Nanoscale
·
2015
·Vol. 7
·期 32
·13775-13783
·
IF 7.394
Yu Zhang,Pengli Zhu,Gang Li,Wenzhao Wang,Liang Chen,Daoqiang Daniel Lu,Rong Sun,Feng Zhou,Chingping Wong
Highly stable monodispersed nano Cu hydrosols were facilely prepared by an aqueous chemical reduction method through selecting copper hydroxide (Cu(OH)2) as the copper precursor, poly(acrylic acid) (PAA) and ethanol amine (EA) as the complexing agents, and hydrazine hydrate as the reducing agent. The size of the obtained Cu colloidal nanoparticles was controlled from 0.96 to 26.26 nm by adjusting the dosage of the copper precursor. Moreover, the highly stable nano Cu hydrosols could be easily concentrated and re-dispersed in water meanwhile maintaining good dispersibility. A model catalytic reaction of reducing p-nitrophenol with NaBH4 in the presence of nano Cu hydrosols with different sizes was performed to set up the relationship between the apparent kinetic rate constant (kapp) and the particle size of Cu catalysts. The experimental results indicate that the corresponding kapp showed an obvious size-dependency. Calculations revealed that kapp was directly proportional to the surface area of Cu catalyst nanoparticles, and also proportional to the reciprocal of the particle size based on the same mass of Cu catalysts. This relationship might be a universal principle for predicting and assessing the catalytic efficiency of Cu nanoparticles. The activation energy (Ea) of this catalytic reaction when using 0.96 nm Cu hydrosol as a catalyst was calculated to be 9.37 kJ mol−1, which is considered an extremely low potential barrier. In addition, the synthesized nano Cu hydrosols showed size-dependent antibacterial activities against Pseudomonas aeruginosa (P. aeruginosa) and the minimal inhibitory concentration of the optimal sample was lower than 5.82 μg L−1.
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JOURNAL OF NANOPARTICLE RESEARCH
·
2018
·Vol. 20
·期 11
·1-8
·
IF 2.127
Sui Ning,Wang Ke,Bai Qiang,Wang Lina,Wang Tao,Xiao Hailian,Liu Manhong,Colvin Vicki L.,Zhang Qingbo,Yu William W.
Dendritic Pt–Cu nanoparticles were synthesized by a facile one-step method with the help of surfactant Brij58 at room temperature, and we also studied the effects of different Pt–Cu ratios on the morphology and size of nanoparticles. In addition, we further tuned the morphology of the Pt–Cu nanostructures by introducing bromide ions, eventually leading to the appearance of some tripod-like structures. Compared with dendritic Pt–Cu and commercial Pt black, these tripod-like Pt–Cu nanostructures exhibited higher electrocatalytic activity and CO tolerance for catalyzing methanol oxidation.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Ping Qiu,Shouwu Xu,Kaili Zhang,Zhongyuan Jiang,Daming Gong,Changfeng Chen
Cu@Cu 2 O films were prepared by electrochemical deposition method. The obtained Cu@Cu 2 O films were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), confocal Raman spectroscopy (CRS), UV–visible absorption spectroscopy and Photoluminescence (PL) spectroscopy. Electrochemical measurements were performed under intermittent visible light illumination to assess the photoelectrochemical cathodic protection effect of the prepared Cu@Cu 2 O films. The results indicated that a lower deposition potential could facilitate the reduction of Cu 2 O grain size together with an increase number of Cu. But the deposition potential has no obvious influence on the band-gap of the composite films, which exhibited n-type semiconductor properties. The open circuit potential of 304 stainless steel by coupling with the Cu@Cu 2 O-0.3 V films presented the most negative shift of −179 mV under visible-light illumination. The related photocurrent density was 0.13 mA·cm −2 . The photoelectrochemical conversion mechanism and the photoelectrochemical cathodic protection effects of the Cu@Cu 2 O films were discussed in detail.
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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.
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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.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Rong Guo,Hong Liu,Qian He,Xiangyang Chen,Ye Ma,Minggang Zhao
CuO/Cu-TCPP was prepared by a low-energy and environmental condition process. • Interfacial barrier–driven sensing mechanism ensures high anti-interference ability. • The Cu-TCPP acts as a adsorption layer, enriching glyphosate and resisting interference. • Glyphosate adsorption dynamically tunes the heterojunction barrier for detection. • The sensor achieves 1.27 nM LOD and reliable performance in complex matrices. The widespread use of glyphosate has posed significant threats to the environment and human health, underscoring the importance of accurately detecting glyphosate in diverse environmental. However, conventional electrochemical sensors often rely on enzyme-mediated recognition to achieve selectivity, making them susceptible to environmental interference and limiting their practical applicability. Herein, we report a tunable barrier–driven sensor based on CuO/Cu-TCPP core-shell structure for highly sensitive and selective GLY detection. The Cu-TCPP shell serves dual functions: acting as a specific adsorption layer to selectively enrich glyphosate while repelling competing molecules, and serving as a physical gating switch that dynamically modulates the heterojunction barrier through adsorption of negatively charged glyphosate to trigger efficient electron transfer. Crucially, this physical-gating-based barrier modulation mechanism exponentially amplifies the current signal while physically shielding interference from analogous redox species, thereby achieving highly selective and sensitive detection. The fabricated sensor demonstrates a broad linear response (60–6000 nM) with an ultralow detection limit of 1.27 nM, supporting its potential application in environmental monitoring. More broadly, this work provides mechanistic insight into adsorption-regulated interfacial barrier modulation and offers a strategy for the rational design of enzyme-free electrochemical sensors for environmental contaminants. In this study, a CuO/Cu-TCPP core-shell heterostructure was constructed for glyphosate sensing. The Cu-TCPP shell serves both as a specific adsorption layer and a responsive switch. On the one hand, it can enrich glyphosate and suppress interfering substances. On the other hand, glyphosate adsorption can regulate the potential barrier at the heterojunction interface, promote electron transfer and trigger electrochemical signals. Under light exposure, its performance improvement is more obvious. This mechanism significantly enhances the sensing sensitivity and selectivity. The sensor maintains good linearity within the range of 60–6000 nM, with a detection limit as low as 1.27 nM. It also demonstrates stable and reliable detection performance in complex environmental samples, providing a new strategy for high-performance organophosphorus pesticide sensing. Download: Download high-res image (132KB) Download: Download full-size image
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CATALYSIS TODAY
·
2019
·
IF 4.888
Yunxia Zhao,Hui Ge,Yuanyuan Miao,Jiaxin Chen,Wei Cai
Metal-organic framework (MOF) materials have significant advantages for capturing CO 2 . To further improve the CO 2 adsorption performance of MOFs, a compound material of l -arginine modified graphene oxide (GO) with MOFs (MOF/GO-Arg) was synthesized. Introduction of amino acid-functionalized lamellar GO into MOF material not only generated new pores at their interface to improve the adsorption of the MOF but also promoted the CO 2 capture at low humidity. The structural and chemical properties of the parent components and composite materials were analyzed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), N 2 adsorption-desorption, thermal analysis and scanning electron microscopy (SEM). The dynamic CO 2 adsorption properties of the materials were compared under different temperatures, flow rates and humidities. Three kinetic models were used to fit the adsorption curves of the as-synthesized adsorbents under different conditions, and then the optimal dynamic model was determined. Since the reusability of the adsorbents is especially important for the use of these materials in practice, the CO 2 adsorption was repeated for 10 cycles under optimal temperature, flow rate and high humidity conditions.
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Catalysis Science & Technology
·
2019
·Vol. 10
·期 5
·1248-1255
·
IF 5.726
Lei Wang,Yang Wang,Chang-Wu Zhang,Jing Wen,Xuefei Weng,Lei Shi
Minimizing the use of platinum while maximizing its catalytic activity is attractive but challenging in the development of industrially important platinum catalysts. Herein, using a hexagonal boron nitride (h-BN) nanosheet-supported Pt/Cu cluster catalyst, we report the promotion of the platinum utilization efficiency and catalytic performance for the dehydrogenation of propane. Specifically, as little as 100 ppm platinum exhibits high propane conversion (∼15%) and propylene selectivity (>99%) at a relatively low reaction temperature (520 °C); the formation rate of propylene reaches 7.3 mol molPt−1 s−1, which is about 10 times higher than the best value for the reported Pt/Cu single-atom alloy catalyst. The structural analysis reveals that the abundant fault edges of the h-BN nanosheets and strong bonding of copper with the edge B–O defects maintain the unique geometry of the Pt/Cu cluster, together with the metallic platinum ensemble stabilizing on the top layer of the copper cluster, leading to remarkable improvement in catalytic efficiency. This prominent promotion in catalytic efficiency is also exemplified using other supports including Al2O3, SBA-15 and SiC as counterparts.
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APPLIED CLAY SCIENCE
·
2016
·
IF 2.586
Wenbo Wang,Guangyan Tian,Zhifang Zhang,Aiqin Wang
A new eco-friendly hybrid Mg, Al-silicate adsorbent with superior adsorption properties for Cu(II) was prepared by a one-step hydrothermal process using earth-abundant low-grade palygorskite (PAL) as the starting materials and non-toxic sodium carbonate as the assistant. The structural characterizations by scanning electronic microscopy (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), BET adsorption-desorption isotherms and Zeta potential analyses confirm that part of rod-like PAL crystals were in-situ transformed as smectite sheets, and the hybrid silicate adsorbents with rod/sheet transition formulation were formed. Under the action of alkaline, some inert Si O Si(or M) bonds were broken as –Si–O − groups, which not only make the adsorbent having extremely negative surface charge (− 46.4 mV), but also strengthen the chelating and holding capability of the adsorbent to Cu(II). The silicate adsorbent shows high adsorption capacity of 229.9 mg/g for Cu(II), which can capture 98.95% of Cu(II) from 200 mg/L of Cu(II) solution at the dosage of 2.6 g/L (only 64.5% for raw PAL). The intensified electrostatic attraction , ion-exchange, and chemical association of Si-O − surface groups with Cu(II) primarily contribute to the improved capture capability for Cu(II).
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xingling Zhao,Xue Zhou,Yupei Xia,Zihan Xu,Mingjun Song,Zihan Wang,Qingjie Guo,Zaiyong Jiang
Catalytic oxidation of carbon monoxide (CO) by Cu/Al 2 O 3 has garnered increasing interest in recent years due to its promising application prospects. Numerous investigations conducted on the Cu/Al 2 O 3 system, but its catalytic performance for CO oxidation is still not as promising as that of precious metal catalysts. Increasing the loading amount of the active Cu on Al 2 O 3 surface is a feasible method for improving its activity. However, with the increase of Cu loading, the agglomeration and enlargement of Cu particles is inevitable, which reduces the active Cu amount. Therefore, the utilization rate of Cu atoms is not high and the catalytic performance often can not further rise. Enhancing active Cu loading amount as high as possible is a prerequisite to further enlarge the activity of Cu/Al 2 O 3 catalyst. Herein, self-synthesized Al 2 O 3 nanofibers (Al 2 O 3 -nf) with high specific surface area and abundant penta-coordinated aluminum (Al V ) are used as the support to maximize the Cu loading amount by chemical vapor deposition (CVD). And commercially available α-Al 2 O 3 is used for comparative experiment. The high specific surface area could make Cu high dispersion on Al 2 O 3 , even at 20 wt% Cu loads, which is beneficial to high concentration load of active Cu. The catalytic activity of Cu/Al 2 O 3 -nf-CVD gradually increases with the increase of Cu loading from 2 wt% to 20 wt%, exhibiting a clear linear correlation with the surface content of Cu 0 on the catalyst. Meanwhile, this result confirms that Cu 0 plays a crucial role in CO oxidation of Cu/Al 2 O 3 . However, commercial α-Al 2 O 3 reaches its highest activity when the Cu load is 5%, and then its activity begins to decrease due to the agglomeration of particles. Moreover, Cu/Al 2 O 3 -nf-CVD also exhibits remarkable thermal stability for CO oxidation. This work highlights a new strategy to synthesis of high Cu loading amount, high activity and thermostable Cu/Al 2 O 3 catalyst for low-temperature oxidation of CO.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Lu Yuxuan,Yue Feng,Liu Tianyang,Huang Yu-Cheng,Fu Feng,Jing Yu,Yang Hengquan,Yang Chunming
The synergistic Cu 0 -Cu + sites is regarded as the active species towards NH 3 synthesis from the nitrate electrochemical reduction reaction (NO 3 - RR) process. However, the mechanistic understanding and the roles of Cu 0 and Cu + remain exclusive. The big obstacle is that it is challenging to effectively regulate the interfacial motifs of Cu 0 -Cu + sites. In this paper, we describe the tunable construction of Cu 0 -Cu + interfacial structure by modulating the size-effect of Cu 2 O nanocube electrocatalysts to NO 3 - RR performance. We elucidate the formation mechanism of Cu 0 -Cu + motifs by correlating the macroscopic particle size with the microscopic coordinated structure properties, and identify the synergistic effect of Cu 0 -Cu + motifs on NO 3 - RR. Based on the rational design of Cu 0 -Cu + interfacial electrocatalyst, we develop an efficient paired-electrolysis system to simultaneously achieve the efficient production of NH 3 and 2,5-furandicarboxylic acid at an industrially relevant current densities (2 A cm −2 ), while maintaining high Faradaic efficiencies, high yield rates, and long-term operational stability in a 100 cm 2 electrolyzers, indicating promising practical applications.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.4
Wei Xiang,Yueting Liao,Jinwei Cui,Yangyang Fang,Bining Jiao,Xuesu Su
Antibiotic adsorbents are getting significant attention due to the hazards posed by the accumulation of tetracycline antibiotics in water, which can adversely impact human and environmental health. Bimetallic organic frameworks (BMOFs) exhibit considerable potential in adsorption owing to their dense pore structures and synergistic effects. However, synthesizing efficient, low-cost, and easy-to-prepare BMOFs faces several challenges. Here, we describe the practical synthesis of a series of Fe/Cu-bimetallic organic frameworks (Fe/Cu-MOFs) using simple room-temperature aqueous solvent methods. The pore size structure of Fe/Cu-MOFs is determined by the Fe/Cu ratio employed in the synthesis process. Remarkably, when the Fe/Cu molar ratio was 1:2, the void ratio of Fe/Cu-MOFs increased to 0.7326 cm 3 /g, with a predominant mesoporous structure, and the maximum tetracycline (TC) adsorption capacity exhibited by Fe/Cu-BTC-1/2 was reported at a Q max of 1130.23 mg/g. The adsorption kinetics followed the quasi-second-order kinetic model, and the adsorption isotherms were consistent. The Fe/Cu-BTC-1/2 was effective throughout a wide pH range (6.0–10.0), exhibiting resilience against ionic interference and enabling recycling. The predominant mechanisms of TC adsorption by Fe/Cu-BTC-1/2 include coordination, vacancy filling, and π-π stacking. Thus, our research provides an excellent adsorbent for TC antibiotics and novel insights into the simple synthesis of BMOFs and their application in environmental remediation.
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