Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 45
·22996-23002
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IF 7.443
Jing Bai,Yunpo Li,Rui Wang,Ke Huang,Qingyi Zeng,Jinhua Li,Baoxue Zhou
In this study, a novel three dimensional (3D) ZnO/Cu2O nanowire (NW) photocathode material with highly efficient photoelectrocatalytic performance was prepared on a copper substrate using simple, cost-effective wet chemical oxidation and hydrothermal growth methods. FE-SEM, TEM, XRD and XPS were used to investigate the 3D ZnO/Cu2O NWs, revealing the formation of the high density orientated Cu2O NW cores and ZnO NW shells. Compared with the pure Cu2O NWs, the 3D ZnO/Cu2O NWs showed a larger photocurrent (−4.55 mA cm−2) and better stability under AM 1.5G illumination (100 mW cm−2). In light of the high effective surface area and the ability to facilitate good electron transportation, this unique nanostructure will be favorable for efficient photoelectrocatalytic (PEC) water splitting and organic pollutant degradation.
研究领域:
材料科学
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环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jie Cui,Lin Ye,Xiaoxi Chen,Jianing Li,Bian Yang,Man Yang,Qing Yang,Daqin Yun,Shaodong Sun
Exploring novel materials with both high adsorption capacity and photocatalytic properties is urgent in environmental remediation. In this work, a Z-scheme ZnO/Cu 2 O heterostructure with a large surface area of 45.42 m 2 /g was constructed by using the liquid phase reduction method. Compared to pure ZnO and pure Cu 2 O, the as-synthesized ZnO/Cu 2 O nanocomposites exhibited excellent capacity of adsorption and photodegradation for tetracycline (TC), which was degraded 95.3% of TC within 120 min under simultaneous adsorption and photocatalytic processes. Theory and experimental analysis manifested that the excellent adsorption-photocatalytic activity can be attributed to the large BET specific surface area, the efficient charge carrier separation and the high redox capability. The results of this study identified the potential advantages of ZnO/Cu 2 O composites for removing antibiotics to purify water resources and protect the environment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2021
·Vol. 11
·期 5
·535
·
IF 4.146
Shuaikang Zhu,Xiaona Ren,Xiaoxue Li,Xiaopo Niu,Miao Wang,Shuang Xu,Zheyuan Wang,Yunxi Han,Qingfa Wang
The copper-based catalyst is considered to be the only catalyst for electrochemical carbon dioxide reduction to produce a variety of hydrocarbons, but its low selectivity and low current density to C2products restrict its development. Herein, a core-shell xZnO@yCu2O catalysts for electrochemical CO2reduction was fabricated via a two-step route. The high selectivity of C2products of 49.8% on ZnO@4Cu2O (ethylene 33.5%, ethanol 16.3%) with an excellent total current density of 140.1 mA cm−2was achieved over this core-shell structure catalyst in a flow cell, in which the C2selectivity was twice that of Cu2O. The high electrochemical activity for ECR to C2products was attributed to the synergetic effects of the ZnO core and Cu2O shell, which not only enhanced the selectivity of the coordinating electron, improved the HER overpotential, and fastened the electron transfer, but also promoted the multielectron involved kinetics for ethylene and ethanol production. This work provides some new insights into the design of highly efficient Cu-based electrocatalysts for enhancing the selectivity of electrochemical CO2reduction to produce high-value C2products.Keywords:CO2electrochemical reduction;core-shell structure;ZnO@Cu2O;synergy effect;C2products selectivity
研究领域:
电化学
·
材料科学
·
催化
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Qi Zhou,Na Yang,Luhong Zhang,Longfei Zhang,Jingshuai Li,Xiaodong Yang,Feifei Peng,Yongli Sun
Application of the super-wettability material is one of the most ideal approaches to achieve oil/water separation. The construction of the super-wettability material surface is the key to significantly boost the separation efficiency. In this work, the ZnO@Cu 2 O honeycomb-likes hierarchical micro/nano-structure copper mesh (ZnO@Cu 2 O/CM) is facilely fabricated through the combination of oxidation and hydrothermal deposition. Accordingly, superhydrophilicity/underwater superoleophobicity can be achieved, which endows over 99% separation efficiency as well as considerable permeation flux (>38120 L∙m −2 ∙h −1 ) for ZnO@Cu 2 O/CM toward various oil/water mixtures. Besides, the combination of ZnO and Cu 2 O produces a p-n heterostructure to further reduce the recombination rate of electron and hole, resulting in the improved the photocatalytic activity. The removal efficiency for methylene blue (MB) of ZnO@Cu 2 O/CM could be improved to 98.1%, nearly 1.6 times than that of Cu 2 O/CM. Various stability tests demonstrate that the material exhibits good mechanical stability , anti-corrosive property and thermal durability under harsh environments. Furthermore, cyclic experiments reveal that ZnO@Cu 2 O/CM exhibits fascinating reusability . In conclusion, the as-synthesized dual-functional mesh performs favorable photocatalytic activity and super-wettability, which can realize wastewater remediation at low cost and energy consumption.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）