CERAMICS INTERNATIONAL
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2025
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IF 5.6
Jingmei Li,Luyin Zhao,Chunjiao Hu,Ling Zhang
The escalation of medication resistance in pathogenic bacteria has resulted in significant damage to public health and safety, as bacterial and fungal illnesses proliferate. Additionally, pathogenic bacteria disseminate via water resources, leading to water contamination and adversely impacting the quality of the living environment. Consequently, the creation of an efficient antibacterial material has emerged as a focal point of study. Photocatalysis, as an innovative, environmentally friendly, and effective technique, has been extensively used in degrading and antibacterial domains.For the first time, Bi 2 WO 6 /Bi 4 O 5 I 2 composites with molar ratios of 1:1, 1:2, 1:3, and 1:4 were produced using the water bath-calcination technique including bismuth nitrate pentahydrate, sodium tungstate dihydrate, and potassium iodide, and their photocatalytic antibacterial characteristics were examined. Their characterization was conducted using XRD, XPS, SEM, FT-IR, and UV techniques. The antibacterial efficacy was evaluated using a low-power 35 W LED light irradiation dilution coated plate technique. The experimental findings demonstrated that, in the presence of 35w LED lighting, the antibacterial rate against E.coli , Bacillus subtilis , and P.aeruginosa reached 100 % in 10 min at a concentration of 1000 mg/L of BWOI-3 composite material, and the antibacterial efficiency against S. aureus reached 100 % in 5 min. Within 50 min, the antibacterial efficacy against Candida albicans was 100 %. The Bi 2 WO 6 /Bi 4 O 5 I 2 compound has shown exceptional broad-spectrum antibacterial efficacy.
研究领域:
材料科学
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微生物学
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环境科学
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产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2023
·Vol. 34
·期 40
·405201
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IF 3.5
Zhuohua Chen,Xiaoli Jin,Qing Lan,Xin Li,Qunzeng Huang,Wenmin Liu,Yuwei Guo,Haiquan Xie,Liqun Ye
Photocatalytic CO2 reduction is considered to be an appealing way of alleviating environmental pollution and energy shortages simultaneously under mild condition. However, the activity is greatly limited by the poor separation of the photogenerated carriers. Ion doping is a feasible strategy to facilitate the charge transfer. In this work, Ni-doped Bi4O5I2 photocatalyst is successfully fabricated using a one-pot hydrothermal method. A few doping levels appear in the energy band of Bi4O5I2 after Ni doping, which are used as springboards for electrons transition, thus promoting photoexcited electrons and holes separation. As a consequence, a remarkably enhanced yield of CO and CH4 (6.2 and 1.9 μmol g−1 h−1) is obtained over the optimized Bi4O5I2-Ni15, which is approximately 2.1 and 3.8 times superior to pure Bi4O5I2, respectively. This work may serve as a model for the subsequent research of Bi-based photocatalysts to implement high-performance CO2 photoreduction.
研究领域:
材料科学
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环境科学
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能源科学
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DOI
高影响因子
CRYSTENGCOMM
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2019
·Vol. 21
·期 28
·4158-4168
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IF 3.382
Dongfang Hou,Fan Tang,Bingbing Ma,Min Deng,Xiu-qing Qiao,Yun-Lin Liu,Dong-Sheng Li
Optimally engineered heterojunctions are of great interest to pursue higher photocatalytic activity in a wide range of applications. A series of controlled Bi4O5I2/Bi2S3 heterojunctions have been fabricated through a solvothermal method combined with an anion exchange process. The in situ growth of Bi2S3 nanorods from Bi4O5I2 flowers reveals that there exist strong coupling and intimate interfaces between the two semiconductors. The Bi4O5I2/Bi2S3 heterojunctions exhibit excellent photocatalytic activities and stability in the photocatalytic reduction of Cr(VI) under visible light irradiation (λ > 420 nm). The highest apparent rate constant is up to 0.05614 min−1, which is about 56 and 7.5 times that of pristine Bi4O5I2 and Bi2S3, respectively. Further detailed characterization reveals that the drastically enhanced and stable Cr(VI) reduction can be attributed to the efficient transfer and spatial separation of the photo-induced carriers, resulting in strong light harvesting. It results from not only the synergetic effects of Bi2S3 sensitization and heterojunctions with matched band structures, but also the unique flower/nanorod architecture and intimate contact at the molecular scale between Bi4O5I2 and Bi2S3. It also provides critical insights into the underlying pathways involved in the photocatalytic reduction of Cr(VI) over Bi-based heterojunctions.
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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2017
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IF 9.446
Xiaoli Jin,Chade Lv,Xin Zhou,Congmin Zhang,Qingqiang Meng,Yue Liu,Gang Chen
Oxide defect engineering in semiconductors is of growing interest and considered as an important strategy for promoting photocatalytic performance, as it enables to couple solar energy into oxygen activation. Herein, the surface oxygen vacancies are introduced into bismuth-rich Bi 4 O 5 I 2 nanosheets (Bi 4 O 5 I 2 -OV) via a facile solvothermal route. By introducing oxygen vacancies into Bi 4 O 5 I 2 , the molecule oxygen adsorption is significantly improved. More importantly, attributed to the molecular oxygen adsorption, an instantaneous surface-bulk homojunction is constructed, which facilitates the separation and transport of photogenerated charge carriers. Therefore, noticeable molecular oxygen activation and N 2 fixation are achieved in Bi 4 O 5 I 2 -OV. These findings may shed light on designing highly efficient photocatalysts and provide fresh insights into understanding the charge migration mechanism in oxygen vacancies-related photocatalytic system.
研究领域:
材料科学
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光催化
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Lu Chen,Zhengkai Wu,Xueying Cheng,Shuyu Chen,Jiaxin Zhao,Hang Li,Yingna Guo,Qingkun Shang
In this paper, Bi 4 O 5 I 2 /α-Bi 2 O 3 composite photocatalysts were successfully prepared by loading Bi 4 O 5 I 2 nanosheets on the surface of α-Bi 2 O 3 nanorods. The photocatalytic performance was investigated for the degradation of propranolol under visible light. Bi 4 O 5 I 2 /α-Bi 2 O 3 (30) could degrade 95 % of propranolol within 120 min, and the degradation rates of propranolol were 64.3 and 2.68 times that of α-Bi 2 O 3 and Bi 4 O 5 I 2 , respectively. The mineralization degree of propranolol reached 54.7 %, which was also much higher than that of Bi 4 O 5 I 2 and α-Bi 2 O 3 alone. Based on the results of high-resolution mass spectrometry (HRMS), the possible degradation pathways and products of propranolol were proposed, and the environmental toxicity of the degradation products was evaluated. The formation mechanism of Bi 4 O 5 I 2 /α-Bi 2 O 3 Z-type heterojunction was proposed by investigating the band structure and photoelectric properties of the composite photocatalyst. This work provides a successful example for the construction and application of new heterojunction photocatalysts.
研究领域:
环境科学
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材料科学
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药学
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产品关联
DOI
高影响因子
Catalysis Science & Technology
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2017
·Vol. 7
·期 16
·3580-3590
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IF 5.773
Xiufan Liu,Xuyang Xiong,Shuoping Ding,Qingqing Jiang,Juncheng Hu
In this work, we firstly synthesized metallic Bi-modified Bi4O5I2 nanocomposites with oxygen vacancies via a facile one-pot solvothermal method. The deposited Bi metal and oxygen vacancies endowed the Bi/Bi4O5I2 samples with dramatically enhanced photocatalytic performance for degradation of bisphenol A (BPA) and methyl orange (MO) under visible light irradiation. In particular, the improved photocatalytic activity can be ascribed to the synergistic effect of Bi metal and oxygen vacancies, which resulted in their efficient light harvesting properties and excellent charge separation ability. The photocatalytic mechanism of Bi/Bi4O5I2 for organics degradation was demonstrated. This work could shed light on exploring high photocatalytic performance materials and stimulating the development of non-noble metal/BixOyIz photocatalysts, which would also contribute to advancement in environmental remediation and energy exploitation.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
CATALYSIS COMMUNICATIONS
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2019
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IF 3.674
Xu Yan,Ziyang Wu,Peipei Yang,Yanli Mao,Biao Liu,Yong Zhao,Hao Shen,Dongliang Wang
In this article, novel Bi 2 S 3 /Bi 4 O 5 I 2 heterojunction was synthesized by a facile ion-exchange method with thioacetamide as sulfur source. Multiple techniques were employed to analyze the structure and chemical composition of prepared samples. The photocatalytic performance of the Bi 2 S 3 /Bi 4 O 5 I 2 heterojunction samples was investigated by the photodegradation of methyl orange under visible light. The Bi 2 S 3 /Bi 4 O 5 I 2 heterojunction of S/BOI-2 sample presented the highest activity constant among all samples. Additionally, the photocatalytic mechanism is proposed according to the trapping experiments and electron spin resonance (ESR) results.
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Haidong Luo,Shuai Dong,Suhang Chen,Fengqi Zhao,Kangzhen Xu
Photocatalytic-Fenton synergistic degradation of pollutants in wastewater is considered a promising technology for environmental treatment. Herein, FeOOH quantum dots decorated La-doped Bi 4 O 5 I 2 hybrids were prepared using an in-situ deposition strategy and applied for the removal of 2,4-dinitrophenylhydrazine. The FeOOH-1/La 10 -Bi 4 O 5 I 2 sample exhibits the highest catalytic activity in degradation experiments, eliminating 93.8 % of 2,4-dinitrophenylhydrazine within 30 min at a reaction rate constant of 0.117 min −1 . In addition, the impacts of several operational parameters on the catalytic activity were comprehensively examined, including H 2 O 2 concentration, catalyst dosage, reaction solution pH and co-existing ions. In degradation process of 2,4-dinitrophenylhydrazine, the major reactive oxygen species are ·OH and ·O 2 – , with ·OH generated by Fenton reaction. Optical property characterization, cyclic voltammetry tests, and photoelectrochemical measurements confirmed that the FeOOH-1/La 10 -Bi 4 O 5 I 2 composite has excellent light absorption capacity, abundant active centers, and excellent carrier separation efficiency. Finally, the degradation mechanism of FeOOH-1/La 10 -Bi 4 O 5 I 2 composites for 2,4-dinitrophenylhydrazine is rationally discussed based on experimental and theoretical calculations. This study presents a fresh design idea for developing bismuth oxyhalide-based composites with high activity.
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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2022
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IF 9.136
Chenxi Zhu,Yingjun Wang,Longyu Qiu,Yequn Liu,Haibo Li,Yongsheng Yu,Jiaming Li,Weiwei Yang
Fenton reaction is proved to be an efficient method for degrading organic pollutants in wastewater. However, the narrow pH range greatly restricts the application of Fenton reaction. Herein, the 3D hierarchical Fe-doped Bi 4 O 5 I 2 microflowers have been synthesized via a hybrid solvothermal-calcination method and applied in a photo-Fenton system for efficient removal of tetracycline (TC). The optimized Fe-doping Bi 4 O 5 I 2 (11Fe-BOI) microflowers present more than 90% degradation efficiency over the pH range of 3.0–9.0 in Fenton system under visible light irradiation, and the reaction rate constant in 11Fe-BOI/H 2 O 2 /Vis system is 2.79 × 10 −2 min −1 , which is 19.11, 1.85 and 7.71 times higher than that of H 2 O 2 /Vis (1.46 × 10 −3 min −1 ), 11Fe-BOI/Vis (1.51 × 10 −2 min −1 ) and 11Fe-BOI/H 2 O 2 (3.61 × 10 −3 min −1 ) systems, respectively. The synergy effect of photocatalysis and Fenton reaction plays a pivotal role for the TC degradation process via accelerating the separation of carriers and the generation of reactive oxygen species. The scavenging experiments and EPR results manifest that O 2 – and OH are dominant active species during the TC degradation process. This work provides great prospect to fabricate an efficient non-noble metal photocatalyst for photo-Fenton degradation of antibiotics.
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
ENVIRONMENTAL RESEARCH
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2025
·
IF 7.7
Dongyuan Li,Xiaojun Peng,Rui Zhang,Yadong Chen,Xianwei Dai,Wenling Wang
The Z-type heterojunction CoS/Bi 4 O 5 I 2 material was prepared by the solvothermal method. The crystal structure and surface elemental valence state of the material were investigated by XRD, XPS, and other characterization methods. The microstructure of the material was investigated by SEM, BET, and other methods. In the experiment of degradation of 20 mg/L tetracycline hydrochloride using the prepared photocatalytic materials, the optimal photocatalytic performance of CoS/Bi 4 O 5 I 2 was explored with the introduction of 1.5 % CoS, and the degradation rate could reach 94.7 %. It was also found that 1.5 % CoS/Bi 4 O 5 I 2 had stable photocatalytic performance and good photocatalytic performance for all tetracycline antibiotics. Then the possible degradation pathways in the degradation process of TCH were explored using GC-MS, and the acute toxicity of the intermediates was evaluated by ECOSAR software. The UV–vis-DRS results showed that the overall photoelectrical properties of the composites were enhanced after introducing CoS with broad-spectrum absorption properties, and the PL and EIS results also proved the collation. The possible degradation mechanism of the CoS/Bi 4 O 5 I 2 system was also speculated by combining the free radical trapping experiments with the M-S curve results. The increasing severity of antibiotic pollution necessitates the development of highly efficient photocatalytic materials to enhance environmental remediation capabilities. Traditional photocatalysts suffer from high recombination rates of photogenerated carriers and low degradation efficiency. To enhance the photocatalytic activity and cycling stability of Bi 4 O 5 I 2 , we synthesized a CoS/Bi 4 O 5 I 2 heterojunction material via a solvothermal method. Using 20 mg/L TCH as a model pollutant, we investigated the photocatalytic efficiency of the prepared material. Through comprehensive experiments and structural analyses using XRD, XPS, and SEM, we explored the photocatalytic degradation performance and mechanism of tetracycline, confirming that CoS/Bi 4 O 5 I 2 is an ideal material for constructing a Z-type heterojunction, effectively reducing the recombination of photogenerated electron-hole pairs. Compared to pure Bi 4 O 5 I 2 , the CoS/Bi 4 O 5 I 2 composite exhibits superior performance in improving charge separation efficiency and enhancing visible light absorption. This study successfully constructs a Z-type heterojunction with efficient electron-hole separation, significantly enhancing photocatalytic efficiency. The composite material holds great potential for antibiotic pollution treatment, while the elucidation of its photocatalytic degradation mechanism provides theoretical guidance for designing novel photocatalysts.
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 ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Yuhan Tao,Yi Dong,Jingjing Xu,Mindong Chen
Ion doping represents a viable strategy for improving the photocatalytic performance of semiconductor materials. This study successfully synthesized Sn 4+ -doped Bi 4 O 5 I 2 photocatalysts through an in-situ calcination approach. Structural characterization confirmed that Sn 4+ incorporation induced lattice contraction while increasing the density of active surface sites. Photocatalytic evaluation revealed that the 10 % Sn-BOI catalyst achieved 95.4 % levofloxacin (LOFX) degradation within 40 min under visible light irradiation, exhibiting a reaction rate constant (k) 5.2-fold greater than undoped Bi 4 O 5 I 2 . The catalyst demonstrated excellent stability, retaining high activity through four consecutive recycling tests. Mechanistic studies showed that oxygen vacancies (OVs) generated during doping modified the electronic structure by elevating the valence band maximum and narrowing the bandgap, while simultaneously promoting charge separation through electron trapping. These findings establish an effective methodology for developing photocatalysts to address antibiotic pollution in wastewater.
研究领域:
材料科学
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环境科学
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光催化
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半导体掺杂
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废水处理
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
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2022
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IF 3.754
Cailian Xia,Ruixin Lu,Qiaofeng Han
Bismuth-rich oxyiodides are promising photocatalysts owing to their unique layered structures, tunable band potentials and excellent redox ability. It is significant to explore a facile and energy-saving method to prepare Bi x O y I z -based heterojunction photocatalysts with enhanced photocatalytic performance. In this work, Bi 4 O 5 I 2 /Bi 5 O 7 I heterojunction was prepared at room temperature in the existence of thiourea (TU). The addition of TU not only reduced pH value to 6 for the generation of Bi 4 O 5 I 2 /Bi 5 O 7 I heterojunction from pH 11 in water, but also improved the photocatalytic performance. The as-prepared Bi 4 O 5 I 2 /Bi 5 O 7 I (pH 6) heterojunction exhibited superior photocatalytic activity for the degradation of tetracycline (TC) and malachite green (MG) with degradation efficiency of 89.8% and 98.2% within 120 min of visible light illumination, respectively. And the photocatalytic performance was better than those of Bi 4 O 5 I 2 /BiOI heterojunction obtained in the absence of NaOH (79.2%; 85.8%), pure BiOI synthesized without the addition of TU (pH 6) (81%; 81.4%), and Bi 4 O 5 I 2 /Bi 5 O 7 I heterojunction produced at pH 11 in water (38.7%; 85.4%). The enhanced photocatalytic activity of Bi 4 O 5 I 2 /Bi 5 O 7 I (pH 6) heterojunction could be attributed to smaller particles with higher specific surface area and high exposure ratio of (001) facet of Bi 5 O 7 I and (402) facet of Bi 4 O 5 I 2 .
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
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