INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Tingxiang Chen,Liugen Zhang,Jiang Li,Changyan Guo,Shanshan Qiao,Yansong Zhao,Jide Wang
This paper introduces a facile method to develop core-shell nanocomposite Cu/(Cu 2 O/CuO) through gradually oxidation on Cu nanocomposite precursors. As-prepared catalyst exhibited excellent catalytic activity in the reaction of water oxidation reaction (WOR). Comparing with the reported catalyst, Cu/(Cu 2 O/CuO) posed one of the highest O 2 evolution around 7700 μmol g -1 ·h -1 . By analyzing the composition of catalysts in each reaction stages, the evolution pathway of Cu towards Cu 2 O/CuO and the different roles of each component in catalytic water oxidation reactions were deeply studied. In presence of high conductive Cu element and excellent light absorption Cu 2 O, the photo generated electron and holes can be effectively separated and greatly improve the efficiency of the catalyst. The evolution process and synergistic effects of the three components play a crucial role in improving photocatalytic efficiency, which promoting the nanocomposite to be a highly efficient core-shell catalyst for WOR.
研究领域:
材料科学
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催化化学
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DOI
高影响因子
ACS Omega
·
2021
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IF 3.512
Jiawei Sun,Min Li,Xueyan Sun,Lu Wang,Peng Han,Guicun Qi,Dali Gao,Lijing Zhang,Shengyang Tao
The integral catalytic impeller can simultaneously improve reaction efficiency and avoid the problem of catalyst separation, which has great potential in applying heterogeneous catalysis. This paper introduced a strategy of combining electroless copper plating with 3D printing technology to construct a pluggable copper-based integral catalytic agitating impeller (Cu-ICAI) and applied it to the catalytic reduction of 4-nitrophenol (4-NP). The obtained Cu-ICAI exhibits very excellent catalytic activity. The 4-NP conversion rate reaches almost 100% within 90 s. Furthermore, the Cu-ICAI can be easily pulled out from the reactor to be repeatedly used more than 15 times with high performance. Energy-dispersive spectrometry, X-ray diffraction, and X-ray photoelectron spectroscopy characterizations show that the catalyst obtained by electroless copper plating is a ternary Cu-Cu2O-CuO composite catalyst, which is conducive to the electron transfer process. This low-cost, facile, and versatile strategy, combining electroless plating and 3D printing, may provide a new idea for the preparation of the integral impeller with other metal catalytic activities.
研究领域:
化学工程
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催化科学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2023
·Vol. 25
·期 11
·1-12
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IF 2.5
Li Fangyuan,Yao Niu,Yuan Huiyu,Cui Junyan,Jia Quanli
The redox properties of electrode materials play a vital role in electrochemical performance. Fabrication of electrode materials with multiple oxidation species is highly desired for ultrasensitive glucose sensing. Herein, multivalent Cu/Cu 2 O/CuO/C (Cu/C) nanocomposites were successfully prepared for non-enzymatic glucose sensing by in situ pyrolysis of Cu metal-organic framework (Cu 3 (BTC) 2 ·3H 2 O, Cu-BTC) at a critical temperature. Structure characterizations showed that the nanocomposites maintained the original morphology of Cu-BTC crystals and exhibited mesoporous structures. Meanwhile, multiple Cu species containing Cu, Cu 2 O and CuO were generated simultaneously, which were tightly pinned on the ligand-derived carbon layers. Thus, under the synergistic effect of multivalent Cu species, mesoporous structure and intense interface contact, the sensing platforms based on Cu/C nanocomposites exhibited good glucose detection performance with a wide linear range of 0.005-2.0 mM, ultrasensitivity of 147.65 μA mM -1 cm -2 , low detection limit of 6.31 μM (S/N = 3), and favorable anti-interference properties and stability. Especially, the Cu/C sensing platform showed excellent recoveries of glucose when used to monitor glucose in real sample of honey. The good electrochemical activities of Cu/C nanocomposites render them promising candidates for sensors and other applications. Graphical abstract
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JOURNAL OF MATERIALS SCIENCE
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2025
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IF 3.9
Zheng Meiru,Liu Ying,Qiao Peng,Wang Xueqin,Guo Xin,Zhang Mei,Zhang Jiaojing,Zhang Jianwei,Feng Fuping
Photocatalysis technologies for degrading organic pollutants have emerged as a promising strategy for environmental remediation. This study aimed to develop efficient photocatalysts by synthesizing TiO 2 -loaded composites derived from CuZnAl layered double hydroxides (LDHs) and assessed their performance in the decomposition of rhodamine B (RhB). CuZnAl-LDH nanosheets were synthesized via coprecipitation and then calcined at high temperatures to obtain CuZnAl layered double oxides (CZA-LDO). By varying the amount of ascorbic acid, the CuO in CZA-LDO was reduced to different extents, thereby varying the ratio of Cu, Cu 2 O and CuO. TiO 2 was then deposited on the surface. The morphology, crystal structure, bonding state, and photocatalytic performance of the composite materials were assessed. When exposed to UV light, the optimized TiO 2 /Cu–Cu 2 O–CuO–0.7 composite material achieved a degradation rate of 96.0% for RhB within 110 min, which was significantly better than TiO 2 /CZA-LDO (46.0%) and other Cu-modified samples (66.2%–77.9%). The enhanced photocatalytic properties of the prepared nanocomposite were ascribed to doping with Cu, Cu 2 O and CuO, which effectively enhanced the electron–hole pair separation efficiency. These findings demonstrate the potential of Cu-Cu 2 O-CuO-LDO-based photocatalysts as effective materials for degrading organic contaminants in environmental remediation. Graphical abstract
研究领域:
环境科学
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材料化学
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光催化
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纳米材料
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污染修复
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DOI
高影响因子
ACS Sensors
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2025
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IF 9.1
Yaming Hu,Wenshuo Xie,Zhizhi Wang,Jinlong Ma,Linlin Hou,Qi Wang,Feng Xiong,Guanglan Liao,Tielin Shi,Hu Long
The introduction of oxygen vacancies (OVs) into metal oxide micro/nanostructures significantly enhances both catalytic performance and electrical conductivity, thereby boosting their gas-sensing capabilities. However, conventional approaches for engineering oxygen vacancies typically require specialized equipment (e.g., autoclave reactors) and extreme operational conditions (e.g., high temperature and high vacuum), posing substantial challenges for practical applications. Herein, a novel single-step laser-induced technique is developed for fabricating CuOx-based room-temperature acetone sensors under ambient conditions. The technique enables mask-free fabrication of tunable sensing films spanning morphologies from porous networks to nanospheres by precisely modulating the film thickness. Furthermore, oxygen-vacancy self-doping is inherently coupled with the micro/nanostructure growth mechanism, bypassing conventional postsynthesis treatments while preserving process simplicity. The as-prepared CuOx gas sensors with distinct morphologies manifest exceptional room-temperature acetone sensing with a wide response range spanning 0.1–10 ppm. Comparative analysis of nanosphere-based gas sensors conclusively demonstrates that oxygen vacancies constitute a key structural determinant, enabling room-temperature sensing capability in CuOx-based sensors. Moreover, both gas sensors exhibit outstanding selectivity toward acetone against common interferents (NO2, H2, CO2, and CO) and a low detection limit, highlighting their potential for trace acetone gas detection applications.
研究领域:
材料科学
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气体传感技术
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纳米制造
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光学加工
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环境监测
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Haoheng Wu,Yanyan Yu,Ying He,Yun Liu
The development of high-performance, multifunctional catalysts capable of effectively addressing nitroarene hydrogenation remains a significant challenge. In this study, we present a novel approach to catalyst design through the controlled carbonization of a copper–furan dicarboxylate metal–organic framework (Cu-FDCA MOF), resulting in two distinct nanocomposites: oxygen-vacancy-rich Cu/Cu 2 O/CuO@C (synthesized in an argon atmosphere) and conventional CuO (prepared by air calcination). Advanced characterizations, including TEM, XPS, EPR, and BET, reveal that Cu/Cu 2 O/CuO@C possesses 2.3 times more oxygen vacancies and a surface area 97 times greater (106.21 m 2 /g vs. 1.09 m 2 /g) than CuO, which directly correlates with its superior catalytic performance. In the context of nitroarene hydrogenation, Cu/Cu 2 O/CuO@C demonstrates an exceptionally high rate constant (k app = 25.33 × 10 -2 s -1 ), outperforming CuO by a factor of 40. Furthermore, Cu/Cu 2 O/CuO@C maintains 90 % of its catalytic activity after five reaction cycles and can be fully regenerated upon treatment at 400 °C. Through a combination of experimental studies and density functional theory (DFT) calculations, we propose a novel water-derived hydrogen transfer mechanism that challenges conventional understanding of the role of NaBH 4 . Notably, Cu/Cu 2 O/CuO@C also exhibits impressive versatility, efficiently degrading organic dye (Congo red/methylene blue/methyl blue) within three minutes. This work establishes MOF-derived oxygen-deficient nanocomposites as promising platforms for both amine synthesis and environmental decontamination.
研究领域:
材料科学
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催化化学
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环境科学
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DOI
高影响因子
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