CATALYSIS TODAY
·
2015
·
IF 3.893
Jun Fu,Dezhang Ren,Lu Li,Yunjie Liu,Fangming Jin,Zhibao Huo
An efficient conversion of dimethyl phthalate (DMP) to phthalide (PHT) over CuO in aqueous media was investigated. Among the catalysts we tested, various metals or metal oxides were effective for the conversion of DMP to PHT in water, and CuO showed excellent catalytic activity and gave the best result. The PHT yield of 85% was achieved when Zn acted as a reductant. Mechanism study for the conversion of DMP suggested that an intermediate 2-hydroxymethyl benzoic acid was produced in the process. The present study provides a useful route for the production of PHT from DMP.
研究领域:
化学工程
·
催化科学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Ying Xu,Jiaxiang Ma,Yu Han,Jingjing Zhang,Fuyi Cui,Ying Zhao,Xin Li,Wei Wang
Pure water production by solar distillation under no light concentration is attracting ever greater attention in the rural area with electricity limit due to its constant energy input. Meanwhile, the polluted raw water in these areas also lacks effective decontamination treatment. Rather than relying on external steps for decontamination process, photothermal materials with pollutant removal ability would have better water cleaning performance. Here, we designed a multifunctional photothermal material based on a copper mesh with abundant CuO nanowires. This CuO nanowire mesh exhibited a high solar absorption of 93% and superhydrophilicity for water transport, contributing to a high solar vapor efficiency of 84.4% under one-sun illumination. Besides, the CuO nanowires possessed a great catalytic ability for the degradation of contaminants in raw water. Moreover, the diffusion inhibition test showed a clear antimicrobial effect of the CuO nanowire mesh on the bacteria. Hence, the as-prepared multifunctional CuO nanowire mesh allows for the incorporation of solar evaporation, pollutant degradation, and antibacterial action, which holds great application potential in the pure water production in solar distillation.
研究领域:
材料科学
·
环境科学
·
光热转换
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 61
·38486-38494
·
IF 3.361
Jun-Hao Zhou,Chen-Yue Yuan,Ya-Li Zheng,Hai-Jing Yin,Kun Yuan,Xiao-Chen Sun,Ya-Wen Zhang
Tandem catalysis, in which a CO2-to-C2 process is divided into a CO2-to-CO/*CO step and a CO/*CO-to-C2 step, is promising for enhancing the C2 product selectivity when using Cu-based electrochemical CO2 reduction catalysts. In this work, a nanoporous hollow Au/CuO–CuO tandem catalyst was used for catalyzing the eCO2RR, which exhibited a C2 product FE of 52.8% at −1.0 V vs. RHE and a C2 product partial current density of 78.77 mA cm−2 at −1.5 V vs. RHE. In addition, the C2 product FE stably remained at over 40% over a wide potential range, from −1.0 V to −1.5 V. This superior performance was attributed to good matching in terms of the optimal working potential and charge-transfer resistance between CO/*CO-production sites (Au/CuO) and CO/*CO-reduction sites (CuO). This site pair matching effect ensured sufficient supplies of CO/*CO and electrons at CuO sites at the working potentials, thus dramatically enhancing the formation rate of C2 products.
研究领域:
电化学
·
催化
·
材料科学
·
能量转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
VACUUM
·
2018
·
IF 2.067
Yinghui Hu,Shimin Yang,Bowen Tao,Xiaolong Liu,Kaifeng Lin,Yulin Yang,Ruiqing Fan,Debin Xia,Dongyu Hao
Hollow mesoporous CuO microspheres (CuO-HM) have been prepared by a hard-template method and their structure properties as well as catalytic performance in ammonium perchlorate (AP) decomposition were fully investigated by XRD , SEM , XPS , TG/DSC and TG/F-TIR methods. The results indicated that CuO-HM could be described as CuO micro-sized spheres composed of self-assembled nanoparticles , possessing hollow and mesoporous structure. Compared with CuO nanoparticles and CuO microspheres, CuO-HM has significantly improved catalytic efficiency in AP decomposition due to large surface area, easily accessible porous and hollow structure. Typically, CuO-HM could decrease the AP decomposition temperature by 105.7 °C and enhance the heat production by 735 J/g. TG/FT-IR results indicated that CuO-HM accelerated the thermal decomposition of AP mainly at the high temperature decomposition stage with the releasing of N 2 O, NO, NH 3 , H 2 O, HCl, O 2 et al. This study demonstrated that hollow and mesoporous CuO was a promising catalyst for the application in solid fuel rockets propellants .
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2021
·Vol. 10
·期 5
·055018
·
IF 2.07
Mingxing Xiao,Rajesh Pathak,Dongping Zheng,Yuanyuan Jiang,Yingjie Zhang,Kaiwen Wei,Fan Wu
In this paper, two different nanostructures of CuO seeds layer and CuO nanocones array as photocathode were introduced for TiO2/Sb2S3 heterojunction to study the photoelectrochemical properties. The all-solid FTO/TiO2/Sb2S3/CuO seeds layer/FTO device and FTO/TiO2/Sb2S3/CuO nanocones array/FTO device could realize photoelectric conversion with a small photocurrent and photovoltage, and the photoelectrochemical properties of FTO/TiO2/Sb2S3/CuO nanocones array/FTO is even lower than that of the FTO/TiO2/Sb2S3/CuO seeds layer/FTO device due to the limited contact area between Sb2S3 and CuO nanocones. When the electrolyte I3−/I− was filled into space between Sb2S3 and CuO seeds (nanocones array) photocathode, the photoelectrochemical performance was significantly improved, especially, the photocurrent is enhanced by two (four) orders of magnitude and the photovoltage is enhanced by two orders of magnitude than the device for both photocathodes without electrolyte. For better understanding the photoelectrochemical mechanism of different CuO nanostructure photocathodes, dynamic characterization of intensity-modulated photocurrent/photovoltage spectroscopy and photoelectrochemical impedance spectroscopy were carried out to study photo-generated electron and hole behaviors. Results showed that charge transfer rate in device with CuO seeds layer photocathode is significantly enhanced by CuO nanocones array photocathode. The better hole transfer also improved the charge separation in Sb2S3 and reduced their recombination rate, which results in the enhanced photocurrent and photovoltage by CuO nanocones array photocathode.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Kai Yang,Renyuan Deng,Chaofeng Wang,Shuilin Wu,Zhenduo Cui,Yufeng Zheng,Zhaoyang Li,Hui Jiang,Shengli Zhu,Paul K. Chu,Xiangmei Liu
Pathogenic bacteria can spread rapidly from contaminated surfaces to human skin once humans touch such surfaces, resulting in contact infection and subsequent bacterial infectious diseases. In addition to the bacterial drug resistance induced by overuse of antibiotics, the commonly used antibiotic bacteria-killing strategy is unsuitable for surface sterilization of facilities. Herein, a heterojunction CuO/ZnO nanofilm was constructed on glass plates by calcination and atomic layer deposition. This film exhibited excellent photocatalytic antibacterial activity under visible light. The heterostructure between CuO and ZnO at the interface accelerated the separation of photogenerated electrons and holes, resulting in increased yield of reactive oxygen species, which effectively kill bacteria. After 5 min of simulated sunlight irradiation, the antibacterial efficiencies of CuO/ZnO against Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E. coli ) were 99.68 ± 0.31% and 96.49 ± 0.78%, respectively. The photocatalytic antimicrobial nanofilm synthesized in this study can potentially be used for rapid and safe disinfection of contact surfaces in public facilities.
研究领域:
材料科学
·
微生物学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 1
·104
·
IF 5.076
Hongyu Ma,Yaqi Tan,Zhifei Liu,Jianhong Wei,Rui Xiong
Photocatalytic hydrogen evolution is a promising “green chemistry” route driven by sunlight for the direct water splitting into value-added hydrogen energy. Herein, with the object of exploring the effect of CuO loading on W18O49photocatalytic activity, a 3D Urchin-like CuO modified W18O49(CuO/W18O49) microspheres with different CuO loadings were synthesized via thermochemical precipitation combined with solvent-thermal method. The obtained CuO/W18O49microspheres were analyzed by means of X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and photoluminescence (PL), etc. The results infer that the urchin-like 3D morphology with a high surface area and abundant 1D nanowires promotes electron transfer, the introduction of CuO further increases the number of active sites, thereby ensuring fast interfacial charge transfer to improve photocatalytic performance. During photocatalytic H2evolution from water splitting, 5 wt.% CuO/W18O49shows the optimal performance, the H2yield is almost 3.22 times that of the undoped counterparts. This work presents that oxygen-vacancy-rich heterojunction nanocomposites can be used as a new strategy to design materials with high photocatalytic activity.Keywords:photocatalysis;CuO modification;oxygen vacancy;W18O49microspheres;water splitting
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Xuliang Pang,Huaiquan Zhao,Yifei Huang,Youchao Liu,Hongye Bai,Weiqiang Fan,Weidong Shi
Achievement of the intrinsic activity by in situ electrochemical reconstruction has been becoming a great challenge for designing a catalyst. Herein, an effective electrochemical strategy is proposed to reconstruct the surface of the CF–CuO/CeO2 precursor. Under the stimulation of oxidative/reductive potential, abundant active sites were successfully generated on the surface of CF–CuO/CeO2. Remarkably, the implantation of oxygen vacancy-rich CeO2 synergistically optimizes the chemical composition and electronic structure of CF–CuO/CeO2, greatly promoting the generation of active species. Systematic electrochemical experiments indicate that the superior catalytic performance of reconstructed CF–CuO/CeO2 could be attributed to CuOOH/CeO2 and Cu2O/Ce2O3 active species, respectively. The oxidative-/reductive-activated CF–CuO/CeO2 was further employed in a paired cell for the synergistic catalysis of hydroxymethylfurfural oxidation with 4-nitrophenol hydrogenation. As a result, nearly 100% Faraday efficiency for furandicarboxylic acid/4-aminophenol production was achieved in the paired system (−0.9 V vs Ag/AgCl, 1.5 h). Therefore, the electrochemical reconstruction via oxidative/reductive activation has been confirmed as a feasible approach to significantly excite the intrinsic activity of a catalyst.
研究领域:
材料科学
·
电化学
·
催化反应
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2011
·
IF 3.65
Qin Hao,Houyi Ma,Zhicheng Ju,Guangda Li,Xiaowei Li,Liqiang Xu,Yitai Qian
LiCoO 2 nanoparticles were prepared through a sol–gel method, and then appropriate amount of CuO nanoparticles were deposited onto their surfaces to improve their cycling performances. It is found that the CuO coated sample has the capacity retention higher than 90% at the rates below 30 C after 10 cycles, which also has the highest capacities of 135 and 123 mAh g −1 at 40 C (5480 mA g −1 ) and 50 C (6850 mA g −1 ), respectively. The cyclic voltammograms result reveals that the CuO coating reduces the polarization and improves the electrochemical activity of cathode. In addition, experimental results indicate that CuO coating plays an important role in reducing the charge transfer resistance of the cell during cycling, which has been demonstrated by the electrochemistry impedance spectroscopy analysis. The above data indicate the potential application of CuO coated LiCoO 2 in high power field.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2019
·Vol. 21
·期 8
·1-12
·
IF 2.009
Lu Jiayu,Xu Yanyan,Liu Wei,Wu Zhaoliang,Li Na,Shu Ting
The recovery of nano-catalysts from organic wastewater is still one of the most significant problems in the catalytic industry. In this work, froth flotation was used to solve this problem. CuO nano-particles were considered as the desired materials. First, four surfactants were screened for determining a suitable collector through comparing their foam properties and capture capacity to CuO nano-particles. Subsequently, froth flotation was performed by using cocamidopropyl betaine (CAB) as the collector. Under the suitable operation conditions, the enrichment ratio and recovery percentage of CuO nano-particles reached as high as 20.52 and 91.50%, respectively. Finally, the size distribution and morphology of CuO nano-particles before and after froth flotation were characterized. Experimental results indicated that the dispersibility of the recovered CuO nano-particles after froth flotation was better than that of the commercial CuO nano-particles due to the existence of surfactant molecules around the nano-particle surface. This work is expected to provide a new insight into the effective recovery of nano-catalysts from the downstream industrial effluent and to facilitate the industrialization of froth flotation in the green catalytic industry.
研究领域:
化学工程
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Xingye Zeng,Cunhui Lin,Qinggang Ren,Shufeng Shan,Hanlu Wang
Developing a highly efficient catalyst is one of the important topics in the field of oxidative desulfurization from liquid fuels. In this study, the composite metal oxide catalysts (CuO-MgO) with co-catalyst MgMoO 4 were prepared by co-precipitation method with simple process, high efficiency and good performance and their structures characterized. An efficient extractive catalytic oxidative desulfurization (ECODS) system for liquid fuel was successfully developed on the basis of as-prepared CuO-MgO-MgMoO 4 (CuMgMo) as the catalyst, sodium hypochlorite (NaClO) as the oxidant, and acetonitrile as the extractant. Taking the n -decane and n -tetradecane containing dibenzothiophene (DBT) as the test model oil sample, the main parameters influencing desulfurization performance were examined in detail, such as the molybdenum content, the dosage of CuMgMo, the reaction temperature, the initial S-concentration, the different extractants, the volume ratio of extractant to oil, the different oxidants, and the molar ratio of NaClO to DBT . Based on optimized desulfurization reaction conditions, the model oil containing different sulfur compounds (benzothiophene, 4-methyldibenzothiophene, and 4,6-dimethyldibenzothiophene) and the real oil (straight-run gasoline, straight-run kerosene, and straight-run diesel) were further tested. Based on the free radical trapping experiments and the calculation of density functional theory, the reaction mechanism was deeply explored. The results showed that the de-electron reaction of DBT was mainly catalyzed by MgMoO 4 and the reaction of HClO obtaining electron was mainly catalyzed by CuO. MgMoO 4 plays an assisting role in improving the catalytic reaction rate. This work will provide a useful reference for the construction of efficient ECODS system using composite metal oxides.
研究领域:
化学工程
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Zihan Yin,Yang Zeng,Dongmei Yang,Yang Jiao,Jiaming Song,Peng Hu,Haibo Fan,Feng Teng
Combining ZnO materials and other narrow bandgap materials is an effective route to construct high performance optoelectronic devices. Herein, a multifunctional optoelectronic device based on CuO/ZnO p-n junction was prepared by growing ZnO nanorod arrays on CuO film. The obtained device not only can be used as self-powered photodetector in a wide spectral range, but also as a photo-induced binary response device. The obtained self-powered photodetector can operate in UV–vis–NIR region. The maximum responsivity of 1.24 μA∙W −1 , specific detectivity of 9.77 × 10 6 Jones, and response/recovery time of ∼20 ms were achieved at zero bias when the device was irradiated by 405 nm light (55 mW cm −2 ). The thickness of CuO film has significant influence on the performance of photodetectors. The built-in field at the interface of CuO and ZnO makes the device operate without any external power supply. The obtained device also exhibits a photo-induced binary response characteristic at a small forward bias, showing great application potential in light communication systems and optical chips.
研究领域:
材料科学
·
光学工程
·
半导体物理
✓ 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）