Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 40
·23234-23242
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IF 12.732
Hongyu Chen,Zhaojie Wang,Shoufu Cao,Siyuan Liu,Xiaojing Lin,Yi Zhang,Yizhu Shang,Qiuying Zhu,Sainan Zhou,Shuxian Wei,Baojun Wei,Daofeng Sun,Xiaoqing Lu
The electrocatalytic CO2 reduction reaction (CO2RR) on copper-based catalysts is a promising method to produce valuable chemicals, but its selectivity is much lower than expected largely due to insufficient research on the structure of new materials. Herein, the antimony-doped Cu/Cu2O (Cu/Cu2O–Sb) catalyst is developed for a highly selective CO2RR to CO. The synthesized Cu/Cu2O–Sb exhibits intensive suppression of hydrogen evolution, a low overpotential and high faradaic efficiency (FE) towards CO. The CO selectivity is as high as ∼95% with a partial current density of ∼6.3 mA cm−2 at −0.9 V and maintains over 90% in a broad range of potentials. DFT calculations reveal that the doping of antimony achieves the distinct activation of CO2 and suppression of hydrogen evolution. Meanwhile, the pre-adsorbed *CO significantly promotes the desorption of the neighboring *CO, which is the key for high selectivity of CO2RR to CO. This work will provide a new consideration for the origin of high selectivity during the CO2RR and pave the way toward design of highly selective CO2 reduction catalysts.
研究领域:
电化学
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催化
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材料科学
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DOI
高影响因子
Current Nanoscience
·
2020
·Vol. 16
·期 4
·617-624
·
IF 1.836
Feng Yao,Wang Ran,Yin Juanjuan,Zhan Fangke,Chen Kaiyue,Jiao Tifeng,Zhou Jingxin,Zhang Lexin,Peng Qiuming
Background: 4-nitrophenol (4-NP) is one of the pollutants in sewage and harmful to human health and the environment. Cu is a non-noble metal with catalytic reduction effect on nitro compounds, and has the advantages of simple preparation, abundant reserves, and low price. Carbon nanotubes
(CNT) are widely used for substrate due to their excellent mechanical stability and high surface area. In this study, a simple method to prepare CNT-Cu2O by controlling different reaction time was reported. The prepared nanocomposites were used to catalyze 4-NP. Methods: CNTs and CuCl2
solution were put into a beaker, and then ascorbic acid and NaOH were added while continuously stirring. The reaction was carried out for a sufficiently long period of time at 60°C. The prepared samples were dried in a vacuum at 50°C for 48 h after washing with ethyl alcohol and deionized
water. Results: Nanostructures of these composites were characterized by scanning electron microscope and transmission electron microscopy techniques, and the results at a magnification of 200 nanometers showed that Cu2O was distributed on the surface of the CNTs. In addition, X-ray diffraction
was performed to further confirm the formation of Cu2O nanoparticles. The results of ultraviolet spectrophotometry showed that the catalytic effect of the compound on 4-NP was obvious. Conclusions: CNTs acted as a huge template for loading Cu2O nanoparticles, which could improve the stability
and cycle performance of Cu2O. The formation of nanoparticles was greatly affected by temperature and the appropriate concentration, showing great reducibility for the 4-NP reduction reaction.
研究领域:
环境科学
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材料科学
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催化
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纳米技术
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DOI
高影响因子
Small
·
2024
·
IF 13
Hongjie Yu,Lijun Zhang,Shaojian Jiang,Wenke Liu,Kai Deng,Ziqiang Wang,You Xu,Hongjing Wang,Liang Wang
Water splitting for hydrogen production is limited by high cell voltage and low energy conversion efficiencies due to the slow kinetic process of the oxygen evolution reaction (OER). Here, an electrolytic system is constructed in which the cathode and anode co-release H 2 at ultra-low input voltage using formaldehyde oxidation reaction (FOR) instead of OER. The prepared RuCe co-doped Cu 2 O nanotubes on copper foam (RuCe-Cu 2 O/CF) are used as electrode materials for the HER-FOR system. A current density of 0.8 A cm −2 is achieved at 0.55 V, and a stable hydrogen production process is realized at both the cathode and anode. Density functional theory (DFT) studies show that the synergistic effect of Ru and Ce drives: i) the d -band center of RuCe-Cu 2 O/CF away from the Fermi energy level; ii) the energy barrier for the C─H cracking of the H 2 C(OH)O * intermediate in FOR is lowered, which promotes the formation of H 2 from H * , and iii) ΔG H* tends to 0 (−0.1 eV), optimizing the reaction kinetics of HER. This work provides a new design for an efficient catalyst for dual hydrogen production systems from water splitting.
研究领域:
电化学
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材料科学
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催化
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能量转换与存储
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Yanrui Su,Xiaoyu Li,Zimu Gao,Jiajia He,Zizhen Liu,Linjun Duan,Tian Sun,Jiaoge Wu,Dan Liang,Chaojun Wei,Faying Fan,Wa Gao
The incorporation of dual redox sites within catalytic materials for H 2 O 2 activation represents a promising approach to enhance the efficiency of pollutant decomposition. In this study, Cu 2 O modified CuFe-LDH nanocomposite (Cu 2 O/CuFe-LDH) was successfully synthesized via in situ topotactic transformation of CuFe-LDH. The catalytic degradation performance of the Cu 2 O/CuFe-LDH nanocomposite was investigated utilizing tetracycline hydrochloride (TCH) as a typical antibiotic contaminant. It demonstrated exceptional catalytic activity, achieving a TCH elimination rate of 93.0 % in 60 min. A rate constant value of 0.0426 min −1 was calculated for the pseudo-first-order kinetic model, which was 1.6 times and 5.0 times higher than those of CuFe-LDH and Cu 2 O, respectively. Moreover, the Cu 2 O/CuFe-LDH nanocomposite demonstrated remarkable cycling stability (85 % degradation rate after 5 recycling cycles), a wide pH range (3−11), resistance to background ion interference, and lower toxicity of the products of degradation. Based on radical scavenger tests and electron paramagnetic resonance (EPR) spectroscopy, it was verified that TCH degradation was mediated by 1 O 2 , •OH and •O 2 - , with 1 O 2 playing an essential role. X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) investigations indicate that the remarkable catalytic efficacy of Cu 2 O/CuFe-LDH is predominantly due to the synergistic interactions between Cu 2 O and CuFe-LDH, with Cu 2 O promoting the accelerated dual Cu 2+ /Cu + and Fe 3+ /Fe 2+ cycling. Thus, the Cu 2 O/CuFe-LDH nanocomposite exhibits exceptional efficiency, environmental friendliness and recyclability, rendering it an ideal candidate for practical wastewater treatment applications.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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催化
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2025
·
IF 5.1
Zhenchao Li,Mingyang Wang,Ying Zhang,Zihan Bian,Xin Liu,Lu Bai,Aihua Liu
Nanozymes exhibit excellent catalytic activity and stability, making them as potential substitutes for natural enzymes with extensive applications in self-powered biosensors (SPB). In this study, Cu 2 O nanocubes (NCs) exhibiting good laccase-like activity were simply synthesized. Subsequently, a two-compartment biofuel cell (BFC) was assembled, consisting of an anodic chamber containing Cu 2 O NCs modified glassy carbon electrode (GCE) anode fueled by catechol, and a cathodic chamber featuring a bilirubin-oxidase/multi-walled carbon nanotubes (MWCNTs)/GCE biocathode. Notably, due to the ethylenediamine-like group in thiophanate-methyl (TM), which has a strong affinity for chelating the Cu(II)/Cu(I) active sites of the laccase-like of Cu 2 O NCs, the formation of Cu N bond leads to a significant inhibition of laccase-like activity and a great reduction in the open circuit potential (OCP) of the BFC. Based on this principle, an SPB was constructed to detect TM. The decline in OCP (ΔOCP) demonstrated a linear relationship with TM concentration ranging from 0.5 to 40 μM, achieving a lower detection limit of 0.11 μM (3σ/S). Moreover, the sensor exhibited no interference from other fungicides, indicating they did not affect TM detection. The as-developed sensor can be applicable to measure TM in soil and seawater samples satisfactorily. Thus, this study casts prospects for the application of nanozymes in self-powered sensors and lays the foundation for the development of fuel cells powered by phenolic pollutants in the future.
研究领域:
生物传感器
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纳米技术
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环境监测
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酶模拟
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分析化学
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产品关联
DOI
高影响因子
Advanced Science
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2024
·
IF 14.3
Zhuoran Yang,Zhuo Li,Chunyu Yang,Li Meng,Wei Guo,Liqiang Jing
Cuproptosis offers a promising and selective therapeutic strategy for cancer therapy. To fully realize its potential, the development of novel cuproptosis therapeutic agents and the achievement of efficient copper release are critical steps forward. Herein, closely-contacted Cu 2 O-CoWO 4 nanosheet heterojunctions (CCW-NH) are successfully synthesized using an in-situ process for cuproptosis therapy. The efficient release of copper ions from CCW-NH can be triggered by ultrasound irradiation, primarily due to the generation of superoxide radicals as the sonodynamic agents via the Z-scheme charge transfer mechanism. When subjected to the combined effects of ultrasound and laser irradiation, the effective release of copper ions is increased by 1.7 times compared to the untreated group, significantly enhancing the efficiency of cuproptosis. And the incorporation of CCW-NH and L-arginine into the temperature-sensitive injectable hydrogel (HP-CCW@LA) ultimately achieved a tumor inhibition rate of up to 95.1%. L-arginine, serving as a reducing agent, enabled the sustained release of highly active Cu + during treatment. Notably, after treating tumors with HP-CCW@LA, the tumor microenvironment is leveraged to promote copper ion conversion, which offers the potential for monitoring tumor therapy efficacy through magnetic resonance imaging. This work offers a novel integrated strategy for the development of new cuproptosis agents and therapeutic evaluation.
研究领域:
癌症治疗
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纳米技术
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材料科学
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医学成像
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产品关联
DOI
PubMed
高影响因子
Nano Today
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2024
·
IF 13.2
Yujiao Xie,Chao Chen,Chenguang Zhang,Lei Xu,Zihou Li,Wenzhi Ren,Xiawei Xu,Yong Ren,Jie Lin,Aiguo Wu
Conventional methodology for accurate identification of breast tumor subtypes is complex and time-consuming. Label-free SERS (surface-enhanced Raman scattering) enables rapid detection of biomolecules and provides intrinsic fingerprint information of analytes. Exploring reliable SERS bioprobes with high sensitivity and repeatability is essential for efficient typing of cancer cells. In this study, a novel core-shell noble metal-semiconductor Cu 2 O@Ag heterostructure with uniform morphology and outstanding SERS activity for label-free detection has been proposed. The Cu 2 O@Ag SERS substrates exhibit exceptional sensitivity to detect 4 nitrophenthiol (4NTP) at extreme low concentration (10 −15 M), and the SERS spectra demonstrate excellent selectivity and repeatability (RSD ≈ 8.84%). The enhancement mechanism is attributed to the synergistic enhancement of photoinduced charge transfer and boosted surface plasmon resonance effect, confirmed by reduced fluorescence lifetime of methylene blue on SERS substrates and enhanced electromagnetic field intensity via finite-difference time-domain computational simulation. The ultrahigh sensitivity and good signal stability endow Cu 2 O@Ag SERS bioprobe potential for accurate detection of four breast cancer cells subtypes. The rich fingerprint information from SERS spectra is processed using linear differentiation analysis, revealing a high accuracy of 93.3% for subtypes classification. These results demonstrate an excellent SERS bioprobe with high sensitivity and repeatability for precision diagnosis has been developed.
研究领域:
材料科学
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生物医学工程
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癌症研究
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
OPTICS EXPRESS
·
2021
·Vol. 30
·期 1
·588-602
·
IF 3.894
Anxin Jiao,Qingqiang Cui,Shuang Li,Yue Tian,Hui Ma,Chang Wang,Mengya Zhang,Ming Chen,Guihua Li,Guihua Li,Xiangdong Liu,Xiangdong Liu
Recently, hybrid plasmonic metal/semiconductor-based surface-enhanced Raman scattering (SERS) has attracted ever-increasing attention due to its combined characteristics of electromagnetic (EM) enhancement and chemical (CM) enhancement, holding great potential for trace molecular detection. Herein, we demonstrate an interesting heterostructure by linking Cu2O nano-octahedrons with intertwined Ag nanovines (NVs). The obtained Ag NVs/Cu2O heterostructures exhibit excellent SERS activity, which is about 2.7 and 7.0 times higher than that of monodispersed Ag or Au nanoparticles (NPs) modified Cu2O. The intertwined Ag NVs among adjacent Cu2O octahedrons serve as efficient electron transport channels, which can obviously promote the separation of electrons and holes, reduce the recombination of photogenerated carriers, and then improve the CM enhancement effect. Meanwhile, the accumulated electrons on plasmonic NVs can effectively optimize the collective oscillation of electrons and further improve the EM enhancement. The optimal SERS substrate possesses fascinating multifunctional SERS properties, including ultra-low detection limit (CV, 10−14 M), excellent anti-interference capability and selectivity. Finally, the established nanosensor can be effectively applied for the quantitative detection of pesticide thiram molecules in soil and biological samples, with low detection limits of 0.48 ng g−1 and 10−7 M, respectively. The proposed work demonstrates a high-performance SERS heterostructure with both improved CM enhancement and enhanced EM effect by linking adjacent Cu2O nano-octahedrons with Ag NVs, which is particularly suitable for ultrasensitive residual pesticide detection in real-world environment.
研究领域:
材料科学
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纳米技术
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分析化学
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环境科学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2025
·
IF 17.7
Hong-Rui Zhu,Xi-Lun Wang,Juan-Juan Zhao,Meng-Han Yin,Hui-Min Xu,Gao-Ren Li
Plastics are ubiquitous in human life and pose certain hazards to the environment and human body. The increasing amount of CO 2 in the atmosphere will lead to the greenhouse effect. Therefore, it is urgent to treat microplastic waste and CO 2 by using environmentally friendly and efficient technologies. In this work, we developed an efficient photoelectrocatalytic system composed of Ni single atoms (Ni SAs) supported by P, N-doped amorphous NiFe 2 O 4 (Ni SAs/A-P-N-NFO) as anode and Ag nanoparticles (Ag NPs) supported by CuO/Cu 2 O nanocubes (Ag NPs@CuO/Cu 2 O NCs) as cathode for microplastic oxidation and CO 2 reduction. The Ni SAs/A-P-N-NFO was synthesized by calcination-H 2 reduction method, and it achieved a Faraday efficiency of 93% for the oxidation reaction of poly (ethylene terephthalate) (PET) solution under AM 1.5 G light. As a photocathode, the synthesized Ag NPs@CuO/Cu 2 O NCs was utilized to reduce CO 2 to ethylene and CO at 1.5 V vs . RHE with selectivity of 42% and 55%, respectively. This work shows that the photoelectrocatalysis, as an environmentally friendly technology, is a feasible strategy for reducing the environmental and biological hazards of light plastics, as well as for efficient CO 2 reduction.
研究领域:
环境科学
·
材料科学
·
电化学
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纳米技术
·
催化
✓ 已验证
产品关联
DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2016
·
IF 1.34
Ai-ling YANG,Shun-pin LI,Yu-jin WANG,Le-le WANG,Xi-chang BAO,Ren-qiang YANG
Cu 2 O@Cu 2 O core-shell nanoparticles (NPs) were prepared by using solution phase strategy. It was found that Cu 2 O@Cu 2 O NPs were easily converted to Cu 2 O@Cu NPs with the help of polyvinylpyrrolidine (PVP) and excessive ascorbic acid (AA) in air at room temperature, which was an interesting phenomenon. The features of the two kinds of NPs were characterized by XRD, TEM and extinction spectra. Cu 2 O@Cu NPs with different shell thicknesses showed wide tunable optical properties for the localized surface plasmon (LSP) in metallic Cu. But Cu 2 O@Cu 2 O NPs did not indicate this feature. FTIR results reveal that Cu + ions on the surface of Cu 2 O shell coordinate with N and O atoms in PVP and are further reduced to metallic Cu by excessive AA and then form a nucleation site on the surface of Cu 2 O nanocrystalline. PVP binds onto different sites to proceed with the reduction utill all the Cu sources in Cu 2 O shell are completely assumed.
研究领域:
纳米材料
·
无机化学
·
等离子体学
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胶体化学
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纳米技术
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yi Pei,Jie Li,Zhaoyang Wang,Wei Zhong,Chunxin Lu,Zhongquan Shen,Nianlong Qian,Xiaoming Liu
In this work, composite materials (Cu-Cu 2 O/MO 2 , M = Mo and W) and their thermally treated form were prepared and characterized by using a variety of spectroscopic techniques (XRD, SEM, HRTEM, XPS and UPS) and cyclic voltammetry. Their catalytic performance on aerobic oxidation of various alcohols under mild conditions was investigated with N-methylimidazole (NMI) and 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) as the co-catalysts. Of the materials, the thermally treated MoO 2 -based material exhibited the best performance and durability. Compared to Cu-Cu 2 O, the involvement of MO 2 significantly enhances the catalytic activity on the oxidation. Our results suggest that the presence of MO 2 not only raises the energy level of VBM of Cu 2 O which is beneficial to O 2 activation and generates internal electric field pointing to the catalytic center (Cu 2 O) which would accelerate the electron transfer from the substrate to the catalyst through forming heterojunction with both Cu and MO 2 , but also disperses the catalytic center. Further, the Lewis acidity of MO 2 with appropriate strength can bring the substrate closer to the catalytic center via adsorption. But appropriate acidity is essential as easy on–off adsorption is desired in the catalysis. Thermal treatment generates oxidation state VI species of stronger acidity which offsets the effect of the raised VBM energy level.
研究领域:
催化
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材料科学
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化学工程
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物理化学
✓ 已验证
DOI
高影响因子
Journal of Coatings Technology and Research
·
2018
·Vol. 16
·期 1
·25-30
·
IF 1.619
Li Pengchong,Cai Chao,Long Yuhua,Zhu Tang,Dong Haixia,Zhu Caizhen,Zhao Ning,Xu Jian
Microsized Cu 2 O particles are widely used in tin-free marine antifouling (AF) paints. Because of the enlarged specific surface area, utilization of Cu 2 O particles with smaller sizes is a potential way to improve the AF efficiency and lower the Cu 2 O content. In this paper, the clay, commonly applied as filler in the paint, was previously used to control the concentration of free Cu 2 + during the synthesis of Cu 2 O. With the help of clay, the size of obtained Cu 2 O particles decreased from 750 to 460 nm. It has been shown that the smaller-sized Cu 2 O can work against the marine biofouling with a lower content (15 wt%) compared to the commercial microsized Cu 2 O (40 wt%) in the 260 days of marine AF field tests.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）