JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Tianwei Zhao,Gang Cheng,Wuxia Zhang,Jinyan Xiong
Hollow-structured TiO 2 is promising for photocatalytic CO 2 reduction due to its high surface area and light absorption. This study aims to enhance its photocatalytic activity through the engineering of Cu and CuAg alloy cocatalysts. Hollow TiO 2 was synthesized by a hard template method, followed by Cu loading and CuAg alloy formation via a chemical replacement reaction. The optimal 7 % Cu loading achieved the highest CH 4 yield of 2.47 μmol g −1 h −1 among the TiO 2 -Cu composites. Introducing Ag further enhanced the performance, with the Cu:Ag = 9:1 alloy boosting the CH 4 yield to 6.72 μmol g −1 h −1 , approximately 14 times that of pure TiO 2 . Characterization techniques such as XRD, SEM, and XPS were also employed to analyze the phase composition, microstructure, and photoelectrochemical properties of the synthesized materials. The experimental findings indicate that the introduction of the CuAg alloy significantly promotes charge separation and transfer efficiency, and increases the effective active sites on the TiO 2 surface, thereby greatly enhancing the efficiency of the photocatalytic reaction. These findings offer insights into the design of efficient photocatalytic materials for sustainable energy applications.
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Wenhan Dai,Yahan Fang,Junfeng Huang,Zhongwei Wang,Jian Li,Mudong Tu,Huijiao Wang,Jun Yang,Cailing Xu,Hua Li
To tackle the pressing issue of nitrate (NO3–) pollution in wastewater and simultaneously convert it into ammonia (NH3), Cu nanocluster-modified Rhodium (Rh) single atoms anchored on N-doped carbon were synthesized via pyrolysis of a zeolitic imidazolate framework-8 (ZIF-8) precursor and applied to the electrochemical reduction of nitrate at a low concentration. Structural characterizations (X-ray powder diffractometer (XRD), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), and X-ray photoelectron spectroscopy (XPS)) confirmed the coexistence of Rh single atoms and Cu nanoclusters as well as their strong electronic interactions. Mechanistic investigations revealed that Rh sites enhanced *H generation via water dissociation and promoted NO3– adsorption, thereby facilitating *H transfer and subsequent hydrogenation steps. As a result, the optimized Cu97.5Rh2.5/NC catalyst exhibited outstanding NO3–RR performance, with a Faradaic efficiency (FE) of 84.53%, an NH3 yield rate of 1252.22 μg·h–1 mgcat–1 at −1.0 V vs reversible hydrogen electrode (RHE), an NH3 selectivity of 89.13% at −1.0 V vs RHE, and a NO3– conversion rate of 93.34% at −1.1 V vs RHE. This work presents a rational design for atom-economical catalysts, enabling sustainable NH3 electrosynthesis from nitrate-laden wastewater and reducing effluent NO3––N to meet World Health Organization (WHO) drinking water standards.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Optical Materials
·
2025
·
IF 3.8
Tingting Ye,Yunluo Wang,Zesen Gao,Shihao Ge,Haoming Qin,Xuchang He,Jianghua Wu,Ruifeng Liu,Meiling Zhu,Tianrui Zhou,Zesheng Pan,Jingshan Hou,Minghui Wang,Yihui He,Lianjun Wang,Haijie Chen,Wan Jiang
All-inorganic Cd-based halides have attracted much interest as a unique class of metal halides because of their afterglow luminescent properties, although the photoluminescence quantum yield (PLQY) is relatively low (<10%). Here, we investigated the optoelectronic characteristics of all-inorganic Cd chloride, including CsCdCl3, Cs2CdCl4, and Cs3Cd2Cl7, and improved their PLQY by Cu(I) doping, achieving a maximal PLQY of 81.6 ± 1.5% for Cs3Cd1.96Cu0.04Cl6.96. Based on the improved optoelectronic properties, we further used them for X-ray detection and anticounterfeiting. Under continuous X-ray irradiation at a dose rate of 26.5 Gy/min for 1800s, the Cu(I) ion-doped Cd chloride exhibits bright luminescence with little intensity loss, indicating high X-ray resistance and stability. As for anticounterfeiting, diversified modes have been fabricated, showcasing the versatile applications of Cd chloride with tunable persistent luminescence in advanced security systems. Our work demonstrates that multimodal luminescence makes Cd-based chlorides suitable as a unique choice among metal halides, extending the applications of metal halides across a wide range of optoelectronic fields.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Li Gan,Xiaoxue Zhang,Lei Guo,Muhammad Ajmal,Ru Jia,Xiaolei Guo,Chengxiang Shi,Lun Pan,Faryal Idrees,Xiangwen Zhang,Zhen-Feng Huang,Guidong Yang,Ji-Jun Zou
The electrochemical reduction of nitrate (NO 3 − RR) represents a compelling approach for the treatment of wastewater, serving as both a sustainable substitute to the energy-intensive Haber-Bosch process and a viable alternative to direct electroreduction of N 2 . However, the process involves multiple electron and proton transfer steps and a complex reaction pathway, leading to low Faraday efficiency and selectivity. Herein, we demonstrated a directional surface reconstruction to generate CoP-Cu/Co(OH) 2 heterojunction for synergistic catalysis of NO 3 − RR. Impressively, a high ammonia generation rate of 9.91 mmol h −1 cm −2 and a Faraday efficiency of 99.2 % can be achieved at an industrial-relevant current density of 2 A cm −2 . Moreover, the catalyst exhibited exceptional durability, maintaining the activity for 110 h under industrial current density. Such outstanding NO 3 − RR performance can be ascribed to the synergistic catalytic effect among the active sites of Cu, CoP and Co(OH) 2 , as well as the excellent stability of self-supported catalyst. Specifically, Cu and CoP sites synergistically promote the conversion of NO 3 − to NO 2 − and NO 2 − to NH 3 . Meanwhile, the partial reconstructed Co(OH) 2 from CoP enhances water dissociation, thereby supplying active hydrogen (*H) essential for NO 3 − RR. When applied to a membrane electrode assembly (MEA) system, CoP-Cu/Co(OH) 2 can deliver satisfactory ammonia production rate with appreciable economic benefits at industrial-level current densities, highlighting its potential for industrial applications.
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Shan Tai,Jeremy Dhainaut,Sebastien Royer,Rui Zhong,Shuo Chen,Nisrine Hammi
A novel copper-modified graphitic carbon nitride catalyst (CuNC) with a hierarchical, urchin-like flower morphology was developed for the catalytic reduction of 4-nitrophenol (4-NP). Synthesized via a facile hydrothermal method, the CuNC catalyst with 32 wt% copper loading exhibited exceptional activity, achieving complete conversion of 4-NP to 4-aminophenol (4-AP) within 14 s at a concentration of 0.11 mM in both river water and tap water. This performance surpasses that of conventional catalysts, highlighting the significant impact of the unique urchin-like flower morphology on catalytic efficiency. The enhanced activity is attributed to the synergistic effects of high copper dispersion, nitrogen doping, and efficient mass transfer facilitated by the hierarchical structure. This study demonstrates the potential of CuNC as an eco-friendly and cost-effective catalyst for the reduction of nitroaromatic compounds in real water samples, paving the way for its integration into sustainable catalytic systems for environmental remediation.
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Rui Xu,Jingqi Bao,Ningru Xuan,Bingxin Zhou,Lingshan Liao,Qiusheng Zhou,Di Wu,Linfang Lu
The template sacrifice method is a pivotal strategy for synthesizing noble metal-based nanocrystals with enhanced catalytic properties. A critical limitation of this method lies in the challenges associated with regulating the morphology of the resultant nanocrystals. This study demonstrates that the morphology of PtCu nanocrystals can be effectively modulated by adjusting the pH in the Cu 2 O template sacrifice method. Various PtCu nanocrystals, including PtCu hollow nanoboxes and PtCu nanodendrites of differing sizes, have been successfully synthesized. Mechanistic investigations reveal that reduced pH corresponds to a lower electrode potential of Cu 2 O, which enhances its reducing capacity, thereby intensifying the galvanic replacement reaction with the Pt precursor. The driving force of Kirkendall effect during this process can be systematically manipulated via pH adjustments, leading to the generation of PtCu nanocrystals with diverse morphologies. The synthesized PtCu nanocrystals demonstrate significantly improved methanol oxidation reaction activity compared to commercial Pt/C. Specifically, the PtCu hollow nanoboxes exhibit a methanol oxidation reaction (MOR) activity of 1.93 A mg⁻¹, which is 5.4 times greater than that of the commercial Pt/C. Physical characterizations suggest that the superior catalytic performance of PtCu hollow nanoboxes catalyst is attributed to its increased surface electronic density of Pt resulting from the special hollow and porous morphology. The pH control strategy outlined in this research holds promise for the synthesis of other Cu-based nanoalloys with varying morphologies, and may be applicable to other catalytic systems.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Jin Li,Yang Wang,Tianxing Wu,Xiujing Xing,Limin Li,Wei Xiong,Hao Li
Electrocatalytic reduction of nitrate for the synthesis of high-value chemical hydroxylamine (NH 2 OH) represents a sustainable pathway that combines the dual functions of green synthesis and wastewater treatment. However, the selective control of the process is extremely challenging, mainly due to the susceptibility of nitrate to over-reduction during the reaction, leading to uncontrolled conversion of the target product NH 2 OH to the thermodynamically stable product ammonia (NH 3 ). In this paper, the Cu-PDA MOF precursor was synthesized using the emulsion method, and ZIF-8 was introduced to form the structure of Cu-PDA@ZIF-8. Subsequently, the nitrogen-carbon-doped Cu-ZnO/N-C catalysts were formed by calcination under N 2 atmosphere. The synthesized catalyst effective improved NH 2 OH selectivity during nitrate reduction. The NH 2 OH yield and FE efficiency of Cu-ZnO/N-C reached 564.97 μmol h −1 mg cat −1 and 46.64 %, respectively, under neutral electrolyte conditions. Cu, as the main component of the catalyst, plays a dominant role in hydroxylamine by electrocatalytic nitrate reduction to promote the reaction in the stage of NO 3 – →*NH 2 OH. Zn, on the other hand, plays a key role in the phase *NH 2 OH → NH 2 OH, selectively generating the product NH 2 OH and blocking the excessive reduction of NH 2 OH to NH 3 . Additionally, this study achieved tandem catalytic selective generation of NH 2 OH at copper and zinc heterogeneous interfaces and offers a potential approach and reference for applications involving the nitrate reduction reaction.
✓ 已验证
产品关联
DOI
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.
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Feng Tan,Zhiqiang Sun
Hydrogen production from methanol is a promising pathway for clean energy applications, particularly in hydrogen transportation, storage, and in situ supply. This study investigates the chemical looping oxidative steam reforming of methanol using lanthanum copper oxide as the catalytic oxygen carrier. The results indicate that the redox looping promotes the generation of hollow La 2 CuO 4 supported exsolved Cu. This material exhibits excellent redox properties and satisfactory catalytic activity. Specifically, the sol-gel synthesized lanthanum copper oxide achieves a hydrogen yield of 0.22 mmol min −1 at 240 °C under a steam/methanol mole ratio of 1.2 and a gas hourly space velocity of 4000 h −1 . The catalytic oxygen carrier possesses even promoted catalytic activity and outstanding long-term stability after 60th cycles, attributed to the in situ generation of highly dispersed Cu nanoparticles via redox looping on the lanthanum copper oxide substrate. This research demonstrates the potential of lanthanum copper oxide as a next-generation catalytic oxygen carrier, contributing to the advancement of sustainable hydrogen production technologies.
✓ 已验证
产品关联
DOI
高影响因子
Sustainability
·
2025
·Vol. 18
·期 1
·
IF 3.3
Runlai Luo,Nan Zhao,Zhengmiao Jia,Sihan Wu,Xing Chen,Zhongyuan Li,Feng Ju,Yongming Luo,Hui Li
The simultaneous stabilization of Cu, Ni, Pb, and As in sustainable environmental development remains a significant challenge in heavy metal remediation. In this paper, liquid phase equilibrium experiments have evaluated the immobilization efficiency of 20 potential stabilization materials. Soil stabilization experiments, material characterization, and long-term effectiveness assessments have been performed to investigate the efficient composite stabilization agent and its underlying mechanisms. Results demonstrate that seven materials, including calcium oxide (CaO) and hydroxyapatite (HAP), exhibit multi-metal immobilization capabilities. Among single-material stabilization in soil, HAP for Pb, zero-valent iron (ZVI) for As, and blast furnace slag (BFS) for Cu exhibit prominent stabilization efficiency, yet they cannot efficiently stabilize the four heavy metals simultaneously. Subsequently, the ZVI:BFS:CaO composite agent (6:3:1 mass ratio, 10% addition rate) has been proposed by formulation optimization, achieving remarkable stabilization rates: 99.92% for Cu, 96.16% for Ni, 92.06% for Pb, and 99.58% for As. XRD, XPS, and SEM-EDS analyses confirm that the stabilization occurs through synergistic mechanisms including precipitation, complexation, and lattice encapsulation. The composite stabilizing agent withstood 15 wet–dry and 150 freeze–thaw cycles, with four types of heavy metals stabilization rates > 60%, confirming its long-term effectiveness.
✓ 已验证
产品关联
DOI
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.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2025
·
IF 7
Zhen Li,Xianhui Wang,Yan Liang,Jituo Liu
To achieve the optimal trade-off among strength, toughness and electrical conductivity, the CNTs-Mo/Cu composites with different architectural structures were fabricated by the combination of wet mixing, ball milling, spark plasma sintering (SPS) and hot rolling. The microstructure, mechanical properties and electrical conductivity of the CNTs-Mo/Cu composites were investigated, and the strengthening and toughening mechanisms were also explored based on the experimental results along with finite element simulation and first-principles. It is found that CNTs-Mo exhibits a dispersed distribution in the Cu matrix for the 0.05 wt%CNTs-Mo/Cu composite, whereas a discontinuous network structure occurs in the 0.10 wt%CNTs-Mo/Cu composite. At 0.15 wt%CNTs-Mo, the complete continuous network architecture presents in the 0.15 wt%CNTs-Mo/Cu composite. Moreover, the Mo 2 C modified on the surface of CNTs forms a semi-coherent interface with Cu, which facilitates the enhancement on the interfacial bonding between CNTs and Cu. The 0.15 wt%CNTs-Mo/Cu composite with continuous network structure displays the maximum tensile strength of 455.1 MPa, the largest elongation of 39.1 % and the optimum fracture toughness of 22.4 MPa m 1/2 , while an excellent electrical conductivity of 93.2 %IACS can also be achieved simultaneously. Furthermore, the finite element simulations reveals that the network structure suppresses stress concentration and hinders crack propagation, thereby promoting load transfer. The first-principles calculation demonstrates that Cu-Mo 2 C and Mo 2 C-CNT heterostructures display the higher absolute value of binding energy and more obvious charge transfer than the CNT-Cu heterostructure, suggesting that the incorporation of Mo 2 C plays a crucial role in improving the interfacial stability and interfacial bonding strength of CNTs-Cu. The simultaneous improvement on strength and toughness of the 0.15 wt%CNTs-Mo/Cu composite can be attributed to strong interfacial bonding, effective load transfer, as well as crack deflection and bridging effects stemmed from the CNTs.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）