MATERIALS RESEARCH BULLETIN
·
2019
·
IF 3.355
Xiaofeng Hu,Jisong Hu,Qingqi Peng,Xinguo Ma,Shijie Dong,Huihu Wang
In this work, a special hybrid structure with 2D configuration comprising of g-C 3 N 4 , reduced graphene oxide (RGO), and BiOI (g-C 3 N 4 /BiOI/RGO) was rationally constructed and immobilized on Ni foam with RGO functioned as electron transfer mediator and binder. The immobilized 2D g-C 3 N 4 /BiOI/RGO hybrid structure exhibited the enhanced photocatalytic CO 2 reduction to CO and the methyl orange (MO) degradation efficiency under visible light irradiation. Particularly, the hybrid heterojunction with a mass ratio 6% of BiOI to g-C 3 N 4 displayed the highest CO yield and degradation rate constant for MO, which was 1.6 times and 3 times of g-C 3 N 4 /RGO binary heterojunction immobilized on Ni foam. The enhanced photocatalytic activity was ascribed to the rapid charge separation. More importantly, combined with the theoretical calculations on the work functions of g-C 3 N 4 , rGO and BiOI, the experimental results clarified the charges transfer route of g-C 3 N 4 /BiOI/RGO heterojunction conforming to the Z-scheme mechanism.
研究领域:
材料科学
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环境科学
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光催化
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2017
·
IF 3.359
Yang Liu,Hongguang Guo,Yongli Zhang,Xin Cheng,Peng Zhou,Gucheng Zhang,Jingquan Wang,Peng Tang,Tingling Ke,Wei Li
This study represents the first investigation on the application of persulfate (PS)/vis-light for the degradation of Rhodamine B (RhB) using bismuth oxyiodide magnetic composites (BiOI/Fe 3 O 4 , BOMCs). The 3D flower sphere-like BOMCs were successfully fabricated via a hydrothermal method, proving to be an excellent photocatalyst under visible light when evaluated by various characterization methods. The results demonstrated that BOMCs had a high photodegradation efficiency at pH 3.0–9.0 and the BiOI/Fe 3 O 4 (5:1) composite displayed the optimal catalytic performance. Inorganic ions such as Cl − showed promotion at a lower concentration, while significant inhibition was observed for higher concentrations of Cl − and HCO − 3 in the Vis/BOMCs/PS process due to the quenching effect. Moreover, 44.9% mineralization efficiency for total organic carbon and the excellent stability of BOMCs were demonstrated with limited iron leaching. Based on the scavenger experiments, the photocatalytic mechanism in the coupled system determined· SO − 4 and OH as the main reactive species. Eventually, the major intermediates are detected by GC/MS, and a possible photocatalytic degradation pathway of RhB is proposed in the Vis/BOMCs/PS process.
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 HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Lifang Fan,Guifang Liang,Caiyun Zhang,Li Fan,Wenjun Yan,Yujing Guo,Shaomin Shuang,Yingpu Bi,Feng Li,Chuan Dong
In this work, a visible-light-driven photoelectrochemical (PEC) sensing platform was developed based on BiOI nanoflowers/TiO 2 nanotubes (BiOI NFs/TiO 2 NTs) for detection of atrazine (ATZ). The BiOI NFs/TiO 2 NTs p–n heterojunctions synthesized by decorating BiOI NFs on TiO 2 NTs via simple hydrothermal approach exhibit strong visible-light absorption ability, high photocurrent response and PEC activity. Thus BiOI NFs/TiO 2 NTs heterostructures were first explored to act as the photoelectrode for the immobilization of the anti-ATZ aptamer to develop a PEC sensing platform. The design PEC aptasensing platform exhibits prominent analytical performance for determination of ATZ with a low detection limit of 0.5 pM under visible-light irradiation, and displays good selectivity for ATZ in the control experiments. The superior behavior of the sensing platform could be ascribed to the design of the appropriate sensing material with tubular microstructure, excellent PEC response of the photoelectrode, and the large loading amount of aptamer. Meanwhile, the PEC sensing platform was used to determine ATZ in environmental samples and a satisfied result was obtained.
研究领域:
分析化学
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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
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Yundong Zeng,Yunlan Xu,Dengjie Zhong,Haoyang Yao,Nianbing Zhong
The development of traditional photocatalytic fuel cell (PFC) is severely hindered by poor visible-light response and limited reaction space. In this study, a visible-light responsive PFC with g-C 3 N 4 /BiOI/Ti photoanode was proposed and applied to activate peroxymonosulfate (PMS) to degrade rhodamine B. The degradation rate, maximum power density and maximum photocurrent density of the PMS/PFC system were respectively 95.39%, 103.87 μW cm −2 and 0.62 mA cm −2 , which was respectively 1.28, 2.18, and 1.98 times that of PFC. The excellent performance is attributed to the production of more reactive oxygen species and the extension of the reaction space range after the activation of PMS. The activation pathway of PMS and charge transfer pathway of the photoanode were discussed in detail, and it was proposed that PMS was activated by Z-scheme heterojunction g-C 3 N 4 /BiOI/Ti photoanode.
研究领域:
环境科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 37
·14829-14840
·
IF 3.069
Jianhui Li,Quan Zhou,Fan Yang,Lijie Wu,Wenying Li,Ruipeng Ren,Yongkang Lv
The binary BiOBr/BiOI composite photocatalysts with different molar ratios obtained via a simple one-step solvothermal method were investigated by using XRD, Raman spectroscopy, SEM, EDS, TEM, HR-TEM, BET, UV-vis DRS and PL. The degradation efficiency of uniform flower-like BiOBr/BiOI (3 : 1) is best when the samples were used to degrade RhB solution under visible light irradiation, which is attributed to its uniform particle distribution and the largest specific surface area of 44.21 m2 g−1. Compared with the previously synthesized BiOBr/BiOI, the morphology and specific surface area of BiOBr/BiOI (3 : 1) have obvious advantages. The influence factors (pH, NO3−, Cl− and HCO3−) on the photocatalytic performance of BiOBr/BiOI (3 : 1) were explored. The recycling experiments demonstrate that BiOBr/BiOI (3 : 1) composite maintains high photocatalytic activity after eight recycling experiments, and its crystal structure and morphology do not change. In addition, a possible degradation mechanism was also ascertained by radical capture experiments, EPR and semiconductor structure analysis. All results suggest that the uniform flower-like BiOBr/BiOI (3 : 1) composite with high photocatalytic degradation efficiency, excellent recyclability and stability has promising application potential for the photocatalytic degradation of organic compounds in wastewater.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Bei Long,Xiaojie Liang,Yong Pei,Xiongwei Wu,Xianyou Wang,Man-Kay Law
Photo-rechargeable batteries can implement solar energy harvesting and storage simultaneously and have attracted strong interest from researchers. The development of photoactive electrodes is the key to promoting the development of high-performance photocells. Herein, a free-standing BiOI@MWCNTs film is developed as photoelectrode to achieve the effective separation of photogenerated electron-hole pairs for high-efficiency solar-electric-chemical energy conversion. Light can charge up photocells with a photoconversion efficiency of ∼1.3 %, as well as accelerate charge transfer without requiring any external bias voltage. Ex situ XRD and XPS tests prove that the enhanced electrochemical reaction kinetics can improve the chemical-electric energy conversion efficiency under illumination. The capacity of the proposed photocell can be increased by 10.6 % (from 195 mA h g –1 to 216 mA h g –1 at 0.2 A g –1 ) and 57.9 % (from 76 mA h g –1 to 120 mA h g –1 at 5.0 A g –1 ) in light condition, while exhibiting a cyclic life of up to 600 cycles. This work can help to deepen the understanding of photo-rechargeable batteries.
研究领域:
材料科学
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电化学
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能源存储
·
太阳能
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 11
·116513
·
IF 4.316
Yuanyuan Jiang,Rajesh Pathak,Tiansheng Zhang,Haibin Xu,Xiaoyi Li,Ronghua Jian,Fan Wu
The solution-processed TiO2/BiFeO3/BiOI ternary heterojunction with cascade energy level alignments was developed for photoelectrochemical conversion, in which, BiOI was deposited on BiFeO3 sensitized TiO2 mesoporous film by spin-coating method. BiFeO3 as ferroelectric material was served here as a mediator for improvement of charge separation and transfer. The photocurrent generation in TiO2/BiFeO3/BiOI sample are very stable, even measured after 50 light on/off cycles with 2000 s. Moreover, compared with the TiO2/BiOI film, TiO2/BiFeO3/BiOI film showed about twice as high photocurrent density and photocatalytic activity. Kelvin probe force microscope showed that the surface potential of TiO2/BiFeO3/BiOI film was 0.456 V, which was obviously larger than 0.226 V in TiO2/BiOI sample. The increased surface potential should originate from the polarization electric-field Eself by BiFeO3 interlayer, in which the direction of electric-field was directed toward the BiOI. The presence of Eself consequently resulted in the better dissociation of photo-generated electrons and holes. Charge transport dynamics suggested that charge transfer rate increased from 6.813 s−1 of TiO2/BiOI heterojunction to 22.280 s−1 of TiO2/BiFeO3/BiOI heterojunction, and surface charge recombination rate reduced from 10.305 s−1 of the TiO2/BiOI to 7.707 s−1 of TiO2/BiFeO3/BiOI heterojunction, which results in the enhanced photoelectrochemical conversion in TiO2/BiFeO3/BiOI heterojunction.
研究领域:
材料科学
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光电化学
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纳米技术
·
能源材料
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2014
·
IF 1.968
Yunfang Chen,Jianzhang Fang,Shaoyou Lu,Yan Wu,Dazhi Chen,Liyan Huang,Weicheng Xu,Ximiao Zhu,Zhanqiang Fang
In this work, a new plasmonic photocatalyst Ag/AgI/BiOI-rectorite was prepared via a cation exchange process. The photocatalyst had been characterized by X-ray powder diffraction (XRD), Raman spectra, nitrogen sorption (BET), field-emission scanning electron microscope (FE-SEM), X-ray photoelectron spectroscopy (XPS) and UV–vis diffuse reflectance spectroscopy (DRS). The photocatalytic activity, which was evaluated by degradation of rhodamine B (RhB) and bisphenol A (BPA) under visible light irradiation, was enhanced significantly by loading Ag/AgI/BiOI nanoparticles onto rectorite . The photogenerated holes and superoxide radical ( O 2 − ) were both formed as active species for the photocatalytic reactions under visible light irradiation. The existence of metallic Ag particles, which possess the surface plasmon resonance effect, acted as an indispensable role in the photocatalytic reaction.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Qianqian Ni,Huiping Shao,Yun Zhang,Xin Ke,Wengang Liu
Oxygen vacancies could be induced into the heterojunction structure of BiOI/BiOBr via high-temperature calcination. Light absorption, charge transfer efficiency, photocatalytic activity, and mechanism are all intimately connected to oxygen vacancies. Density-functional theory simulations demonstrate that surface oxygen vacancies adsorb oxygen to active sites, whereas bulk oxygen vacancies activate oxygen adsorbed to the surface to reactive radicals. Meanwhile, the addition of oxygen vacancies efficiently reduces the effects of background ions and pH on tetracycline breakdown in the real aquatic environment. The experimental results are consistent with the DFT calculations. This paper presents a straightforward approach for creating heterojunction surface and bulk-phase oxygen vacancies, as well as an understanding of the many roles that different types of oxygen vacancies play in the photocatalytic degradation process.
研究领域:
环境科学
·
材料科学
·
光催化化学
·
水污染治理
·
计算化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Meiting Li,Bingxin Yuan,Chi Zhang,Jia Li,Xuejiao Wang
Hierarchical BiOCl/BiOI and BiO(Cl,I) photocatalysts were obtained via a solution-phase reaction for visible-light-driven elimination of aqueous pollutants, where the phase/morphology evolution, relationship between energy band/microstructure structure and photocatalytic properties, and photoreaction mechanism can be deciphered in detail. It was well-documented that the R = 8:1 BiOCl/BiOI heterojunctions with a coherent interface of Bi and O atoms showed a relatively strong redox capacity owing to their rapid Z-scheme charge transfer and large interfacial contact and eventually degraded ∼92.52% and 96.57% of rhodamine B (RhB) and tetracycline (TC) molecules under 10 min of visible light irradiation, which was larger than those of bare BiOCl and BiOI. However, their poor photocatalytic stability was proved to be unfavorable to practical applications. The best BiOCl0.88I0.12 solid solutions separately elucidated the optimal RhB and TC removal efficiency of ∼99.97% and 97.54% after 10 and 6 min of illumination, and it still maintained a high photodegradation efficiency toward RhB after five consecutive runs. The exceptional photocatalytic performance is cogoverned by the characteristics of in situ generated oxygen vacancies and defect energy levels.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Pengfei Yu,Yuyin Wu,Anqi Liu,Mati Ullah Khan,Jun Yang,Jiaqi Cui,Shun Wang,Jiawen Liu,Anqi Chu,Ling Kong,Zhiwei Chen
Ochratoxin A (OTA) is a kind of mycotoxin. It widely exists in all kinds of mammals and has teratogenicity and cytotoxicity. In this paper, a label-free photoelectrochemical (PEC) aptamer sensor based on bismuth oxyiodide/cadmium tungstate (BiOI/CdWO 4 ) was designed to detect OTA. The BiOI/CdWO 4 heterojunction is an excellent optoelectronic active material with remarkable chemical stability. AgNO 3 and Na 2 S were selected to grow in situ to form Ag 2 S quantum dots, which were sensitized to enhance the absorption of visible light and promote the generation of photocurrent. In this system, with the increasing of OTA concentration, the photoelectric signal intensity reduces as the specific binding with aptamer. When the concentration of OTA is between 0.01 ng/mL and 50.00 ng/mL, the linear equation is I (μA) = 48.95 – 10.276 lg c ( c OTA , ng/mL), R 2 = 99.281, and the detection limit is 0.823 pg/mL. The newly designed PEC aptamer sensor has exceptional stability, sensitivity, and reproducibility, making it capable of detecting OTA effectively and sensitively.
研究领域:
食品安全检测
·
分析化学
·
生物传感技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2012
·
IF 4.173
Xin Xiao,Rong Hao,Min Liang,Xiaoxi Zuo,Junmin Nan,Laisheng Li,Weide Zhang
Three-dimensional (3D) BiOI/BiOCl composite microspheres with enhanced visible-light photodegradation activity of bisphenol-A (BPA) are synthesized by a simple, one-pot, template-free, solvothermal method using BiI 3 and BiCl 3 as precursors. These 3D hierarchical microspheres with heterojunction structures are composed of 2D nanosheets and have composition-dependent absorption properties in the ultraviolet and visible light regions. The photocatalytic oxidation of BPA over BiOI/BiOCl composites followed pseudo first-order kinetics according to the Langmuir–Hinshelwood model. The highest photodegradation efficiency of BPA, i.e., nearly 100%, was observed with the BiOI/BiOCl composite (containing 90% BiOI) using a catalyst dosage of 1 g L −1 in the BPA solution ( C 0 = 20 mg L −1 , pH = 7.0) under visible light irradiation for 60 min. Under these conditions, the reaction rate constant was more than 4 and 20 times greater than that of pure BiOI and the commercially available Degussa P25, respectively. The superior photocatalytic activity of this composite catalyst is attributed to the suitable band gap energies and the low recombination rate of the photogenerated electron–hole pairs due to the presence of BiOI/BiOCl heterostructures. Only one intermediate at m / z 151 was observed in the photodegradation process of BPA by liquid chromatography combined with mass spectrometry (LC–MS) analysis, and a simple and hole-predominated photodegradation pathway of BPA was subsequently proposed. Furthermore, this photocatalyst exhibited a high mineralization ratio, high stability and easy separation for recycling use, suggesting that it is a promising photocatalyst for the removal of BPA pollutants.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）