 5.39 and 23.86 times higher than those of pure ROV-BOC and BS, respectively. This investigation provides crucial guidance for designing novel S-scheme heterojunction photocatalysts with abundant OVs.
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
ACS Applied Nano Materials
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2024
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IF 5.3
Yong Wang,Shikai Xue,Yuhao Liao,Qiujun Lu,Haiyan Wang,Chenxi Zhao,Ningli Tang,Fuyou Du
Photocatalytic degradation of pollutants is an attractive method to handle environmental pollution issues. Here, Bi12O17Cl2 photocatalysts were synthesized facilely by hydrolyzed bismuth-based metal organic framework (Bi-BTC) precursors, and their thickness was adjusted by controlling the hydrolysis time. Under visible light irradiation, MOF-derived Bi12O17Cl2 nanoflakes fabricated by this strategy exhibited higher photocatalytic activity in the degradation of bisphenol A (BPA) and tetracycline hydrochloride (TCH) than the conventional Bi12O17Cl2 materials prepared by hydrothermal and chemical precipitation, which could reach up to 94.3 and 92.2% within 60 min under optimal conditions. The inhibition experiments and electron spin resonance (ESR) confirmed that superoxide radicals (·O2–) were the main active species for photodegradation activity. Furthermore, the possible degradation pathways of BPA and TCH were proposed according to the detected intermediates by LC-MS. At the same time, this method has been extended to synthesize Bi5O7I and Bi12O17Br2 materials, providing a strategy for the fabrication of bismuth-rich bismuth oxyhalide materials in environment treatment.
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
NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 8
·3727-3737
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IF 3.925
Zhujun Huang,Dongying Zhu,Haiyan Wang,Jinhua Luo,Chenxi Zhao,Fuyou Du
Developing excellent photocatalysts for pollutant degradation is of vital significance but still a big challenge. In this work, an electrospun g-C3N4/Bi12O17Cl2/poly(acrylonitrile-co-maleic acid) (E-spun g-C3N4/Bi12O17Cl2/PANCMA) nanofiber photocatalyst was fabricated by coaxial electrospinning of g-C3N4/Bi12O17Cl2 and PANCMA and showed high adsorption capacity and excellent visible light catalytic degradation performance with the adsorption amount and degradation rate of antibiotic ofloxacin (OFL) as high as 4.44 mg g−1 within 6 min and 94% within 20 min, respectively. Compared to pure g-C3N4 and Bi12O17Cl2, the g-C3N4/Bi12O17Cl2 heterojunction showed higher visible light absorption and degradation ability, ascribed to the synergistic effect of g-C3N4 and Bi12O17Cl2 on the separation and utilization efficiency of photogenerated electron–hole pairs. E-spun g-C3N4/Bi12O17Cl2/PANCMA nanofibers exhibited highly efficient photocatalytic activity over a wide pH range of 4.0–8.0 and some interference of metal ions and inorganic anions, and the reactive species including holes (h+), superoxide radicals , and hydroxyl radicals (˙OH) all participated in the photocatalytic degradation of OFL. Moreover, the E-spun g-C3N4/Bi12O17Cl2/PANCMA possessed excellent cycling stability of 81.9% efficiency retention after fifteen consecutive tests. In addition, the possible degradation mechanism, intermediate products and degradation pathways of OFL were investigated by ESR tests, radical scavenger experiments, and LC-MS analysis. This study developed a feasible exemplificative strategy for fabricating new highly efficient and reusable photocatalyst candidate materials to remove environmental pollutants.
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 Environmental Chemical Engineering
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2025
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IF 7.2
Yanbing Liu,Ting Zhou,Mingyang Li,Meng Ye,Jianjian Yi,Binxian Gu,Qingsong Hu
In recent years, the development of catalysts with high spatial separation efficiency of photoinduced carriers and molecular oxygen activation has received extensive attention. In this research, a simple solvothermal method was employed to prepare Bi 12 O 17 Cl 2 nanosheets modified with different concentrations of tea biomass carbon quantum dots (T-BCDs), and the morphology, structure and photo-electrochemical characteristics of the as-prepared catalysts were explored in detail. The tea biomass quantum dots adopted a green synthesis strategy. The method converts waste into high-value biomass carbon quantum dots, thereby enabling sustainable use of resources. T-BCDs can store and transfer photogenerated electrons, which can accelerate photoinduced carrier migration and charge separation, boost molecular oxygen activation, and enhance photocatalytic activities. Among which, Bi 12 O 17 Cl 2 loading with 2 mL T-BCDs displays significantly enhanced photocatalytic performance towards the removal of antibiotics under visible and near-infrared light irradiation. In addition, microbial toxicological experiments show that the toxicity of the degradation products is significantly reduced. Superoxide radicals (•O 2 - ) and holes (h + ) are determined to be the major reactive species in photocatalytic reactions. Finally, a viable photocatalytic mechanism is put forward. This study provides a promising strategy for the development of wide-spectrum responsive catalyst in the field of environmental purification.
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
APPLIED CATALYSIS B-ENVIRONMENTAL
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2015
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IF 7.435
Guangping He,Chunlan Xing,Xin Xiao,Ruiping Hu,Xiaoxi Zuo,Junmin Nan
Novel three-dimensional flower-like Bi 12 O 17 Cl 2 /β-Bi 2 O 3 composites are prepared using a facile solvothermal-calcining process and their photocatalytic performances for the degradation of 4- tert -butylphenol (PTBP, a representative alkylphenol) are evaluated under visible light irradiation. The formation of such composites is assumed to involve the reduction of Bi(III) to nano-metallic bismuth via a solvothermal process, followed by the reaction of bismuth with oxygen and bismuth oxide chloride hydroxide during the calcination in air. The XRD, XPS, EDS mapping, HRTEM, UV–vis DRS, and photocurrent measurement results indicate that heterojunctions are formed between Bi 12 O 17 Cl 2 and β-Bi 2 O 3 with broad contact interfaces. The as-synthesized Bi 12 O 17 Cl 2 /β-Bi 2 O 3 hybrid materials possess favorable band structures, heterojunction structures, relatively high specific surface areas, and hierarchical micro/nano-structures, resulting in superior photocatalytic and mineralization efficiencies for the decomposition of PTBP under visible light irradiation. The optimum photocatalytic activity of a Bi 12 O 17 Cl 2 /β-Bi 2 O 3 sample is approximately 3, 12, 51, and 107 times higher than the activities of single β-Bi 2 O 3 , Bi 12 O 17 Cl 2 , nitrogen-doped TiO 2 , and BiOCl, respectively. In addition, the photogenerated reactive species are identified based on free radicals trapping experiments and EPR analysis, which reveals that the photodegradation of PTPB over Bi 12 O 17 Cl 2 /β-Bi 2 O 3 under visible light is dominated by direct hole and superoxide radical oxidation rather than oxidized by hydroxyl radical.
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
CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Enhui Jiang,Ning Song,Xiaoxu Zhang,Lili Yang,Chunbo Liu,Hongjun Dong
It is highly desirable to develop an in-situ fabrication route by facile pH control strategy to prepare Z-scheme heterostructure photocatalyst for producing more firm and intimate interfacial interaction, which will be in favor of removing pollutants in water under the visible light. Herein, the new highly-efficient visible-light-driven Z-scheme Bi 3 O 4 Cl/Bi 12 O 17 Cl 2 heterostructure is prepared by in-situ growth method and this research explores a novel pathway to interconvert Bi 12 O 17 Cl 2 and Bi 3 O 4 Cl by facile pH control strategy. The Z-scheme Bi 3 O 4 Cl/Bi 12 O 17 Cl 2 heterostructure exhibits splendid universal photocatalytic degradation activities to degrade various pollutants under visible light irradiation. The Z-scheme heterostructure and the strong interfacial coupling effect produced by in-situ growth of Bi 3 O 4 Cl on the surface of Bi 12 O 17 Cl 2 are the main reasons to enhance photocatalytic performance. Furthermore, the possible photocatalytic reaction mechanisms including migration and transport behaviors of charge carriers, generation process of reactive species and degradation intermediate products of 2, 4-dichlorophenol are revealed in depth. This proposes a novel design concept to prepare highly-efficient, stable and visible-light-driven Z-scheme photocatalyst, which is expected to be widely applied for the universal removal of multiple pollutants in wastewater efficiently.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2021
·
IF 3.764
Qi Li,Zi-han Yue,Yi-lei Li,Ying-juan Hao,Xiao-jing Wang,Ran Su,Fa-tang Li
Adjusting the surface/interface of photocatalysts to promote molecular oxygen activation is a valid way to ameliorate photocatalytic performance. In this work, dual-defective Al2O3/Bi12O17Cl2 heterostructured photocatalysts are in situ constructed using the ionic liquid self-combustion method. The electron paramagnetic resonance (EPR) test confirms the existence of oxygen vacancies in both Al2O3 and Bi12O17Cl2, and there is defect coupling enhancement effect after their combination. X-ray photoelectron spectroscopy (XPS) further reveals defect signals of AlOx and oxygen vacancies. The O2-temperature-programmed desorption (TPD) experiment shows that defective Al2O3 greatly enhances the adsorption of molecular oxygen. Moreover, diffuse reflectance spectrum (DRS), electrochemical tests, and Kelvin probes are implemented to confirm that the introduction of Al2O3 into Bi12O17Cl2 not only significantly enhances the separation efficiency as an active support but also promotes the defect amounts and molecular oxygen adsorption. Moreover, 1.75 Al2O3/Bi12O17Cl2 (molar ratio of A12O3 to Bi12O17Cl2 is 1.75) exhibits the highest photocatalytic oxidation capability, and its degradation performance for tetracycline hydrochloride is 1.49 times that of Bi12O17Cl2. This work reports the one-step synthesis of Al2O3 and Bi12O17Cl2 with oxygen vacancies, discovers the synergetic enhancement of defects, and reveals the dual-functional roles of defective Al2O3 in strengthening molecular oxygen adsorption and charge separation.
研究领域:
材料科学
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光催化
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环境化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Pengfei Zhu,Xiaolong Wu,Xingyang Xiao,Ming Duan,Dan Luo,Jinru Lin
In this work, Bi 12 O 17 Cl 2 and ZIF-8 were synthesized via a facile in-situ precipitation method, while ZnO-CN was obtained through the pyrolysis of ZIF-8. Then, a novel Bi 12 O 17 Cl 2 /ZnO-CN composite catalyst with Z-scheme heterojunction was prepared by mechanical mixing-low temperature activation method. When the ZnO-CN is pyrolyzed at 550 ℃ and accounts for 10 wt% in the Bi 12 O 17 Cl 2 /ZnO-CN composite, the composite exhibited a significantly higher degradation rate for levofloxacin hydrochloride (LVX) (94.50%) compared to Bi 12 O 17 Cl 2 (67.30%) and ZnO-CN (36.80%), while also achieving a high removal rate of Cr(VI) under acidic conditions (92.00%). And the toxicity of LVX to wheat decreased significantly after photocatalytic degradation. Meanwhile, the Bi 12 O 17 Cl 2 /ZnO-CN has good universality, salt resistance and reuse stability. The experimental results of sample characterization show that the improved photocatalytic performance of Bi 12 O 17 Cl 2 /ZnO-CN composite can be attributed to the high-efficiency separation of electron-hole pairs (e - -h + ), enhanced light absorption in the visible region, increased specific surface area and active sites. Both the free radical capture experiment and electron paramagnetic resonance (EPR) test indicate that •O 2 - and h + are the primary active species in the process of degrading LVX by Bi 12 O 17 Cl 2 /ZnO-CN. Combined with mechanism exploration experiment and iquid chromatography-mass spectrometry (LC-MS) analysis, a possible direct Z-scheme heterojunction electron transfer mechanism and photocatalytic degradation pathways for LVX was proposed. This work enhances the photocatalytic performance of Bi 12 O 17 Cl 2 and provides an idea for antibiotic or Cr(VI) wastewater treatment.
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
危险品化学品经营许可证（带存储）