NANOTECHNOLOGY
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2018
·Vol. 29
·期 43
·435704
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IF 3.404
Yangxiu Liu,Jin Jia,Yan Vivian Li,Jing Hao,Kai Pan
In recent years, Janus materials have become a research hotspot in the field of materials science; however, fabricating inorganic Janus-like nanofibers (NFs) is still a challenge. Herein, we report novel ZnO/NiO Janus-like NFs with efficient photocatalytic performance via an electrospinning method followed by calcination treatment. The morphology, structure, chemical composition and crystallinity of ZnO/NiO Janus-like NFs were studied in detail via SEM, TEM, HRTEM, EDS, FT-IR, XPS and XRD, indicating that the NFs had a perfect Janus-like structure composed of ZnO and NiO. A series of photocatalytic experiments were carried out in aqueous organic dye solutions under 365 nm UV radiation for 1 h, with the degradation rate of malachite green able to reach 96%, proving that the NFs have great potential in the field of organic dye degradation. Furthermore, a reasonable catalytic mechanism for the ZnO/NiO Janus-like NFs was proposed, which was discussed from the view of electron–hole pairs and p-n junctions. In short, the method in our work is expected to become a new way of effectively preparing functional inorganic Janus-like NFs.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Zhile Xiong,Yuewen Chen,Weidong Xie,Jiali Huang,Xiaoli Zhang,Xiya Zhang,Hai Liu
The electrocatalytic reduction of CO2 using renewable electricity offers a sustainable approach for the production of valuable chemicals. However, this process is often hindered by low catalytic activity and poor selectivity. In this study, we have developed a novel electrocatalyst that integrates ZIF-8-regulated ZnO interfaces, undercoordinated surface sites, and mesoporous nanostructures. This design enabled the ZnO/ZIF-8 catalyst to achieve excellent CO2 conversion performance, with a CO2 Faraday efficiency of more than 91% over the potential range of -1.0 V to -1.6 V and a high current density compared to reversible hydrogen electrodes. At the optimal potential of -1.4 V, the CO Faraday efficiency reaches 95.57%, accompanied by a current density of -8.16 mA/cm2. The porous nature and superior CO2 adsorption ability of the ZIF-8 shell layer foster an optimal setting for CO2 conversion while enhancing the exposure of active sites. Additionally, the synergistic coupling of ZnO and ZIF-8 interfaces fine-tunes the electronic structure of the active sites, thereby enhancing CO2RR efficiency.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
Catalysts
·
2021
·Vol. 11
·期 8
·934
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IF 4.146
Yong Cheng,Xiuxiu Wang,Yu Mei,Dan Wang,Changchun Ji
Considering the photocatalytic performance of CDs, ZnO, and the unique porous nanostructure and stability of ZIF-8, we prepared ZnCDs/ZnO@ZIF-8 zeolite composites. The resultant material represented an enhanced ability for the photodegradation of TC compared with that of ZnCDs and ZnO. The photocatalytic degradation efficiency reached over 85%. The catalytic activity of the composites was maintained after four cycles. The experimental result indicated that ⋅O2radical was the active species in the reaction.Keywords:carbon dots;zeolite composites;photocatalytic;tetracycline
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
高影响因子
Materials
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2021
·Vol. 14
·期 21
·6474
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IF 3.623
Huan Shuai,Jiao Wang,Xianguang Wang,Gaoxiang Du
Herein, using black talc as a carrier, a ternary black talc-TiO2/ZnO composite photocatalyst was prepared by the sol-gel method, and the effect of the black talc on the hetero-structure properties of the TiO2and ZnO was systematically studied. The prepared composite photocatalyst showed an excellent degradation performance of the pollutant, where black talc plays an important role in promoting the interface interaction by enhancing the contact area between the TiO2and ZnO. Moreover, the free carbon element doping in black talc favors the formation of more oxygen vacancies, thereby improving the response as a photocatalyst in visible light. In addition, the carbon in the black talc can also adsorb organic pollutants and enrich the surroundings of the photocatalyst with pollutants, so it further improves the catalytic efficiency of the photocatalyst. Under UV irradiation, the degradation rate of Rhodamine B on black talc-TiO2/ZnO was found 3.3 times higher than that of black talc-TiO2with good stability.Keywords:black talc carrier;heterostructure;photocatalyst;TiO2;ZnO
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 12
·1028
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IF 4.4
Haowei Lin,Shibo Xing,Ao Jiang,Mingxuan Li,Qing Chen,Zhenling Wang,Lei Jiang,Huiying Li,Jie Wang,Chenchen Zhou
Large-area oriented ZnO nanoarrays (including nanowire, nanorod, and nanotube) on ITO glass substrates are synthesized via the simple hydrothermal, electrodeposition, and electrochemical etching approach. The morphology of ZnO nanoarrays is controlled by adjusting the reaction temperature, reaction time, and current density. The scanning and transmission electron microscopy (SEM and TEM) results indicate the successful preparation of large-area oriented ZnO nanoarrays with different types, and the energy-dispersive X-microanalysis spectrum (EDS) and X-ray diffraction (XRD) results confirm that the composition of the obtained nanoarrays is ZnO. More importantly, the as-prepared ZnO nanotube arrays are observed with about a 40% increase in ultraviolet absorption intensity compared to the ZnO nanowire/nanorod arrays, due to having larger specific surface areas. The as-prepared different types of ZnO nanoarrays have great potential for applications in low-cost and high-performance optoelectronic devices.
研究领域:
材料科学
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纳米技术
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光电材料
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2014
·Vol. 132
·期 11
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IF 1.64
Jianing Li,Zhiqiang Cheng,Mengzhu Liu,Mingyue Zhang,Meijuan Hu,Li Zhang,Haifeng Jiang,Junfeng Li
A simple and efficient procedure has been developed to fabricate ZnO nanofibers with dendritic structure via electrospinning and subsequent calcination. The spinning solution is prepared by mixing polyvinylpyrrolidone (PVP) and zinc acetate into methanol. From SEM images, it can be observed that the ZnO product has a tendency of dendritic structure. The diameter of the dendritic branch is ∼137 nm. The structure and physicochemical property of the prepared nanofibers are elucidated by TGA, SEM, XRD, FTIR, and PL, respectively. The photoluminescene measurement of the ZnO samples exhibit a broad visible emission band concentrate on around 430–580 nm. Meanwhile, the intensity is related to the content of surface oxygen vacancies, which probably influence photocatalytic activity of ZnO samples. Whereafter, the photocatalytical activity of the ZnO nanofibers is evaluated by quantifying the degradation of methyl blue. The result indicates that ZnO nanofibers annealed at 650°C show an excellent photocatalytic activity. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41627.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2019
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IF 3.42
Juan Liao,Daiyong Ye
To investigate a novel method for ZnO nanoparticles (NPs) photoinitiators to better combine in photo-cured coatings, ZnO NPs were photo-grafted onto the macromolecular chains of the photo-curing films. The modified ZnO NPs (ZnO-TDI-1173 NPs) were prepared by the surface-reaction of ZnO NPs with 2-hydroxy-2-methylpropiophenone (Darocur 1173), which was confirmed by Fourier transform infrared spectroscopy, energy dispersive spectroscopy, scanning electron microscopy and X-ray diffraction, etc . Due to the relatively better hydrophobicity and compatibility of ZnO-TDI-1173 NPs in the photo-curable oligomer matrix than these of ZnO NPs, the fractured surface SEM images showed fewer agglomerates. As for the film properties of ZnO-TDI-1173 NPs/WPUA, the pencil hardness grade was H while that of pure WPUA was B; the value of gel ratio increased by 9.51% and the tensile strength (13.28±0.2 MPa) was about five times than that of pure WPUA (2.45±0.4 MPa). TGA data showed that the weight percentage of residuals at 600 °C was the highest among the four films. It implied that the covalent forces that ZnO-TDI-1173 NPs were in conjunction with WPUA matrix after photo-curing, and had relatively better thermal stability as well as mechanical properties in comparison to pure WPUA and ZnO NPs/WPUA films. Besides, the antibacterial investigation testified the antibacterial function of ZnO NPs/WPUA and ZnO-TDI-1173 NPs/WPUA. Therefore, ZnO-TDI-1173 NPs possessed a photo-grafting feature mechanism, with which functioned as both photoinitiators and nano-fillers. This paper demonstrated that the photolysis of ZnO-TDI-1173 NPs was a novel successful method to be grafted on the photo-cured films.
研究领域:
材料科学
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化学工程
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生物医学工程
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DOI
高影响因子
Journal of Materials Chemistry A
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2014
·Vol. 2
·期 39
·16740-16745
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IF 0
Xuhai Li,Liang Xu,Lixin Liu,Yuan Wang,Xiuxia Cao,Yuanjie Huang,Chuanmin Meng,Zhigang Wang
ZnO ceramics with giant dielectric constants have been synthesized via a high pressure treating method. SEM results reveal that the ceramics using high pressure treated powders are porous, and the dielectric constant of the specimens first increases and then decreases with increasing density. Ceramics sintered at 1050 °C possess the optimal giant room temperature dielectric constants (∼1.8 × 104 at 100 Hz) with low relative density and dielectric loss. The improved dielectric constant can be attributed to enhanced Maxwell–Wagner poly-dispersive relaxation due to the high pressure treating process, which makes ZnO porous ceramics a potential material for high dielectric constant applications. This approach is generic and provides a new avenue to obtain porous ceramics with excellent dielectric properties.
研究领域:
材料科学
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电子材料
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DOI
CATALYSIS TODAY
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2018
·
IF 4.667
Bao-Shun Wang,Ren-Ying Li,Zhi-Yun Zhang,Xing-Wang,Xiao-Ling Wu,Guo-An Cheng,Rui-Ting Zheng
In this paper, we fabricate a novel ZnO nanowires overlapping junction (ZnO NWS-OLJ) electrode via a facile and cheap solution chemical routine. ZnO nanowires overlap and touch each other during their growth, and form ZnO NWS-OLJ. The photoelectrochemical (PEC) examination indicate that the photocurrent density of the as-prepared ZnO NWS-OLJ electrode reaches 57 μA cm −2 , which is 2 times higher than that of the ZnO nanorods (ZnO NRD) vertical array electrode at a 0 V bias potential versus Ag/AgCl. The PEC performance of ZnO NWS-OLJ electrode could be further improved by decorating Au nanoparticles on ZnO NWS-OLJ.
研究领域:
材料科学
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能源科学
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纳米技术
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
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2017
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IF 4.339
Xinlei Wang,Kui Ma,Lihong Guo,Ye Tian,Qingpeng Cheng,Xueqin Bai,Jingjing Huang,Tong Ding,Xingang Li
Herein, we reduced the ZnO-modified copper phyllosilicate to synthesize a series of Cu/ZnO/SiO 2 catalysts ( x CuZn/SiO 2 ) which were mixed with γ-Al 2 O 3 for dimethyl ether steam reforming (DME SR). The structure and the formation of copper phyllosilicate were systematically characterized by nitrogen adsorption, XRD and IR. The novel synthetic route led to the remarkably high dispersion of copper species and adjustable Cu 0 /Cu + ratio on the catalyst surface, resulting in the superior catalytic performance for DME SR. The amount of Cu 0 and Cu + sites on the catalyst surface was dramatically affected by ZnO loading, and the turnover frequency results indicated that the 4CuZn/SiO 2 catalyst (Cu/Zn = 4) with the Cu 0 /Cu + ratio of 1 showed the highest catalytic performance. The XPS, H 2 -TPR and TEM results revealed the existence of strong interaction between Cu species and ZnO on the reduced 4CuZn/SiO 2 catalyst, which suppressed the reverse water-gas reaction and prevented the sintering of copper.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 3
·期 2
·600-607
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IF 0
Hanxing Chen,Ming Wen,Zaidi Huang,Qingsheng Wu,Jiali Liu,Teng Tu
Highly active Cu@ZnO brush-like nanostructures have been successfully synthesized through the heteroepitaxial growth process of ZnO branched nanorods (NRs) based on Cu core nanowires (NWs), and used for the evaluation of selective catalytic degradation for polycyclic aromatic compounds. The resultant Cu@ZnO nanobrushes, with the main diameter of ∼500 nm, consist of Cu core NWs with diameter of ∼50 nm and outer ZnO branch NRs shells with thickness of ∼250 nm. The as-designed Cu@ZnO nanobrushes exhibit high performance for the selective catalytic degradation of polycyclic aromatic compounds. Nearly 90% conversion with the reaction rate constant (k) of 0.012 min−1 can be achieved for anthracene, while only about 50% and 10% conversions are shown for phenanthrene and naphthalene, respectively. Besides the highly efficient transportation of electrons, Cu NWs have strong capacity for oxygen activation which results in the gathering of negative charges and rich chemisorbed oxygen onto the surface, which is responsible for the high catalytic efficiency of Cu@ZnO nanobrushes toward the selective degradation of anthracene.
研究领域:
材料科学
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环境科学
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产品关联
DOI
CERAMICS INTERNATIONAL
·
2022
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IF 5.532
Yan Ziyang,Wu Angxuan,Wang Xilin,Huang Rongxia,Yan Nianping,Jia Zhidong,Wang Liming
In this paper, ZnO was used as a sintering aid as well as reactant in the reactive flash sintering (RFS) of zinc-containing ceramic materials at room temperature (25 °C). The RFS of ZnO-based ceramics, both ZnAl 2 O 4 and Zn 2 TiO 4 , were achieved with the application of a high electric field. Contrary to previous reports, the RFS of ZnAl 2 O 4 was divided into two stages according to temperature changes, and the effect of the reaction exotherm on the RFS was presented for the first time in this paper. In addition, the RFS produced a larger grain size of ZnAl 2 O 4 than conventional sintering did.
研究领域:
材料科学
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陶瓷工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）