CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Aotian Gu,Kaiwei Chen,Xinyu Zhou,Chunhui Gong,Peng Wang,Yan Jiao,Ping Mao,Kai Chen,Jigen Lu,Yi Yang
Advanced oxidation processes based on high-valent metal species have attracted much attention due to their high reactivity and selectivity in degrading refractory organic pollutants, but the preparation of such catalysts remains a great challenge. Herein, FeCoCu-nitrogen-doped carbon (FeCoCu-NC), a trimetallic catalyst capable of producing high-valent metal species, was synthesized by direct carbonization of core–shell Metal-organic frameworks (MOFs). The rationally designed catalyst exhibited high catalytic activity in wide pH range and high resistance to common radical scavengers, anions and natural organics. The incorporation of Cu in FeCoCu-NC (TNC X ) not only enhanced the catalytic activity but also changed the activation mechanism of peroxymonosulfate (PMS) from a radical pathway to a non-radical pathway dominated by high-valent metal species. In addition, the TNC 5 /PMS system showed higher trichlorophenol (TCP) removal efficiency and PMS utilization compared to the radical-dominated FeCo-NC/PMS system and the 1 O 2 -dominated CoCu-NC/PMS system. This study provides a facile strategy to the preparation of advanced catalysts from multi-metal MOFs and is expected to provide guidance for the design of heterogeneous high-valent metal catalysts.
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Catalysts
·
2023
·Vol. 13
·期 5
·868
·
IF 3.9
Jun-Cai Hao,Rui-Xin Zhang,Miao Ren,Jia-Xuan Zhao,Zhi-Hua Gao,Lei Liu,Zhu-Xia Zhang,Zhi-Jun Zuo
Copper-based zeolite catalysts are widely used in methanol synthesis from methane oxidation, but their photothermal catalytic properties have seldom been explored. This study examines the effect of the preparation method on Cu-based zeolite composite graphite-phase carbon nitride catalysts (Cu-MOR/g-C3N4) for direct methanol synthesis from methane oxidation by photothermal catalysis. Four different preparation methods are employed: liquid phase ion exchange (Cu-MOR/g-C3N4-IE), isovolumetric impregnation (Cu-MOR/g-C3N4-IM), solid-state ion exchange (Cu-MOR/g-C3N4-GR), and hydrothermal synthesis (Cu-MOR/g-C3N4-HT). Cu-MOR/g-C3N4-IE shows the highest methanol yield (3.09 μmol h−1gcat−1) due to strong interactions between the CuxOyspecies and g-C3N4, as well as smaller interfacial charge transfer forces. This study provides a new method for the design and synthesis of catalysts for the conversion of methane.Keywords:Cu-MOR/g-C3N4;methane;methanol;photothermal catalysis;preparation method
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ACS Sustainable Chemistry & Engineering
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2023
·
IF 8.4
Huiwen Wang,Sihao Wu,Zoujun Peng,Xiulin Wang,Juanhua Lai,Ping Qiu
The quantitative analysis of glyphosate has significant implications for the evaluation of food quality and environmental safety risks. First, copper nanoparticles (Cu NPs) were synthesized using cetyltrimethylammonium bromide (CTAB) as a stabilizing agent, which resolved the limitation associated with atmospheric oxidation of Cu NPs and provided excellent fluorescence stability. Interestingly, the fluorescence of blue-emitting CTAB-Cu NPs was quenched by pH-responsive p-nitrophenol (p-NP) via Förster resonance energy transfer. Herein, a dual read-out sensor based on CTAB-Cu NPs and p-NP was constructed for glyphosate detection. Specifically, acetic acid (HAc) from acetylcholine (ACh) via hydrolysis catalyzed by acetyl cholinesterase (AChE) reduced the pH of the mixed solution and prevented the loss of protons from p-NP, which allowed the fluorescence emission by CTAB-Cu NPs. The presence of glyphosate inhibited the activity of AChE, and the increased pH resulted in proton loss. The fluorescence intensity of CTAB-Cu NPs was quenched, and the solution color changed from colorless to yellow with a UV absorption peak at 400 nm. The sensor can detect ultra-trace levels of glyphosate residues with a limit of detection of 5.43 ng/L. The obtained biosensor was successfully utilized to monitor the degradation of glyphosate in the roots of cabbage and cultivated soil.
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International Journal of Electrochemical Science
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2023
·
IF 1.5
Zejun Zhang,Yang Liu,Yuxin Zhu,Juan Zhou,Lisi Wang,Lina Zeng,Lin Li,Shuhai He,Wei Sun
A novel electrochemical sensor based on shrimp shell-derived porous carbon (SSPC) and Cu-melamine (Cu-Me) metal-organic frameworks composite modified electrode was proposed for sensitive determination of hydroquinone (HQ). The SSPC has the enlarged active surface area, the increased conductivity, and the loading ability of Cu-Me. Attributed to these impressive features, the detection signals of HQ is greatly amplified on the SSPC/Cu-Me modified glassy carbon electrode (GCE). Under the optimized conditions, the current response of HQ on SSPC/Cu-Me/GCE is linear in the range of 5.0-1800.0 μmol/L with detection limit down to 1.83 μmol/L (3ϭ). The SSPC/Cu-Me/GCE exhibited excellent selectivity, stability, and reproducibility, which was utilized to detect HQ successfully in lake water sample with satisfactory recoveries. This work is expected to attract greater attention to biomass/MOF composites for electrochemical sensing.
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PubMed
高影响因子
POLYHEDRON
·
2023
·
IF 2.6
Zhwan Naghshbandi,Mohammad Gholinejad,José M. Sansano
In recent years, the excellent pore volume, huge specific surface area, and easy functionalizable zeolitic imidazolate frameworks (ZIFs), as new type of porous materials, attracted the attention of scientists. In this work, the new Co-based trimetallic Cu-Ni@ZIF-67 was synthesized using embedded the Cu-Ni precursor in ZIF-67. The structure, morphology and properties of Cu-Ni@ZIF-67 was characterized by the various analysis. The catalytic performance of Cu-Ni@ZIF-67 was investigated for tetracycline (TC) degradation and nitroarenes reduction at room temperature. The resultant catalyst was demonstrated excellent TC degradation efficiency by persulfate (PS) activation in the water during 30 min, and Cu-Ni@ZIF-67 was displayed superior catalytic activity for nitroarenes reduction in the presence of NaBH 4 . Comparing catalytic activity of Cu-Ni@ZIF-67 with Cu/ZIF-67, Ni/ZIF-67, Cu-Ni and ZIF-67 indicated higher activity of Cu-Ni@ZIF-67. Moreover, the recyclability and stability of this catalyst were surveyed.
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International Journal of Electrochemical Science
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2023
·
IF 1.5
Saif Ullah,Rooh Ullah,Rasha M.K. Mohamed,Gang Hu,Ateeq ur rehman,Muhammad Yasir Nawabi,Asif Hayat,Ata Ur Rehman,Mehboob Hassan,Ikram Uddin,Syed Attaullah Shah,Muhammad Zahir Shah,Jimei Song
An appropriate analytical technique for determination of kaempferol (KMF) by its perturbation effect on Belousov-Zhabotinskii (B-Z) oscillating system was reported. The macrocyclic copper (II) complex [CuL] (ClO 4 ) 2 ] was used as a catalyst while malic acid as substrate in B-Z system. The ligand L in the macrocyclic-complex is 5, 7, 7, 12, 14, 14-hexamethyl-1, 4, 8, 11-tetraazacyclotetradeca-4, 11-diene. Experimental outcomes shown the perturbation effect of KMF could cause the change in the amplitude of oscillation (ΔA) which was directly related to its concentration (2.5 × 10 -6 to 3.0 × 10 -4 mol/L) with correlation coefficient of 0.99315. The calculated relative standard deviation (RSD) is 3.1 % by eight samples (1.8 × 10 -5 mol/L) and the observed lower limit of detection is 1.25 × 10 -6 mol/L. The cyclic voltammetry (CV) experiments were used to confirm the redox reaction between kaempferol and sodium bromate. Furthermore, the reaction perturbation mechanism was derived from the well-known FKN (Field-Koros-Noyes) oscillation mechanism.
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International Journal of Electrochemical Science
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2023
·
IF 1.5
Hui Yao,Wan-ting Zhang,Ting-yu Yan,Xiao-qin Li,Xiao-feng Wang
Metal-Organic Frameworks (MOFs) are promising materials in electrochemical sensor. Herein, Cu-doped zeolitic imidazolate framework (ZIF) was synthesized by hydrothermal method. The prepared composite was characterized by XRD, FTIR and SEM. Then the material was modified onto the surface of glass carbon electrode (GCE) with chitosan(CHIT) and Cytochrome C (cyt c ). The modified electrode showed good electrochemical activity toward the reduction of hydrogen peroxide (H 2 O 2 ). Under optimized conditions, the linear response of the sensor to H 2 O 2 ranges from 10～5200 μM, with a detection limit of 3.7 μM (S/N=3). Finally, the sensor was successfully applied to determine H 2 O 2 in water samples. Thus, the Cu-doped ZIF material has great potential for applications in electrochemical sensors.
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ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 28
·2301729
·
IF 19
Youyu Duan,Yang Wang,Weixuan Zhang,Jiangwei Zhang,Chaogang Ban,Danmei Yu,Kai Zhou,Jinjing Tang,Xu Zhang,Xiaodong Han,Liyong Gan,Xiaoping Tao,Xiaoyuan Zhou
Photocatalytic conversion of CO 2 into fuels using pure water as the proton source is of immense potential in simultaneously addressing the climate-change crisis and realizing a carbon-neutral economy. Single-atom photocatalysts with tunable local atomic configurations and unique electronic properties have exhibited outstanding catalytic performance in the past decade. However, given their single-site features they are usually only amenable to activations involving single molecules. For CO 2 photoreduction entailing complex activation and dissociation process, designing multiple active sites on a photocatalyst for both CO 2 reduction and H 2 O dissociation simultaneously is still a daunting challenge. Herein, it is precisely construct Cu single-atom centers and two-coordinated N vacancies as dual active sites on CN (Cu 1 /N 2C V-CN). Experimental and theoretical results show that Cu single-atom centers promote CO 2 chemisorption and activation via accumulating photogenerated electrons, and the N 2C V sites enhance the dissociation of H 2 O, thereby facilitating the conversion from COO* to COOH*. Benefiting from the dual-functional sites, the Cu 1 /N 2C V-CN exhibits a high selectivity (98.50%) and decent CO production rate of 11.12 µmol g −1 h −1 . An ingenious atomic-level design provides a platform for precisely integrating the modified catalyst with the deterministic identification of the electronic property during CO 2 photoreduction process.
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Biomaterials Science
·
2023
·Vol. 11
·期 10
·3589-3602
·
IF 6.6
Bo Huang,Wei Guan,Chaofeng Wang,Shuilin Wu,Zhenduo Cui,Yufeng Zheng,Zhaoyang Li,Shengli Zhu,Hui Jiang,Paul K. Chu,Xiangmei Liu
Charge transfer and separation play a critical role in the photocatalytic efficiency of photoresponsive materials and their subsequent applications. Herein, for the first time, we constructed a homo-heterostructured S–Cu–FC/CuS modified carboxymethyl cellulose (CMC) hydrogel doped with graphene oxide (GO) (S–Cu–FC/CuS/GO@CMC) through an in situ ionic complexation reaction, which exhibited enhanced photocatalytic performance under 808 nm near-infrared (NIR) light irradiation. On the one hand, photo-excited charges can rapidly transfer across the homo-heterojunction interface with copper atoms in S–Cu–FC/CuS as both donors and acceptors. On the other hand, the interface between GO and S–Cu–FC/CuS also favors the fast transfer of photogenerated charges. Hence, with the assistance of a photothermal effect, the enhanced photocatalytic performance of S–Cu–FC/CuS/GO endowed the hydrogel with robust sterilization ability for killing 99.5% S. aureus and 100.0% E. coli under 10 min NIR light irradiation. An in vivo test disclosed that this hydrogel could also accelerate the healing of bacteria-infected wounds.
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Journal of Cleaner Production
·
2023
·
IF 11.1
Yuanjia Luo,Yuqin Xia,Changtao Wang,Jianhua Chen,Leming Ou
The removal of arsenic has been an important issue due to the considerable harm that arsenic contamination does to the ecosystem, in this paper, calcium lignosulphonate (CLS) was the first time introduced as an environmentally friendly inhibitor for the selective Cu–As separation by froth flotation at low alkalinity, and its separation effect and mechanism was researched by flotation experiments, XPS measurements, and first-principles calculations. The single mineral and mixture mineral flotation experiment results consistently indicated that CLS can effectively realize the selective separation of arsenopyrite and chalcopyrite . The results of XPS experiment and first-principles calculation consistently indicated that CLS was selectively chemisorbed on the Fe site on the surface of arsenopyrite by forming the Fe–O bond through the interaction between sulfonate group (-SO 3 ) in its structure and surface Fe atom. However, the chemisorption of CLS on the Fe site on chalcopyrite surface was not found. Moreover, the CL 2− adsorption on arsenopyrite surface also can be promoted due to more attached Ca ion site while that on chalcopyrite surface remained weak due to the less attached Ca ion site. Overall, more LS 2− adsorption on the Fe site and attached Ca ion site on arsenopyrite surface caused the selective depression of arsenopyrite.
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MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2023
·
IF 6.4
He Zhang,Xiao-Chun Deng,Guo-Hua Zhang
In this study, high performance W–Mo–Cu–Ni–Fe alloy samples with additions of Mo (0–6 wt%), Ni and Fe (total content: 2.5 wt% and 5 wt%) were obtained through liquid-phase sintering at lower temperature, with the raw material of ultrafine W–Mo–Cu–Ni–Fe composite powder. Ultrafine W–Mo–Cu–Ni–Fe alloy powder with strong sintering activity and uniform composition was obtained by two-stage reduction means composed of carbothermic pre-reduction and hydrogen deep deoxidation steps. Significantly, the bonding ability of W/Cu phase interface and the wettability of two phases are greatly improved due to the presences of Ni and Fe. Moreover, the addition of appropriate Mo content was advantageous to the formation of W–Mo solid solution . All alloy samples achieved higher densification degrees to guarantee that the sintered blocks possess outstanding overall performances. Especially, by adjusting Ni/Fe ratio, the highest tension strength and elongation of were achieved by W-2wt.%Mo-1.75 wt%Ni-0.75 wt%Fe-27.5 wt%Cu sintered block, which were 567 MPa and 10.37%, respectively. Moreover, owing to the presences of W–Mo and Cu–Ni–Fe solid solutions, this alloy also had the highest microhardness and bending strength of 446 HV and 1473 MPa, respectively. As increasing Mo content from 0 wt% to 6 wt%, the compression strength of sintered blocks was improved, and failure strains of all the sintered blocks are close to 100%, respectively. However, even though the Cu matrix network structure is more evenly distributed as a result of the existences of added Ni and Fe, the electronic movement ability of the sintered blocks was reduced, leading to a significant decrease in conductivity.
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ChemNanoMat
·
2023
·Vol. 9
·期 4
·e202300037
·
IF 3.8
Yiqi Liang,Jun Wang,Zhidong Tian,Kezheng Shang,Xiang Hu,Jiaqi Yu,Pingwei Cai,Yangjie Liu,Jun Yuan,Yichun Ding,Zhenhai Wen
Graphical The development of Zn ion energy storage devices is seriously hindered by the drawbacks of dendrite growth, low coulomb efficiency, and volume expansion in the plating/stripping process of Zn metal electrodes. In this paper, the electrode which optimized by chemically plating Sn on Cu foam with high surface area and high HER overpotential can provide a large number of active sites for homogeneous nucleation of Zn metal and alleviate HER side reactions, thus improving the reversibility of Zn electrodeposition. Zn ion energy storage devices have received widespread attention because of their high safety, environmental friendliness, low cost, and high energy density. However, Zn metal anodes usually suffer from disadvantages such as dendrite growth, low coulombic efficiency, and volume expansion during plating/stripping, which severely hampers the practical applications. Here, we construct 3D Zn frameworks by exploring different conductive hosts and modify 3D hosts by plating Sn to suppress Zn dendrites and side reactions. The electrode which optimized by electroplating Zn after chemically plating Sn on Cu foam (Sn−Cu foam@Zn) exhibits stable polarization voltage distribution and almost 100% coulombic efficiency over 200 cycles of Zn plating/stripping. Furthermore, when pairing with V 2 O 5 cathode, the full cell showed fast reaction kinetics and a capacity of 113 mAh g −1 after 1000 cycles at a current density of 1 A g −1 , which is 90.4% of the initial capacity. This work provides a new strategy for the development of high-performance Zn anodes.
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