RESEARCH ON CHEMICAL INTERMEDIATES
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2018
·Vol. 44
·期 5
·3061-3079
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IF 1.674
Wang Junxiu,Chen Kuan,Shen Yi,Wang Xi,Guo Yongfu,Zhou Xiaoji,Bai Renbi
Abstract To heighten the absorption to visible light and improve photocatalytic degradation to organic pollutants, a novel photocatalyst of m-Bi 2 O 4 /Bi 2 O 2 CO 3 was constructed through a facile hydrothermal method. The crystal structure, optical properties, morphology, composition and photocatalytic ability of the photocatalysts were characterized via X-ray diffraction, Fourier transform infrared spectroscopy, ultraviolet–visible diffuse reflectance spectroscopy, field emission scanning electron microscopy, energy dispersive spectroscopy, transmission electron microscope (TEM), high resolution TEM, selected-area electron diffraction and X-ray photoelectron spectroscopy technologies. The as-prepared photocatalysts could efficiently degrade rhodamine B and mixed dye under visible light. The removal rate was up to 95.3% within 50 min. The results demonstrated that m-Bi 2 O 4 /Bi 2 O 2 CO 3 photocatalysts showed outstanding photocatalytic degradation ability compared to the single photocatalyst with the narrow band gap. In addition, photocurrent response tests certified that the heterostructure of the photocatalysts effectively accelerated the separation and migration of photo-induced electrons and holes. Active species trapping experiments indicated that holes (h + ) and superoxide radical (•O 2 − ) were major species rather than hydroxyl radicals (•OH) during the degradation process of organics. According to the test results, a probable photocatalytic mechanism was proposed. This work provided a new and efficient photocatalyst for environmental remediation and water treatment. Graphical Abstract
研究领域:
环境科学
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材料科学
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化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Mengwei Han,Yuzhu Qian,Xinni Li,Nailiang Wang,Ting Song,Li Liu,Xianyou Wang,Xiongwei Wu,Man-Kay Law,Bei Long
Developing insertion-type anode is key to advancing “rocking chair” zinc-ion batteries, though there are few reported insertion-type anodes. Herein, the Bi 2 O 2 CO 3 is a high-potential anode, with a special layered structure. A one-step hydrothermal method was used to prepare Ni-doped Bi 2 O 2 CO 3 nanosheet , and also a free-standing electrode consisting of Ni-Bi 2 O 2 CO 3 and CNTs was designed. Both cross-linked CNTs conductive networks and Ni doping improve charge transfer. Ex situ tests (XRD, XPS, TEM, etc.) reveal the H + /Zn 2+ co-insertion mechanism of Bi 2 O 2 CO 3 and that Ni doping improves its electrochemical reversibility and structural stability. Therefore, this optimized electrode offers a high specific capacity of 159 mAh g −1 at 100 mA g −1 , a suitable average discharge voltage of ≈0.400 V, and a long-term cycling stability of 2200 cycles at 700 mA g −1 . Besides, the Ni-Bi 2 O 2 CO 3 //MnO 2 “rocking chair” zinc-ion battery (based on the total mass of cathode and anode) delivers a high capacity of ≈100 mAh g −1 at 50.0 mA g −1 . This work provides a reference for designing high-performance anode in zinc-ion batteries.
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
Science China-Materials
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2023
·Vol. 67
·期 1
·162-169
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IF 8.1
Yang Bixia,Zhu Mengyao,Jiang Xingpeng,Shao Wenlei,Wang Zhiqi,Yan Jiawei,Zheng Yanting,Zhuang Zanyong,Yu Yan
The photooxidation of renewable bioderivatives into value-added chemicals is highly significant; however, it typically exhibits low selectivity owing to the challenges in controlling the oxidative species and managing the desirable reaction pathways. In this work, we used the Bi 2 O 2 CO 3 /ZnIn 2 S 4 heterostructure, prepared by a CO 2 -mediated solid–solid phase transition, to catalyze the photooxidation of bioderived 5-hydroxymethylfurfural (HMF) into 2,5-diformylfuran (DFF) with a high selectivity of 98.1% and a yield rate of 882.6 µmol g −1 h −1 . The metal carbonate/oxide heterointerface enables the effective transfer of photoactive electrons and holes, optimizes surface oxygen activation, and facilitates the synergy of ·OOH and holes to selectively convert HMF into DFF. The findings unravel how the tailoring and coupling of the electron–hole pairs and reactive oxygen species on heterostructured materials can promote the usage of renewable feedstocks for sustainable development.
研究领域:
光催化
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环境化学
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材料科学
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绿色化学
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可再生能源
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DOI
高影响因子
ENVIRONMENTAL RESEARCH
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2024
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IF 7.7
Suo Wang,Changyu Li,Huanshun Yin,Bin Gao,Zhengkun Yu,Yunlei Zhou,Jun Wang,Hongxia Xu,Jichun Wu,Yuanyuan Sun
Currently, achieving dual applications of Bi 2 O 2 CO 3 -based photocatalysts in photocatalytic degradation and sterilization under visible-light conditions is challenging. In this study, a novel Ag/Bi/Bi 2 O 2 CO 3 visible-light photocatalyst with bimetallic doping and rich oxygen vacancies was successfully synthesized using a one-pot hydrothermal crystallization method. The existence of oxygen vacancies was verified by X-ray photoelectron spectroscopy (XPS) and Electron spin resonance (ESR) analysis. The experimental results showed that Ag/Bi/Bi 2 O 2 CO 3 killed ∼100% (log 7) of antibiotic-resistant Escherichia coli (AR- E. coli ) within 60 min and degraded 83.81% of tetracycline (TC) within 180 min under visible light irradiation. Moreover, Ag/Bi/Bi 2 O 2 CO 3 can still remove 61.07% of TC in water after 5 cycles, showing excellent photocatalytic cycle stability and reusability. The possible degradation pathway of TC was determined by liquid chromatography-mass spectrometry. It was found that the main active substances in the photocatalytic disinfection of AR- E. coli were 1 O 2 , h + , and ·OH, while 1 O 2 was the dominant active species in the photocatalytic degradation of TC. This study presents a promising Bi 2 O 2 CO 3 -based visible light photocatalyst for treating both antibiotics (TC) and antibiotic-resistant bacteria (AR- E. coli ) in water.
研究领域:
环境科学
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材料科学
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化学
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水处理
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光催化
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DOI
PubMed
高影响因子
CHEMOSPHERE
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2023
·
IF 8.8
Kexue Liu,Chunliu Liang,Huijuan Lv,Xiangfeng Yao,Xianxu Li,Jia Ding,Na Chen,Suo Wang,Wenrong Liu,Xue Hu,Jun Wang,Huanshun Yin
As a kind of plasticizer , butyl benzyl phthalate (BBP) presents a serious hazard to the ecosystem. Therefore, there is a strong need for an effective technique to eliminate the risk of BBP. In this work, a new photocatalyst of Bi/Bi 2 O 2 CO 3 /Bi 2 S 3 with an S-scheme heterojunction was synthesized using Bi(NO 3 ) 3 as the Bi source, Na 2 S as the S source, and DMF as the carbon source and reductant. Numerous techniques have been used to characterize Bi/Bi 2 O 2 CO 3 /Bi 2 S 3, such as scanning electron microscopy, high-resolution transmission electron microscopy , X-ray diffraction, and X-ray photoelectron spectroscopy. The improved photoactivity of Bi/Bi 2 O 2 CO 3 /Bi 2 S 3 was evaluated by photoelectrochemical response, electrochemical impedance spectroscopy, photoluminescence , UV–Vis diffuse reflectance spectroscopy, and electrochemical Mott Schottky spectroscopy. The enhanced photocatalytic activity of this composite for BBP degradation under simulated sunlight irradiation could be attributed to the surface plasmon resonance effect of Bi metal and the heterojunction structure of Bi 2 O 2 CO 3 and Bi 2 S 3 . The degradation rate of Bi/Bi 2 O 2 CO 3 /Bi 2 S 3 was 85%, which was 4.52 and 1.52 times that of Bi 2 O 2 CO 3 and Bi 2 S 3 , respectively. The prepared photocatalyst possessed good stability and reproducibility in eliminating BBP. The improved photocatalytic activity of Bi/Bi 2 O 2 CO 3 /Bi 2 S 3 was demonstrated with the formation of an S-scheme heterojunction, and the degradation mechanism was discussed with a liquid chromatograph mass spectrometer .
研究领域:
环境科学
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材料科学
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化学工程
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DOI
PubMed
高影响因子
Journal of Physical Chemistry C
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2020
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IF 4.189
Tiantian Zhou,Haonan Zhang,Xin Zhang,Wensheng Yang,Yongqiang Cao,Ping Yang
BiOI/Bi2O2CO3 two-dimensional (2D) heteronanostructures (HNSs) have been crafted by the simple but effective ion-exchange technique in this work. Besides the routine advantages of pristine 2D materials, including the more surface-reactive sites, larger surface area, and short distance for the carriers to transfer from the material interior to the surface, the larger heterointerface of BiOI/Bi2O2CO3 2D HNSs could further promote the separation of photoinduced electron–hole pairs because of the built-in electric field in the junction, giving rise to their ultrahigh activities compared to the pristine and conventional composite samples. The in situ growth model of 2D HNSs via ion exchange endowed the HNSs with decreased distance of interfacial carrier transfer and energy barrier, together with superhigh structure stability, which was also beneficial to charge separation. The highest apparent rate constants of BiOI/Bi2O2CO3 2D HNSs for visible-light degradation of RhB can reach up to 4.4, 5.3, and 2.8 times (5.1, +∞, and 4.7 times for salicylic acid (SA)) those of pure BiOI, Bi2O2CO3, and conventional BiOI/Bi2O2CO3 complex photocatalysts, respectively. This enhanced charge carrier separation behavior was detailedly born out by the characterizations of photocurrent density, electrochemical impedance, and steady-state and time-resolved photoluminescence, along with selective photo-oxidation/-reduction depositions of metallic oxide and noble metals. Hopefully, BiOI/Bi2O2CO3 2D HNSs can also be applied to photosynthesis, solar cells as well as electrocatalysis and provide a paradigm for exploration in other two-dimensional HNS nanomaterials.
研究领域:
材料科学
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纳米技术
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光化学
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环境科学
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DOI
高影响因子
Surfaces and Interfaces
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2023
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IF 6.2
Suo Wang,Huanshun Yin,Jia Ding,Haodong Chen,Lingsong Wang,Yunlei Zhou,Kexue Liu,Jun Wang
Bi/BiOBr/Bi 2 O 2 CO 3 heterojunction was synthesized by one-pot hydrothermal method using DMF as carbon source for Bi 2 O 2 CO 3 and reducing agent for Bi 3+ , NaBr as bromine source and Bi(NO 3 ) 3 as bismuth source. The photocatalytic properties were evaluated with photodegradation of rhodamine B, tetracycline and oxytetracycline under visible light with the degradation efficiency of 99.83% ( k = 0.5843 min −1 , 9 min), 81.75% ( k = 0.0247 min −1 , 60 min) and 70.23% ( k = 0.0225 min −1 , 60 min), respectively. The enhanced photoactivity is ascribed to the increased separation efficiency of photogenerated electron-hole pair and improved electron migration rate, causing by strong visible-light adsorption, surface plasmon resonance of Bi nanoparticles and the matched energy band between BiOBr and Bi 2 O 2 CO 3 . In addition, as nitrogen-containing organic pollutants of rhodamine B, tetracycline and oxytetracycline, N element was proved to form ammonium under photocatalysis with indoxyl blue method. More importantly, this work also evaluated the ecotoxicological effects of pollutant, indicating the decreased ecotoxicological effects of pollutant after degradation.
研究领域:
环境科学
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材料科学
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化学工程
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毒理学
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DOI
高影响因子
Materials
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2018
·Vol. 11
·期 5
·791
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IF 2.467
Junping Ding,Huanchun Wang,Haomin Xu,Lina Qiao,Yidong Luo,Yuanhua Lin,Cewen Nan
High efficiency photocatalyst Bi2O2(CO3)1−xSxwas synthesized conveniently with chemical bath precipitation using Bi2O2CO3as the precursor. The microstructures of the samples are systematically characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS) and UV-Vis spectroscopy; the optical and photocatalytic properties are carefully tested as well. The content ofS, which was tuned through the controlling of the precipitation process, was verified to have an intense effect over the photocatalytic properties. A nearly saturatedSratio and the best photocatalytic performance were observed in specimens with the mostScontent. Our study reveals that, with negligible influence of the morphology and crystal structure, Bi2O2(CO3)1−xSxpossessed a broadened optical absorption regionfromultraviolet to visible light, and enhanced photocatalytic activity in comparison to precursor Bi2O2CO3in photocatalytic degradation of Congo Red aqueous solution.Keywords:Bi2O2CO3;Bi2O2(CO3)1−xSx;broadband spectra;photocatalysis
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
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Wenhui Zhou,Yue Zhao,Boxu Dong,Hongran Guo,Ziqi Si,Fengxiang Ma,Shan Zhu,Jiantao Zai,Xuefeng Qian
Sulfur hexafluoride (SF 6 ), widely used in industries, poses a significant threat as the strongest greenhouse gas. Current methods for degrading SF 6 are hindered by high energy consumption and costs, thus there is an urgent need for a low-cost, convenient, and efficient solution. In response, we established a gas-liquid-solid three-phase (GLS) system for efficient photocatalytic SF 6 degradation by Bi 2 O 2 CO 3 , whose efficiency was approximately 20 times that of traditional gas-solid systems. Further, possible degradation mechanisms were demonstrated through the detection of material changes in three phases, respectively. Detailed studies revealed Bi 2 O 2 CO 3 can in-situ form Bi 2 S 3 heterojunction during the reaction, facilitating carrier separation. Besides, O 2 can transform to ·O 2 − and accelerate the photodegradation process. This approach offered a novel toolbox for SF 6 degradation. We predict this method will have a wider range of applications in the field of solar-powered catalytic degradation of extremely stable fluorinated pollutants at lower costs in the future.
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
APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
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IF 14.229
Xin Hu,Huiping Zhao,Ying Liang,Rong Chen
Solar-driven molecular oxygen activation is of great importance for reactive oxygen species (ROS) production in environmental remediation. In this work, a convenient bromine doping strategy was developed to mediate the energy level of Bi 2 O 2 CO 3 for molecular oxygen activation. The band structure and DFT calculation demonstrate that the Fermi level of Bi 2 O 2 CO 3 elevates after bromine doping, which promotes the molecular oxygen activation and ROS production. The Br-doped Bi 2 O 2 CO 3 exhibits remarkably enhanced photocatalytic ability and could degrade 95% of the ciprofloxacin within 30 min. Moreover, HPLC-MS analysis elucidates that the pyrrolidone ring degradation process is the dominate pathway in ciprofloxacin degradation over Br-doped Bi 2 O 2 CO 3 , resulting in the decrease of antimicrobial activity of the degradation products and the risk of drug-resistance. This work not only provides a molecular oxygen activation strategy via energy level mediation, but also helps us to further understand the relationship between the elemental doping and molecular oxygen activation.
研究领域:
环境科学
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材料科学
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化学
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DOI
高影响因子
ACS Applied Energy Materials
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2022
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IF 6.959
XiaoYa Hao,Qiong Fu,YaFei Hou,YuanJie Yan,TingYu Fu,Jing Cuan,Peng Du,LaiHui Luo,WeiPing Li
Both high discharge energy density (Ud) and charge–discharge efficiency (η) for nanocomposites are crucial to the development and application of modern electronic devices. However, the large dielectric contrast and ferroelectric phase greatly limit the improvement of Ud and η of poly(vinylidene fluoride) (PVDF)-based nanocomposites. Herein, Bi2O2CO3 (simplified as BOC) nanosheets with low dielectric constant and wide bandgaps and linear poly(methyl methacrylate) (PMMA) were filled into PVDF by solution casting to fabricate x vol % BOC/PAPF (PAPF is short for PMMA/PVDF) nanocomposites. The contributions of BOC nanosheets and linear PMMA, especially for the BOC nanosheet, have been systematically studied. Both experimental and simulation results show that BOC nanosheet and PMMA could improve the breakdown strength and reduce the dielectric loss and leakage current of nanocomposites simultaneously, realizing Ud and η improvement at the same time. As a result, the 1.0 vol % BOC/PAPF nanocomposite shows the highest energy storage performance with Ud = 13.68 J/cm3 and η = 85.72%, which is much superior to PVDF. Therefore, this study might provide a proof-of-concept for constructing nanocomposites with excellent Ud and η concurrently.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Dongfeng Sun,Luo Huang,Li Li,Yuan Yu,Gaohui Du,Bingshe Xu
This paper presented the plasmonic Bi in-situ deposited on the surface of Bi 2 O 2 CO 3 nanoplates forming plasma enhanced Bi/Bi 2 O 2 CO 3 heterojunction photocatalyst through a facile one-pot solvothermal method by using methanol as both solvent and carbon source. The water splitting efficiency of the as-prepared Bi/Bi 2 O 2 CO 3 heterojunction photocatalyst was much better than that of pure phase Bi 2 O 2 CO 3 due to the Bi nanoparticles surface plasma resonance (SPR) effect for promoting light response and the charge carriers separation and transfer. The experimental results also showed that the H 2 O played an important role in the fabrication of Bi/Bi 2 O 2 CO 3 heterojunction photocatalyst, furthermore, the content of Bi in Bi/Bi 2 O 2 CO 3 changed with the variation of additional H 2 O which impacted photocatalytic activities . The method of semimetal in-situ deposition without reductants in this work also provided new perspectives into the rational design and facile synthesis of bismuth based semiconductor photocatalysts.
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
PubMed
高影响因子
危险品化学品经营许可证（带存储）