CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Sainan Wang,Chao Yuan,Wei Chen,Yifan Niu,Yexi Yan,Fan Li,Hongmei Jiang
A series of CuO@g-C 3 N 4 composites with different contents of g-C 3 N 4 and different morphologies of CuO have been designed and prepared by hydrothermal method and applied to activate peroxymonosulfate (PMS) for the removal 2,4,6-trichlorophenol (2,4,6-TCP). The results showed that 3D spherical shape CuO-1@g-C 3 N 4 -3, being able to activate PMS to produce a large amount of singlet oxygen ( 1 O 2 ), not only had good catalytic performance, but also reduced the dissolution of Cu 2+ . By comparing the morphological characteristics, catalytic performance, free radical species, decomposition rate of PMS and surface properties of three kinds of CuO, the generation mechanism of 1 O 2 and key reasons of CuO for producing 1 O 2 were deeply explored and finally deduced. Besides, under the conditions of initial pH 7.0, catalyst dosage 50 mg·L −1 , PMS dosage 0.3 mmol·L −1 and initial concentration of 2,4,6-TCP 10 mg·L −1 , the removal rate of 2,4,6,-TCP reached 94 % at 25 min in the first cycle, and 85 % in the fifth cycle. When CuO-1@g-C 3 N 4 was applied in actual water samples, 65 % of 2,4,6-TCP was removed in the Yangtze River, and 60 % of 2,4,6-TCP in Xuanwu and Yueya Lake in 40 min. Quenching experiments and electron paramagnetic resonance (EPR) were used to indentify active species during degradation process and the degradation intermediates of 2,4,6-TCP and possible degradation pathways were determined and proposed by high performance liquid chromatography-time of flight-mass spectrometry (HPLC-TOF-MS 2 ). This study shed light on the 1 O 2 generation mechanism of catalyst and provided theoretical basis and guidance for the design of 1 O 2 catalysts rich in non-radical active species.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 32
·16883-16890
·
IF 14.511
You Xu,Youwei Sheng,Mingzhen Wang,Tianlun Ren,Keke Shi,Ziqiang Wang,Xiaonian Li,Liang Wang,Hongjing Wang
Electrochemical nitrate reduction to ammonia emerges as an attractive and promising technology for nitrate removal from water and simultaneous ammonia electrosynthesis, which demands electrocatalysts with high activity and selectivity. Herein, we designed CuO@MnO2 1D core–2D shell hierarchical nanoarrays supported on a copper foam substrate (CuO@MnO2/CF) for electrocatalytic nitrate-to-ammonia conversion. The decoration of CuO 1D nanowire arrays with MnO2 2D nanosheets brings about abundant exposed active sites and facilitates mass transfer. More importantly, the CuO/MnO2 heterogeneous nanointerface affords a well-designed built-in electric field in the interface region, which could trigger interfacial accumulation of nitrate ions and accelerate nitrate electroreduction kinetics by optimizing the chemisorption of nitrate ions or/and reaction intermediates. With these properties, an impressive electrocatalytic nitrate-to-ammonia capability was achieve over CuO@MnO2/CF (nitrate conversion: 99.38%, ammonia faradaic efficiency: 94.92%, and ammonia selectivity: 96.67%). This study opens new avenues for the rational construction of efficient electrocatalysts for nitrate removal and ammonia electrosynthesis.
✓ 已验证
产品关联
DOI
高影响因子
Chemosensors
·
2022
·Vol. 10
·期 7
·286
·
IF 4.229
Yonghuan Su,Lixia Su,Bingqian Liu,Youxiu Lin,Dianping Tang
A highly sensitive self-powered photoelectrochemical (spPEC) sensing platform was constructed for Hg2+determination based on the g-C3N4-CdS-CuO co-sensitized photoelectrode and a visible light-induced redox cycle for signal amplification. Through successively coating the single-layer g-C3N4, CdS, and CuO onto the surface of an electrode, the modified electrode exhibited significantly enhanced PEC activity. The microstructure of the material was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). However, the boost in photocurrent could be noticeably suppressed due to the consumption of hole-scavenging agents (reduced glutathione) by the added Hg2+. Under optimal conditions, we discovered that the photocurrent was linearly related to the Hg2+concentration in the range of 5 pM–100 nM. The detection limit for Hg2+was 0.84 pM. Moreover, the spPEC sensor demonstrated good performance for the detection of mercury ions in human urine and artificial saliva.Keywords:g-C3N4-CdS-CuO composites;self-powered photoelectrochemical assay;Hg2+detection;redox cycle signal amplification
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Fanchao Zeng,Yongxia Zhu,Baofang Jin,Yongjun Ji,Lei Shi,Guangwen Xu,Dongxing Fu,Ziyi Zhong,Fabing Su
Multi-component promoters may efficiently improve the catalytic performance of the primary Cu-based catalysts in the Rochow-Müller reaction, but this approach is not well explored, and the roles of the promoters are not very clear. Herein, we report the ZrO 2 -supported CuO catalyst (CuO/ZrO 2 ) modified with a co-promoter of ZnO, Sn, and CuP prepared by a simple dry ball-milling method. The co-promoter could significantly increase the amount of surface adsorbed oxygen and improve the reducing ability of catalysts, facilitating the formation of the active Cu 3 Si phase and further advancing dimethyldichlorosilane ((CH 3 ) 2 SiCl 2 , M2) selectivity and Si conversion in the Rochow-Müller reaction. Compared to the state-of-the-art commercial catalyst, these CuO/ZrO 2 catalysts with the co-promoters all showed enhanced catalytic activity. Especially, the CuO/ZrO 2 catalyst with the co-existence of ZnO, Sn, and CuP promoters achieved the highest M2 selectivity and Si conversion, attributed to its most abundant surface adsorption oxygen and the strongest reducibility. This work opens up a new avenue to improve the catalytic activity of Cu-based catalysts for the Rochow-Müller reaction.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Gen Wang,Lei Ge,Zhuoyue Liu,Xiurong Zhu,Shengjiong Yang,Kun Wu,Pengkang Jin,Xiangkang Zeng,Xiwang Zhang
Heterogeneous activation of peroxydisulfate (PDS) by transition metal oxides offers a promising strategy for organic pollutants removal but suffers from low electron transfer efficiency. Herein, layered MgO supported CuO nanoparticles was prepared by thermal conversion of metal-phenolic networks of Cu 2+ /Mg 2+ and tannic acid. CuO nanoparticles (∼2 nm) were spatial monodispersed on layered MgO, inducing the formation of electron deficient Cu 3+ and surface oxygen vacancies and thus facilitated adsorption and activation of PDS. The electron-rich CuO/MgO hybrid catalysts manifested good catalytic performance of PDS activation for organic pollutants removal. At 0.18 g/L of CuO/MgO hybrid catalyst and 0.2 mM of PDS, complete removal of bisphenol A (BPA) was achieved with a high kinetic constant (0.1 min −1 , 50 min). Quenching experiments, electron paramagnetic resonance tests, PDS decomposition behaviors, electrochemical analysis and in situ ATR-FTIR and Raman spectroscopy revealed a nonradical pathway of electron transfer for PDS activation. The CuO/MgO hybrid catalysts exhibited wide working pH range from 3 to 11, selective oxidation capability, good resistance to halide ion and high utilization efficiency of PDS, and thus would be a promising candidate for wastewater remediation.
✓ 已验证
产品关联
DOI
高影响因子
Biosensors-Basel
·
2023
·Vol. 13
·期 11
·959
·
IF 5.4
Guo-Ying Chen,Ling-Xiao Chen,Jin Gao,Chengyu Chen,Jianli Guan,Zhiming Cao,Yuanjia Hu,Feng-Qing Yang
In this work, dopamine (DA) was polymerized on the surface of CuO nanoparticles (CuO NPs) to form a molecularly imprinted polymer (MIP@PDA/CuO NPs) for the colorimetric detection of astragaloside-IV (AS-IV). The synthesis process of MIP is simple and easy to operate, without adding other monomers or initiators. CuO NPs has high peroxidase (POD)-like activity that can catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to generate oxidized TMB (OxTMB) in the presence of H2O2, having a maximum ultraviolet-visible (UV-Vis) absorption peak at 652 nm. The AS-IV can specifically bind to the surface imprinted cavities and prevent the entry of TMB and H2O2, which will lead to the inhibition of the catalytic reaction. Therefore, a new approach based on the POD-like activity of MIP@PDA/CuO NPs for AS-IV detection was developed with a linear range from 0.000341 to 1.024 mg/mL. The LOD and LOQ are 0.000991 and 0.000341 mg/mL, respectively. The developed method can accurately determine AS-IV in Huangqi Granules and different batches of Ganweikang Tablets, which are similar to the results measured by HPLC-ELSD and meet the requirements of Chinese Pharmacopoeia (2020 edition) for the amount of AS-IV in Huangqi Granules. The combination of MIP with CuO NPs not only endows the detection of AS-IV with high selectivity and reliability, but also expands the application of nanozymes in the detection of small-molecule compounds that have weak UV absorption, and do not have reducibility or oxidation properties.Keywords:molecularly imprinted polymer;astragaloside-IV;peroxidase-like activity;CuO nanoparticles;nanozyme
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Jingtong Yu,De Sun,Bingbing Li,Dongmin Yue,Yanxia Ge,Rui Xu,Hao Liang,Xiaowei Song,Dafeng Zhai
Current scientific advances in wastewater treatment have slowed the pressure on water access. Membrane distillation (MD) was a promising technology for wastewater treatment. However, for the treatment of the spraying wastewater containing high boiling point organic solutions, high energy dependence and membrane wetting by the water-soluble organics with high concentrations were the limitations of the MD process. Herein, Janus photothermal membranes (JPTM) were prepared by chemical plating and then surface oxidation under alkaline conditions. The flower-like CuO hydrophilic photothermal layer which acted as the light trap and anti-wetting armor was constructed on the PVDF hydrophobic membrane surface. In the process of photothermal membrane distillation, when the CuO hydrophilic photothermal layer contacted with feed solution, due to the arrangement of the hydrophilic hydroxyl heads of the organics on the hydrophilic photothermal layer, and the hydrophobic alkyl tails faced the water molecules and repelled them. The light was trapped in the hydrophilic photothermal layer and repeatedly refracted by the flower-like CuO. The flower-like CuO was further optimized by controlling alkali concentration. When the alkali concentration was 2.5 M, the photothermal conversion of JPTM with the moonflower-like CuO hydrophilic photothermal layer was up to 92.86%. When single component high boiling point organic solutions (BCS or DB) were treated by MD, under 1 sun irradiation (1 kW m −2 ), the permeate fluxes achieved 2.68 and 2.91 kg m −2 h −1 with over 98% removal of organics; Further, for the treating of spraying wastewater, it had a high permeate flux of 5.13 kg m −2 h −1 , a photothermal efficiency of 90.79%, and a removal rate of 62%. The JPTM was a low-carbon technology to improve heat and mass transfer for wastewater treatment by photothermal membrane distillation.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2023
·Vol. 108
·期 3
·721-733
·
IF 2.5
Chen Gaokui,Shen Qiuwan,Li Shian,Zhang Xin,Cai Zhongwen,Yang Guogang
The CuO modified LaCoO 3 @CuO-x catalysts were prepared through sol-gel method, and applied for methanol steam reforming (MSR). The catalysts were characterized by means of XPS, XRD, SEM, BET, TEM and EDS techniques. XPS and XRD analyses show that the synthesized catalysts are the combination of LaCoO 3 and CuO. The results of XPS also demonstrated that the Co ion in perovskite exhibits a mixed valence state of Co 3+ and Co 2+ , and the presence of Co 2+ contributes to the reduction of Cu 2+ to copper and also promotes the formation of hydrogen. The results of SEM and TEM show that LaCoO 3 @CuO-0.2 catalyst with core-shell type has porous structure, which contributes to expedite the contact between the reaction medium and the catalyst surface, therefore, improving the catalytic performance. The results of the pore size show that LaCoO 3 @CuO-0.2 exhibits remarkably large pores compared with other catalyst samples. The MSR experimental results illustrate that LaCoO 3 @CuO-0.2 has the optimal catalytic performance, and the methanol conversion of LaCoO 3 @CuO-0.2 is 100%. In addition, the stability of LaCoO 3 @CuO-0.2 was evaluated under the optimum operating parameters (the catalytic temperature, LHSV and W/M are 873 K, 20 h −1 and 4:1, respectively). The results show that the developed LaCoO 3 @CuO-0.2 has excellent stability within 50 h without deactivation. Graphical abstract
The LaCoO 3 @CuO-0.2 developed in this study with core-shell structure has outstanding catalytic performance and excellent stability. The presence of Co 2+ proves the existence of oxygen vacancies on the surface of the catalyst, which is helpful for the reduction of Cu 2+ to copper and promotes the MSR reaction.
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Jia Wen,Rong Jiang,Junyuan Huang,Yuan Xie,Le Ma,Xinyu Li,Yang Ren,Zhu Liu,Bowen Xiao,Xiaowei Zhou
In this study, hollow and hierarchical CuO micro–nano cubes wrapped by reduced graphene oxide (H-CuO MNCs@rGO) were designed and successfully fabricated via a novel three-step wet-chemical method. Benefiting from its unique hollow and hierarchical micro–nano structures, H-CuO MNCs@rGO exhibited significantly enhanced electrochemical Na+ storage performance when utilized as anode material for sodium-ion batteries (SIBs). Specifically, H-CuO MNCs@rGO demonstrated a specific capacity of 380.9 mAh g–1 in the initial reversible cycle and a capacity retention of 218.9 mAh g–1 after 150 cycles at a current density of 300 mA g–1. Furthermore, through the dominant pseudocapacitive behavior, an optimized rate capability of 221.2 mAh g–1 at 800 mA g–1 can be obtained for H-CuO MNCs@rGO. The comprehensive Na+ storage properties of H-CuO MNCs@rGO obviously exceeded those of hollow CuO cubes (H-CuO MNCs) and bulk CuO anodes. Such enhanced Na+ storage performances of H-CuO MNCs@rGO can be attributed to its reasonable hollow and hierarchical micro–nano structures, which provide abundant redox active sites, shorten Na+ migration pathway, buffer volume expansion, and improve electronic/ionic conductivity during sodiation/desodiation process. Our strategy provides a facile and innovative approach for the design of CuO with rational micro–nano structure as a high-performance anode for SIBs, which would also be a guiding way for tailoring transition metal oxides in other scalable and functional applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2023
·Vol. 16
·期 5
·731-741
·
IF 3.1
Liyuan Yu,Mengxiao Lv,Ting Zhang,Qixin Zhou,Juanhua Zhang,Xuexiang Weng,Yongming Ruan,Jiuju Feng
Herein, we present a simple and mild method to in situ prepare CuO nanostructures for non-enzymatic glucose sensing. A Cu-metal organic framework (Cu-MOF) precursor was first directly grown on a pencil lead electrode with 3D graphene-like surfaces (EPLE) and then in situ transformed into CuO nanorods. The CuO nanorod-modified EPLE (CuO/EPLE) shows high sensitivity (1138.32 μA mM−1 cm−2), fast response time (1.5 s) and low detection limit (0.11 μM) for glucose oxidation. It has been found that NaOH promoted the generation of ˙OH groups and Cu(III) on the CuO surface, which then facilitated the electrochemical oxidation of glucose. Signals characteristic of hydroxyl and carbon-centered radical adducts were detected by EPR. Furthermore, the CuO/EPLE sensor also shows good accuracy in glucose determination in human serum samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2021
·
IF 3.383
Zhiliang Guo,Qingchun Zhang,Huiyu Liu,Hewen Zhang,Jinhao Zhang,Jin Zuo,Bo Jin,Rufang Peng
A novel metal-organic framework (MOF) precursor strategy to fabricate CuO microspheres via air-flow impacting (AFI) synthetic method was reprted in the work. The MOF precursor HKUST-1 and its derived CuO microspheres were characterized by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM). In addition, the catalytic activity of CuO microspheres on the thermal decomposition of ammonium perchlorate (AP) was investigated by differential thermal analysis (DTA). The results of DTA indicated that the addition of CuO microspheres to AP observably reduces the decomposition temperature due to its high contact area and much catalytic active sites. The HKUST-1 derived CuO microspheres are expected to remarkably improve the catalytic performance in AP-based composite solid rocket propellants.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2020
·
IF 2.726
Longlong Geng,Zhihui Lin,Zhaojun Li,Su An,Xiuling Zhang,Zhongmin Liu,Da-Shuai Zhang,Yong-Zheng Zhang,Shuang Gao,Haixiang Han
Rational engineering the structural and superficial characters of catalysts to tailor their properties is a pursuit for the catalyst design . In this work, via an ultrasonic-assisted H 2 O 2 etching strategy, a kind of copper oxide catalyst (CuO-60) with a holey lamellar structure was prepared and structurally characterized by a series of characterization techniques including SEM, HRTEM , XRD , N 2 adsorption, XPS and H 2 -TPR. Interestingly, this strategy can not only generate defect rich surface but also achieve morphology reconstruction, thereby affording high-density active sites on CuO-60. As a low-cost catalyst, CuO-60 displays exceptional high catalytic activity and stability for the hydrogenation of 4-nitrophenol (4-NP) under mild conditions (25 °C and 1 atm). The 4-NP conversion over CuO-60 reaches up to 99% within 12 min, which is nearly 43-fold faster than that of the pristine CuO control. The correlation between the microstructure of the catalyst and the enhanced catalytic performance was well established. The outstanding catalytic properties can be ascribed to the synergistic effects of structure porousness, which renders in more exposed active sites, and unique redox behavior of electropositive Cu sites during catalytic process. Additionally, a catalytic mechanism is also proposed and rationalized.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）