INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Jingrui Hu,Zaihua Duan,Chong Tan,Yi Wang,Zhen Yuan,Yadong Jiang,Huiling Tai
Recently, the self-powered electrochemical humidity (ECH) sensors have received extensive attention. In this work, a self-powered ECH sensor is constructed based on cellulose nanocrystals (CNC)/NaCl humidity sensing material, and Cu and Zn electrodes. The results show that the proposed CNC/NaCl ECH sensor has good humidity sensing and power generation performances. Specifically, it has a wide humidity detection range (10.9 %–91.5 % relative humidity (RH)), fast response/recovery speed (27/22 s), and good linearity (41.1 %–91.5 % RH) at room temperature of 25 °C. A single CNC/NaCl ECH sensor can achieve high response voltage of 0.62 V, large short-circuit current (∼20 μA) and load power (∼4.48 μW) at 91.5 % RH. In addition, this work verifies the potential application of the CNC/NaCl ECH sensor in respiratory rate detection.
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RSC Advances
·
2017
·Vol. 7
·期 14
·8484-8490
·
IF 3.108
Hui Xue,Lun Peng,Yishi Dong,Yuqing Zheng,Yafei Luan,Xiang Hu,Gaojian Chen,Hong Chen
In this paper, novel star glycopolymers were synthesized via Cu(0)-mediated radical polymerisation at ambient temperature. The reaction was fast with little star–star coupling. Moreover, star glycopolymers can be obtained without removing oxygen from the polymerisation mixture. The effects of solvent and the ratio of initiator/catalyst/ligand on polymerisation were investigated, and the optimal conditions for the synthesis of star glycopolymer were determined. In addition, the binding ability between synthesised glycopolymers and concanavalin A (ConA) was studied using a turbidity test and quartz crystal microbalance-dissipation (QCM-D). Compared with linear glycopolymers, star glycopolymers showed higher binding ability to specific lectins and the strongest binding was obtained when the molecular weight was medium.
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BIOSENSORS & BIOELECTRONICS
·
2022
·
IF 12.545
Siyu Luo,Fanglei Liu,Siyu Gu,Ke Chen,Guohai Yang,Yingqiu Gu,Juntao Cao,Lu-Lu Qu
Food-borne pathogens are one of the leading causes of food poisoning, which vigorously affect food safety and human health. Therefore, the development of early and rapid detection methods for food pollution evaluation is the key to food safety and quality control. Herein, a simple and inexpensive photoelectrochemical (PEC) sensor is developed for highly selective and ultrasensitive detection of Staphylococcus aureus (S. aureus). The technique is based on “signal-off” that employs Cu–C 3 N 4 –TiO 2 heterostructures as photoactive materials and monolayer Cu–C 3 N 4 nanozyme as a signal amplifier. In the presence of S. aureus , the aptamer-modified Cu–C 3 N 4 (Cu–C 3 N 4 @Apt, a signal amplifier) and S. aureus were specifically anchored on the surface of the ligand-modified photoelectrode . The Cu–C 3 N 4 @Apt nanozyme acted as a peroxidase to catalyze the oxidation of 4-chloro-1-naphthol (4-CN) to produce insoluble precipitate on the electrode surface and resulted in a significant decrease in photocurrent . Based on the signal-amplification by the Cu–C 3 N 4 @Apt nanozyme, the constructed PEC sensor demonstrated a wide linear range between 10–10 8 CFU/mL for the S. aureus detection with the detection limit (LOD) as low as 3.40 CFU/mL. Furthermore, the PEC sensor was capable of determining S. aureus in spiked orange juice and milk, with the recovery of 91%–113%, indicating the reliability of the sensor for S. aureus detection in real samples. This investigation provides a feasible strategy for the design of highly selective and ultrasensitive PEC sensors to determine analytes in complex systems.
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PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2019
·Vol. 411
·期 17
·3801-3810
·
IF 3.286
Huang Yuanlin,Liang Guangzhao,Lin Tianran,Hou Li,Ye Fanggui,Zhao Shulin
The convenience of colorimetric sensors is useful for practical applications. In this work, we constructed a novel colorimetric sensor with magnetic separation ability that can be operated in nearly neutral conditions and achieve one-step detection of metabolites. Magnetic Cu doped Fe 3 O 4 @FeOOH magnetic nanocomposite (Cu/Fe 3 O 4 @FeOOH) with an oxygen vacancy was prepared by a one-step self-assembly hydrothermal method, and fully characterized by different methods. The oxygen vacancy generated by the incorporation of Cu 2+ cations into the Fe 3 O 4 @FeOOH structure was confirmed to be a vital reactive site for enhancing the catalytic activity, which opens up a new way of designing highly efficient enzyme mimics. Benefiting from its inherent horseradish-peroxidase-like activity, a simple and selective enzyme-based colorimetric sensor was developed for one-step detection of H 2 O 2 and cholesterol, and 3,3′,5,5′-tetramethylbenzidine was catalyzed by H 2 O 2 to generate a colored product of oxidized 3,3′,5,5′-tetramethylbenzidine for signaling. H 2 O 2 and cholesterol can be linearly detected in the same range from 0.01 to 0.4 mmol L -1 with detection limits of 0.0075 mmol L -1 and 0.0082 mmol L -1 , respectively. The proposed colorimetric sensor has satisfactory reusability, accuracy, and practicability in human serum samples, indicating its potential application for the detection of different metabolites in the fields of life science and analytical science.
Graphical abstract
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PubMed
高影响因子
ACS Sensors
·
2025
·
IF 9.1
Huiyu Su,Chaofan Ma,Chaoqi Zhu,Jiahong Tang,Lingfei Luo,Kechen Zhou,Xiaoxia Wang,Dawen Zeng
Conventional metal oxide sensors often lack sufficient sensitivity due to limited adsorption sites. Loading clusters is an effective surface-modification strategy. In this work, CuO clusters of approximately 3 nm were highly dispersed on high-surface-area SnO2 nanoboxes. TEM confirmed the cluster sizes and dispersion degrees of the CuO clusters, while Raman and XPS collectively confirmed that CuO modifies the electronic structure of the SnO2 support and induces the formation of new oxygen vacancies. The optimized Cu/SN-2 sensor exhibited a response of 39.25 toward 10 ppm ethyl methyl carbonate (EMC) at 130 °C, which is 1.92 times higher than that of SnO2 nanoboxes (20.46 at 140 °C). The diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) indicated that CuO lowers the activation energy for EMC decomposition, producing intermediates like CO2, methanol, and ethanol at lower temperatures, thus reducing the sensor operating temperature. The density functional theory (DFT) calculations confirmed that Cu sites act as negatively charged centers, promoting EMC adsorption and enhancing sensitivity. This work offers a simple, low-cost surface modification route to improve gas sensing. Furthermore, as EMC is a common electrolyte in lithium-ion batteries, its leakage poses safety risks. Integrating such EMC sensors into battery safety systems can enable ultraearly leak warnings, helping prevent fires and explosions.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Xiaoxia Zhang,Yongjin Wang,Junjie Liao,Jiancheng Wang,Liping Chang,Weiren Bao
Coke oven gas (COG) is a hydrogen-rich byproduct whose efficient utilization requires deep removal of organic sulfur compounds such as thiophene . While Cu-based sorbents exhibit excellent desulfurization performance, the influence of precursor structural characteristics on their activity remains poorly understood. In this study, the relationship between precursor assembly and desulfurization performance of unpromoted Cu/ZnO/Al 2 O 3 sorbents was systematically elucidated. Three synthesis routes were explored to tailor precursor structures, revealing that aurichalcite-derived precursors enable superior Cu dispersion, stronger Cu-Zn interaction, and enhanced reducibility of active sites. The optimized sorbent prepared via urea hydrolysis achieved an exceptional breakthrough sulfur capacity of 29.91 mg/g—nearly twice that of hydrotalcite-derived counterparts—without the use of additional promoters. Mechanistic analysis further demonstrates that the precursor structure governs the formation of highly reducible Cu species and promotes thiophene activation through improved hydrogenation pathways. These findings provide new insights into the design of high-performance Cu-based sorbents.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·Vol. 46
·期 6
·118066
·
IF 6.2
Rui-Hua Chen,Suniya Siddique,Hua-Jing Zhang,Ning Chen,Zhuo-Ming Xu,Zi-Long Zhang,Yue-Xing Chen,Zhuang-Hao Zheng,Fu Li
Herein, a Ti/Cu co-doping strategy is employed in Bi 2 SeS 2 to optimize its electrical and thermal transport properties through carrier regulation and microstructure modulation. The Ti/Cu co-doped Bi 2 SeS 2 samples were synthesized by mechanical alloying followed by spark plasma sintering. It is found that the co-doping boosts electrical conductivity while preserving a moderate Seebeck coefficient of 150–200 μV K −1 . This yields a high power factor of 5.5 μW cm −1 K −2 at 773 K. Moreover, the lattice thermal conductivity is reduced to ∼0.25 W m −1 K −1 , primarily due to effective phonon scattering induced by lattice strain and point defects. Finally, a peak zT of ∼0.80 is achieved at 773 K in Bi 1.96 Ti 0.04 SeS 2 -1 %Cu, surpassing the solely Cu-doped and Ti-doped counterparts by ∼22 % and 40 %, respectively. These findings reveal that multi-element doping is an effective approach for tailoring both charge and phonon transport, providing valuable insights for the design of advanced thermoelectric materials.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yixin Peng,Luwen Qian,Xianbo Sun,Long D. Nghiem,Fei Pan,Jing Ji,Yongdi Liu,Zhengqing Cai
This study introduces Cu into the CoFe 2 O 4 structure via a one-step hydrothermal method, creating a polymetallic (Cu/CoFe 2 O 4 ) catalyst with synergistic dual reaction centers. Material characterization reveals that Cu incorporation facilitates the formation and maintenance of low-valent Cu + and Fe 2+ species. Synergistic Cu + /Cu 2+ and Co 2+ /Co 3+ redox couples efficiently shuttle electrons, facilitating the rapid reduction of Fe 3+ (the rate-limiting step) and boosting H 2 O 2 activation efficiency across a wide pH range. The optimized Fenton system achieved complete ofloxacin (OFX) removal within 120 min and high mineralization under neutral conditions (pH 7), exhibiting a reaction rate 19 times higher than pristine CoFe 2 O 4 . The surface-bound •OH was identified as the primary reactive species (56 % contribution) and O 2 •− as secondary contributors. During the reaction, the •OH concentration reached 411 μM within the initial 5 min followed by slower accumulation, with the secondary reaction rate constant between •OH and OFX to be 1.55 × 10 10 M −1 ·s −1 . The O 2 •− generation rate was 1.81 × 10 −8 M·s −1 , and the secondary reaction rate constant between O 2 •− and OFX was 1.08 × 10 7 M −1 ·s −1 . The dominance of surface-bound •OH provides intrinsic tolerance to bulk solution pH fluctuations, explaining the system's high efficiency at neutrality. The material maintained over 95 % efficiency in continuous-flow pilot operation over 75 h, demonstrating exceptional potential for industrial implementation. Toxicity assessment via seed germination and theoretical calculation indicated reduced ecotoxicity of treated effluent. These findings highlight the material's broad pH adaptability, practical efficacy in complex water matrices, and potential for antibiotic wastewater remediation.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yi Wang,Jiaxin Liu,Qixin Wang,Yuan Xu,Qianling Zhang
The electrocatalytic nitrate reduction reaction (NO 3 − RR) is a promising and economic green alternative to the traditional Haber-Bosch process for ammonia (NH 3 ) production. However, it suffers from high overpotential and poor NH 3 selectivity due to various competing reactions. In this study, we developed a CuO/Co 3 O 4 nanoneedle heterostructure catalyst grown on nickel foam. After electro-activation to Cu/Co 3 O 4 , it achieved nearly 100 % NH 3 selectivity in both alkaline and neutral electrolytes across a wide range of potentials. The catalyst showed a high NH 3 yield rate of 617.14 μmol h −1 cm −2 at −0.2 V vs. reversible hydrogen electrode along with an excellent stability over a 120-hour test. The mechanism involves CuO reducing to Cu, forming a heterostructure that modifies the electronic environment of Co sites, the synergistic Cu and Co 3 O 4 interfaces enhancing rapid *NO 3 adsorption and lowering the energy barriers for NH 3 production, thereby facilitating the overall efficiency even at low concentrations (0.01 M NO 3 − ).
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FUEL
·
2025
·
IF 7.5
Shaorui Jia,Junhong Ma,Xinbo Zhang,Chaoyun Ma,Xue Yu,Zhaohui Chen,Xudong Wang,Guirong Zhang
Photothermal catalytic CO 2 hydrogenation via the reverse water–gas shift (RWGS) reaction enables sustainable CO production under mild conditions. However, the advancement of this promising technology is critically dependent on the development of high-performance catalysts, which continues to pose a key challenge in the field. Herein, a series of Cu x Zn 1-x Co 2 O 4 spinel catalysts with full solar spectrum absorption were synthesized via co-precipitation to synergize photothermal energy for efficient CO 2 conversion. The Cu/Zn co-doping strategy not only enhanced light absorption but also introduced abundant oxygen vacancies, fostering the formation of frustrated Lewis pairs (FLPs) that destabilize CO 2 ′s linear configuration and weaken C=O bonds. The optimized Cu 0.5 Zn 0.5 Co 2 O 4 catalyst demonstrated exceptional performance, achieving a CO 2 conversion rate of 418.7 mmol·g cat −1 ·h −1 with 93.1 % CO selectivity at 350 °C under light irradiation, alongside stable operation for more than 10 hours. The experimental characterization combined with theoretical calculation reveal that Cu 0.5 Zn 0.5 Co 2 O 4 possesses abundant oxygen vacancies, predominantly localized at the Zn tetrahedral sites. These structural defects play a crucial role in generating more active FLP sites, which in turn leads to significantly improved CO 2 activation efficiency. In-situ diffuse reflectance infrared Fourier transform spectroscopy ( in-situ DRIFTS) investigation elucidates key intermediates and the catalytic mechanism. This work provides a strategy for designing efficient non-precious metal photothermal catalysts through bimetallic doping and defect engineering to enhance CO 2 utilization.
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高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Wentao Ye,Wenxing Yang
Resolving the competitive adsorption of ions and water at the electrified surface is vital for understanding the local microenvironments controlling all surface reactions. Herein, we conducted thorough in situ spectroscopy studies of the microenvironments of electrified Cu during its electrochemical CO2 reduction reaction (CO2RR) utilizing in situ attenuated total reflection infrared absorption spectroscopy. The potential-dependent evolution of various solution species, including cations, anions, and interfacial water, was systematically resolved. The formation of adsorbed CO (COads), the key reaction intermediate for the CO2RR, was found to involve notable displacement of interfacial water and the formation of free H2O isolated from the bulk hydrogen-bonding framework. The general trend of ion and water movement was verified to be universal for all the utilized alkali cations (Li+, Na+, K+, and Cs+), with the cation size additionally modifying the interfacial water density. Unlike the classical view of a stationary electric double layer structure and cation effects at the electrified surface, we propose that “cation–water–COads” may be considered as a better collective elementary building block of these ubiquitous surfaces for further mechanistic discussion of CO2RR and related electrocatalytic systems.
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CORROSION SCIENCE
·
2024
·
IF 7.4
Zebang He,Zhong Wu,Zhiming Gao,Zhenbo Qin,Juntao Yuan,Yuan Gao,Yaorong Feng,Anqing Fu,Chun Wang,Wenbin Hu
A Ni-Al-Cu coating was prepared on NAB alloy through electroplating and heat treatment, and the erosion-corrosion behaviors were investigated. The results demonstrated that Ni-Al-Cu coating exhibited higher erosion resistance compared to NAB alloy, with an average reduction of 63 % in material removal rate (MRR). It was revealed that deformation and cracks were observed in NAB, with loss of hard κ and β phases alongside deformation of ductile α phase. Meanwhile, Ni-Al-Cu coating experienced fatigue delamination and grain disintegration due to alternating stress. Taguchi design method showed that increasing flow velocity and sand concentration could enhance the intensity of gravel impact, while changes in the erosion angle affected gravel impact modes and energy transfer, thereby impacting corrosion performance. Additionally, empirical equations for the material removal rate were derived through regression analysis, which became possible to predict the MRR under different influencing factors and assess the erosion-corrosion resistance of materials.
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