RSC Advances
·
2016
·Vol. 6
·期 30
·25185-25190
·
IF 3.289
Zhi-Qiao Wang,Zhong-Ning Xu,Ming-Jian Zhang,Qing-Song Chen,Yumin Chen,Guo-Cong Guo
High-performance catalysts are the key factor for CO2 activation and conversion. In this paper, we systematically investigate the whole composition evolution process of Cu/SiO2 catalysts for CO2 hydrogenation. The precursor gradually evolved from amorphous Cu species to copper phyllosilicate, then to CuO with the increase of calcination temperature from ambient temperature to 700 °C. With the evolution of the precursor, the corresponding species after reduction were gradually evolved from Cu0 to Cu+, then to Cu0 again. The ratios of Cu+/(Cu+ + Cu0) are positively correlated with the catalytic activities. The Cu+ species derived from copper phyllosilicate were demonstrated to be crucial in achieving high-performance Cu/SiO2 catalysts for CO2 hydrogenation. The composition evolution has been demonstrated to be an efficient strategy to synthesize high-performance catalysts. This strategy of composition evolution can be applied to the synthesis of other high-performance Cu-based heterogeneous catalysts.
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高影响因子
BIORESOURCE TECHNOLOGY
·
2025
·
IF 9
Yangyang Liu,Wenxin Zhang,Dan Wu,Jiong Guo,Yifei Wang,Zihui Meng
Excessive Cu(II) is a constant risk to aquatic ecosystems and human health. To date, field-deployable assays that are visual, quantitative, and recyclable are rare. Objective of the presented study is to create a bio-inspired, recyclable sensor that transduce selective Cu(II) binding to an immediate optical readout for on-site monitoring. Therefore, We engineered a photonic-crystal hydrogel from carboxymethyl Bletilla striata (“Bai Ji”) polysaccharide. We embedded a colloidal photonic lattice within the polysaccharide network. This design converts Cu(II) binding, which involves coordination and ion exchange at oxygenated groups, into a concentration-dependent blue shift in structural color. The material facilitates naked-eye screening and spectroscopic quantification of Cu(II) with an limit of detection (LOD) of 0.078 µmol∙L −1 and an adsorption capacity of 82 ± 0.1 mg∙g −1 . Mechanistic analysis (kinetics, isotherms, thermodynamics, X-ray Photoelectron Spectroscopy(XPS)) supports cooperative coordination, ion-exchange, and van der Waals interactions between Cu(II) and the polysaccharide functional groups. The hydrogel is regenerable by mild elution and yields accurate recoveries in lake and tap water. This work demonstrates a sustainable and efficient platform for rapid, on-site Cu(II) monitoring in environmental waters.
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高影响因子
PROGRESS IN ORGANIC COATINGS
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2025
·
IF 7.3
Yaolong Yang,Xuan Jiao,Binrui Wu,Jiahao Li,Yuanyuan Yang,Wanbo Chen,Yuying Wang,Xi Chen,Shenshen Zhang,Song Yang,Feiyan Fu
Superhydrophobic coatings have emerged as a promising solution for enhancing the durability and longevity of metallic materials in various industrial applications, especially in the field of metal anti-corrosion. However, previous coatings were complicated to prepare and exhibited limited corrosion resistance performance. In this study, we developed a corrosion-resistant and superhydrophobic coating with comprehensive protective capabilities using an environmentally benign and highly efficient two-step electrodeposition approach. This coating can be deposited on contoured surfaces for the corrosion protection of metallic substances. In the first electrodeposition step, sodium citrate was employed to promote the combination of copper and nickel, forming a rough copper‑nickel coating. In the second step, a cerium stearate coating was fabricated and modified. The morphology, structure, and corrosion resistance of the coating were comprehensively characterized. The results showed that the static contact angle of water on the coating could reach up to 155° at most, and the corrosion current density could be as low as 2.51 × 10 −10 A/cm 2 , enabling 1500 h immersion resistance in 10 wt% NaCl solution. Moreover, the coating's outstanding comprehensive performance enables it to withstand various harsh natural environments. This study provides a new theoretical support for the corrosion protection of metals under adverse natural conditions.
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高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Wenbin Huang,Ningran Hou,Han Yang,Zhen Xu,Tianyu Bai,Fan Shao,Yasong Zhou,Qiang Wei
Series g-C 3 N 4 /Cu/B-TiO 2 (x) composites with different mass ratio of g-C 3 N 4 to Cu/B-TiO 2 were prepared and tested for photocatalytic reduction of CO 2 . The structure–function relationship of the photocatalysts was investigated through various characterization methods and photocatalytic experiments. The results show that g-C 3 N 4 can be uniformly distributed on the surface of Cu/B-TiO 2 and formed a stable heterojunction structure, which effectively reduced the band gap width of the catalyst, thus significantly improving the visible light absorption capacity of the catalyst. The modulation of the composite material properties can be realized by regulating the composite ratio of g-C3N4 and Cu/B-TiO 2 . The rate and selectivity of photocatalytic reduction of CO 2 to produce CO reached the maximum when the mass ratio of g-C 3 N 4 to Cu/B-TiO 2 was 3:7, and the rate of CO production was as high as 32.65 μmol∙g −1 ∙h −1 , which was about 12.87 percentage points higher than that of Cu/B-TiO 2 .
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高影响因子
Talanta Open
·
2025
·
IF 3.7
Xin Li,Kaigang An,Shuang Zhang,Jing He,Huifeng Liu,Hongdeng Qiu,Yiqun Wan,Jia Chen
Rapid detection of antibiotic residues in food is essential for public health. This study aims to develop a highly sensitive colorimetric sensing platform based on a novel nanozyme. To this end, we used a green, tunable, and safe choline chloride/urea-based deep eutectic solvent (DES) to synthesize a metal organic framework, Cu-BTC (BTC: 1,3,5-benzenetricarboxylate), with many highly dispersed copper active sites. As a result, the prepared Cu-BTC showed strong peroxidase-like activity. In the presence of hydrogen peroxide (H 2 O 2 ), it efficiently catalyzed the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to the blue product TMBox. Importantly, we found that tetracycline (TC) specifically and significantly inhibits this color reaction. The inhibition occurred because TC can directly reduce the blue TMBox, suppressing color development. Based on this effect, we developed a new colorimetric method for sensitive TC analysis. The method had a wide linear range (0.025-25 μM) and a very low detection limit (0.0024 μM). Moreover, it was successfully applied to accurately detect TC in complex food matrices such as milk and honey. Thus, this work not only provides a green route to synthesize high-performance nanozymes, but also establishes a simple, fast, and sensitive colorimetric platform for on-site detection of antibiotic residues in food.
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高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Yu-Fang Wu,Ya-Hui Li,Zhi-Meng Sui,Yu-Kun Wei,Rui-Han Wei,Xiao Chen,Xiao-Hua Yang,Zhi-Wei Chen,Zhihong Jing,Cheng-Yang Yue
Zero-dimension (0D) zinc halides have attracted intensive attention in multiple optoelectronic fields due to their excellent stability. However, most Zn-based halides show relatively weak luminescence efficiency, which limits their further widespread applications. Herein, we successfully optimized the electronic structure of a new 0D Zn halide [MTPP]2ZnBr4 ([MTPP]Br = Methyltriphenylphosphonium bromide) by Cu+ doping strategy to realize highly efficient and adjustable dual-color emission. Compared with weak blue-green emission of undoped [MTPP]2ZnBr4, the incorporating of Cu+ ion results in a newly emerged intense orange emission at 630 nm with highest photoluminescence quantum yield (PLQY) of 39.17%. More significantly, the relative intensities of dual emission feature transformation depending on environment temperature due to thermally associated reversible energy transfer between each self-trapped excitonic (STE) state, which enables this doped phase to act as a promising luminescent ratiometric thermometer with relative thermal sensitivity of 0.94% K-1 in the range of 80-260 K. Furthermore, this phenomenon also enables the material to achieve tunable multicolor luminescence with advanced applications in anti-counterfeiting. This study not only realizes highly efficient dual-color emissions in Zn-based halide, but also achieves temperature-dependent thermochromism luminescence with wide applications in temperature monitoring and anti-counterfeiting.
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PubMed
高影响因子
GREEN CHEMISTRY
·
2025
·
IF 9.2
Wen-Jing Shi,Zhen-Hong He,Mei-Xia Yang,Yue Tian,Lu-Ting Pan,Xin-Yan Wei,Weitao Wang,Kuan Wang,Huan Wang,Zhao-Tie Liu
Utilizing renewable energy-derived H2 to convert CO2 into valuable chemicals represents a crucial strategy for achieving carbon emission reduction and enabling resource utilization. Conventional photocatalytic CO2 methanation, however, is hindered by low activity and inefficient energy utilization, limiting its practical application. In the present work, we developed a Cu and Nd co-doped Co3O4 catalyst that synergistically harnesses both light and thermal energy for photothermal catalytic CO2 methanation. The optimized catalyst with a molar ratio of 9/1/1 for Co/Cu/Nd (denoted as CCNO-9) achieves a remarkable CH4 formation activity of 27.3 mmol·gcat-1·h-1 at 200 °C, especially at ambient pressure. The incorporation of foreign Cu and Nd atoms in Co3O4 lattice induces the formation of abundant heterogeneous interfaces and oxygen vacancies, thereby exposing additional active sites for CO2 adsorption and activation. In-situ DRIFTS studies revealed that the Nd promotes the conversion of CO2 into *HCO3- and *COOH key intermediates. The photothermal synergy significantly enhances the reaction. Photoexcitation generates electrons and holes for CO2 reduction, while the thermal energy assists in overcoming the reaction energy barriers. DFT calculations confirmed that the CCNO-9 catalyst requires the lowest energy barrier for the rate-determining step from *COOH to *CH4. This study presents a very active and stable photothermal catalytic system for efficient CO2 conversion, advancing the development of low-carbon catalytic technologies.
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高影响因子
Materials
·
2021
·Vol. 14
·期 20
·5958
·
IF 3.623
Xusheng Ren,Zhiliang Ou,Bang Wu
The activated coke is a promising support for catalysts, and it is important to study the performance of the activated coke catalyst on the removal of NOx. In the current research, a series of the activated coke-supported Mn–Cu catalysts are prepared by the incipient wetness impregnation method. The effects of the molar ration of Mn/Cu, the content of Mn–Cu, the calcination temperature, and reaction space velocity on NO conversion are investigated, and it was found that the 8 wt.% Mn0.7Cu0.3/AC had the best catalytic activity when the calcination temperature was 200 °C. The existence of SO2caused the catalyst to deactivate, but the activity of the poisoning catalyst could be recovered by different regeneration methods. To uncover the underlying mechanism, BET, XPS, XRD, SEM and FTIR characterizations were performed. These results suggested that the specific surface area and total pore volume of the poisoning catalyst are recovered and the sulfite and sulfate on the surface of the poisoning catalysts are removed after water washing regeneration. More importantly, the water washing regeneration returns the value of Mn3+/Mn4+, Cu2+/Cu+, and Oα/Oβ, related to the activity, basically back to the level of the fresh catalyst. Thus, the effect of water washing regeneration is better than thermal regeneration. These results could provide some helpful information for the design and development of the SCR catalysts.Keywords:activated coke;low-temperature NH3-SCR;sulfur poisoning;regeneration
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高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 33
·17413-17420
·
IF 8.867
Fei He,Li Mi,Yanfei Shen,Xinghua Chen,Yiran Yang,Hao Mei,Songqin Liu,Toshiyuki Mori,Yuanjian Zhang
Owing to the well-defined molecular structure and tunable mono-, di- or multinuclearity, Cu–N complexes have recently drawn specific attention as emerging catalysts for sustainable electrocatalytic oxygen reduction reaction (ORR) and other reactions. However, compared to state-of-the-art Pt/C, most of these Cu-based molecular catalysts show low catalytic activity due to the intrinsically limited capability and challenges in electronic structure modulation and sequential electron transfer within a single small molecule. Herein, inspired by structure–property relationships of laccases (a type of macromolecular biological catalyst), we report a facile molecular assembly of Cu(3,3′-diaminobenzidine) polymeric complex on carbon black via Cu–N complexing and π–π interaction as a highly efficient bifunctional electrocatalyst for ORR and hydrazine oxidation reaction (HOR), two half reactions for hydrazine fuel cells. Similar to the function of the Cys–His group in natural laccases, the 3,3′-diaminobenzidine ligand in the proposed polymeric catalyst synergistically adjusted the electronic structure of the Cu–N complex center and mediated a multiple-electron transfer cooperatively with carbon black via a long-range π–π interaction, owing to its electron reservation and π-conjugated properties. This study may provide a new way to design highly efficient biomimetic noble-metal-free electrocatalysts with well-defined and tunable structures.
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高影响因子
Catalysts
·
2022
·Vol. 12
·期 2
·147
·
IF 4.501
Li Cheng,Yu-Ting Zhong,Qu-Quan Wang,Li Zhou
Herein, we report an approach to prepare Cu/Cu2−xS core/shell nanorods by in situ sulfidation of copper nanorods. Firstly, copper nanorods with tunable longitudinal surface plasmon resonances were synthesized by a seed-mediated method using Au nanoparticles as seeds. A convenient in situ sulfidation method was then applied to convert the outermost layer of Cu nanorods into Cu2−xS, to increase their stability and surface activity in photocatalytic applications. The thickness of Cu2−xS layer can be adjusted by controlling the amount of S source. The Cu/Cu2−xS core/shell nanorods exhibits two characteristic surface plasmon resonances located in visible and near-infrared regions, respectively. The photocatalytic performances of Cu nanorods and their derivatives were evaluated by measuring the degradation rate of methyl orange dyes. Compared with Cu nanorods, the Cu/Cu2−xS core/shell nanorods demonstrate more than a 13.6-fold enhancement in the degradation rate at 40 min. This work suggests a new direction for constructing derivative nanostructures of copper nanorods and exploring their applications.Keywords:Cu nanorods;sulfidation;degradation
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高影响因子
CRYSTENGCOMM
·
2016
·Vol. 18
·期 20
·3703-3710
·
IF 3.849
Qingshuang Liang,Keke Huang,Xiaoru Ren,Wei Zhang,Renguo Xie,Shouhua Feng
In this work, Cu–Sb–S nanocrystals (NCs) with various compositions and crystal structures are realized by only tuning the amount of 1-dodecanethiol (DDT). When the DDT amount is 3.6, 5.5, 20.5, and 25.6 mmol, pure tetragonal Cu3SbS4, cubic Cu12Sb4S13, orthorhombic CuSbS2, and orthorhombic Cu3SbS3 NCs are respectively obtained. Systematic investigations demonstrate that different amounts of DDT are responsible for formation of the different compositions and crystal structures of the initial Cu2−xS seeds, which results into the formation of various Cu–Sb–S NCs. This reaction path is further verified by control experiments from successful preparation of Cu–Sb–S NCs comparable to that of the as-prepared ones directly from the reaction of Sb2S3 NCs with Cu2−xS seeds. The current study not only provides a facile and economical way to synthesize high-quality Cu–Sb–S NCs, but also opens a new route for preparation other I–V–VI multicomponent chalcogenides NCs, such as Cu–Bi–S systems.
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高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 30
·11966-11973
·
IF 0
Yu Zhang,Pengli Zhu,Liang Chen,Gang Li,Fengrui Zhou,Daoqiang (Daniel) Lu,Rong Sun,Feng Zhou,Ching-ping Wong
Novel hierarchical architectures of porous copper (Cu) microspheres assembled with nanoparticles have been successfully synthesized by ingeniously selecting the precursor and complexant through a facile wet chemical reduction method. The resultant porous Cu microspheres have a size distribution of 700 ± 50 nm and have excellent monodispersity. The synergistic effect between the precursor of slightly soluble copper hydroxide and the complexants of polyacrylic acid and ethanol amine exactly induces the generation of unique porous hierarchical architectures. The obtained porous Cu microspheres were applied to reduce and degrade different organic dyes with high concentrations (4-nitrophenol, methylene blue, and rhodamine B) in the presence of NaBH4. Compared with solid Cu particles that have the same size, these porous Cu microspheres exhibit more excellent catalytic activity due to their hierarchical structures. Moreover, the catalyst with universal applicability could be easily separated from the catalytic system and sustainedly possess high stability in recycled reactions.
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