Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Nuo Zhang,Bingzhu Wang,Pengcheng Hu,Zhenxing Gao,Haiwang Wang
MCNTs-CdS has been identified as a promising material for photocatalytic hydrogen production due to its strong visible-light responsiveness and suitable energy band structure. However, the rapid complexation of its photogenerated electrons and holes makes its photocatalytic hydrogen production unsatisfactory. To address the above problem, MCNTs-CdS/Pt/ZnFe 2 O 4 composites were designed in this paper, and Pt was used as an electronic bridge to realize the fast transfer of electrons between the two semiconductors. The results show that the carrier transport resistance of MCNTs-CdS/Pt/ZnFe 2 O 4 system is greatly reduced, and the electron-hole separation rate is significantly better than that of MCNTs-CdS. In addition, the results of the photolysis of water hydrogen production demonstrated that when the deposition amount of Pt was 8 % and the mass ratio of MCNTs-CdS to ZnFe 2 O 4 was 1:0.1, the hydrogen production rate reached its maximum (1100.82 μmol/g/h), which was 35.51 times higher than that of MCNTs-CdS. The metal Pt functions as an electronic bridge to realize rapid electron transfer and MCNTs-CdS/Pt/ZnFe 2 O 4 form a Z-scheme carrier transport mechanism.
研究领域:
材料科学
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能源科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2017
·Vol. 42
·期 1
·489-496
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IF 3.269
Zengyu You,Qianhong Shen,Yuxuan Su,Yang Yu,Hui Wang,Tian Qin,Fang Zhang,Di Cheng,Hui Yang
A novel Z-scheme core–shell g-C3N4/MCNTs/BiOI heterojunction was successfully designed and fabricated through filling multi-walled carbon nanotubes (MCNTs) with g-C3N4, followed by the loading of BiOI on the outer surface of the MCNTs. The structure–property relationship was analyzed by X-ray diffraction (XRD), Fourier transform infrared spectra (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectra (DRS), photoluminescence spectra (PL), ESR probe tests and reactive species trapping measurements. The results show that the BiOI nanoparticles are uniformly loaded on the surface of the MCNTs which are fully filled by g-C3N4. The MCNTs connect the two semiconductors of g-C3N4 and BiOI, and serve as electron mediating conductors to promote the transfer of the photo-generated electrons, thereby constructing a Z-scheme heterojunction between g-C3N4 and BiOI. With this unique structure, enhanced visible-light photocatalytic activities are achieved because of the synergistic effect of light harvesting and improved separation efficiency of photo-generated carriers.
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
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Can Wang,Li Zhang,Guancheng Xu,Lifan Yang,Jinhui Yang
Developing non-noble and high activity electrocatalysts is the key to electrocatalytic water-splitting. Recently, MoS 2 shows vast perspectives due to its excellent catalytic performance and chemical stability in acid condition. Herein, to expand its application in different environment, a unique ternary composite MCNTs@CoS x @MoS 2 comprising three-dimensional lamellar heterostructure supported by multiwalled carbon nanotubes was successfully prepared by a two-step solvothermal strategy and used in electrocatalytic field. As a bifunctional electrocatalyst, heterostructure MCNTs@CoS x @MoS 2 could catalyst HER with a small overpotential of 196 mV and low Tafel slope of 65 mV dec −1 in acid condition and exhibit outstanding OER performance with a low overpotential of 285 mV and small Tafel slope of 76 mV dec −1 in alkaline solution. Meanwhile, it displayed excellent durability both in an acid and alkaline solution. The remarkable electrochemical performance of MCNTs@CoS x @MoS 2 can be attributed to novel construction advantages and synergy of MCNTs, small CoS x nanoparticles and lamellar MoS 2 . This work can be extended to the design and preparation of a series of composite materials with the advantage of structural diversity.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
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2022
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IF 4.291
Xiaojun Zhang,Sujun Yu,Manhong Li,Minglu Zhang,Chengwei Zhang,Man Wang
The structure and additives of ionic polymer-metal composite (IPMC) are important factors affecting its performance. Macropores and multi-walled carbon nanotubes (MCNTs) were introduced into multilayered IPMC actuators by an orderly mesh of silica spheres to enhance the IPMC actuator’s performance. The mechanical of membranes is improved a lot by the uniform combination of MCNTs and macroporous multilayered MCNTs/Nafion membrane. In particular, Young’s modulus for the macroporous multilayered MCNTs/Nafion membrane increases by 3.3 folds (from 262.6 MPa to 858.1 MPa), and the hardness increases by 4.4 folds (from 28.2 MPa to 123.9 MPa). Electromechanical results of the IPMC actuator increase respectively by 1.41 (33.5 mm) and 2.2 (19.2 mN) folds in the air under a DC voltage of 5 V, compared with typical IPMC actuators.
研究领域:
材料科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Yuan Ma,Bingzhu Wang,Haiwang Wang,Xingyuan Zhao,Yihao Zhao,Songyang Wu,Changxiang Xie
Zinc cadmium sulfide solid solution as a photocatalytic material has the advantages of narrow band gap and suitable conduction band potential, but the fast rate of photogenerated electron-hole recombination is a non-negligible problem. Inspired by the efficient transfer of bioelectric current between neuronal cells, we achieved the modulation of 1% MCNTs-Zn 0.3 Cd 0.7 S microscopic morphology by regulating the ratio of oleic acid and oleylamine during the hydrothermal process, and further constructed the photogenerated carrier transport pathway through the introduction of Pd to improve the rate of hydrogen production from photolytic water. The results showed that the addition of oleic acid and oleylamine resulted in higher crystalline aggregation and smaller peripheral size of the composite materials. The incorporation of both carbon nanotubes and Pd gives the composite's a high photoresponse as well as a low impedance. These are reflected in the photocatalytic hydrogen production rate: the photocatalytic hydrogen production rate of 1% MCNTs-Zn 0.3 Cd 0.7 S/4% Pd reaches 3.889 mmol/g/h, and its photocatalytic rate is 8.89 times higher than that of Zn 0.3 Cd 0.7 S.
研究领域:
材料科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2021
·
IF 6.057
Fei Li,Xiaoxuan Li,Jie Su,Yijun Li,Xiwen He,Langxing Chen,Yukui Zhang
In this work, a novel strategy to prepare molecularly imprinted polymers (MIPs) functionalized magnetic carbon nanotubes (MCNTs) via a facile sol-gel polymerization by adopting Cu 2+ -mediating interaction was presented for selective recognition of celastrol (Cel), in the traditional Chinese medicines (TCM). Firstly, template Cel, 3-aminopropyltriethoxysilane (APTES) as monomer and Cu 2+ (co-monomer) were mixed to form a self-assembled pre-complex, in which Cu 2+ could coordinate with Cel. Meanwhile, APTES plays a role of bridge between APTES and Cel. Secondly, carboxyl modified MCNTs as substrate was added into the pre-complex solution. After that, a multi-step sol-gel polymerization process was occurred in the presence of tetraethylorthosilicate as cross-linker and acetic acid as catalyst. Finally, MIPs layer was formed on the surface of the MCNTs (Cel-MIPs@MCNTs) after the removal of template with methanol/acetic. The morphology and structure of Cel-MIPs@MCNTs was investigated by various characterization techniques. The adsorption performance of Cel-MIPs@MCNTs to Cel was illustrated by kinetic, isothermal and selective binding experiments. The results displayed that the Cel-MIPs@MCNTs possessed fast kinetic equilibrium time (40 s), high adsorption capacity (13.35 μg mg −1 ), good imprinting factor of 3.41, and high magnetic responsivity (44.38 emu·g -1 ), which can be used as an ideal adsorbent for rapid isolation and enrichment of target analytes. A selective and sensitive method based on Cel-MIPs@MCNTs coupling with HPLC was developed for Cel determination including a wide linear range (0.15–200 μg mL −1 ) with correlation coefficient of 0.9998, a low limit of detection (0.05 μg mL −1 ). Furthermore, the applicability of Cel-MIPs@MCNTs was demonstrated to isolate and determine Cel in TCM samples with satisfactory recoveries ranged from 84.47% to 91.5% (RSD<5.35%). The results revealed that Cel-MIPs@MCNTs offer great potential as an adsorbent for selective and efficient isolation of Cel from complex TCM samples.
研究领域:
材料科学
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分析化学
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药学
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中医药
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）