Battery Energy
·
2024
·
IF 9
Xiangchao Xu,Fen Qiao,Yanzhen Liu,Wenjie Liu
Cu(OH) 2 has the advantages of ease of structural regulation, good conductivity, and relatively low cost, making it a suitable candidate material for use as an electrocatalyst. However, its catalytic efficiency and stability still need to be improved further. Therefore, Cu(OH) 2 /Cu 2 S was successfully prepared on copper foam (CF) using the in situ growth and hydrothermal method. The structural characterization showed that sulfidation treatment induced transformation of Cu(OH) 2 /CF from smooth nanorods into a coral-like structure, which exposed more active sites of Cu(OH) 2 /Cu 2 S and enhanced the performance of electrocatalytic hydrogen evolution reaction (HER). Compared with Cu(OH) 2 , Cu(OH) 2 /Cu 2 S showed better alkaline HER performance, especially when the vulcanization concentration was 0.1 M, the overpotential of Cu(OH) 2 /Cu 2 S was 174 mV, and the reaction kinetics was 64 mv dec −1 at a current density of 10 mA cm −2 . In this work, the morphology and electronic structure of copper-based metal sulfide electrocatalysts were adjusted by sulfide treatment, which provided a new reference for improving HER performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Carbon Letters
·
2023
·Vol. 33
·期 5
·1395-1406
·
IF 4.5
Chen Zhangjing,Li Liangliang,Cheng Gang
Photocatalytic CO 2 reduction is a promising approach for reducing CO 2 emissions and achieving the goal of carbon neutrality. In this work, selectively coupling Cu(OH) 2 and CuO with amine-modified brookite TiO 2 (NH 2 –B–TiO 2 ) has been achieved by a simple precipitation method. The results show that CuO is better than Cu(OH) 2 as a co-catalyst to enhance the CO 2 photoreduction capability of NH 2 –B–TiO 2 . The highest rates of CO 2 conversion to CH 4 and CO of NH 2 –B–TiO 2 –CuO composite reach 6.05 and 3.25 μmol h −1 g −1 , respectively, which is higher than 8 times the yield of CH 4 of NH 2 –B–TiO 2 . It is proposed that the NH 2 –B–TiO 2 –CuO composite offers an effective charge transfer through the formation of a p–n junction between NH 2 –B–TiO 2 and CuO interfaces, while in the NH 2 –B–TiO 2 –Cu(OH) 2 composite, the Cu(OH) 2 dominantly serves as an electron sink to capture photo-induced electrons, promoting photo-induced carrier separation. This work provides an ingenious synthetic method for selectively anchoring Cu(OH) 2 and CuO on semiconductors with different charge transfer routes for an efficient CO 2 photoreduction. Graphical abstract
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Yibo Ao,Jinqing Ao,Ling Zhao,Liwei Hu,Fengsheng Qu,Biao Guo,Xue Liu
Cu(OH)2 nanomaterials are widely investigated for non-enzymatic glucose sensors due to their low-cost and excellent performance. Cu(OH)2 nanomaterials usually grow on substrates to form sensor electrodes. Reported works mainly focus on structure adjusting of the Cu(OH)2 nanostructures, while the optimization of substrates is still lacking. In the present work, directional porous Cu (DPC) was applied as the substrate for the growth of Cu(OH)2 nanograss (NG), and hierarchical structures of Cu(OH)2@DPC were prepared by alkaline oxidation. The morphology and microstructure evolution of the prepared hierarchical structures was investigated, and the non-enzymatic glucose sensing performance was evaluated. Cu(OH)2@DPC exhibits enhanced comprehensive non-enzymatic glucose sensing performance compared to the reported ones, which may benefit from both the effective adsorption of the Cu(OH)2 NG with a relatively high surface area and the high solute exchange of the DPC by a channel effect. This work provides new insights into the further improvement of the non-enzymatic glucose sensing performance of Cu(OH)2 nanostructures by optimizing the substrate structure.
研究领域:
材料科学
·
传感器技术
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Zhenhua Ge,Bin Fu,Xing Li,Jinping Zhao,Bo Ma,Zhiqiang Luo,Yantao Chen
Electrochemical water splitting is a very prospective technique to obtain the green hydrogen fuel . The oxygen evolution reaction becomes a limitation owing to the multiple electron transfer process. Thereby, a lot of attention is paid on the development of noble-metal free electrocatalysts for boosting the water oxidation process . The heterostructure of Mn 3 O 4 nanoparticles on Cu(OH) 2 nanowire arrays is fabricated, which exhibits an electrocatalytic activity close to RuO 2 . Compared with the single (hydro)oxides, the largely improved performance of the heterostructure towards water oxidation can be attributed to the enhanced charge transfer by the electronic interaction across the interface and the increased active sites for the rational combination of different active species . This work can be valuable for highlighting the role of heterostructure in the design and development of novel transition metal-based electrocatalysts for water oxidation.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Lu Qin,Peng She,Panlong Si,Suqin Liu,Gaopeng Dai,Cong Pan
Photocatalytic production of H 2 O 2 is indeed a safe, sustainable and cost-effective technology, offering an environmentally friendly solution to the energy crisis through solar photocatalysis. However, it still faces challenges such as reliance on organic electron donors and pure O 2 , as well as inefficiencies in hole utilization. To overcome these limitations, a dual-channel photocatalytic system has been developed. In this study, we showcase the efficiency of the CuO/Cu(OH) 2 @g-C 3 N 4 composite, derived from CuBTC/g-C 3 N 4 via NaOH treatment, as a high-performance dual-channel photocatalyst for H 2 O 2 production. Under visible light (λ ≥ 420 nm), this composite achieves a H 2 O 2 yield of 1354 μmol/L in 120 min without any sacrificial agent, outperforming g-C 3 N 4 by 8.4 times, CuO by 13.6 times and CuO@g-C 3 N 4 by 1.9 times. Quenching experiments and electron paramagnetic resonance spectra confirmed that HO • and O 2 •− are intermediate products in the photocatalytic process, following a two-step single-electron reaction pathway. The superior activity of CuO/Cu(OH) 2 @g-C 3 N 4 in H 2 O 2 generation can be attributed to the synergistic effects of OH bonds on the CuO@g-C 3 N 4 Z-type heterojunction and Cu(OH) 2 . This research presents a straightforward and promising approach for developing highly efficient photocatalysts for energy conversion.
研究领域:
材料科学
·
环境科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS
·
2019
·Vol. 19
·期 22
·5055
·
IF 3.031
Min Jiang,Peng Sun,Jie Zhao,Lihua Huo,Guofeng Cui
Flexible physiological medical devices have gradually spread to the lives of people, especially the elderly. Here, a flexible integrated sensor based on Au nanoparticle modified copper hydroxide nanograss arrays on flexible carbon fiber cloth ([email protected](OH)2/CFC) is fabricated by a facile electrochemical method. The sensor possesses ultrahigh sensitivity of 7.35 mA mM−1cm−2in the linear concentration range of 0.10 to 3.30 mM and an ultralow detection limit down to 26.97 nM. The fantastic sensing properties can be ascribed to the collective effect of the superior electrochemical catalytic activity of nanograss arrays with dramatically enhanced electrochemically active surface area as well as mass transfer ability when modified with Au and intimate contact between the active material ([email protected](OH)2) and current collector (CFC), concurrently supplying good conductivity for electron/ion transport during glucose biosensing. Furthermore, the device also exhibits excellent anti-interference and stability for glucose detection. Owing to the distinguished performances, the novel sensor shows extreme reliability for practical glucose testing in human serum and juice samples. Significantly, these unique properties and the soft structure of silk fabric can provide a promising structure design for a flexible micro-device and a great potential material candidate of electrochemical glucose sensor.Keywords:Cu(OH)2nanograss;Au nanoparticles;glucose detection;flexible electrochemical biosensor
研究领域:
材料科学
·
电化学
·
生物医学工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Yingdong Chen,Rongze Sun,Wentao Yan,Mengyao Wu,Yong Zhou,CongJie Gao
In many important industries, such as the textile printing industry, a large amount of dye/salt wastewater is often discharged, which can destroy the ecological environment of the water body. Membrane technology has a great potential in the treatment of environmental problems caused by dye/salt wastewater. Polyvinyl alcohol (PVA) nanofiltration (NF) membrane has a bright future in dye/salt wastewater treatment , however, works on this are rare. Herein, antibacterial PVA NF membrane incorporated with Cu(OH) 2 nanowires for the dye/salt wastewater treatment is reported. The membrane was prepared via coating the solutions containing PVA, glutaraldehyde and Cu(OH) 2 nanowires on the polyethersulfone ultrafiltration membrane. Cu(OH) 2 nanowires has a diameter of 60 nm and was successfully introduced into the membrane. The introduction of nanowires improved the membrane hydrophilicity and roughness, which is conducive to the improvement of membrane flux. Membrane separation performance for one component solution and dye/salt solution were investigated. The introduction of Cu(OH) 2 increases the flux of the membrane obviously (the highest increase is 178.78% (from 21.49 to 38.42 L·m −2 ·h −1 ·bar −1 , for NaCl solution as the feed). Besides, the membrane doped with nanowires also possessed a high dye/salt selectivity . For one component solution, the dye removal rate was over 97.00% while the salt rejection was low (the lowest was 13.18% (NaCl)). For the dye/salt solution, the dye (Congo Red) rejection kept at a high level (98.91%) and the salt (NaCl) rejection was still low (13.71%), while the flux was also high (37.56 L·m −2 ·h −1 ·bar −1 ). The performance is superior to that of many membranes reported in previous works. Moreover, the Cu(OH) 2 nanowires endowed the membrane with an improved and high antibacterial property. The sterilization rate of Escherichia coli and Staphylococcus aureus reached more than 99.99%.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 21
·7256-7264
·
IF 4.39
Lei Ye,Yeqing Zhang,Limin Wang,LinXiu Zhao,Yaqiong Gong
Due to the slow kinetics of oxygen evolution at the anode, the efficiency of electrocatalytic water decomposition is critically reduced, and its large-scale application is severely restricted. Therefore, it is urgent to develop electrocatalysts with excellent performance and stability to accelerate the oxygen evolution reaction (OER) reaction kinetics. Herein, a self-supporting binder-free electrocatalyst was successfully prepared using in situ grown Cu(OH)2 nanowires on CF as the carrier to grow ZIF-67 via a room temperature immersion method. The combination of Cu(OH)2 nanowires and the unique structure of ZIF-67 forms a three-dimensional nanostructured catalyst, in which the unique structure and the existence of synergy may contribute to a larger electrochemical active surface area, expose more electrochemically active sites, adjust the electronic structure, and accelerate the rate of electron transfer, thus greatly improving the electrocatalytic activity and durability for OER. The as-prepared Cu(OH)2@ZIF-67/CF exhibited excellent OER performance under alkaline conditions and required overpotentials of 205 mV and 276 mV to drive current densities of 10 mA cm−2 and 100 mA cm−2, respectively, with a small Tafel slope of 70.5 mV dec−1 for OER. The stability test of Cu(OH)2@ZIF-67/CF at the current density of 10 mA cm−2 displayed excellent stability for 22 h. This study provides a feasible strategy for the rapid preparation of low-cost and efficient electrocatalysts in alkaline media.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Fuling Zhou,Chao You,Qiang Wang,Yilin Chen,Zhipeng Wang,Zuoping Zeng,Xuping Sun,Ke Huang,Xiaoli Xiong
A novel highly sensitive non-enzymatic glucose sensor is constructed based on an ultrafast synthesized amorphous NiCu-OH film coated Cu(OH) 2 nanorod array grown on copper foam (NiCu-OH@Cu(OH) 2 NRA/CF). The synthesized (NiCu-OH@Cu(OH) 2 NRA/CF) has abundant catalytic activity and good catalytic performance for the electrochemical detection of glucose in alkaline conditions. Sensitive and selective voltammetric detection of glucose is demonstrated. The linear range extends from 100 nM to 1.5 mM, the detection limit is 32 nM, and the sensitivity is 6560.3 μA mM -1 cm -2 . The method is applied to the determination of nitrite in human blood serum.
研究领域:
分析化学
·
生物医学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 32
·325502
·
IF 3.551
Nianfeng Shi,Shupei Sun,Bo Zhang,Qian Du,Yanxin Liao,Xiaoming Liao,Guangfu Yin,Zhongbing Huang,Ximing Pu,Xianchun Chen
Co(OH)2 nanosheets/Cu(OH)2 nanorods composite electrodes for non-enzymatic glucose detection were fabricated by electrodepositing Co(OH)2 nanosheets on Cu(OH)2 nanorods substrate grown directly on the copper sheet via a simple one-step reaction. The Co(OH)2 nanosheets/Cu(OH)2 nanorods composite electrode was characterized by scanning electron microscopy, energy dispersive x-ray spectroscopy, x-ray diffraction and x-ray photoelectron spectroscopy. The glucose sensing performance of the composite electrode was investigated by cyclic voltammetry and chronoamperometry. The composite electrode shows high sensitivity of 2366 µA mM−1 cm−2 up to 2 mM with a lower detection limit of 0.17 mM (S/N = 3). The composite electrode is highly selective to glucose in the presence of various substances that always co-exist with glucose in real blood samples. The response of the composite towards human blood serum was in good agreement with that of commercially available glucose sensors, suggesting that a promising electrode material for highly sensitive and selective non enzymatic detection of glucose can be envisioned.
研究领域:
电化学
·
纳米材料
·
生物传感器
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Jianguo Duan,Xinshuai Yan,Kun Lei,Jianguo Cheng,Yaxiong Wang,Qingzong Su,Shimin Xu,Jianming Li,Qing Ma
The phase change materials (PCMs) are encapsulated into porous materials for collecting and storing heat energy has been widely used to overcome the intermittency of solar energy utilization. However, due to the inherent big pore structure and surface characteristics, metal porous materials are not ideal for PCM leakage-proof and slow photo-thermal response. To address these issues, A micro/nanostructured graphene-polyvinyl alcohol nanosheets/Cu(OH) 2 nanowire on a three-dimensional Cu foam (CF) to fill with PCM was designed and prepared. In the composite PCM, the polyvinyl alcohol/reduced graphene oxide (PRG) films coated on Cu(OH) 2 @Cu foam (CCF) provided a large number of active sites for the adsorption of modified paraffin wax (PWS). The prepared composite PCM has a stable structure and high thermal conductivity properties, meanwhile, the strong PRG films play a key role in enhancing leakage-proof and stability. The results show that the enthalpy value of PRG-CCF/PWS are 160.25 J·g −1 after 200 thermal cycles; which still maintains excellent cycle thermal reliability. In addition, under the simulated solar irradiation intensity is 120 mW·cm −2 , the heat storage rate and photo-thermal conversion efficiency of PRG-CCF/PWS are 1.37 J·s −1 and 90.25 %, respectively. It shows excellent photo-thermal response and uniform temperature distribution. This work provides an efficient, sustainable and affordable strategy for manufacturing high-performance composite PCM that can efficiently achieve solar energy utilization and energy management.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 38
·385501
·
IF 3.953
Yanxin Liao,Qian Du,Shupei Sun,Nianfeng Shi,Guangfu Yin,Zhongbing Huang,Xiaoming Liao
Self-supported Cu2S/Cu(OH)2 composite nanorods for highly sensitive non-enzymatic glucose sensing were in situ grown on Cu foam by simple hydrothermal treatment of aligned Cu(OH)2 nanorods. The physicochemical and electrochemical properties of the as-fabricated Cu2S/Cu(OH)2 composite nanorods were characterized by scanning electron microscopy, transmission electron microscopy, x-ray diffraction, Raman spectroscope, x-ray photoelectron spectroscope, cyclic voltammetry, electrochemical impedance spectroscopy, amperometric i–t measurements. The mechanism of the composite nanorods produced on conductive substrates was also explored. The electrode exhibits a sensitivity of 9626.88 μA mM−1 cm−2 towards glucose with good anti-interference ability, indicating it a promising electrode material for the enhanced non-enzymatic glucose detection.
研究领域:
材料科学
·
分析化学
·
生物医学工程
✓ 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）