ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Haowei Lin,Kai Chen,Mingke Li,Beibei Ji,Yaohui Jia,Xinyu Liu,Jinling Li,Weiqiang Song,Chunlong Guan
We demonstrate that a novel photodetector is constructed by CdS/poly(p-phenylene vinylene) (PPV) homogeneous hybrid nanowire arrays via a simple template-assisted electrochemical codeposition approach. Owing to the well-matched energy levels between CdS and PPV, the recombination of photogenerated electrons and holes in CdS/PPV hybrid nanowire arrays is greatly inhibited. It is found that the homogeneous hybrid nanowire arrays exhibit remarkably enhanced photoelectric response and the ON/OFF ratio by 17 times compared to the individual CdS component. More importantly, the CdS/PPV hybrid nanowire arrays are observed with significant spectral selectivity especially for green light under 545 nm. In addition, a straight linear relationship is obtained between the ON/OFF ratios and the illumination intensities, implying that the quantitative detection of illumination intensity can be achieved. The new as-prepared homogeneous hybrid organic/inorganic semiconductor nanowire arrays have a bright prospect for applications in high-sensitivity and high-speed green photodetectors.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Sustainable Energy & Fuels
·
2022
·Vol. 7
·期 2
·389-397
·
IF 6.813
Junwei Li,Yige Wang,Wenwei Liu,Zhenyi Liang,Chunlei Fan,Jinying Li,Shengxu Luo,Haoxiong Nan,Jia Yu
With the aggravation of the environmental pollution problem and the depletion of natural resources, hydrogen production based on water splitting technology has become an effective method to satisfy the increasing demand for renewable energy. It is vital to design high-efficiency and low-cost electrocatalysts for water splitting. Herein, an electrocatalyst (Co3O4–S/NF) with a surface-sulphurated nanowire array structure is controllably synthesized for catalysing the oxygen evolution reaction (OER) process. Co3O4–S/NF (1 : 0.5) exhibits the best OER activity with an overpotential of 297 mV at 100 mV cm−2, which is lower than the overpotential (331 mV) of commercial Ir/C/NF. Additionally, the water-splitting voltage of the Co3O4–S/NF//Pt/C/NF electrolyzer reaches 1.571 V at 20 mV cm−2, which is also better than that of conventional noble-metal electrocatalysts. Notably, Co3O4–S/NF//Pt/C/NF also shows excellent efficiency in seawater electrolysis. The voltage reaches 1.656 V in a simulated alkaline seawater electrolyte (1 M KOH + 0.5 M NaCl) and 1.722 V in an alkaline seawater electrolyte (1 M KOH in seawater). This work can provide a robust electrocatalyst design for water electrolysis.
研究领域:
材料科学
·
可再生能源
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2022
·Vol. 12
·期 8
·1027
·
IF 2.67
Ningzhe Yan,Hao Luo,Yanan Liu,Haiping Yu,Guangyin Jing
Regulating the swimming motility of bacteria near surfaces is essential to suppress or avoid bacterial contamination and infection in catheters and medical devices with wall surfaces. However, the motility of bacteria near walls strongly depends on the combination of the local physicochemical properties of the surfaces. To unravel how nanostructures and their local chemical microenvironment dynamically affect the bacterial motility near surfaces, here, we directly visualize the bacterial swimming and systematically analyze the motility ofEscherichia coliswimming on ZnO nanoparticle films and nanowire arrays with further ultraviolet irradiation. The results show that the ZnO nanowire arrays reduce the swimming motility, thus significantly enhancing the trapping ability for motile bacteria. Additionally, thanks to the wide bandgap nature of a ZnO semiconductor, the ultraviolet irradiation rapidly reduces the bacteria locomotion due to the hydroxyl and singlet oxygen produced by the photodynamic effects of ZnO nanowire arrays in an aqueous solution. The findings quantitatively reveal how the combination of geometrical nanostructured surfaces and local tuning of the steric microenvironment are able to regulate the motility of swimming bacteria and suggest the efficient inhibition of bacterial translocation and infection by nanostructured coatings.Keywords:ZnO nanowire arrays;bacteria motility;antibacterial;particle tracking
研究领域:
微生物学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2017
·Vol. 10
·期 4
·710-715
·
IF 4.803
Liang Cui,Xueying Cao,Xuping Sun,Wenrong Yang,Jingquan Liu
Graphical Pick of the bunch : A bunch-like CuO nanowire array on copper foam (b-CuO NA/CF) is obtained by a facile and economical method. This nanowire array behaves as an efficient and durable catalyst for hydrogen generation from the controlled methanolysis of ammonia borane (AB). The dehydrogenation of ammonia borane (AB) is an effective method to produce and store hydrogen, but efficient, durable, and low-costing dehydrogenation catalysts are lacking. In this work, we successfully prepared a self-supported bunch-like copper oxide nanowire array on copper foam (b-CuO NA/CF) through a facile in situ wet oxidation and annealing method. b-CuO NA/CF shows high catalytic activity for the methanolysis of AB with an initial turnover frequency of 13.3 mol mol CuO −1 min −1 and an activation energy of 34.7 kJ mol −1 . Moreover, this self-supported bunch-like nanoarray catalyst could be easily separated from fuel solutions with excellent stability and maintained its activity even after prolonged use. It is thus an efficient, economical, and durable catalyst for hydrogen fuel cells.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2017
·Vol. 22
·期 2
·337
·
IF 2.861
Fang Li,Wai Szeto,Haibao Huang,Jiantao Li,Dennis Y. C. Leung
A photocatalytic rotating disc reactor (PRD-reactor) with TiO2nanowire arrays deposited on a thin Ti plate is fabricated and tested for industrial wastewater treatment. Results indicate that the PRD-reactor shows excellent decolorization capability when tested with methyl orange (>97.5%). Advanced oxidation processes (AOP), including photocatalytic oxidation and photolytic reaction, occurred during the processing. Efficiency of the AOP increases with reduction in light absorption pathlength, which enhanced the photocatalytic reaction, as well as by increasing oxygen exposure of the wastewater thin film due to the rotating disc design. It is found that, with a small dosage of hydrogen peroxide, the mineralization efficiency of industrial biodegraded wastewater can be enhanced, with a superior mineralization of >75% total organic carbon (TOC) removal. This is due to the fact that the TiO2photocatalysis and hydrogen peroxide processes generate powerful oxidants (hydroxyl radicals) that can strongly improve photocatalytic oxidation efficiency. Application of this industrial wastewater treatment system is benefited from the TiO2nanowire arrays, which can be fabricated by a mild solvothermal method at 80 °C and under atmospheric pressure. Similar morphologies and microstructures are found for the TiO2nanowire arrays deposited on a large metal Ti disc, which makes the wastewater treatment process more practical and economical.Keywords:TiO2nanowire arrays;photocatalytic rotating reactor;wastewater treatment
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Rong-Rong Su,Yu-Xiang Yu,Yong-Hao Xiao,XianFeng Yang,Wei-De Zhang
CuSbS 2 is regarded as a promising photo-absorber for solar energy conversion due to its proper bandgap, high absorptivity and earth abundance. Herein, novel low-cost ZnO/CdS/CuSbS 2 core-shell nanowire arrays were constructed as photoanode for hydrogen evolution through non-aqueous electrodeposition and cation exchange. The nanowire demonstrates even and compact multilayer structure. The optimal ZnO/CdS/CuSbS 2 photoanode achieves a photocurrent of 6.48 mA/cm 2 at 0 V versus Ag/AgCl and the remarkable IPCE value with approximately 52% at 480 nm in an electrolyte solution containing 0.35 mol/L Na 2 SO 3 and 0.25 mol/L Na 2 S. It also exhibited a good stability, maintained 87.9% of the initial current after 1 h measurement. The high performance benefits from well-crystalline and compact multilayer structure, high absorptivity of CuSbS 2 and CdS, p-n junction formed between CdS and CuSbS 2 which promotes the electron-hole separation and ZnO nanowire array as three dimensional scaffolds for electron percolation pathway. This work suggests the potential applications of low-cost p-n junction core-shell nanowire arrays as a highly efficient photoanode for hydrogen evolution in oil-field waste water with reductive sulfide.
研究领域:
材料科学
·
能源转换
·
光电化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Fangyou Meng,Yuan Yu,Dongfeng Sun,Li Li,Songmin Lin,Luo Huang,Wenhui Chu,Shufang Ma,Bingshe Xu
A novel three-dimensional (3D) flower-like tungsten phosphide (WP 2 ) nanowire arrays catalyst in-situ grown on nickel foam (NF) is explored. Since this 3D nanostructured electrocatalysts (WP 2 NW/NF) can expose the abundant active sites, and promote electrolyte osmosis to shorten the electron transfer path, the WP 2 NW/NF electrode shows excellent electrocatalytic performance. The current densities of the 3D nanostructured WP 2 NW/NF electrode achieve 10 mA cm −2 at lower cell potential of 1.65 V for overall water splitting, revealing that this 3D nanostructured electrode possesses great application prospect in electrolysis of water to produce large-scale hydrogen and oxygen.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2016
·Vol. 8
·期 47
·19779-19786
·
IF 7.76
Mingyu Pi,Tianli Wu,Dingke Zhang,Shijian Chen,Shuxia Wang
The design and development of high-efficiency and non-noble metal hydrogen evolution reaction (HER) electrocatalysts with optimized nanostructures for human clean and sustainable energy systems has attracted significant research interest over the past years. Herein, self-supported semimetallic tungsten diphosphide nanowire arrays on carbon cloth (WP2 NWs/CC) were topotactically fabricated by in situ phosphidation of a WO3 NWs/CC precursor. Such a binder-free flexible HER cathode with integrated three-dimensional nanostructures can not only provide a large surface area to expose abundant active sites, but also facilitate electrolyte penetration for electrons and electrolyte ions. The WP2 NWs/CC electrode exhibits superior catalytic performance, and it needs overpotentials of 109 and 160 mV with a small Tafel slope of 56 mV dec−1 to achieve current densities of 10 and 50 mA cm−2, respectively. High stability in acidic media is also observed for the catalyst for a duration of 20 hours at least. In addition, density functional theory (DFT) calculations indicate a low kinetic energy barrier for H atom adsorption on the WP2 surface which guarantees the excellent catalytic activity of the catalyst, and the influences of phosphidation temperature on the HER activity are also studied. The excellent electrocatalytic activity makes the present 3D structured WP2 NWs/CC a promising catalyst for large scale highly pure hydrogen evolution by electrochemical water splitting.
研究领域:
材料科学
·
能源科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
·
2021
·Vol. 11
·期 10
·1237
·
IF 4.146
Maoqi Cao,Xiaofeng Li,Dingding Xiang,Dawang Wu,Sailan Sun,Hongjing Dai,Jun Luo,Hongtao Zou
Electrochemical hydrogen evolution reactions (HER) have drawn tremendous interest for the scalable and sustainable conversion of renewable electricity to clear hydrogen fuel. However, the sluggish kinetics of the water dissociation step severely restricts the high production of hydrogen in alkaline media. Tuning the electronic structure by doping is an effective method to boost water dissociation in alkaline solutions. In this study, N-doped CoO nanowire arrays (N-CoO) were designed and prepared using a simple method. X-ray diffraction (XRD), element mappings and X-ray photoelectron spectroscopy (XPS) demonstrated that N was successfully incorporated into the lattice of CoO. The XPS of Co 2p and O 1s suggested that the electronic structure of CoO was obviously modulated after the incorporation of N, which improved the adsorption and activation of water molecules. The energy barriers obtained from the Arrhenius relationship of the current density at different temperatures indicated that the N-CoO nanowire arrays accelerated the water dissociation in the HER process. As a result, the N-CoO nanowire arrays showed an excellent performance of HER in alkaline condition. At a current density of 10 mA cm−1, the N-CoO nanowire arrays needed only a 123 mV potential, which was much lower than that of CoO (285 mV). This simple design strategy provides some new inspiration to promote water dissociation for HER in alkaline solutions at the atomic level.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 25
·9247-9254
·
IF 5.7
Zhaolin Song,Menghua Zhu,Sixin Chen,Meng Xu,Wanqi Jie
All-inorganic halide perovskite CsPbBr3 with superior environmental stability, remarkable radiation hardness and great defect tolerance has emerged as a competitive material in radiation detection. However, the operational stability of CsPbBr3 based detectors remains a problem due to their unstable electrical properties. Perovskite nanowires with a preferred orientation show greater accessibility compared with their single-crystal partners that undergo time-consuming growth. However, the synthesis of perovskite nanowire arrays with excellent stability, tunable distribution arrangements and adjustable compositions has been a major challenge. Herein, CsPbBr3 perovskite columnar crystal films with a controlled diameter (50–400 nm) are successfully synthesized with porous anodic aluminum oxide (AAO) templates. The passivated surface between AAO and CsPbBr3 nanowires resulted in reduced ion migration and stable operation performance. The CsPbBr3 based X-ray detectors display a low dark current drift of 2.185 × 10−6 nA cm−1 s−1 V−1, a high resistivity of 3.946 × 1011 Ω cm and a detection limit of 3.70 μGyair s−1 with an AAO pore size of 50 nm. This work establishes a suitable method to synthesize all-inorganic perovskite nanowires with controlled diameters for stable X-ray detection performance.
研究领域:
材料科学
·
辐射探测技术
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2016
·Vol. 10
·期 2
·595-604
·
IF 8.893
Cui Liang,Xu Yuanhong,Niu Li,Yang Wenrong,Liu Jingquan
The issues of hydrogen generation and storage have hindered the widespread use and commercialization of hydrogen fuel cell vehicles. It is thus highly attractive, but the design and development of highly active non-noble-metal catalysts for on-demand hydrogen release from alkaline NaBH 4 solution under mild conditions remains a key challenge. Herein, we describe the use of CoP nanowire array integrated on a Ti mesh (CoP NA/Ti) as a three-dimensional (3D) monolithic catalyst for efficient hydrolytic dehydrogenation of NaBH 4 in basic solutions. The CoP NA/Ti works as an on/off switch for on-demand hydrogen generation at a rate of 6,500 mL/(min·g) and a low activation energy of 41 kJ/mol. It is highly robust for repeated usage after recycling, without sacrificing catalytic performance. Remarkably, this catalyst also performs efficiently for the hydrolysis of NH 3 BH 3 .
研究领域:
材料科学
·
催化
·
能源存储
·
氢燃料电池
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 36
·19072-19078
·
IF 8.867
Bowen Ren,Dongqi Li,Qiuyan Jin,Hao Cui,Chengxin Wang
The development of non-noble metal electrocatalysts for the hydrogen evolution reaction (HER) has attracted much attention. Metal nitrides have been considered as promising alternatives in recent years. Nevertheless, the preparation of tungsten nitride still suffers from disadvantages such as environmentally unfriendly sources and poor morphologies, which induce a relatively low activity. Herein we employed clean N2-plasma to develop a 3D WN nanowire array on carbon cloth (WN NW/CC) with a porous structure. As expected, the resulting WN NW/CC is highly active, giving a small η10 (overpotential to drive a current of 10 mA cm−2) of 134 mV and a Tafel slope of 59.6 mV dec−1 in acidic solution, and an η10 of 130 mV and a Tafel slope of 57.1 mV dec−1 in alkaline solution, respectively. Additionally, it maintains its catalytic activity for at least 14 500 s in both acidic and alkaline media.
研究领域:
材料科学
·
电化学
✓ 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）