JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Xia Zhang,Changcheng Yang,Jian Su,Zhi-Hui Xie,Shixiong Hao
The lower specific surface area and limited surface contact between BiOCl and TiO 2 in composite fabricated by hybridization of TiO 2 with BiOCl extremely hinder its catalytic performance. In this work, the area of interface contact between BiOCl and TiO 2 was increased through the mediation of SiO 2 , and a Bi-modified ternary 0D/2D/2D TiO 2 /BiOCl Z-scheme heterojunction photocatalyst with large specific surface area (= 237.83 m 2 g −1 ) and surface plasmon resonance (SPR) effect was constructed in situ by ingeniously utilizing the reduction of carbon species generated during the calcination process. The results show that the COD removal rate of Bi/TBOC-10% for real liquor brewing wastewater (LBW) reaches 90.5% after 10 hours of visible light irradiation, which is 2.6 times and 2.1 times that of TiO 2 and Degussa P25, respectively. The COD removal rate of the composite was reduced only by 8.9% after five cycles of performance test (50 h). Photoluminescence spectroscopy (PL), Transient Photocurrent Response (TPR), Electrochemical Impedance Spectroscopy (EIS) and BET characterization suggest that its excellent photocatalytic activity should be attributed to the Z-scheme heterojunction that broadens the light absorption range while retains strong oxidation-reduction active sites, the SPR effect that facilitates the separation and migration of photogenerated carriers, and high specific surface area of the composite that provides more active sites for the photodegradation reaction.
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
CHEMOSPHERE
·
2023
·
IF 8.8
Yunlei Zhou,Zhuangzhuang Wang,Huanshun Yin,Xiaoting Cui,Ying Tian,Zhen Qiao,Suo Wang,Runye Hu,Wenjing Lv,An Mao,Jun Wang
2D Ag/BiOCl/Bi 2 O 2 CO 3 S-scheme heterojunction was prepared with oxygen vacancy (OVs) via one-pot hydrothermal method. The XRD and XPS analysis indicated the synthesized sample contained Ag nanoparticles (AgNPs) instead of Ag ions. The SEM and HRTEM pictures showed that BiOCl/Bi 2 O 2 CO 3 nanosheets were modified with AgNPs. Compared with AgNPs, BiOCl, and Bi 2 O 2 CO 3 , Ag/BiOCl/Bi 2 O 2 CO 3 exhibited highly photocatalytic inactivation of pathogenic fungi ( Fusarium graminearum ) due to the wide light absorption range and S-scheme heterojunction structure, which improved the production and transfer of photogenerated carrier, and enhanced the separation of photogenerated e − /h + pairs. In addition, the improved photocatalytic disinfection against Fusarium graminearum of Ag/BiOCl/Bi 2 O 2 CO 3 was verified in Sedeveria Letizia plant . Furthermore, active species capture assay and ESR experiments disclosed the involvement of OVs, h + , ∙O 2 − , ∙OH, and – for Fusarium graminearum destruction during photocatalysis process. The S-scheme heterojunction was proved via oxygen vacancy, which was extensively beneficial to increase charge transmission and separation efficiency. Our work proposed Ag/BiOCl/Bi 2 O 2 CO 3 was an efficient and ecological fungicide to inactive Fusarium graminearum in vitro and vivo for crop disease .
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PubMed
高影响因子
Materials Advances
·
2022
·Vol. 3
·期 20
·7546-7558
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IF 0
Hecheng Ma,Jianjun Liu,Yimeng Wang,Shengli Zuo,Yingchun Yu,Baoshan Li
Photocatalytic degradation has been developed as a promising strategy for environmental remediation. Black phosphorus (BP) has attracted much attention in the field of photocatalysis due to the adjustable bandgap and high carrier mobility. In this work, we constructed a flower-like BP nanosheet/P-doped BiOCl (BP/P-BiOCl) S-scheme heterostructure via a simple co-precipitation method. The physicochemical properties such as the crystallinity, morphology, chemical environment, and optical and electronic properties of the as-fabricated materials were analyzed by using different analytical techniques. SEM data indicated the successful formation of a flower-like structure of BP/P-BiOCl composites. X-Ray photoelectron spectroscopy data indicated the formation of P-doped BiOCl. X-Ray diffraction and high resolution-TEM data revealed the formation of a hierarchical BP/P-BiOCl heterostructure. The catalytic activity of the as-synthesized samples (15%-BP/P-BiOCl) was tested towards RhB degradation (96% of 20 ppm RhB solution) and Cr(VI) reduction (90% of 20 ppm Cr(VI) solution) under solar light illumination. We demonstrated the formation mechanism of a flower-like structure in which positively charged BPNs assembled with negatively charged P-BiOCl by electrostatic attraction. Furthermore, we revealed the S-scheme photocatalytic mechanism to prove the enhanced photocatalytic activity of BP/P-BiOCl composites. The photodegradation of phenol, radical species trapping experiments and charge transfer route test were performed to prove the formation of the S-scheme. This work provides a facile route for the construction of a flower-like S-scheme heterostructure photocatalyst for efficient solar light photocatalytic performance.
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CHEMICAL ENGINEERING JOURNAL
·
2020
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IF 10.652
Runren Jiang,Guanghua Lu,Matthew Nkoom,Zhenhua Yan,Donghai Wu,Jianchao Liu,Tianjian Dang
Developing excellent photocatalysts to mineralize pollutants and reduce toxicity is an urgent problem in current environment purification research. Here, we synthesized a novel 2D/2D Cu 2 WS 4 /BiOCl Z-scheme system by a facile solvent mixing method and characterized the samples by various analytical methods. Compared with 3D/2D, the close contact surface of the 2D/2D catalyst endows it with extremely fast charge transfer and a large number of active sites, a Z-scheme system process strong electronic interaction and efficient charge separation, resulting in the high photocatalytic performance of the 2D/2D Cu 2 WS 4 /BiOCl Z-scheme system. As expected, The 15% 2D/2D Z-scheme Cu 2 WS 4 /BiOCl possessed the highest rate constant 1.14 × 10 −1 min −1 in the degradation of benzophenone-1 (BP1), which are 8, 5 and 4 times greater than that of BiOCl (1.36 × 10 −2 min −1 ), Cu 2 WS 4 (2.27 × 10 −2 min −1 ) and 15% 3D/2D Cu 2 WS 4 /BiOCl (2.6 × 10 −2 min −1 ), respectively. Meanwhile, the practicability of Cu 2 WS 4 /BiOCl was studied by the influence of relevant real water matrix on photocatalytic degradation of BP1. In addition, the result of density functional theory calculations demonstrated that the 2D/2D Cu 2 WS 4 /BiOCl system has faster charge transferability and closer integration than that of the 3D/2D system, which further confirms that the close 2D interface is conducive to charge transfer at the interface. Nine potential degradation products were identified as intermediates, and extremely significant toxicity reduction during the degradation process was confirmed by an ECOSAR prediction and zebrafish acute toxicity test . Compared with gene expression, the hatching rate and survival rate of zebrafish embryo are more sensitive and considered to be better choices for toxicity assessment.
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高影响因子
Journal of Cleaner Production
·
2025
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IF 10
Zehao Li,Boqiang Gao,Shuanglong Ma,Kai Wang,Jingyi Wei,Shengjun Xu,Yan Huang,Jia Song,Xiaodan Tang,Jingzhen Wang,Sihui Zhan,Bing-Jie Ni
Developing efficient microplastics (MPs) treatment technologies is a key approach to addressing the challenge of MPs pollution. Hydroxyl radical (•OH) is a crucial active species in the MPs photodegradation. Herein, we propose the strategy of constructing bridging-hydroxyl groups (-OH B ) on the surface of BiOCl photocatalyst containing oxygen vacancies to boost the production of •OH and efficiently decompose MPs. Our findings revealed that the OH B15 /BOC-OV system attained the highest steady-state concentration of •OH, exhibiting the best degradation effects on polystyrene-MPs (PS-MPs). The weight-loss rate was approximately twice that of other systems and could increase to 80 % in 48 h. Meanwhile, the changes of the physicochemical properties of PS-MPs under •OH attack, including its micro-structure and functional groups, molecular-weight, and molecular chain structure, was thoroughly explored. Theoretical calculations results demonstrated that -OH B extended the O-H bond length of H 2 O through directly bonding H atoms in H 2 O, lowering the energy-barrier of bond-breakage and promoting the formation of •OH. Additionally, the results of gas chromatography-mass spectrometry and acute toxicity studies indicated that the primary products of PS-MPs were predominantly non-toxic cycloalkane and branched alkanes. Above all, -OH B served as a “bridge” mediating the electron transfer from MPs to the photocatalyst surface, leaving MPs in an electron-poor state and increasing the probability of •OH targeted attack. This work not only offers advanced technology to address MPs pollution but also elucidates the evolution of MPs' physicochemical properties under • OH attacks, thereby furnishing data support for assessing the ecological risks associated with MPs treatment processes.
研究领域:
环境科学
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材料化学
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光催化
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污染控制技术
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聚合物降解
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高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 15
·1240
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IF 4.4
Dongmei Zhang,Jiaqi Zhao,Yangyang Peng,Yuchao Li,Wenbin Guo,Chengzhu Liao
Water pollution seriously affects the development of society and human life. There are various kinds of pollutants, including soluble pollutants and insoluble floaters on the water surface. Herein, the photocatalyst semiconductor BiOCl and superhydrophobic functional particles Mg(OH)2were deposited on the surfaces of canvas and polyester felt to construct superhydrophobic canvas and polyester felt. The contact angles of the synthetic superhydrophobic canvas and polyester felt were measured as 152° and 155.3°, respectively. The selective adsorption of hexadecane was achieved using the wetting difference between the surface of water and pollutants floating on the surface. For dissolved pollutants, the surface wettability needed to be changed with the help of ethanol. The degradation efficiencies were all greater than 90%, demonstrating the versatility of the synthetic superhydrophobic canvas and polyester felt.
研究领域:
环境科学
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材料科学
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污染控制
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纳米技术
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Yanfei Lu,Lianqing Chen,Chengjiang Zhang,Mengxue Yu,Kangle Lv,Xianghong Li,Benjun Xi
The development of photocatalytic nano-purifiers with high electrons and holes separation efficiency and high-photocatalytic activity is essential in treating water and air pollution. In this paper, novel nano-purifiers with S-scheme faceted heterojunction created between BiOCl nanosheets (110) facets and TiO 2 hollow nanocubes (001) facets were successfully fabricated. In nano-purifiers, BiOCl nanosheets are enriched with oxygen vacancies capable of trapping electrons, which synergize with the unique S-scheme faceted heterojunction charge transfer mechanism to facilitate carrier separation and migration to a large extent. Herein, BiOCl(110) nanosheets/TiO 2 (001) hollow nanocubes nano-purifiers (BTHNs) were significantly enhanced in photocatalytic treatment of water and air pollution and were not inferior to other cleaning agents. The obtained 15BTHNs showed the best photocatalytic purification ability among the same series of products. 15BTHNs could degrade 99.9% of RhB in 70 min, which was 25 times higher than that of pure THNs, and effectively removed 44.8% of NO. Moreover, the reduction rate of Cr (Ⅵ) for 15BTHNs reached 99.9% in 90 min, with a kinetic constant 21.5 times higher than that of pure THNs. Active species trapping experiments revealed that four active species of BTHNs contributed to the RhB oxidation reaction in the following order:·OH>h + >·O 2 - >e - , and the contribution rates of 15BTHNs were 45.0%, 38.0%, 12.3%, and 4.7%, respectively. The appropriate ratios of oxidizing TiO 2 to reducing BiOCl in 15BTHNs allowed the generated active species to be fully utilized, achieving oxidation-reduction equilibrium as well as improving the photocatalytic efficiency. This work reveals that the S-scheme faceted heterojunction formed in the BiOCl/TiO 2 nano-purifier was a progressing approach for water and air cleaning.
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Kuan Wang,Tong Sun,Hui Ma,Run-Jing You,Zhen-Hong He,Jian-Gang Chen,Huan Wang,Weitao Wang,Yang Yang,Lei Wang,Zhao-Tie Liu
The conversion of CO 2 into chemicals with value-added can be achieved through the process of photocatalysis, which holds significant importance in the fields of energy and environmental sustainability. Herein, a unique S-scheme In 2 O 3 /Bi/BiOCl heterojunction nanoflower with abundant oxygen vacancies was fabricated by a self-assembly strategy, in which the introduction of In 2 O 3 could effectively regulate the in-situ growth of metal Bi and oxygen vacancy on the surface of BiOCl nanosheet. The nanoflower In 2 O 3 /Bi/BiOCl photocatalysts exhibited exceptional photocatalytic performance in the CO 2 reduction with H 2 O, ascribing to the synergistic effect of the unique S-scheme heterojunction, the surface plasmon resonance (SPR) effect of metal Bi, and oxygen vacancy engineering. Surprisingly, the In 2 O 3 /Bi/BiOCl-4 composites achieved 34.53 μmol⋅g −1 ⋅h −1 photoreduction efficiency of CO 2 -to-CO with high selectivity (97.5 %) and high stability, which was 3.12 times higher compared to the pure BiOCl. The S-scheme heterojunction of In 2 O 3 /Bi/BiOCl-4 nanoflower can promote carrier separation efficiency and improve light utilization. Meanwhile, the large specific surface area and abundant oxygen vacancies of the nanoflower with 3D/0D/2D structure self-assembly can provide more adsorption and active sites for CO 2 photocatalytic reaction. The SPR effect of the in-situ generated metal Bi can further enhance charge transfer to accelerate the photoreduction process of CO 2 . The present study provides a novel approach for the in-situ construction of S-scheme heterojunction photocatalysts with SPR effect and oxygen vacancies to pursue efficient photocatalytic CO 2 reduction in the water phase
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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高影响因子
Journal of Environmental Chemical Engineering
·
2025
·Vol. 14
·期 1
·120680
·
IF 7.2
Zengkai Fu,Zili Lin,Junle Jian,Siling Zhang,Fengyuan Zhang,Yanfang Wang,Yunshuang He,Linsheng Liu,Yishun Wang,Hongda Zhan,Zheng Hu,Ping Chen,Zhenjun Xiao,Wenying Lv,Guoguang Liu
Bisphenol A (BPA), a significant endocrine disruptor, can be efficiently degraded via photocatalysis. However, when applying photocatalytic technology for BPA degradation in wastewater or contaminated water remediation, photosensitive ions present in the aqueous matrix may interfere with the process. Nitrite (NO 2 − ), a common photosensitive ion in aquatic environments, was investigated for its effect on BPA degradation using bismuth oxychloride (BiOCl) photocatalysts. We elucidated the nonlinear regulatory role of this ubiquitous ion within the BiOCl photocatalytic process. The BiOCl/NO 2 − synergistic system revealed that trace NO 2 − regulates the dynamics of photogenerated carriers through two distinct pathways. First, NO 2 ⁻ acts as an efficient electron donor, which suppresses the recombination of photogenerated holes (h⁺) and thereby enhances the generation of superoxide radicals (O 2 •- ) and singlet oxygen ( 1 O 2 ). Second, NO 2 ⁻ serves as a reaction substrate that is oxidized by h⁺ to form highly reactive nitryl radicals (•NO 2 ). The attack of •NO 2 radicals on BPA diverted the conventional degradation pathway, forming nitrated byproducts. Furthermore, the introduction of NO 2 − enhanced the spatial separation of photogenerated charges and synergistically boosted redox activity, while simultaneously converting the highly toxic NO 2 ⁻ into harmless NO 3 − . These findings provide valuable insights for applying BiOCl photocatalysts in real water remediation scenarios where NO 2 − is present.
研究领域:
环境科学
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光催化
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水体修复
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污染物降解
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高级氧化过程
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
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IF 11.698
Fang Deng,Qian Zhang,Lixia Yang,Xubiao Luo,Aijie Wang,Shenglian Luo,Dionysios D. Dionysiou
Although Bi-based compounds are effective photocatalysts for degrading organic pollutants under visible-light irradiation, their visible-light photocatalytic activities are still low and far from practical application. In this study, novel graphene-functionalized Bi-bridge Z-scheme black BiOCl/Bi 2 O 3 (black BiOCl-Bi-Bi 2 O 3 /rGO) heterojunctions with oxygen vacancies were prepared via in situ Fe reduction of BiOCl/graphene oxide nanoplates. In comparison with BiOCl/graphene oxide nanoplates, the black BiOCl-Bi-Bi 2 O 3 /rGO heterojunctions have stronger visible-light absorption, and exhibit more efficient charge separation and higher visible-light photocatalytic activity in degrading 2-nitrophenol (2NP). The black BiOCl-Bi-Bi 2 O 3 /rGO 0.4 shows the highest visible-light photocatalytic activity with almost complete degradation of 2NP, which is attributed to proper bandgap match between black BiOCl and Bi 2 O 3 , multiple charge transfer channels via Bi-bridge and rGO, and efficient charge separation. Of special importance, black BiOCl-Bi-Bi 2 O 3 /rGO heterojunction can effectively treat real industrial wastewater with 70.3% COD removal efficiency, and it shows superior long-term stability. Additionally, a possible photocatalytic mechanism of black BiOCl-Bi-Bi 2 O 3 /rGO heterojunctions based on multiple charge transfer channels was proposed.
研究领域:
材料科学
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环境科学
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化学
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高影响因子
危险品化学品经营许可证（带存储）