Crystals
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2021
·Vol. 11
·期 5
·522
·
IF 2.589
Xinying Yang,Jin Tian,Yang Guo,Mengyuan Teng,Haixia Liu,Tianduo Li,Pingli Lv,Xuping Wang
Zinc oxide (ZnO) possesses superior chemical and physical properties so that it can occupy an essential position in the application of nanostructures. In this paper, ZnO nano-rod arrays were synthesized by a simple one-step hydrothermal approach with the assistance of cetyl trimethyl ammonium bromide (CTAB). Exposure of the {0001} facets could be controlled by adjusting the amount of CTAB and the maximum exposure of the {0001} facets of ZnO nanorods is obtained at 1.2 g of CTAB. The photocurrent, EIS, and PL measurements support the facile charge transfer with minimum recombination of the photogenerated excitons of the ZnO nano-rod arrays obtained at 1.2 g of CTAB. Consequently, the obtained ZnO nano-rod arrays at the optimal CTAB of 1.2 g exhibit an excellent photocatalytic degradation rate of 99.7% for rhodamine B (RhB), while the degradation rate of RhB by the ZnO obtained without CTAB is only 35%.Keywords:ZnO nano-rod arrays;morphology;{0001} facets;photocatalytic activity
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Huifang Wang,Jun Zhang,Qichong Zhang,Hao Wu,Xiaohong Xu
The p-n heterojunctions with the built-in electric field are often adopted to promote the separation of photoexcited electron-hole pairs and enhance the photoelectrochemical (PEC) performance. However, the interface states often affect the band alignment of ZnO/Cu 2 O heterointerface and cause the decline of PEC performance. In this study, the ultrathin insulating Al 2 O 3 layer was introduced to modify the interface between n-type ZnO nanorod arrays (NRA) and p-type Cu 2 O. Compared to that of ZnO NRA/Cu 2 O, the photocurrent density is significantly improved and onset potential shifts negatively for ZnO NRA-Al 2 O 3 /Cu 2 O. The Al 2 O 3 ultrathin layer is deemed to suppress the photoexcited carriers trapped by the heavy interface defect states via improving the interface quality and block the recombination between electrons in the conduction band of ZnO NRA and holes in the valence band of Cu 2 O. This work broadens the interface modification method of p-n heterojunction and its results are favorable for photovoltaic devices, photodetection and PEC water splitting applications.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2022
·
IF 4.644
Zihan Yin,Yujie Shan,Mingyan Yu,Lun Yang,Jiaming Song,Peng Hu,Feng Teng
As a commonly used substrate and matrix material in the construction of high performance ultraviolet photodetector, ZnO nanorod arrays have attached much attention due to their efficiency electron transmission channels and high stability. However, they also have the problem of slow response speed inevitably. In this work, TiO 2 /ZnO nanorod arrays heterojunction structure was prepared and used to construct ultraviolet photodetector. The obtained heterojunction photodetector has a higher on/off ratio (>1000) and shorter rise/decay time (6.1/3.7 s) compared with that of photodetector based on ZnO nanorod arrays (on/off ratio ∼10 and decay time >20 s). The enhanced response speed is caused by the traps of the electron in TiO 2 layer, which can accelerate the decay of current in the OFF state. The obtained results provide a new sight for the further development of the optoelectronic devices based on ZnO nanorod arrays in future.
研究领域:
材料科学
·
光电材料
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Processes
·
2020
·Vol. 8
·期 6
·655
·
IF 2.753
Xiaofei Sheng,Yajuan Cheng,Yingming Yao,Zhe Zhao
The deposition parameters involved in chemical bath deposition were optimized by a response surface methodology to synthesize upright ZnO rod arrays with large diameters. The effects of the factors on the preferential orientation, aspect ratio, and diameter were determined systematically and efficiently. The results demonstrated that an increased concentration, elevated reaction temperature, prolonged reaction time, and reduced molar ratio of Zn2+to tri-sodium citrate could increase the diameter and promote the preferential oriented growth along the [002] direction. With the optimized parameters, the ZnO rods were grown almost perfectly vertically with the texture coefficient of 99.62. In the meanwhile, the largest diameter could reach 1.77 μm. The obtained rods were merged together on this condition, and a dense ZnO thin film was formed.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
ORGANIC ELECTRONICS
·
2025
·
IF 2.6
Taotao Rao,Qian Qiao,Jun Zhou,Jian Zheng,Xuan Yu,Xiaoming Yu,Cunxi Zhang,Rui Wang
Self-powered hybrid plasmonic photodetectors based on Zinc oxide (ZnO) nanorod arrays (NRAs)/ZnO quantum dots (QDs)/poly(3-hexylthiophene) (P3HT) incorporated with gold nanoparticles (Au NPs) were successfully fabricated. The photoresponse performance of the ZnO NRAs/ZnO QDs/P3HT hybrid photodetectors was enhanced by the incorporation of Au NPs. The optimal ZnO NRAs/ZnO QDs-Au(250) NPs/P3HT organic-inorganic hybrid plasmonic photodetector exhibits a photo-to-dark current ratio of 2450, a responsivity of 46 mA/W and a specific detectivity of 1.88 × 10 11 Jones under 525 nm light illumination and zero bias voltage. This study offers novel insights into the utilization of metal nanoparticles to enhance the performance of organic-inorganic hybrid photodetectors.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 5
·2666-2672
·
IF 3.049
Yuzhi Zhang,Yunlong Zhang,Yunfeng Guo,Lingnan Wu,Yangqiao Liu,Lixing Song
AuPd nanoparticle-decorated graphene-coated ZnO nanorod (ZNR) array electrodes (ZNR@Gr/AuPd) were synthesized via electrostatic self-assembly followed by solution reduction methods. The morphologies of ZNR@Gr/AuPd were characterized with scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM), which indicated that ZNR was well-coated by graphene with 3–5 layers and uniformly decorated with AuPd nanoparticles (about 5 nm). UV-Vis diffuse reflectance and photoluminescence spectra were obtained to analyze the optical properties. The photoelectrochemical (PEC) properties were also evaluated; the results indicated that the photocurrent density was 2.27 mA cm−2 at 0.8 V versus Ag/AgCl, which was 7.1 times that of bare ZNR. The sample also displayed enhanced PEC stability (91.3%), which prevented photocorrosion. Finally, a proposed PEC mechanism of ZNR@Gr/AuPd was illustrated to explain the charge transfer and the role of graphene and AuPd nanoparticles in the improvement of PEC performance and stability. The ZNR@Gr/AuPd electrode shows excellent PEC performance and stability, exhibiting promising potential in the generation of H2.
研究领域:
材料科学
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纳米技术
·
光电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Zhiqing Yang,Yi Wang,Dun Zhang
New approach for fabrication of photoelectrochemical sensing platform has been demonstrated for sulfate-reducing bacteria (SRB) detection based on biosynthesis of CdS quantum dots (QDs) sensitizing ZnO nanorod arrays. ZnO nanorod arrays were synthesized on the FTO substrate via galvanic-cell-based approach and then silanized by (3-Aminopropyl)triethoxysilane (APTES) with amino groups to introduce Cd 2+ . By taking advantage of the characteristic bacterial metabolite (H 2 S) reaction with Cd 2+ , CdS QDs can be biosynthesized on the surface of ZnO nanorod and significant enhancement of photocurrent due to the formation of CdS/ZnO heterostructures. The fabricated PEC sensing platform showed detection sensitivity of 32 cfu/mL for SRB. The current work can provide new strategies to construct advanced PEC sensing platforms for detections of physiologic messenger molecules (H 2 S).
研究领域:
生物技术
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2018
·Vol. 30
·期 2
·025501
·
IF 3.404
Danqing Liu,Tianchan Li,Weicheng Huang,Zhuang Ma,Wei Zhang,Rui Zhang,Hong Yan,Bin Yang,Shaoqin Liu
Foodborne pathogens are perpetual threats to human and animal health. Detection of pathogens requires accurate, sensitive, rapid and point-of-care diagnostic assays. In this study, we described a simple and sensitive electrochemiluminescent (ECL) assay to detect the deadly bacteria Escherichia coli O157:H7 by {\rm{Ru}}{{({\rm{bpy}})}_{3}}^{2+}-coated ZnO nanorods arrays (NAs). The {\rm{Ru}}{{({\rm{bpy}})}_{3}}^{2+}-coated ZnO NAs were fabricated by immobilizing {\rm{Ru}}{{({\rm{bpy}})}_{3}}^{2+} on ZnO NAs with a large specific surface area and good conductivity. An {\rm{Ru}}{{({\rm{bpy}})}_{3}}^{2+}-2-(dibutylamino)-ethanol (DBAE) system coated on ZnO NAs exhibits high ECL intensity, rapid response and good stability. This system was further developed as an ECL immunosensor used in the detection of E. coli O157:H7. The proposed ECL immunosensor exhibits a broad detection range within the scope of 200–100 000 CFU ml−1 and quite a low detection limit of 143 CFU ml−1. The high specificity, remarkable reproducibility and good stability offer a sensitive, selective, and convenient pathway for detecting E. coli O157:H7 in the field of food safety and clinical diagnosis.
研究领域:
食品安全
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临床诊断
·
微生物学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2023
·Vol. 21
·期 1
·1-11
·
IF 10.2
Wu Zhihua,Zhao De,Han Xin,Liu Jichang,Sun Ying,Li Yaogang,Duan Yourong
Background Superhydrophobic substrate modifications are an effective way to improve SERS sensitivity by concentrating analyte molecules into a small surface area. However, it is difficult to manipulate low-volume liquid droplets on superhydrophobic substrates. Results To overcome this limitation, we deposited a hydrophilic Ti 3 C 2 T x film on a superhydrophobic ZnO nanorod array to create a SERS substrate with improved analyte affinity. Combined with its interfacial charge transfer properties, this enabled a rhodamine 6G detection limit of 10 −11 M to be achieved. In addition, the new SERS substrate showed potential for detection of biological macromolecules, such as microRNA. Conclusion Combined with its facile preparation, the SERS activity of ZnO/Ti 3 C 2 T x suggests it may provide an ultrasensitive environmental pollutant-monitoring and effective substrate for biological analyte detection. Graphical Abstract
研究领域:
材料科学
·
分析化学
·
生物医学检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2015
·
IF 2.752
Peifang Wang,Di Wu,Yanhui Ao,Chao Wang,Jun Hou
ZnO nanorod arrays (NRAs) co-loaded with Au nanoparticles (NPs) and reduced graphene oxide (RGO) are fabricated using a simple one-step electrochemical deposition method. The obtained photocatalysts were characterized by field emission scanning electron microscopy, X-ray diffractometer, photoluminescence and UV–vis absorption spectra. The photocatalytic activity of the as-prepared samples was investigated by degradation of methylene blue under visible light irradiation. The results showed that Au/RGO–ZnO NRAs exhibited much higher photocatalytic activity than RGO–ZnO NRAs, Au–ZnO NRAs and pure ZnO NRAs. The synergistic effect of Au NPs and RGO enhances visible light absorption range and transmits the hot electrons more efficiently. This research will encourage more rational design of efficient visible light responsive photocatalysts.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Zhiru Xu,Ligang Xu,Yali Wang,Qunyan Li,Suping Cui,Zuoren Nie,Qi Wei
The separation of methyl tertiary butyl ether (MTBE) from aqueous solution by pervaporation-based membrane technology has attracted much attention recently. The present work proposed a novel strategy to enhance the MTBE/water separation performance of porous α-Al 2 O 3 membranes. ZnO seeds were planted on the surface of α-Al 2 O 3 membranes by the deposition and decomposition of zinc acetate, followed by growing ZnO nanorod arrays (ZNA) on the seeded α-Al 2 O 3 membranes by hydrothermal reaction in the mixed hydrated zinc nitrate (HZN) and hexamethylenetetramine (HMTA) solution. Finally, the membranes were hydrophobized by grafting fluoroalkylsilane (FAS) onto their surface. The results show that the MTBE/water separation factor has been dramatically promoted from 7.7 for the α-Al 2 O 3 membranes to 55.7 for the ZNA-covered α-Al 2 O 3 membranes. The promotion may be attributed to the nearly vertically aligned ZnO nanorod arrays, which provide much surface area to load more fluorocarbon groups that are amiable to MTBE molecules and supply a superhydrophobic surface. The MTBE in the permeate mixture has been concentrated to as high as 72.9 wt%, in striking contrast to 4.6 wt% in the feed solution. The obtained membranes are highly stable upon long-term operation.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2017
·Vol. 2017
·期 32
·3787-3793
·
IF 2.444
Qianji Han,Haikuo Zheng,Mingxing Wu
Graphical Highly effective sulfide-sphere counter electrodes are prepared for ZnO nanorod-based quantum-dot-sensitized solar cells. To increase the competitiveness of quantum-dot-sensitized solar cells (QDSCs) among the various photovoltaic devices, it is necessary to develop new counter-electrode (CE) catalysts to replace the unviable Pt CE. Herein, a series of metal-sulfide spheres (e.g., FeS 2 , Co 9 S 8 , NiS, CuS, and ZnS) are designed and synthesized as CE catalysts for QDSCs. As inferred from cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel polarization-curve results, except for ZnS, all of the sulfide spheres perform better than Pt toward S x 2– /S 2– redox-couple regeneration, among which, NiS shows the highest catalytic activity, followed by Co 9 S 8 , CuS, and FeS 2 . The power conversion efficiencies of ZnO nanorod-array photoanode-based QDSCs with sulfide-sphere CEs are 2.5 % (NiS), 2.2 % (Co 9 S 8 ), 1.8 % (CuS), and 0.8 % (FeS 2 ), much higher than that of their Pt CE-based counterparts (0.30 %).
研究领域:
材料科学
·
能源技术
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）