SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhipeng Guo,Wei Wei,Yihang Li,Xianghong Niu,Fengming Hou,Jin Li,Xiaoke Zhang,Xiuyun Zhang,Ang Wei
Single-atom photo-Fenton (PF) reaction is widely employed for the degradation of antibiotics and water disinfection. However, the key fundamental issues of the valence state cycling of single-atom metals and the activation of hydrogen peroxide (H 2 O 2 ) in the PF process remain indistinct. Herein, we developed a catalyst donated as Cu single atoms anchored hydrangea-like carbon nitride (Cu-SA/CNH) with Cu−N 4 coordination for PF reaction. Compared to pristine CNH, the Cu-SA/CNH exhibited a 2.42-fold increase in PF kinetics. The Cu-SA/CNH/PF system achieved 98.1% degradation efficiency of tetracycline and effectively inactivated Escherichia coli within 30 min. Density functional theory calculations demonstrated that the formation of Cu−N 4 effectively improved the energy of the Cu d orbitals, leading to the generation of intermediate states that facilitated the Cu 2+ /Cu + cycle. The adsorption capacity of Cu d xz orbitals on H 2 O 2 increased nearly 10 times. This work provides valuable insights for enhancing single-atom PF activity to address environmental pollution.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xin Zhao,Genyan Hao,Qiang Fang,Xuelei Lang,Dandan Li,Dazhong Zhong,Jinping Li,Qiang Zhao
Copper (Cu) electrocatalysts for carbon dioxide reduction reaction (CO 2 RR) have attracted much attention due to their ability to produce high value-added C 2+ products (e.g., C 2 H 4 , C 2 H 5 OH, and n-propanol). However, achieving high selectivity of Cu electrocatalysts for C 2 H 5 OH in aqueous-based electrolytes remains a significant challenge. In this paper, we report Cu octahedra modified with low-coordinated Cu nanoclusters (Cu oct @Cu_NCs) as an efficient electrocatalyst for CO 2 RR to C 2 H 5 OH. Notably, the defect-site-rich Cu nanoclusters can promote the adsorption of *CO and increase the *CO coverage on Cu octahedra enclosed by Cu(1 1 1), thus promoting CO 2 RR to C 2 H 5 OH. We achieved a high Faradaic efficiency (FE) of 48.16 % for C 2 H 5 OH, and that of the C 2+ products is 83.31 % at −1.17 V vs. RHE. This study provides a surface nanostructured route for rationalizing efficient and selective copper electrocatalysts for CO 2 RR.
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CHINESE CHEMICAL LETTERS
·
2024
·
IF 9.4
Junyi Yu,Yin Cheng,Anhong Cai,Xianfeng Huang,Qingrui Zhang
Herein, the Cu(III) synthesized from copper plating effluent was developed for the first time to evaluate the onsite degradation performance of heavy metal complexes in the wastewater, thus achieving the purpose of “treating waste with waste”. The results indicated that synthetic Cu(III) presented the excellent decomplexation performance for Cu(II)/Ni(II)-organic complexes. The removal efficiency of Cu(II)/Ni(II)-EDTA significantly increased with increasing Cu(III) dosage, and the degradation of Cu(II)/Ni(II)-EDTA by synthetic Cu(III) system displayed highly pH-dependent reactivity. The radical quencher experiments confirmed that Cu(III) direct oxidation were mainly involved in the degradation of Cu(II)-EDTA. Additionally, the continuous decarboxylation process was proven to be the main degradation pathway of Cu(II)-EDTA in Cu(III) system. The coexisting substances (SO 4 2− , Cl − and fulvic acids) showed little impacts at low level for the removal of Cu(II)/Ni(II)-EDTA, while retarded the degradation of Cu(II)-EDTA slightly at high level, which features high selective oxidation. Encouragingly, it was also effective to remove Cu(II)/Ni(II)-EDTA from in treating actual Cu/Ni-containing wastewater through synthetic Cu(III) treatment.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Bingbing Qiu,Banglong Shen,Junhao Dai,Donghui Zhang,Yanfang Wang,Huaqiang Chu
The development of efficient alkaline water electrolysis catalysts remains challenged by sluggish hydrogen evolution kinetics and insufficient active sites. Herein, a Cu-P-Co ternary electrocatalyst with pine-needle-like nanorod/nanosheet hybrid architecture is fabricated on nickel foam (Cu-P-Co/NF) via one-step electrodeposition. The introduction of Cu and P elements enables the formation of a well-defined Cu 3 P nanorod / Co 2 P nanosheet heterostructure. This unique hybrid architecture provides a vast number of accessible electrochemical active sites. Crucially, the advanced density functional theory (DFT) simulations elucidate that the established Cu 3 P@Co 2 P heterointerface drives substantial interfacial charge redistribution. This interfacial electronic interaction effectively modulates the local electronic structure of the Co sites, specifically inducing a downshift in the d-band center, which optimizes the hydrogen desorption free energy (ΔG H ⁎ ). More importantly, this electronic modulation directly optimizes the H 2 O adsorption free energy on the Co active centers, thereby significantly boosting their intrinsic HER activity in alkaline media. The Cu-P-Co/NF achieves an ultralow overpotential of 70 mV at 10 mA cm −2 in alkaline media, outperforming most reported Co-based electrocatalysts. This work demonstrates dual regulation of nanostructure engineering and electronic modulation under the ternary synergy through experimental coupling theory simulation calculation, providing a rational design paradigm for high-performance electrocatalysts.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Minjie Chen,Junjie Tan,Lei Liao,Hao Zou,Ning Pan,Hao Lei,Xiaoqin Nie
The rapid expansion of nuclear medicine has led to the accumulation of large volumes of iodine-containing radioactive wastewater, posing significant threats to both aquatic ecosystems and human health. To address this issue, an environmentally benign and structurally robust adsorbent, Cu-loaded MOF-808, was synthesized via a simple one-pot method. In static batch adsorption experiments, 0.2Cu/MOF-808(1.0) exhibited a maximum iodide adsorption capacity of 188.7 mg g −1 , with an improved Cu utilization efficiency of 51.5 %. Notably, the material maintained a considerable adsorption capacity of 38.3 mg g −1 even under strongly alkaline conditions (pH = 11.0). Moreover, it displayed excellent selectivity toward iodide in the presence of competing anions such as NO 3 − and SO 4 2− . Comprehensive spectroscopic characterization, including extended X-ray absorption fine structure (EXAFS) analysis, revealed a redox-mediated adsorption mechanism. Specifically, Cu 0 is oxidized to Cu + through interactions with carboxyl groups, followed by electrostatic attraction between Cu + and I − to form CuI, while additional bonding occurs between I − and Zr-O-Zr units to generate Zr-O-I linkages. Overall, this study demonstrates the successful preparation of 0.2Cu/MOF-808(1.0) and underscores its strong potential for efficient iodide removal from radioactive wastewater in nuclear medicine applications.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Zheng Wu,Changxin Dong,Xinhuan Niu,Jiakai Zhou,Chao He,Xinjie Li,Bin Hu,Jiahui Li
As technology nodes shrink below 10 nm, stricter demands are required for the one-step polishing of copper (Cu) films in ruthenium (Ru)-based Cu interconnects: a high Cu removal rate (RR) and a near-zero Ru RR. In this work, an eco-friendly slurry was newly formulated by combining hydroxyethylethylene diphosphonic acid (HEDP) and phytic acid (PA), both containing phosphate groups, to enhance corrosion inhibition and polishing performance during Cu/Ru CMP. Polishing and electrochemical experiments demonstrated that the synergistic inhibitors achieved a corrosion inhibition efficiency of 96 % for Cu. Under optimized conditions, the material removal rates (MRRs) of Cu and Ru reached 5432 Å/min and 10 Å/min, respectively, with a maximum removal rate selectivity (RRS) of 543:1 and surface roughness ( Sqs ) of 0.76 nm and 0.53 nm. Contact angle, coefficient of friction (COF), Ultraviolet–visible spectroscopy (UV–Vis), X-ray photoelectron spectroscopy (XPS) analyses confirmed the formation of a protective passivation film on Cu/Ru surfaces from both mechanical and chemical perspectives. Theoretical calculations identified the reactive sites of the inhibitors and simulated their adsorption behavior in a CMP environment, revealing that the synergistic inhibitors exhibited the highest adsorption energy. Without the use of surfactants, the multifunctional synergistic inhibitors improved surface quality through lubrication and passivation effects while reducing reagent consumption. This work provides both theoretical and practical guidance for the design of green and efficient CMP slurries in advanced semiconductor manufacturing.
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ChemistrySelect
·
2024
·Vol. 9
·期 17
·e202401101
·
IF 1.9
Xiangming Hu,Zhenyu Yang,Mingyue Wu,Yuntao Liang,Wei Wang,Fusheng Wang,Qian Zhang,Jingran Mao,Ning Yang,Xuwei Wang
Graphical This paper selectes MBioFs with copper ions as the metal center to design an MBioFs/PANI composite suitable for CO gas sensors. The morphology and nanostructure of the prepared materials were thoroughly analyzed, followed by testing their gas-sensing properties. Subsequently, the gas sensing mechanism of composite materials was proposed and discussed in detail. In addressing the issue of poor gas sensitivity in semiconductor CO sensor materials used in mining, such as pure PANI. This study utilized an ice-water bath in combination with an in-situ polymerization method to synthesize a new composite material consisting of Cu(II)-racemic glutamate nanofibers and PANI. The morphology, structure, and chemical bonds of the composite material were analyzed using scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) and spectral analysis. The material's ability to detect CO (100–500 ppm) at room temperature was investigated, revealing a response value of up to 6.8 % for 400 ppm CO detection when the composite material was deposited on a ceramic interdigital electrode. The material exhibited good selectivity and responsiveness to CO detection at room temperature, attributed to the heterojunction formed between Cu(II)-racemic glutamate nanofibers and PANI, which enhanced carrier migration. Consequently, the Cu(II)-racemic glutamate nanofiber/PANI composite(Cu(II)-RGlu/PANI) material shows promise as a high-performance sensing material for CO detection at room temperature and as a low-power, integrable sensor material for underground coal mines. This research contributes to the development of a theoretical framework for such applications.
研究领域:
材料科学
·
传感技术
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Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 13
·7300-7313
·
IF 14.511
Zhao Sun,Junpeng Liu,Rongjun Zhang,Yu Wu,Hongwei Li,Sam Toan,Zhiqiang Sun
Sorption-enhanced steam reforming of methanol (SE-SRM) is a promising approach to creating a high-purity hydrogen supply. However, catalysts suffer from activity deactivation and low CO2 uptake capacity. In this study, we investigate the role of Ga doping of Cu–MgO in SE-SRM by synthesizing a series of MgO embedded xGaCuMg catalytic sorbents via a sol–gel method. The TEM-EDX mapping results indicate that MgO nanoparticles can be successfully embedded in the bulk-phase of the catalytic sorbent with a stabilized microstructure. The results from in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) reveal that the Ga-doped catalytic sorbent is conducive to promoting the conversion of C-containing intermediates in SE-SRM, and absorbing CO2 in the form of bidentate carbonate rather than monodentate carbonate. Experimental studies verify that the best uptake capacity of 18GaCuMg catalytic sorbent (36.25 mg CO2/g MgO) achieves almost complete conversion of methanol (99.70%) with 100% H2 selectivity at 200 °C. Specifically, no CO is formed during the kinetic-control stage of SE-SRM. Density functional theory (DFT) calculations based on the Cu(111)Ga2O3(202)MgO(200) model revealed that the Ga doping can enhance the adsorption energies of methanol and carbon dioxide, promoting methanol activation and increasing CO2 uptake capacity. These findings provide valid strategies for functionalized nanomaterial design, which will substantially promote the SE-SRMR performance with desired catalytic sorbent recyclability.
研究领域:
材料科学
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催化化学
·
能源工程
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Xu-hong Han,Xue-wei Zhao,Kun Huang,Lei Yang,Qing Wang,Peng-fei Shi
Tracing copper ions levels in the environment and subcellular microenvironment is crucial due to the key role copper ions play in physiological and pathological processes. Herein, a novel naphthalimide-fused rhodamine probe Rh-Naph-Cu was prepared through modification with phenylhydrazine to produce a closed and non-fluorescent spirolactam. Based on the copper-induced spirolactam ring-opening and hydrolysis process, Rh-Naph-Cu can be employed as a fluorescence off–on probe for copper ions with high selectivity, high sensitivity (limit of detection: 33.0 nM), broad pH-response range (pH: 5.0–10.0), and color change visible with the naked eye. Rh-Nap-Cu could be made into test strips for the in-situ chromogenic detection of Cu 2+ . Significantly, Rh-Naph-Cu can be utilized for the detection of copper ions in living HeLa cells and zebrafish, and exhibits excellent lysosomal-targeting ability with high Pearson’s correlation coefficient (PCC) of 0.96.
研究领域:
生物化学
·
分子生物学
·
环境科学
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Ruirui Wang,Hasnain Nawaz,Linbo Huang,Sheng Zhong,Shuang Wei,Bin He,Ruixia Liu,Suojiang Zhang
Electrochemical CO 2 reduction to highly selective ethylene is particularly desirable yet challenging. The competition between methane and ethylene in the CO 2 RR process underscores the critical necessity of designing the catalyst for ethylene by suppressing the methane pathway. Herein, we introduced controllable Cu(II)/Cu(I) interfaces by regulating the ratio of ionic liquids (ILs) and H 2 O. The Cu x O-IL4 catalyst with main CuO/Cu 2 O structure, exhibits a high Faraday efficiency toward C 2 H 4 (∼54 %) and less CH 4 (∼1 %) under 250 mA·cm −2 current density at −1.18 V (vs RHE). Experimental and theoretical analyses demonstrate that Cu(I) sites favor CO bridge formation, while Cu(II) sites preferentially generate CO atop on Cu x O-IL4 catalysts. The Cu(II)/Cu(I) interface in Cu x O-IL4 facilitates the generation of CO bridge intermediates, thereby lowering the energy barrier for *CO dimerization and also preventing *CO hydrogenation to CH 4 formation, thus enhancing the selectivity of CO 2 -to-ethylene conversion. The study provides a novel approach for precisely controlling CO adsorption configurations to enhance CO 2 RR selectivity toward high-value multicarbon products formation.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Yanping Dong,Xiqiang Tian,Jinhui An,Pengyu Xu,Xinrui Wei,Muhammad Zahid
Achieving high activity, superior selectivity, and durable performance remains challenging for pristine MOFs in heterogeneous hydrogenation catalysis. Herein, nitrogen-doped carbon-wrapped Cu@Cu 2 O/NC heterogeneous catalysts enriched with Cu 0 –Cu + interfacial sites were readily derived by calcining Cu-MOF under an air atmosphere. Comprehensive characterization was conducted to examine synthesis-induced variations in bulk crystallinity, surface chemistry, and catalytic activity for Cu-MOF-250, Cu-MOF-350, and Cu-MOF-450. Compared to its counterparts, the Cu-MOF-350 catalyst exhibited optimal performance in the preferential hydrogenation of noxious 4-nitrophenol (4-NP) to valued 4-aminophenol (4-AP), maintaining high activity for up to ten consecutive rounds. The enhanced catalytic hydrogenation efficiency of the Cu-MOF-350 catalyst is ascribed to its distinctive nanostructural features, which originate from the synergistic interplay between Cu and Cu 2 O species. In addition, the improved uniform distribution of Cu@Cu 2 O nanoparticles generates higher concentration of interfacial exposed reactive Cu 0 /Cu + sites on the Cu-MOF-350 surface, which are considered crucial for the promoted hydrogenation of 4-NP.
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CATALYSIS LETTERS
·
2017
·Vol. 148
·期 1
·181-193
·
IF 2.799
Lin Jin,Guo Yafei,Chen Xiao,Li Changhai,Lu Shouxiang,Liew Kim Meow
Abstract Nanostructured CeO 2 supported CuO–MnO 2 (CuMn/Ce) catalysts were synthesized by wet co-impregnation method and compared with CuO/CeO 2 and MnO 2 /CeO 2 catalysts on CO oxidation. The former shows significantly higher catalytic activity toward CO oxidation than the bimetallic oxides catalysts with minimum T 50 . Dual synergistic effects in the interfaces of CuO–MnO 2 and CuO–CeO 2 shall be responsible for the higher oxidation performance of CuMn/Ce catalyst. As Cu/Mn mass ratio varies from 1/0.2 to 1/9, CO oxidation activities of the catalysts present unimodal distribution, and the catalyst with Cu/Mn = 1/1 shows the highest performance (T 50 = 45.8 °C; Ea = 24.11 kJ mol −1 ). Cu acts as CO dissociative adsorption sites, and Mn–Ce supplies activated O species from gas molecule and lattice oxygen, which are both indispensable for improving utilization efficiency of the reactants in the dual redox processes. The catalytic performance of catalyst is also vitally correlated with calcination temperature (160–320 °C). The optimum calcination temperature of CuMn/Ce catalyst is 320 °C. Catalyst characterization results indicate that the pretreatment at 320 °C is decent to obtain desired metal oxides along with fine texture properties. Graphical Abstract
研究领域:
催化化学
·
材料科学
·
环境化学
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