CERAMICS INTERNATIONAL
·
2013
·
IF 1.789
Lianyi Shao,Songying Wang,Kaiqiang Wu,Miao Shui,Rui Ma,Dongjie Wang,Nengbing Long,Yuanlong Ren,Jie Shu
Comparison of (BiO) 2 CO 3 to CdCO 3 as anode materials is investigated in this paper. Electrochemical results show that both (BiO) 2 CO 3 and CdCO 3 are electrochemically active materials with high initial capacities of 1080.1 and 1251.1 mAh g −1 , respectively. Ex-situ X-ray diffraction (XRD) results show that the electrochemical reaction mechanisms of CdCO 3 with Li can be associated with the preliminary formation of Cd and Li 2 CO 3 upon the initial lithiation, and then the final formation of LiCd alloy upon further lithiation. In contrast, the electrochemical reaction of (BiO) 2 CO 3 with Li not only results in the formation of Bi and Li 2 CO 3 , but also induces the formation of Li 2 O. Besides, upon further lithiation, the alloying reaction of Bi with Li is a multi-step process to form LiBi, Li x Bi, and finally Li 3 Bi as confirmed by electrochemical behaviors and in-situ XRD technique. Compared with CdCO 3 , (BiO) 2 CO 3 can exhibit better electrochemical properties with a reversible capacity of 155.1 mAh g −1 and a capacity retention of 28.3% after 15 cycles. By introducing carbon black as conductive additive and volume change buffer, the reversible capacity of ball-milled (BiO) 2 CO 3 /C composite can be improved to the value of 297.6 mAh g −1 with a capacity retention of 47.8% after 15 cycles.
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
CHEMISTRY-A EUROPEAN JOURNAL
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2012
·Vol. 18
·期 51
·16491-16497
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IF 5.925
Fan Qin,Guangfang Li,Runming Wang,Jiliang Wu,Hongzhe Sun,Rong Chen
Graphical Uniform Bi 2 O 3 and (BiO) 2 CO 3 nanotubes were synthesized by a solvothermal method without involving any surfactants or templates. The synergistic effect of ethylene glycol and urea played a critical role in the formation of the tubular structure. The Bi 2 O 3 and (BiO) 2 CO 3 nanostructures not only exhibited excellent Cr VI -removal capacity, but also displayed high photocatalytic efficiency for the degradation of Rhodaine B under visible-light irradiation (see figure). Uniform bismuth oxide (Bi 2 O 3 ) and bismuth subcarbonate ((BiO) 2 CO 3 ) nanotubes were successfully synthesized by a facile solvothermal method without the need for any surfactants or templates. The synergistic effect of ethylene glycol (EG) and urea played a critical role in the formation of the tubular nanostructures. These Bi 2 O 3 and (BiO) 2 CO 3 nanotubes exhibited excellent Cr VI -removal capacity. Bi 2 O 3 nanotubes, with a maximum Cr VI -removal capacity of 79 mg g −1 , possessed high removal ability in a wide range of pH values (3–11). Moreover, Bi 2 O 3 and (BiO) 2 CO 3 nanotubes also displayed highly efficient photocatalytic activity for the degradation of RhB under visible-light irradiation. This work not only demonstrates a new and facile route for the fabrication of Bi 2 O 3 and (BiO) 2 CO 3 nanotubes, but also provides new promising adsorbents for the removal of heavy-metal ions and potential photocatalysts for environmental remediation.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Yinke Wang,Lujun Wang,Zixin Xiao,Shichao Liu,Jun Hu,Xinqi Long,Lixu Wu,Chun Sun,Kangbo Chen,Feipeng Jiao
A novel (BiO) 2 CO 3 /ZnFe-LDH photocatalyst was fabricated via a simple hydrothermal method for degradation of tetracycline aqueous solution. Due to the unique band structures of (BiO) 2 CO 3 and ZnFe-LDH, the combination of these two materials formed a Z-scheme heterojunction, which was conducive to the separation of photo-generated carriers. Through measuring the absorbance, it was found that the composite with 5% ZnFe-LDH has the optimal photocatalytic performance among all the samples. 98.09% of tetracycline (TC) was degraded after adsorption for 30 min and light irradiation for 90 min. In addition, the (BiO) 2 CO 3 /ZnFe-LDH composite displayed a remarkable reusability and stability in five successive runs. Based on the results of characterization and performance, a possible photocatalytic mechanism was proposed. This work would be helpful for the application of composites in the field of photocatalysis .
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2013
·
IF 2.206
Jiale Tang,Huiping Zhao,Guangfang Li,Zhong Lu,Shengqiang Xiao,Rong Chen
Different bismuth subcarbonate ((BiO)2CO3) hierarchical nanostructures assembled by nanoplates or nanosheets have been successfully synthesized via a simple hydrothermal route by properly monitoring experimental conditions. The synergistic effect of citrate ions, urea, and solvent is of crucial importance for the controllable fabrication of (BiO)2CO3 hierarchical nanostructures. The citrate ions play a key role in the assembly of 3D hierarchical nanostructures. The amount of urea could mediate the thickness of 2D structural units. The solvent could not only influence the thickness of the 2D structural unit but also mediate the structure and assembly of hierarchical nanostructures. On the basis of experimental observation, a possible formation process of (BiO)2CO3 hierarchical nanostructures was preliminarily proposed. The photocatalytic performance of the as-prepared (BiO)2CO3 hierarchical nanostructures was evaluated by the photodegradation of Rhodamine B (RhB) upon UV light irradiation. It indicated that loose-packed flower-like (BiO)2CO3 hierarchical nanostructures assembled by ultrathin nanosheets with large BET surface area and narrow band gap displayed the best photocatalytic activity and favorable recycling characteristics.
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
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2022
·
IF 4.644
Chun Sun,Yinke Wang,Lixu Wu,Jun Hu,Xinqi Long,Hongtao Wu,Feipeng Jiao
MgAl-LDH/(BiO) 2 CO 3 p-n heterojunction nanocomposite was prepared using a hydrothermal method . The as-prepared MgAl-LDH/(BiO) 2 CO 3 composites were characterized through XRD , SEM&EDX, TEM , FT-IR, XPS , as well as UV–vis DRS . The photodegradation activity of MgAl-LDH/(BiO) 2 CO 3 was examined through the degradation of tetracycline under visible light irradiation. The maximum degradation efficiency (97.2%) was achieved among the heterostructures when the percentage of MgAl-LDH was 15%. Moreover, the degradation efficiency of MgAl-LDH/(BiO) 2 CO 3 still reached 88% after five successive cycles. Furthermore, a photocatalytic mechanism involved was proposed by exploring its energy band structure . In this study, a novel method for photocatalytic degradation of tetracycline was proposed.
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
JOURNAL OF MATERIALS SCIENCE
·
2014
·Vol. 50
·期 4
·1594-1604
·
IF 2.305
Zhu Yingming,Xu Dandan,Meng Ming
A series of Bi 2 S 3 /(BiO) 2 CO 3 composite photocatalysts with different loadings of amorphous Bi 2 S 3 were successfully synthesized through an ultrasonic-assisted ion-exchange reaction between thioacetamide (CH 3 CSNH 2 ) and (BiO) 2 CO 3 , and characterized by XRD, XPS, BET, EELS, EDX, SEM, TEM/HRTEM, UV–Vis, and photoluminescence (PL) techniques. The results of TEM/HRTEM, EELS, and EDX indicate that the composite catalyst Bi 2 S 3 /(BiO) 2 CO 3 has been successfully synthesized with the deposited Bi 2 S 3 present in amorphous state on the surface of (BiO) 2 CO 3 . The activities of the catalysts for RhB degradation under visible light show that the catalyst prepared under ultrasonic is more active than the one synthesized without ultrasonic. The optimized sample Bi 2 S 3 /(BiO) 2 CO 3 (U5.0) exhibits a much higher activity, about 4.8 times to that of pure (BiO) 2 CO 3 . Based upon the band structures of Bi 2 S 3 /(BiO) 2 CO 3 , it is deduced that the migration of the visible light-induced electrons from the conduction band of Bi 2 S 3 to that of (BiO) 2 CO 3 should have facilitated the separation of photogenerated carriers, as confirmed by the suppressed photoluminescence spectra. Using different scavengers, the ·O 2
− and holes are clearly identified as the main oxidative species for RhB photodegradation. In light of these observations, a potential photocatalytic mechanism of RhB degradation over Bi 2 S 3 /(BiO) 2 CO 3 is proposed.
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
Sustainable Energy & Fuels
·
2024
·Vol. 8
·期 3
·564-572
·
IF 5
Jinfan Wu,Tao Wang,Fen Xu,Lixian Sun,Lumin Liao,Yuan Gao,Yanxun Guan,Hehui Wang,Guorong Zhang,Zhong Cao,Julan Zeng
A series of novel porous hydrogen-generation materials with the formulae Al–(BiO)2CO3, Al–4BiNO3(OH)2·BiO(OH), and Al–Bi2(SO4)3 were synthesized by ball milling and spark plasma sintering (SPS). Their hydrogen-production properties were investigated. The results revealed that doping Al–(BiO)2CO3 in aluminium powder was the most effective for improving the hydrogen-generation performance. The hydrogen-conversion yield and maximum hydrogen-generation rate (MHGR) of the Al–(BiO)2CO3 block reached 94.9% and 384.6 mL g−1 min−1, respectively. Mechanism study indicated that (BiO)2CO3 decomposed into Bi2O3 and CO2, and the produced Bi2O3 could react with Al to produce Bi and Al2O3in situ during the SPS process. Herein, the produced CO2 could also form a large number of holes in the bulk sample under the action of sintering pressure to obtain the porous Al–(BiO)2CO3 composite. The hydrogen-generation performance of Al–(BiO)2CO3 was thus substantially enhanced under the synergistic effect of these factors.
研究领域:
材料科学
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能源工程
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2018
·
IF 6.14
Penghui Ding,Jun Di,Xiaoliu Chen,Mengxia Ji,Kaizhi Gu,Sheng Yin,Gaopeng Liu,Fei Zhang,Jiexiang Xia,Huaming Li
In this study, S, N codoped graphene quantum dots/(BiO)2CO3 hollow microspheres have been fabricated by a facile electrostatic self-assembly method. The nanosized S, N:GQDs, which can be obtained by a bottom-up approach, are superior surface modification materials for photocatalytic applications due to their better electron transfer and peroxidase mimetic properties. The excellent oxidation property of the synthesized nanocomposite is confirmed by degradation of different model pollutants, such as rhodamine B, tetracycline, and bisphenol A under light irradiation or dark situation. Based on several experiments, the essential roles of S, N:GQDs can be described as (i) a photocarrier transport center strengthening photoinduced charge carriers (h+–e–) separation and (ii) an enzymatic-like catalysis center to accelerate H2O2 decomposition to produce ·OH because the surface accumulation of H2O2 is harmful for photocatalytic processes. The present work may pave the way for integrating enzymatic-like cocatalysis into a photocatalytic process to generate more reactive oxygen species, thus advancing the field of environmental remediation and synthetic chemistry.
研究领域:
环境科学
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材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
·
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
·
化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Yuefa Jia,Shiping Li,Jianzhi Gao,Gangqiang Zhu,Fuchun Zhang,Xianjin Shi,Yu Huang,Chunli Liu
NO removal is one of the most important issues in dealing with air pollution. In this report, Z-scheme (BiO) 2 CO 3 -BiO 2-x -graphene (BOC-BiO 2-x -GR) composite photocatalyst was designed for NO removal under simulated solar light irradiation. Characterizations of physical properties of the ternary composites revealed extended light absorption and high efficient electron-hole separation. Through the optimization of the BiO 2-x content, we observed that the BOC-BiO 2-x (35wt%)-GR composite exhibited superior photocatalytic activities in NO removal as compared to pure BOC, BiO 2-x , and BOC-BiO 2-x binary composites. Detailed microstructural observation showed that the BOC-BiO 2-x heterojunction was formed between BOC (013) and BiO 2-x (111) planes. The density of state (DOS) calculation revealed that due to the different hybridization conditions in the energy bands of BOC and BiO 2-x , the Z-scheme charge transfer should be dominant at the heterojunction interface. The density functional theory (DFT) computation on the Fermi level results confirmed that energy band structure between BOC and BiO 2-x is more in favor of the transfer of photo-generated electrons from CB of BOC to the VB of BiO 2-x , which can be further enhanced by highly conductive GR sheets. The electron spin resonance (ESR) experiments results show that O 2 − and HO were produced during the photocatalytic process, which further provided evidences that the BOC-BiO 2-x (35wt%)-GR composite works as a Z-scheme photocatalyst. This work indicates that Bi-based nanomaterials can be employed as a stable and high efficient solar light active photocatalyst for NO removal in air pollution control.
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
ACS Catalysis
·
2021
·
IF 13.084
Fei Rao,Gangqiang Zhu,Weibin Zhang,Yunhua Xu,Baowei Cao,Xianjin Shi,Jianzhi Gao,Yuhong Huang,Yu Huang,Mirabbos Hojamberdiev
Constructing oxygen vacancies (OVs) in metal-oxide semiconductors is an effective and simple way to enhance the photocatalytic performance via promoting the utilization of solar light and boosting the formation of surface reactive oxygen species (ROS). The presence of different oxygen atoms in the same crystal structure can possibly lead to the formation of different types of OVs with distinct physicochemical and optoelectronic properties. Particularly, the two different crystallographic positions of oxygen atoms in the [BiO]22+ layer of (BiO)2CO3 (BOC) allow the construction of two types of OVs (OVs1 and OVs2). In this work, OVs1-BOC and OVs2-BOC are synthesized via introducing the OVs1 and OVs2 on the surface of the BOC. The influence of OVs1 and OVs2 on the generation of ROS in the BOC is demonstrated based on theoretical and experimental studies by analyzing the separation and redox potentials of photogenerated charge carriers, absorption surface adsorbates (H2O and O2), and reaction active energy. The photocatalytic performance is evaluated by photo-oxidative nitric oxide (NO) removal efficiency under visible light irradiation. The OVs1-BOC and OVs2-BOC exhibit 50.0 and 41.6% photo-oxidative NO removal efficiencies, while generating 15.6 and 16.54 ppb NO2, respectively. The in situ Fourier transform infrared spectroscopy and estimated NO conversion pathway reveal the photo-oxidative NO removal mechanism and suppression of NO2 formation on the surfaces of OVs1-BOC and OVs2-BOC. This work demonstrates a straightforward approach for enhancing the photo-oxidative NO removal via manipulating the OV defect position in semiconductors.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
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