NEW JOURNAL OF CHEMISTRY
·
2023
·
IF 3.3
Xiaomeng Liu,Yitian Zhong,Haosheng Feng,Yanxi Zhao,Qin Li,Tao Huang
The AgI/BiOI composites were prepared with BiOI nanosheets as the substrate by in-situ ion exchange and characterized by a series of characterization methods. The photocatalytic performance tests showed that the effective separation of photogenerated electron-hole pairs as well as the photocatalytic activities of the AgI/BiOI composites could be achieved by adjusting the Ag/Bi molar ratios, which may result in changes in composition and structure of AgI/BiOI composites. Among them, the AgI/BiOI-1.2 sample with a Ag/Bi molar ratio of 1.2 demonstrated Bi5O7I composition and the highest separation efficiency of photogenerated electron-hole pairs as well as the best photocatalytic performance for norfloxacin (NOR) photodegradation. More than 98.8% of NOR could be removed on over AgI/BiOI-1.2 within 120 min under the optimum conditions. Radical quenching experiments confirmed that the photo-generated holes and ∙O2‒ radicals played significant roles during the process of photocatalytic NOR degradation. A possible Z-type heterojunction mechanism for photocatalytic degradation of NOR over AgI/BiOI-1.2 was proposed.
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高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2021
·Vol. 38
·期 2
·442-453
·
IF 3.309
Cui Yanhua,Yang Lili,Yan Yan,Wang Zengkai,Zheng Jian,Li Binrong,Feng Yonghai,Li Chunxiang,Meng Minjia
The photocatalytic efficiency of conventional blending photocatalytic membranes suffers a significant reduction due to effective photocatalyst embedded in membrane matrix. Therefore, in this study, inspired by the bioadhesive technology of polydopamine (pDA), a novel Ti doped bismuth oxyiodide (BiOI)-polydopamine (pDA)-coated cellulose acetate (CA) (Ti/BiOI-pDA/CA) photocatalytic nanocomposite membranes were successfully developed for effective removal of tetracycline (TC). The Ti/BiOI-pDA/CA nanocomposite membranes displayed very high photocatalytic activity toward TC (about 98% after 120 min) under visible light irradiation and superior photodegradation kinetics (k=0.03214 min −1 ). The removal rate of Ti/BiOI/-pDA/CA nanocomposite membranes under dynamic cyclic degradation system could be further improved, giving TC removal efficiency of 91% in 60min. Remarkably, the permeate flux, flux recovery ratio (FRR), reversible fouling (Rr), irreversible fouling (Rir) and the total fouling ratio (Rt) revealed the Ti/BiOI-pDA/CA nanocomposite membranes had excellent antifouling performance. In addition, the Ti/BiOI-pDA/CA nanocomposite membranes exhibited excellent stability and reusability. Therefore, this work gives insight into the effective removal of TC wastewater and has a great potential for new generation of high-performance photocatalytic membranes for practical wastewater treatment in the future.
研究领域:
环境科学
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材料科学
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
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2026
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IF 2.8
Yan Gang,Wang Rui,Yin Cuiwei,Zhao Qi,Cao Xuzheng,Zhang Hao,Shi Hongfei
An effective approach to eliminating organic pollutants is to develop step-scheme (S-scheme) heterojunction photocatalysts, because such heterojunctions can effectively promote photogenerated carrier separation while maximally retaining strong redox capability. Herein, S-scheme Bi 2 S 3 /BiOI (BBS) photocatalysts were synthesized using the in situ ion exchange method. Morphology and structure of BBS, as well as its photoelectrochemical properties, among others, were studied and analyzed. The photocatalytic activity of BBS was evaluated by degrading formaldehyde (HCHO) and methyl orange (MO). Compared with BiOI and Bi 2 S 3 , BBS catalysts demonstrated a remarkable improvement in photocatalytic performance under irradiation with visible light ( λ > 400 nm). With the highest photocatalytic efficiency, BBS-0.01 achieved degradation rates of 80% for HCHO (0.16 mg L −1 ) in 90 min and 97% for MO in 210 min. This notable enhancement in photocatalytic performance is attributed to the in situ ion exchange method, which constructs heterojunctions with intimate interfacial contact, uniform component distribution, high carrier separation efficiency, abundant active sites, and excellent stability. Furthermore, the S-scheme heterostructure further enhances catalytic performance owing to its well-matched energy band structures, efficient carrier separation, and the combined effect with the internal electric field (IEF). In addition, BBS photocatalysts exhibit a stronger visible-light response capability, consequently enhancing the overall photocatalytic efficiency. Hence, the BBS heterojunction photocatalyst presented in this work is a highly promising material for environmental applications under visible light. Graphical
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Catalysts
·
2022
·Vol. 12
·期 12
·1596
·
IF 4.501
Litao Jia,Fanghua Li,Chenjia Yang,Xiaonan Yang,Beibei Kou,Yonglei Xing,Juan Peng,Gang Ni,Zhong Cao,Shiyu Zhang,Tong Zhao,Xiaoyong Jin
The degradation efficiency of photoelectrocatalytic (PEC) processes for the removal of organic pollutants is highly dependent on the performance of the photoelectroanode catalyst. The design of PEC systems with a direct Z-scheme charge transfer mechanism and visible light excitation is essential to enhance the degradation efficiency of organic compounds. Here, a α-MnO2/BiOI direct Z-scheme heterojunction photocatalyst was successfully synthesized through a convenient and feasible method. It is remarkable that the photoanode exhibited excellent PEC performance under visible light irradiation; a 95% removal rate of tetracycline (TC) pollutants was achieved within 2 h, and it had excellent stability and reusability, which was expected to degrade antibiotics efficiently and environmentally in harsh environments. The presence of oxygen vacancies (OVs) in the α-MnO2/BiOI heterojunction was confirmed by electron spin resonance technique, and the OVs acted as electron traps that contributed substantially to the separation efficiency of photogenerated carriers. ESR characterization showed that the main reactive radicals during TC degradation were •OH and •O2−. By analyzing the intermediates, the possible degradation pathways of TC were further analyzed and a suitable degradation mechanism was proposed. The toxicity changes in the degradation process were explored by evaluating the toxicity of the intermediates. This study provides a new way to enhance the performance of Bi-based semiconductor photocatalysts for the effective degradation of TC in water.Keywords:direct Z-scheme heterojunction;organic pollutants;OVs;PEC
研究领域:
环境科学
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材料科学
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Analytical Methods
·
2015
·Vol. 7
·期 21
·9340-9346
·
IF 1.821
Kewei Wang,Na Sun,Xinpan Li,Ruihua Zhang,Guangyue Zu,Jine Wang,Renjun Pei
This study reported the development of a p–n heterojunction photoelectrochemical biosensor using a G-quadruplex as the recognition system. The n-type ZnO nanorods and p-type BiOI nanoflakes were combined to form the heterostructure by in situ growth of BiOI attributed to a simple impregnating-hydroxylation method. This simple p–n heterojunction fabrication method could facilitate the development of rapid and sensitive visible light activated PEC sensors. In this study, the ZnO/BiOI photoelectrode showed a rapid photocurrent decrease in the presence of Pb2+ due to the electron withdrawing effect of hemin which bound with the G-quadruplex/Pb2+ complex. This PEC biosensor exhibited a good response following the concentration of Pb2+ in the range from 10 to 100 μM.
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ANALYTICA CHIMICA ACTA
·
2022
·
IF 6.911
Yu Du,Siqi Yu,Zhaohui Li,Huangxian Ju
This work designs a competitive consumption strategy of surface electron donor and light absorption for quenching the photocurrent of ZnSnO 3 nanocubes/BiOI nanoarrays/polydopamine (ZnSnO 3 NCs/BiOI NAs/PDA) as a photoactive material. This material can be formed on electrode surface by successive coating and deposition to provide a substrate for immobilization of capture antibody, and producing strong photocurrent in the presence of ascorbate acid as a surface electron donor due to the well matching structure of band gaps between ZnSnO 3 NCs and BiOI NAs, the excellent light absorption ability and high photo-electron conversion efficiency of BiOI NAs and PDA, and the accelerated electron transfer . Using ascorbate oxidase loaded dopamine-melanin nanosphere (DAM-AAO) as a label of the signal (secondary) antibody, the sandwich-type immunoreaction leads to dual photocurrent quenching of the label through the competitive consumption of ascorbate acid with enzymatic oxidation and the light absorption by DAM nanosphere. Thus, a sensitive “On-Off” photoelectrochemical (PEC) immunosensing method is constructed for the analysis of neuron specific enolase (NSE). The proposed method shows a detection range of 0.1 pg/mL −50 ng/mL and a detection limit of 0.03 pg/mL. The excellent performance and the recovery text demonstrated the practicability of the designed strategy and label in immunoassay of different protein biomarkers.
研究领域:
生物医学工程
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分析化学
·
光电化学
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Ping Liang,Shuai Shao,Xiaocan Liu,Ziwen Zhang,Dandan Wang,Weiye Yang,Lijian Meng,Junfeng Zhang,Shihua Zhao
This study reports the construction of a g-C₃N₄/ZnTiO₃/BiOI ternary heterojunction photocatalyst for the efficient degradation of organic dyes. The optimized g-C₃N₄/ZnTiO₃/BiOI composite with a mass ratio of 1:1:2 exhibited excellent photocatalytic activity toward Rhodamine B (RhB), achieving nearly complete degradation within 40 min at pH 11, with an apparent rate constant of 0.05114 min⁻¹ . The composite also showed photocatalytic degradation ability toward methylene blue (MB) and methyl orange (MO), as well as satisfactory performance in different real water matrices, demonstrating its broader applicability. Structural and surface analyses confirmed the successful formation of the ternary composite, while BET results indicated that the retained mesoporous structure facilitated reactant diffusion and interfacial mass transfer. UV–vis DRS revealed an extended light absorption range beyond 600 nm, and photoelectrochemical measurements demonstrated reduced charge-transfer resistance and enhanced separation and migration of photogenerated carriers. Radical trapping and EPR analyses identified ¹O₂ and •OH as the dominant reactive species. After five cycles, the RhB degradation efficiency remained above 90%, indicating good stability. Combined with Mott–Schottky measurements, XPS analysis, work-function calculations, Bader charge analysis, and differential charge density results, a ZnTiO₃-mediated dual S-scheme charge-transfer mechanism was proposed. This work provides a feasible strategy for designing efficient ternary heterojunction photocatalysts for dye-contaminated wastewater treatment.
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Inorganics
·
2025
·Vol. 13
·期 5
·147
·
IF 3
Shuxian Qiu,Danhua Zhao,Runtong Luo,Xiaohong Liu,Jianping Yang,Lijun Xie,Xingyuan Gao,Liaochuan Jiang
A Yb3+-doped BiOI 3D nanosheet array composite was successfully fabricated through a solvothermal deposition strategy on flexible carbon cloth (CC). This composite was subsequently integrated with high-chlorine fly ash (FA) blocks to form the Yb-BiOI/CC/FA hybrid material. Comprehensive characterization was performed using multiple analytical techniques for crystalline phase identification, morphological analysis, valence state, band structure evaluation, and charge carrier separation assessment. Electrochemical measurements were conducted to evaluate the material’s electronic properties. Experimental results demonstrated superior photocatalytic performance under visible light irradiation, with the Yb-BiOI/CC/FA composite achieving 52.87% methylene blue degradation efficiency. The reaction rate constant of this modified nanomaterial was approximately 2.1 times higher than that of pristine BiOI/CC/FA. Radical trapping experiments revealed that superoxide radicals (·O2−) served as the predominant oxidative species. This study presents a dual-benefit strategy for environmental remediation by simultaneously achieving sustainable waste valorization of industrial byproducts (FA) and developing high-efficiency photocatalytic materials. The successful integration of rare-earth metal modification with substrate engineering provides valuable insights for designing advanced photocatalytic systems for pollutant degradation.
研究领域:
环境科学
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材料科学
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高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Meng Lan,Xiaoli Dong,Nan Zheng,Yujun Liu
The continuous increase of heavy metal pollution has seriously affected the ecological environment and human health, and photocatalysis technology is considered to be one of the most effective and environmentally friendly treatment methods. Herein, BiOI/Bi 2 S 3 Z-scheme heterostructure photocatalyst with abundant oxygen vacancies was fabricated and applied for the removal of hexavalent chromium (Cr(VI)). The tightly contact interface of in situ heterostructure and abundant oxygen vacancies can accelerate charge transport and improve the photogenerated carrier separation efficiency. The unique charge transmission path of the Z-scheme heterostructure endows the material with superior redox ability. BiOI/Bi 2 S 3 with optimized ratio can achieve effective reduction of Cr(VI) with the efficiency of 95.6 % under 10 min visible light illumination This work offers a promising photocatalyst for promoting the disposal of chromium-containing wastewater.
研究领域:
环境科学
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材料科学
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Can Wang,Peng Du,Laihui Luo,Yue Tian,Weiping Li
Developing novel photocatalysts with intense sunlight-harvesting capacity is still a challenge to realize pollutant degradation and water splitting. To settle this issue, we couple the Gd2MoO6:0.04Er3+/0.10Yb3+ (GMEY) upconverting particle with the BiOI microplate to construct the BiOI@GMEY-x composites. Their corresponding crystal structure, morphology, chemical composition, and upconversion (UC) properties are studied. Due to the UC emission behavior of the GMEY particle, near-infrared (NIR) light can be converted to green and red emissions which could be reabsorbed by the BiOI microplate, bringing about the full use of visible–NIR light by the prepared composites for photocatalysis. Upon visible light irradiation, the resultant samples exhibit good photocatalytic activities in the degradation of methyl blue, RhB, and methyl orange. Compared with that of the BiOI microplate, improved photocatalytic activity is achieved in the resultant composites due to the effect of a built-in electric field and an enhanced sunlight-harvesting ability. Furthermore, the h+ and •O2– species are responsible for the mechanism of photocatalysis. Additionally, excited by full spectrum light, the H2 production capacity of the designed samples is also investigated. It is found that the BiOI@GMEY-10 composite can split water efficiently and its H2 production rate is 10.35 μmol/g/h. These results indicate that both pollutant degradation and water splitting are able to be realized by utilizing the BiOI@GMEY-x composites.
研究领域:
材料科学
·
环境科学
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Jiajing Zhang,Yongjie Zheng,Heshan Zheng
Adjusting the desired structure and heterojunction interface of photocatalytic materials using a facile and efficient strategy is still challenging. In this study, a novel two-dimensional/three-dimensional (2D/3D) oxygen-doped g-C 3 N 4 /BiOI heterostructure nano-sphere (O-g-C 3 N 4 /BiOI) was successfully prepared by a facile solvothermal method for the degradation of nondye organic contaminants. Its composition , morphological characteristics, chemical structure and electrochemical properties have been measured. The result shows the introduction of oxygen doping (O-doping) causes a new defect energy level, extends the light absorption range, and the formation of heterojunction enables the effective separation of photo-generated carriers. Under visible light irradiation, the optimum ratio of O-g-C 3 N 4 /BiOI (2:1) exhibited 100% removal efficiency of bisphenol A within 80 min, which was about 9.1, 2.33, 3.45, and 1.6 times that of pure g-C 3 N 4 , O-g-C 3 N 4 , BiOI, and O-doped-poor heterostructure, respectively. Based on the identified intermediates, the photocatalytic mechanism of O-doped O-g-C 3 N 4 /BiOI (2:1) was also revealed. This finding suggested that the synergistic effect between 2D/3D heterojunction and O-doped greatly promoted visible light photoabsorption and photoinduced carrier separation efficiency with a prolonged lifetime, which was confirmed by multiple optical and electrochemical analyses . This study could bring new opportunities for the rational design of highly efficient photocatalysts by combining 2D/3D heterojunctions with O-doped in environmental remediation.
研究领域:
材料科学
·
环境化学
·
光催化
·
纳米材料
·
半导体异质结
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Jiashu Huang,Xiaoshan Zheng,Yang Liu,Fengliang Wang,Daguang Li,Haijin Liu,Ruobai Li,Tiansheng Chen,Wenying Lv,Guoguang Liu
Bismuth oxyiodide (BiOI) has garnered intense attention in the field of photocatalysis for environmental remediation; however, it suffers from a high electron-hole recombination rate. In this study, for the first time, we report on a facile strategy for the creation of oxygen vacancies in BiOI via strontium (Sr 2+ ) doping. The as-prepared 0.45-SrBiOI demonstrated significantly enhanced photocatalytic degradation of indometacin under visible light exposure, which was almost 10 folds higher than pristine BiOI. This augmented photocatalytic performance was ascribed to the accelerated separation of charge carriers by oxygen vacancies, as well as Sr ion trapping electrons. Reactive species determination experiments revealed that O 2 ▪− , 1 O 2 , and h + were the dominant active species. Finally, potential indometacin degradation pathways were proposed based on the identification of degradation by-products and theoretical calculations. This study offers new perspectives for the synthesis of highly efficient and cost effective BiOI-based photocatalysts, and provides a promising strategy toward advanced environmental remediation.
研究领域:
环境科学
·
材料科学
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高影响因子
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