Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Xiao Liang,Qiu-Lan Li,Wen-Bo Zhao,De-Zhi Yang,Ya-Ling Yang,Zi-Tao Zhong
Given the potential risks posed by the toxic heavy metal ion Cr 3+ to environmental and human health, the development of fast, simple, and visible detection methods for Cr 3+ is critical to control its detrimental effects. This study presents a sensitive and selective colorimetric method for Cr 3+ analysis, leveraging the laccase-like activity of Co,Zn@Cu-MOF(V B3 ), which was synthesized via a microwave digestion approach. The usage and proportion of precursors (vitamin B3 and CuCl 2 ) were examined to obtain the material exhibiting the optimal catalytic activity and response to Cr 3+ . The well-designed Co,Zn@Cu-MOF(V B3 ) exhibited remarkable laccase-like activity at pH of 5.8, and can oxidize the colorless substrate (2,4-dichlorophenol) to red product with 4-aminoantipyrine as the chromogenic agent. The findings indicate that Cr 3+ induces a decrease in absorbance at 505 nm. Under optimal conditions, the absorbance was linearly proportional to the Cr 3+ concentration in the range of 0.68–679.25 ng/mL, achieving a detection limit of 0.124 ng/mL. The method also displays robust anti-interference performance against other metal ions, and was successfully applied in the determination of Cr 3+ in water samples, yielding recoveries ranging from 90.2 % to 108.8 %.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Liman Chen,Yang Yang,Guixiang Wang,Yanli Wang,Simon Ochieng Adede,Meng Zhang,Caishan Jiao,Di Wang,Dashuai Yan,Yibo Liu,Duanjie Chen,Weibing Wang
A new three-layered film was fabricated on magnesium (Mg) alloy via electroplating to guard against corrosion in a chloride aqueous environment, which consisted of an underlying double-layered zinc/copper (Zn/Cu) and a top aluminum–zirconium (Al–Zr) layer. The Zn/Cu underlayers not only impeded the galvanic corrosion between the Al–Zr coating and Mg alloy but also improved the adhesive ability between the substrate and the upper Al–Zr layer. Herein, we discussed the nucleus sizes of Al–Zr coatings at the stage of nucleation carried out with different contents of ZrCl4 in AlCl3–1-butyl-3-methylimidazolium chloride ionic liquid. The sandwichlike three-layered Zn/Cu/Al–Zr coatings were systematically investigated by surface morphology, phase structure, hardness, anticorrosion performances, and first-principles calculations. The corrosion current density declined from 1.461 × 10–3 A·cm–2 of bare Mg to 4.140 × 10–7 A·cm–2 of the Zn/Cu/Al–Zr3 sample. Neutral salt spray testing demonstrated that the Zn/Cu/Al–Zr3 sample showed no evident signs of corrosion after 6 days of exposure. The enhancement of the corrosion protection property was related to the fact that the application of the Cu layer changed the corrosion direction from initial longitudinal corrosion to extended lateral corrosion and the top Al–Zr coating hindered the transmission of aggressive ions. In addition, upon increasing the Zr content in the alloy films, the Fermi energy reduced initially and then increased. The Al–Zr3 alloy with 8.3 atom % Zr showed the lowest Fermi energy (−3.0823 eV), which exhibited the most efficient corrosion protection. These results showed that the prepared three-layered coating provided reliable corrosion protection to Mg alloy and may thus promote its practical applications.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2014
·
IF 4.058
Liang Xiao,Ya Xiong,Shuanghong Tian,Chun He,Qingxian Su,Zhanhao Wen
A coordination supramolecular polymer, [Cu(bipy)(SO 4 )] n , was prepared as an adsorbent. It has a molecular structure of one-dimensional chain with dense adsorption sites. Three divalent dyes including Congo red, Orange G and Reactive Brilliant red X-3B were tested as pollutants in the adsorption study. The adsorbent showed extraordinary adsorption capacity for all three dyes, reaching 2429 mg/g, 915 mg/g and 1333 mg/g for Congo red, Reactive Brilliant red X-3B and Orange G, respectively. The Langmuir isotherm model can well describe the adsorption isotherm. In kinetic study, all of the three dyes presented a model of pseudo second-order. According to the kinetic rate constants, the adsorption processes are very fast and different for three dyes. The difference can be attributed to the divalent character and the different structure of the dye’s molecule. Based on their discrepancy of adsorption velocity, separation of dyes was attempted through kinetic separation between Congo red and X-3B. A separation coefficient was developed, which can well describe the separation performance results. The results show that the two dyes can be separated quickly and efficiently by [Cu(bipy)(SO 4 )] n .
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 35
·355601
·
IF 3.551
Yanping Fang,Xiangzhe Zeng,Yuanzhi Chen,Mingwei Ji,Hongfei Zheng,Wanjie Xu,Dong-Liang Peng
Building core–shell structures is a valuable method of enhancing the oxidation-resistance performance of Cu nanoparticles for practical applications in the field of printed circuit boards. In this study, Cu@Ni core–shell nanoparticles are synthesized via an injection solution approach utilizing Cu seeds produced during the reactions to induce the epitaxial growth of Ni shells. The thickness of the Ni shell can be controlled by varying the Cu:Ni molar ratios in the injected precursor solution, whereas changing the injection rate of the Cu precursor solution affects the size of the Cu seeds and thus controls the eventual size of the core–shell nanoparticles. Thermogravimetric analysis reveals a superior thermal stability against oxidation for Cu@Ni core–shell nanoparticles, as compared with Cu nanoparticles. The oxidation resistance of Cu@Ni conductive films increases with an increase in the Ni:Cu ratio, while the conductivity increases with a decrease in the Ni:Cu ratio. A relatively low resistivity of 27.4 µΩ cm is achieved for Cu@Ni conductive films. The results demonstrate that coating Cu nanoparticles with Ni shells via epitaxial growth can form closed shells with smooth surfaces which are valuable for Cu nanoparticles in applications where oxidation resistance is a requirement .
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qihao Wang,Yingxue Du,Yuecheng Gong,Weiping Xiao,Hongdong Li,Yunmei Du,Guangrui Xu,Zexing Wu,Lei Wang
Developing durable, effective and inexpensive electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) are crucial for the advancement of water splitting as a solution to the energy shortage. In this study, nanospheres stacked into nanochains are successfully prepared by oxidative corrosive engineering, solvothermal, and following calcination process (Co-Cu 3 P/CF). The unique nanochain structure facilitates growing the specific surface area, thereby exposing plenitude active sites. The introduced phosphorus (P) and Co ions can alter the electronic characteristics of metal phosphides, not only can accelerate the electron transport of the catalysts, but speed up the reaction kinetics. Thus, the prepared Co-Cu 3 P/CF exhibits low overpotentials, with 240/84 mV, in alkaline media for OER/HER to attain 10 mA cm −2 . In alkaline freshwater/seawater, the self-assembled electrolyzer needs only 1.51/1.58 V to achieve 10 mA cm −2 . This work provides an approach for the preparation of high-performing and economical electrocatalysts.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Pei Qiu,Jinyan Xiong,Mengjie Lu,Lijun Liu,Wei Li,Zhipan Wen,Weijie Li,Rong Chen,Gang Cheng
Solar-driven photocatalytic H 2 evolution could tackle the issue of fossil fuels-triggered greenhouse gas emission with sustainable clean energy. However, splitting water into hydrogen with high performance by a single semiconductor is challenging because of the poor charge separation efficiency. Herein, a novel ternary Cu@TiO 2 -Cu 2 O hybrid photocatalyst with multiple charge transfer channels has been designed for efficient solar-to-hydrogen evolution. Indeed, the ternary Cu@TiO 2 -Cu 2 O hybrid by coupling Cu@TiO 2 with Cu 2 O nanoparticles shows highly-efficient photocatalytic hydrogen generation with rate of 12000.6 μmol·g −1 ·h −1 , which is 4.4, 2.1, and 1.9 times higher than the pure TiO 2 (2728.8 μmol·g −1 ·h −1 ), binary Cu@TiO 2 (5595.5 μmol·g −1 ·h −1 ), and TiO 2 -Cu 2 O (6076.8 μmol·g −1 ·h −1 ) composite, respectively. In such a Cu@TiO 2 -Cu 2 O hybrid, the formed internal electric field in the TiO 2 -Cu 2 O p-n junction allows the electrons in Cu 2 O to migrate to TiO 2 , while the electrons in the CB of TiO 2 could flow into Cu via the Schottky junction at the Cu@TiO 2 interface. In this regard, a multiple charge transfer is achieved between the Cu@TiO 2 and Cu 2 O, which facilitates promoted charge separation and results in the construction of electron-accumulated center (Cu) and hole-enriched surface (Cu 2 O). This p-n/Schottky junctions with steered charge transfer assists the hydrogen production upon the Cu@TiO 2 -Cu 2 O ternary photocatalyst.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Fangqi Yang,Chang Jiang,Mingfeng Ma,Fenghao Shu,Xinyu Mao,Weikang Yu,Jun Wang,Zheling Zeng,Shuguang Deng
Electrochemical reduction of CO 2 into formic acid (HCOOH) is an appealing approach to mitigate the CO 2 emission problem and achieve a carbon-neutral cycle but remains a challenge. Herein, we present a novel strategy to prepare Cu nanoparticles embedded in carbon substrate (Cu NPs@C) as efficient CO 2 reduction reaction electrocatalysts for highly selective HCOOH production. The uniformly distributed Cu nanoparticles are responsible for the high faradaic efficiency of HCOOH of 78% at −1.0 V (RHE) and yield of 82.8 μmol h −1 cm −2 at −1.2 V (RHE). Moreover, the detailed density functional theory (DFT) calculations have demonstrated that the high activity and selectivity for HCOOH production was attributed to the synergy effects of exposed Cu (111) facets and carbon substrate. The charges transferred from Cu induces a charge-rich environment on the carbon surface, which enhances the *OCHO adsorption and boosts the HCOOH formation. This work paves a new way to synthesize novel Cu-based electrocatalysts for efficient production of HCOOH.
✓ 已验证
DOI
高影响因子
Green Synthesis and Catalysis
·
2024
·
IF 8.2
Shaixiao Tian,Xinying Ge,Qipeng Yan,Min Li,Qun Huang,Xinhua Zhang,Ming Ma,Bo Chen,Jian-bo Wang
We report for the first time the combination of directed evolution focused on enhancing and reversing the stereoselectivity of an enzyme with Cu(I)-mediated click chemistry (CuAAC), providing an asymmetric click approach for versatile chiral triazoles products. In this study, the halohydrin dehalogenase HheG was used as the enzyme which was evolved to induce a stereoselective ring-opening reaction of cyclic epoxides in the presence of NaN 3 with the formation of chiral azido products. Two mutants of opposite stereopreference were generated, which convert cyclohexene oxide as well as cycloheptene oxide to (1 S , 2 S )-2-azidocyclohexanol, (1 R , 2 R )-2-azidocyclohexanol, (1 S , 2 S )-2-azidocycloheptanol and (1 R , 2 R )-2-azidocycloheptanol with essentially high stereoselectivity. The chiral products were then subjected to CuAAC in reactions with structurally different alkynes. Since HheG was found to be compatible with Cu(I), the process was also performed successfully in a unique 2-step one-pot process leading to various chiral triazoles. In order to understand the enhancement and reversal of the evolved enantioselectivity, QM and MD computations were performed. This approach harnesses the modifiability and high stereoselectivity of the evolved biocatalysts in combination with click chemistry. It holds great potential for diverse fields, particularly in the area of pharmaceuticals.
✓ 已验证
DOI
高影响因子
ANALYST
·
2022
·Vol. 147
·期 23
·5324-5333
·
IF 5.227
Jie Zhang,Xue-Ji Zhang,Serge Cosnier,Dan Shan
In the rapid development of artificial nanomaterials comparable to biological enzymes, we propose herein a novel concept for the construction of functional materials inspired from chemical evolution. To mimic the formation process of the catalytic system for the origin of life, dicyandiamide (DCD) was used as an elemental molecule for the de novo synthesis of an electrocatalyst. DCD was initially condensed with glucose (Glu) to form carbon dots (CDs) via a hydrothermal method. The self-assembly of the DCD-derived CDs was then modulated by introducing copper ions and a controlled pyrolysis process. Carbonization of the self-organized DCD-CDs/Cu at 300 °C in air produced the resultant catalyst (DCD-CDs/Cu-300) with the crystalline properties of a transitional state from an organic to inorganic matter, possessing a well-tuned chemical composition and the enhanced electrochemical signal of H2O2 reduction. Therefore, the DCD-CDs/Cu-300 modified electrode provides satisfactory analytical performance for trace H2O2 quantification with a wider linear range (1.0 × 10−7 to 1.4 × 10−3 M) and low detection limit (6.4 × 10−8 M, S/N = 3). This facile electrocatalyst construction strategy inspired from chemical evolution is expected to pave the way to form a more unified paradigm by integrating nanotechnology.
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 22
·6782-6794
·
IF 6.177
Yuxi Xu,Huijiang Huang,Lingxin Kong,Xinbin Ma
Copper–zirconium catalysts have been extensively applied in the hydrogenation of carbon–oxygen bonds such as in CO2 and esters. However, high-performance Cu/ZrO2 catalysts with low copper loading for dimethyl oxalate (DMO) hydrogenation to ethylene glycol (EG) are seldom reported. Herein, we fabricated 5 wt% Cu/ZrO2 catalysts by a co-precipitation method and investigated the effect of calcination temperature on the catalyst structure and the corresponding catalytic performance. The crystallization and migration of zirconium and copper species are not simultaneous when increasing the calcination temperature, so the elemental composition of Cu and Zr species is different on the surface and in the bulk CuZrO2 solid solution. The crystalline morphology of ZrO2 is transformed from a-ZrO2 to t-ZrO2 and m-ZrO2 and copper dispersion is also changed. The CZ-600 catalyst has the largest copper dispersion, surface area of Cu0 and Cu+ and strongest H2 adsorption ability, which endow this catalyst with the best catalytic performance. However, TOF values are the largest for the CZ-550 catalyst with a larger ratio of Cu+, oxygen vacancies and Zr3+, which suggests the interfacial synergy between Cu and ZrO2 in DMO hydrogenation. And further increasing the calcination temperature to above 700 °C will cause the aggregation and sintering of copper nanoparticles and deteriorate the hydrogenation reactivity.
✓ 已验证
DOI
高影响因子
Small
·
2024
·
IF 13
Jing Gao,Yuan Gao,Jinghua Hao,Xiaolin Sun,Fuhua Zhao,Yuan Zhang,Wenyan Si,Jianfei Wu
All-solid-state lithium sulfide-based batteries (ASSLSBs) have drawn much attention due to their intrinsic safety and excellent performance in overcoming the polysulfide shuttle effect. However, the sluggish kinetics of Li 2 S cathode severely impede commercial utilization. Here, a Cu + , I − co-doping strategy is employed to activate the kinetics of Li 2 S to construct high-performance ASSLSBs. The electronic conductivity and Li-ion diffusion coefficient of the co-doped Li 2 S are increased by five and two orders of magnitude, respectively. Cu + as a redox medium greatly improves the reaction kinetics, which is supported by ex situ X-ray photoelectron spectroscopy. Density functional theory calculation (DFT) shows that Cu + , I − co-doping reduces the Li-ions diffusion energy barrier. The co-doped Li 2 S exhibits a remarkable improvement in capacity (1165.23 mAh g −1 (6.65 times that of pristine Li 2 S) at 0.02 C and 592.75 mAh g −1 at 2 C), and excellent cycling stability (84.58% capacity retention after 6200 cycles at 2 C) at room temperature. Moreover, an ASSLSB, fabricated with a lithium-free (Si─C) anode, obtains a high specific capacity of 1082.7 mAh g −1 at 0.05 C and 97% capacity retention after 400 cycles at 0.5 C. This work provides a broad prospect for the development of ASSLSBs with practical energy density exceeding that of traditional lithium-ion batteries.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xufeng Yue,Yuwen Wang,Yingxin Zhao,Hongyu Xiang,Song Shu,Peng Zhang,Jiacheng Zhang,Jiaqing Xue,Jinwei Liu,Deping Yu
The preparation of self-supported catalytic electrodes with high activity, characterized by advantages such as binder-free composition and substantial mass loading through a straightforward and efficient process, is crucial for advancing both scientific research and industrial applications of electrocatalysis technology. In this study, we propose an integrated strategy involving cold plasma synthesis & printing to prepare a Cu-NiF self-supported catalytic electrode. By injecting atomized copper chloride solution into the Ar plasma jet, size-uniform copper hydroxide nanoparticles were synthesized and printed on the nickel foam surface. Hydroxyl radicals produced by plasma exciting water molecules react with the copper ions to synthesize copper hydroxide nanoparticles. The polar groups grafted on the nickel foam surface control the nucleation and crystallization process of nanoparticles for high throughput and high uniformity printing. Finally, the prepared Cu-NiF electrode exhibited a reduction efficiency of 88.89% in an electrocatalytic nitrate reduction reaction.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）