Nanotechnology Reviews
·
2021
·Vol. 10
·期 1
·847-856
·
IF 7.848
Xiaowen Su,Zehua Wang,Yuan Huang,Zhenyu Miao,Shuhua Wang,Jianjun Wang,Xiao Li Zhang,Xiaomin Sun,Hong Liu,Yuanhua Sang
The hazard-free treatment of Cr( vi ) ions is critical in modern industry. Photocatalytic reduction and detoxification are high-potential strategies. Photocatalysts with high efficiency, low cost, environmental friendliness, and easy mass products are required. In this study, we report a facile strategy using triethanolamine (TEOA) as a capping ligand to modify the surface of ZnO nanospheres. The experimental and theoretical results reveal that the presence of TEOA on the surface was beneficial for electron enrichment on Zn and hole transfer to TEOA and can photocatalytically reduce Cr( vi ) by almost 100% in 5 min. The photocatalytic property of TEOA-modified ZnO could be renewed by the reabsorption of TEOA in solution. The great sedimental properties benefit photocatalyst recycling and renewal, which also provides high potential for water pollution and environmental emergency responses applications.
研究领域:
环境科学
·
材料科学
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化学工程
·
纳米技术
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
·
IF 7.46
Rui Gao,Lang Gao,Xianfa Zhang,Shan Gao,Yingming Xu,Xiaoli Cheng,Ghuanyu Guo,Qinghua Ye,Xin Zhou,Zoltán Major,Lihua Huo
ZnO@the reduced graphene oxide (rGO) nanorod arrays were grown in-situ on the ceramic tube substrate by one-step hydrothermal without any template or surfactant. The reduced graphene oxide was evenly coated around the ZnO nanorods through the controllable assembly of the rGO and ZnO heterojunction interface. rGO contributed to the improvement of material conductivity and provided more active sites to adsorb NO 2 molecules. The combination of rGO and ZnO significantly enhanced the response of the composite to NO 2 at room temperature . It showed an excellent selectivity to NO 2 and a good linear relationship in the concentration range of 0.1∼10 ppm. In order to explore the response mechanism of ZnO@rGO composite to NO 2 , the change of element composition and status was performed by XPS technology before and after the exposure of the composite to NO 2 . The gaseous products after the reaction were also tested by GC–MS technology. DFT calculations were performed based on the test results, which demonstrated that the p-n heterostructure produced by the ZnO@rGO composite had a beneficial effect on improving the gas response capability.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2016
·Vol. 6
·期 17
·6513-6524
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IF 5.287
Ziyang Lu,Xiaoxu Zhao,Zhi Zhu,Minshan Song,Nailing Gao,Youshan Wang,Zhongfei Ma,Weidong Shi,Yongsheng Yan,Hongjun Dong
A novel hollow capsule-like recyclable functional ZnO/C/Fe3O4 was synthesized by employing the convenient and mild sol–gel method combined with the surface imprinting technique, which possessed good light response ability, superior magnetic separation performance and excellent reproducibility. This as-prepared functional ZnO/C/Fe3O4 was proved to not only exhibit high photocatalytic activity but also possess a strong three-dimensional oriented ability to selectively recognize and photodegrade danofloxacin mesylate. Through getting insight into the mechanism, we can confirm that in this photocatalytic reaction, h+ and ˙OH play major roles compared with ˙O2−. This work not only puts forward a novel design idea of functional semiconductor materials but also is expected to be widely applied to the oriented recognition and removal of a target substance according to the practical requirement.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Tingting Yu,Qingsong Liu,Guang Chen,Lifen Liu,Jinlong Zhang,Changfei Gao,Tao Yang
A novel heterostructure of g-C 3 N 4 /ZnO/Bi 4 O 5 Br 2 (ZB-3) was designed, and used in the microbial coupled photocatalytic fuel cell (MPFC). It can effectively improve electron utilization efficiency and pollutant degradation using this double Z-scheme heterojunction structure . The current–time ( I – t ) curves demonstrated that the current density of ZB-3 was higher than that of ZnO, ZnO/Bi 4 O 5 Br 2 (ZB-1), g-C 3 N 4 /ZnO (ZB-2). Electrochemical impedance spectroscopy (EIS) indicated ZB-3 possessed the minimum charge-transfer resistance. This MPFC for degrading rhodamine B (RhB) and tetracycline (TC) under different conditions were developed using these materials. Even in the dark condition, MPFC with g-C 3 N 4 /ZnO/Bi 4 O 5 Br 2 demonstrated 93% and 82% degradation efficiency for RhB and TC, respectively. Furthermore, the electron transport mechanism of the MPFC and ZB-3 were proposed. It paves the approach for more efficient pollutant degradation via MFC photocatalysis .
研究领域:
环境科学
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能源材料
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电化学
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光催化
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水处理技术
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DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 38
·22848-22855
·
IF 3.119
Yunxia Jin,Shimin Wang,Jia Li,Sheng Qu,Liufang Yang,Junming Guo
Due to the limited utilization of electrode materials, the rational design and facile synthesis of composite structures are still challenging issues for lithium-ion batteries (LIBs). Herein, a simple approach has been developed to prepare multiple core–shell structures of ZnO nanoparticles (NPs) encapsulated in hollow amorphous carbon (AC) shells. The as-synthesized ZnO@AC composites showed a uniform dispersion of ZnO NPs, compliant buffer AC shells, and nanoscale void spaces between the ZnO NP cores and AC shells. As a result of their structural merits, the ZnO@AC composites were evaluated as anode materials for LIBs and delivered enhanced coulombic efficiency, high reversible capacity, high rate capability, and improved cycling stability.
研究领域:
材料科学
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电化学
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纳米技术
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能源存储
✓ 已验证
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2021
·Vol. 2022
·期 4
·e202100944
·
IF 2.524
Yichang Lin,Sheng Liu
Graphical Photocathodic protection is promising to harvest solar light for corrosion protection of metals. Benefiting from a considerably enhanced absorption for visible light and a significantly increased transfer efficiency for photogenerated charges, the as-prepared ZnO/ZnSe/CdSe photoanode exhibits a superior photocathodic protection performance for the coupled 304 stainless steel under illumination. Photocathodic protection technology is emerging to harvest solar light for electrochemical corrosion protection of metals. Herein, ZnO/ZnSe/CdSe heterostructured nanowire arrays were synthesized on conductive glass substrates by a two-step ion-exchange reaction in ZnO nanowire arrays. The as-prepared ZnO/ZnSe/CdSe core/shell nanostructure was unveiled by XRD, SEM, TEM, EDAX elemental mapping, and XPS analyses. The ZnO/ZnSe/CdSe ternary heterojunction photoanode exhibits a considerably enhanced absorption for visible light and a significantly increased separation, transfer, and collection efficiencies for photogenerated charges. When working as photoanodes, the as-deigned ZnO/ZnSe/CdSe heterostructured nanowire arrays demonstrates a superior photocathodic protection performance for the coupled 304 stainless steel under illumination with AM 1.5G.
研究领域:
材料科学
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纳米技术
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电化学
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腐蚀防护
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可再生能源
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Yaling Wang,Lingpeng Yan,Guoqi Ji,Cheng Wang,Huimin Gu,Qun Luo,Qi Chen,Liwei Chen,Yongzhen Yang,Chang-Qi Ma,Xuguang Liu
Zinc oxide (ZnO) is one of the most extensively used electron-transporting layers (ETLs) in organic solar cells. However, owing to numerous surface defects and mismatched energy bands with the photoactive layer, light-soaking process is usually required to achieve a high device performance for the ZnO-based cells. Herein, we reported the synthesis of N,S-doped carbon quantum dots (N,S-CQDs) by a simple hydrothermal treatment using ascorbic acid and ammonium persulfate as reagents. As characterized by high-resolution transmission electron microscopy and X-ray diffraction, the synthesized CQDs were found to be 2–7 nm in dimensions, having a graphite-structured core and amorphous carbon on the shell. Fourier transform infrared and X-ray photoelectron spectroscopy analyses confirmed that these CQDs are highly nitrogen- and sulfur-doped, which leads to efficient (with a quantum yield of 33%) downconversion and excitation-dependent photoluminescence character. Application of these N,S-CQDs as surface modifier for ZnO layer in inverted organic solar cells was investigated. Results indicate that the cells with N,S-CQDs-decorated ZnO ETL showed higher power conversion efficiency without S-shaped kink in the current density–voltage curves. The performance improvement and the elimination of light-soaking effect for ZnO:N,S-CQDs cells are attributed to the ZnO surface defect passivation by N,S-CQDs, as confirmed by fluorescence spectroscopy and scanning Kelvin probe microscopy. The cells with N,S-CQDs-modified ZnO ETL showed a high power conversion efficiency of 9.31%, which is higher than the reference ZnO cells. The current work provides a feasible way to achieve shell element-doped CQDs for specific application in organic electronic devices.
研究领域:
材料科学
·
光电化学
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纳米技术
✓ 已验证
DOI
高影响因子
CATALYSIS TODAY
·
2022
·
IF 6.562
Xiaowen Su,Shan Wu,Xiaoxing Long,Yan Shi,Qi Pan,Jixin Su
Preventing climate change and achieving carbon neutralization depend on strengthening the carbon cycle in industry and limiting carbon emissions to ambient air. Our aim is to reduce CO 2 to valuable CO by gas-solid photo-catalytic reduction under sunlight. We prepared catalysts by one-step synthesis with graphene oxide (GO) and ZnO, surface modified with a monolayer of sulfonated cobalt phthalocyanine (CoPcS), which were calcined to obtain photocatalyst samples containing Co(II), ZnO and reduced graphene oxide (rGO). Results of TEM, SEM-EDS, XRD, XPS, PL and ESR revealed that the photocatalyst samples possessed a hybrid layer microstructure, heterojunction, and excellent electron-hole pair separation. Evaluation of the photocatalytic reduction reactivity showed that CO selectivity reached 96.2–99.0% and top CO yield was 26.15 µmol.g −1 .h −1 .
研究领域:
环境科学
·
材料科学
·
化学工程
·
光化学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2015
·Vol. 7
·期 7
·1319-1325
·
IF 2.598
Xiang Di,Lin Huiming,Ma Jie,Chen Xiang,Jiang Jingjie,Qu Fengyu
In order to enrich the variety of zinc oxide (ZnO), well-defined porous ZnO hollow microspheres (PZHM) by a mass of nanoparticles were successfully synthesized through a simple solvothermal method. Zinc acetate and 1,2-propylene glycol was used as zinc source and solvent respectively
to fabricate PZHM without the assistance of any surfactant. Upon changing the amount of zinc acetate and 1,2-propylene glycol, the morphology of the samples could be adjusted. PZHM, with 1–2 μm in diameter and 200–300 nm in wall thickness, were found to be composed of
nanoparticles that assembles to form the large surface area and highly porous samples. Gas sensing performances of the ZnO hollow spheres have been investigated, showing high sensitivity (S = 180 at 1000 ppm), low detection limit (1 ppm), fast response/recovery (8/9 s), and very good
selectivity.
研究领域:
材料科学
·
纳米技术
·
化学传感器
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Lin Wang,Jing Han,Yijiang Wu,Yaping Zhang,Qiang Zhang,Xuejiao Tan,Yingzi Yang,Weibing Li,Yuyu Bu,Jin-Ping Ao
In this paper, a ZnSe layer was formed by in-situ conversion on the surface of ZnO nanorod array, and then CdSe layer was transformed from the ZnSe layer by ion exchange method. Subsequently, a p-type poly 3,4-ethylenedioxythiophene (PEDOT) ultrathin conductive layer was deposited on the surface of CdSe by multi-current step deposition method. The separation and transmission processes of the photogenerated carriers were studied by analyzing the results of electrochemical impedance spectroscopy (EIS) and intensity modulated photocurrent/photovoltage spectroscopy (CIMPS/CIMVS). The in-situ growth method could reduce the interface barrier between ZnO and CdSe and optimize the interface exchange process of the photogenerated charge carriers. Meanwhile, the p-n junction constructed between PEDOT and CdSe layer could improve the separation efficiency of the photogenerated charge carriers. Therefore, PEDOT layer significantly promote the photoelectrochemical performance by passivating the surface state of CdSe and suppressing the secondary recombination of the photogenerated charge carriers.
研究领域:
材料科学
·
光电化学
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纳米技术
·
电化学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Candi Liu,Nan Zhang,Xin Huang,Qiwen Wang,Xiaohong Wang,Shengtian Wang
A novel two-dimensional ZnO-MoO 3 -C nanocomposite was synthesized by the green thermal calcination method with the biochar of mushroom derived carbon nanosheets and Zn 1.5 PMo 12 O 40 polyoxometallate. The nanocomposite was used to modify a glassy carbon electrode (GCE) for the first time to construct an acetaminophen (AP) electrochemical biosensor. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and nitrogen adsorption/desorption isotherm (BET) results showed that the synthesized ZnO-MoO 3 -C nanocomposite has many layered nanostructure and a large surface area. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) indicated that ZnO-MoO 3 -C/GCE presented highly effective and accurate toward the oxidation of AP due to the stable molecular structure of the electrode surface. The DPV response of the proposed sensor exhibited selectively and sensitively determination for AP with a wider linear dependence on the concentration of AP from 2.5 to 2000 μM, and lower limits of detection (LOD) 1.14 μM, compared with other carbon-base material modified GCE and GCE electrodes. In addition, the proposed sensor was applied to detection of AP in real samples, and the recovery was the range from 94.7 to 101.0%, and RSD was less than 5%. It indicates that the proposed sensor has a hopeful capacity of extensive applications in bioanalysis and tablets.
研究领域:
材料科学
·
分析化学
·
生物医学工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 8
·10734-10749
·
IF 2.478
Kabir Fazal,Murtaza Adil,Saeed Azhar,Ghani Awais,Ali Anwar,Khan Saleh,Kaili Li,Qizhong Zhao,Kang Yao Kang,Yang Sen
Room temperature ferromagnetism with the doping of magnetic ions in the semiconducting host is the fundamental criterion for the potential use of spintronics material. In the present study, pure and (Fe, Tb) co-doped ZnO nanoparticles were well-prepared via the co-precipitation method, and corresponding microstructural, magnetic, and optical properties were investigated. The formation of Wurtzite hexagonal crystal structure of pure and doped ZnO was confirmed by X-ray diffraction (XRD) studies. No secondary phase was detected in all samples. Microstructural analysis reveals the spherical morphology of synthesized particles with the average size in the nanometer range. Fourier transforms infrared spectra show Tb–Zn–O stretching at 550 cm −1 . Optical absorption spectra show that the bandgap decreases and the absorption band slightly shift toward the visible region with increasing Tb doping, which may be due to the transfer of charge between the Tb ion 4f level and ZnO valance band. The photoluminescence (PL) spectrum exhibits a strong emission in the visible range, and PL emission intensity decreases with increasing Tb concentration and is anticipated to be due to the low recombination rate of electron–hole pairs. Most importantly, the room temperature ferromagnetism (RTFM) was observed in the doped ZnO nanoparticles, ascribed to the bound magnetic polaron (BMP) mechanism. The optical and magnetic outcome demonstrates that prepared (Fe, Tb) co-doped ZnO based dilute magnetic semiconducting (DMS) material are potential candidates for spintronics applications.
研究领域:
材料科学
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纳米技术
·
自旋电子学
·
固体物理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）