Materials Today Chemistry
·
2022
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IF 7.613
W. Li,M. Gan,L. Ma,W. Zhao,W. Zhan,S. Deng,F. Xie
A highly active and stable anode catalyst for direct methanol fuel cells is critical to commercialization. Therefore, we have synthesized a unique Fe-doped catalyst Fe–PtBi 2 /Bi 2 O 2 CO 3 -NC through the classical hydrothermal method and sodium borohydride reduction. Physical characterizations confirm the existence of Bi 2 O 2 CO 3 nanosheets and successful loading of PtBi nanocages. It is the alternating layer arrangement of Bi 2 O 2 CO 3 , the bifunctional mechanism of PtBi alloy and the synergistic effect of each component that make the synthesized Fe–PtBi 2 /Bi 2 O 2 CO 3 -NC possess such remarkable methanol oxidation reaction activity (a mass activity of 9345 mA/mg Pt in alkaline electrolyte). Moreover, electrochemical measurements also indicate that 51.7% of the mass activity was retained after 1 h durable operation, which is approximately 4.1 times than that of commercial Pt black. Fe–PtBi 2 /Bi 2 O 2 CO 3 -NC may be applied as a promising alkaline anode catalyst for direct methanol fuel cells due to its outstanding structure and performance. The specific work provides a reference for designing reliable structures and selection of doping elements to enhance the sluggish kinetics of methanol electrooxidation.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
RARE METALS
·
2024
·Vol. 43
·期 8
·3634-3646
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IF 9.6
He Pu-Qiang,Guo Jun,Huang Hui,Guo Zhong-Cheng
Bismuth-based anode materials have been regarded as promising Li-ion batteries due to their high theoretical capacity. However, their low conductivity and associated volume expansion inhabited their commercialization. In this work, Bi 2 O 2 CO 3 @C composites were successfully synthesized by in situ anchoring of flower-like Bi 2 O 2 CO 3 nanosheets on a carbon-based substrate via hydrothermal. The unique composited structure of Bi 2 O 2 CO 3 @C leads to a stable specific capacity of 547 mAh·g −1 after 100 cycles at a current density of 0.1 A·g −1 . Notably, it demonstrates excellent rate capability with a specific capacity of 210 mAh·g −1 at 5 A·g −1 . After 550 cycles at a current density of 0.5 A·g −1 , a high reversible capacity of nearly 400 mAh·g −1 was observed. Additionally, in situ X-ray diffraction measurements clearly demonstrate the conversion between Bi and Li 3 Bi during alloying/dealloying, confirming the good electrochemical reversibility of the materials for Li storage. The reaction kinetics of Bi 2 O 2 CO 3 @C were further investigated using galvanostatic intermittent titration technique. Furthermore, Bi 2 O 2 CO 3 @C exhibited excellent long-term stability, maintaining its high reversible capacity for over 200 cycles at a current density of 0.5 A·g −1 in a full cell configuration using Li 1.20 Mn 0.54 Ni 0.13 Co 0.13 O 2 as the cathode material. This result further underscores its promising potential for lithium-ion batteries. This work may provide inspiration for the design of alloy-type negative electrode materials for high-performance rechargeable batteries. Graphical abstract
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
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IF 21.1
Xin Li,Jun-Hao Wang,Zhao-Lu Feng,Jiang Shao,Hao Dong,Chen Li,Ya-Wen Zhang
The electroreduction of CO 2 to value-added chemicals is a lucrative route to simultaneously achieve renewable energy conversion and mitigate the greenhouse effect. Herein, an in-situ derived Bi 2 O 2 CO 3 /CeO 2 heterostructure is exquisitely constructed, which can produce formate with the faradaic efficiency of 98.6 % in ultra-broad potential windows of 3000 mV, and directly generate pure formic acid with the highest selectivity of 95.2 % and the maximal energy efficiency of 53.9 % in the neutral solid-electrolyte cell, surpassing most of the reported results and demonstrating the potential for future industrialization. The experimental and theoretical results indicate that the CeO 2 with abundant oxygen vacancies is conducive to facilitating the dissociation of water, serving as the source of active hydrogen species in the heterostructure. The Bi 2 O 2 CO 3 is used to effectively activate CO 2 and fast hydrogenate the crucial *OCHO-to-*OCHOH step accelerated by adequate supply of active hydrogen species. Thus, the heterostructure synergistically promotes the efficient conversion of CO 2 to cost-effective formic acid/formate products. As a result, this work provides a fundamental understanding and detailed exposition of Bi-based catalysts for highly selective CO 2 reduction and offers a unique but universal strategy for rational design and in-situ synthesis of heterostructure materials in various fields of energy storage and conversion.
研究领域:
能源化学
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催化材料科学
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DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2021
·Vol. 40
·期 2
·247-255
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IF 6
Qian Wang,Huanshun Yin,Yunlei Zhou,Lulu Cao,Zhengkun Yu,Yamin Xu,Shiyun Ai
Comprehensive Summary As a key epigenetic modification, 5-formylcytosine (5fC) controls many important cell functions, such as gene expression and cell differentiation. However, 5fC exists in mammalian tissues and cells with low content, and its structure is highly similar to 5-methylcytosine (5mC), 5-hydroxymethylcytosine (5hmC) and 5-carboxycytosine (5caC), which requires the detection method for detecting 5fC with high sensitivity and specificity. In this experiment, WS 2 /Bi/Bi 2 O 2 CO 3 was used as the photoactive material, 5fC antibody was used as the target molecule recognition reagent, and rolling amplification (RCA) was employed as the signal amplification strategy to construct a novel photoelectrochemical biosensor for detecting 5-formylcytosine deoxynucleotide (5fdCTP). Firstly, WS 2 /Bi/Bi 2 O 2 CO 3 nanocomposite was prepared and characterized, and then modified on the ITO electrode. Then, polyacrylic acid (PAA) was immobilized by electrostatic adsorption, which was employed as the antibody capture reagent based on the covalent reaction of –COOH on PAA with –NH 2 on Ab. Subsequently, 5fdCTP was recognized through immunoreaction, triggering the subsequent rolling circle amplification reaction with the aid of the crosslinker of Zr 4+ . Finally, positive methylene blue (MB) was adsorbed by negative ssDNA, resulting in an increased photoelectric conversion efficiency of WS 2 /Bi/Bi 2 O 2 CO 3 and improved detection sensitivity. The linear range of the PEC biosensor for detecting 5fdCTP was 0.05—100 nmol/L, and the minimum detection concentration was 12.4 pmol/L (S/N = 3). The applicability of this method has been evaluated by studying the influence of Cd 2+ and antibiotic concentration on the 5fC content in the genomic DNA of maize seedlings.
研究领域:
生物化学
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分子生物学
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分析化学
✓ 已验证
DOI
高影响因子
Materials Today Nano
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2023
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IF 10.3
Luchen Ai,Huanshun Yin,Suo Wang,Jun Wang,Xiaolong Gao,Xianqiang Yin,Kunpeng Dou,Peng Ju,Huimin Sun
To improve the photocatalytic activity of BiOF under simulated sunlight irradiation, a ternary Bi-based Z-scheme heterojunction of Bi/BiOF/Bi 2 O 2 CO 3 nanosheets were prepared using one-pot hydrothermal technique, where N, N-dimethylformamide was used as carbon source for Bi 2 O 2 CO 3 and reductant for metal Bi, bismuth nitrate was employed as Bi source and NaF was used as F source. The photocatalytic activity of Bi/BiOF/Bi 2 O 2 CO 3 was improved greatly towards ciprofloxacin degradation with the reaction kinetic constant of 0.0649 min −1 , which was 7 and 3.5 times to that of BiOF and Bi 2 O 2 CO 3 , respectively. The improved photocatalytic activity was ascribed to the surface plasmon resonance effect of metal Bi and the synergistic effects of BiOF/Bi 2 O 2 CO 3 Z-scheme heterojunction, which facilitated the migration of the photogenerated electron and inhibited the recombination of photogenerated e − /h + pairs. The degradation mechanism and charge transfer pathway were confirmed. This work expands the application of BiOF-based photoactive materials in environmental field.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2023
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IF 6.9
Xiaoge Wu,Lei Yan,Rongrong Qin,Qikai Zhang,Wei Yang,Xiaozhi Wang,Yongcai Zhang,Min Luo,Jianhua Hou
Bi 2 O 2 CO 3 (BOC)/Bi 4 O 5 Br 2 (BOB)/reduced graphene oxide (rGO) Z-scheme heterojunction with promising photocatalytic properties was synthesized via a facile one-pot room-temperature method. Ultra-thin nanosheets of BOC and BOB were grown in situ on rGO. The formed 2D/2D direct Z-scheme heterojunction of BOC/BOB with oxygen vacancies (OVs) effectively leads to lower negative electron reduction potential of BOB as well as higher positive hole oxidation potential of BOC, showing improved reduction/oxidation ability. Particularly, rGO is an acceptor of the electrons from the conduction band of BOC. Its dual roles significantly improve the transfer performance of photo-induced charge carriers and accelerate their separation. With layered nanosheet structure, rich OVs, high specific surface area, and increased utilization efficiency of visible light, the multiple synergistic effects of BOC/BOB/rGO can achieve effective generation and separation of the electron-holes, thereby generating more •O 2 − and h + . The photocatalytic reduction efficiency of CO 2 to CO (12.91 µmol/(g·hr)) is three times higher than that of BOC (4.18 µmol/(g·hr)). Moreover, it also achieved almost 100% removal of Rhodamine B and cyanobacterial cells within 2 hours.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
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IF 19.503
Lingsong Wang,Huanshun Yin,Suo Wang,Jun Wang,Shiyun Ai
Bi/BiOCl/Bi 2 O 2 CO 3 heterojunction was prepared via one-step hydrothermal process under the synergistic catalysis of Ni 2+ , where Bi(NO 3 ) 3 was employed as Bi source, DMF was used as carbon source and reductant, NiCl 2 was adopted as Cl source and co-catalyst. The content of Bi, BiOCl and Bi 2 O 2 CO 3 can be adjusted by changing the reaction time, temperature, content of DMF and NiCl 2 . The doping of Bi enhanced the photocatalytic activity of BiOCl/Bi 2 O 2 CO 3 under visible-light. Bi/BiOCl/Bi 2 O 2 CO 3 presented photo-degradation activity for environmental pollutants of rhodamine B, sunset yellow and tetracycline, which were 13.01, 9.40, 1.50 times and 168.38, 10.90, 4.75 times higher than BiOCl and Bi 2 O 2 CO 3 , respectively. The improved photocatalytic activity was ascribed to the sensitized effect of Bi and BiOCl, the surface plasmon resonance effect and the heterojunction structure, which inhibited the recombination of photogenerated electron-hole pairs. The degradation mechanism for rhodamine B was discussed, and the decreased toxicity of the degradation products was demonstrated.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Environmental Technology & Innovation
·
2021
·
IF 5.263
Lihua Liu,Gang Su,Xing Liu,Wenhao Dong,Mengyuan Niu,Qiujuan Kuang,Anping Tang,Jianrong Xue
A novel magnetic core–shell architecture Fe 3 O 4 @Sio 2 @Bi 2 O 2 CO 3 –sepiolite composite was successfully fabricated by coating a layer of Bi 2 O 2 CO 3 –sepiolite mixture onto Fe 3 O 4 @Sio 2 cores through a facile hydrothermal method. The photodegradation rates of ciprofloxacin (CIP) and tetracycline hydrochloride (TC-H) were 92.1% and 100%, respectively. A suitable amount of sepiolite in Fe 3 O 4 @Sio 2 @Bi 2 O 2 CO 3 –sepiolite can enlarge the specific surface area, promote the formation of an excellent photocatalyst structure, and generate a strong interfaces effect between the sepiolite and Fe 3 O 4 @Sio 2 @Bi 2 O 2 CO 3 . This condition endowed the as-prepared photocatalyst with high light harvesting capability and abundant active reaction sites. It also boosted the separation of photogenic e − /h + pairs. Moreover, this condition inhibited the recombination of e − /h + pairs and decreased the energy band gap, thereby enhancing the visible light catalytic degradation of antibiotics. The active species produced during photocatalysis included h + and •O 2 − , with h + as the dominant active species. The as-prepared photocatalyst exhibited excellent photocatalytic degradation activity, magnetic separation performance, recyclability , and stability.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2023
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IF 8.8
Kexue Liu,Na Li,Jia Ding,Na Chen,Suo Wang,Qian Wang,Xiangfeng Yao,Xianxu Li,Jun Wang,Huanshun Yin
Bi 2 O 2 CO 3 /Bi 2 S 3 heterojunction was prepared by one-step hydrothermal method, where Bi(NO 3 ) 3 was employed as Bi source, Na 2 S was used as a sulfur source, and CO(NH 2 ) 2 was adopted as C source. The load of Bi 2 S 3 was adjusted by changing the content of Na 2 S. The prepared Bi 2 O 2 CO 3 /Bi 2 S 3 illustrated strong photocatalytic activity towards dibutyl phthalate (DBP) degradation. The degradation rate was 73.6% under the irradiation of visible light for 3 h, which were 3.5 and 1.87 times for Bi 2 O 2 CO 3 and Bi 2 S 3 , respectively. In addition, the mechanism for the enhanced photoactivity was investigated. After combined with Bi 2 S 3 , the formed heterojunction structure inhibited the recombination of photogenerated electron-hole pair, improved the visible light adsorption, and accelerated the migration rate of the photogenerated electron. As a result, analysis of the radical formation and the energy band structure revealed that Bi 2 O 2 CO 3 /Bi 2 S 3 was consistent with the S-scheme heterojunction model. The S-scheme heterojunction allowed the Bi 2 O 2 CO 3 /Bi 2 S 3 to possess high photocatalytic activity. The prepared photocatalyst presented acceptable cycle application stability. This work not only develops a facile one-step synthesis technique for Bi 2 O 2 CO 3 /Bi 2 S 3 , and also provides a good platform for the degradation of DBP.
研究领域:
材料科学
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环境科学
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化学
·
光催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
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IF 9.7
Wenlin Wang,Xianling Wang,Gang Li,Xiuting Wu,Qian Yu,Yan Wang,Xinjie Zhao,Jia Gao,Jing Wang
The design of heterojunction and active crystal face is an effective way to promote the separation and migration of photogenerated charge in the process of photocatalytic reaction. In this work, the band gap intercalation Bi 3 O 4 Br/Bi 2 O 2 CO 3 /g-C 3 N 5 (BBC) ternary photocatalyst was successfully designed by one step hydrothermal method. It is found that under alkaline conditions, the addition of g-C 3 N 5 to Bi 3 O 4 Br leads to the preferential growth of the (0 0 1) crystal face of the third phase Bi 2 O 2 CO 3 , and the (0 0 1) crystal face is the active crystal face of the photocatalytic reaction. In addition, the constructed double Z-scheme heterojunction has two different electron transport pathways and bidirectional interface electric fields, which reduces the electron-hole pair recombination rate, maintains a strong redox ability, and enables the photogenerated carrier to effectively separate and transfer, thus improving the catalytic activity of the material. Under visible light irradiation, 15 %BBC presented excellent catalytic activity, the degradation rates of ARB ( k = 0.0238 min −1 ), HCl-TC ( k = 0.0183 min −1 ) and RHB ( k = 0.0200 min −1 ) exceeded 90 % within 120 min. This work is not only of great significance for the purification of water pollution, but also provides a new way for further exploration of novel composite photocatalytic systems.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2018
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IF 11.698
Penghui Ding,Jun Di,Xiaoliu Chen,Junze Zhao,Kaizhi Gu,Yi Zhang,Sheng Yin,Gaopeng Liu,Jiexiang Xia,Huaming Li
Light-mediated reactive oxygen species generation with water and oxygen is generally regarded as a mild and efficient way for organic pollutants removal. However, it is highly difficult but desirable to construct a photochemical system with increased reactive oxygen species production. Herein, by using Bi 2 O 2 CO 3 as a prototype, we devise a simple metal chloride-involved etching method to achieve better light absorption and charge carriers separation in a wide-band-gap semiconductor, thus giving rise to improved molecular oxygen activation. The improved photoinduced reactive oxygen species production is further verified by excellent photocatalytic degradation ability of RhB, TC and BPA under visible and ultraviolet light illumination. In addition, the metal chloride-induced strategies—heterojunction formation and cation doping—significantly affect the dynamics and transfer of carriers, which are advantageous to manipulate one-/two-electron pathway for producing reactive oxygen species.
研究领域:
环境科学
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材料科学
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光化学
·
催化
✓ 已验证
DOI
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 .
研究领域:
材料科学
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化学
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环境科学
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农业科学
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植物病理学
✓ 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）