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
BIOSENSORS & BIOELECTRONICS
·
2017
·
IF 7.78
Xiaoqiang Liu,Xiaohe Huo,Peipei Liu,Yunfei Tang,Jun Xu,Huangxian Ju
In this work, an ultrasensitive immunosensing scaffold was structured with TiO 2 nanowire (TiNW) arrays modified with molybdenum (Mo) and MoS 2 flakes by a triplex “etching, doping and deposition” technique. The triply modification of TiNW arrays improved their electron transfer , and the decoration of MoS 2 flakes on TiNW arrays increased both the conductivity and the specific surface area of TiNW. Accordingly, the triply modified TiNW arrays provided a biocompatible microenviroment for the biomolecules and high specific surface area to load big amount of biomolecules . The immunosensor was prepared by immobilizing capture antibody on the scaffold surface with double amino-reactive crosslinker , and the tracing labels were prepared by immobilizing signal antibody and horseradish peroxidase molecules on cylinder-shaped TiO 2 nanorods . After sandwich-type immunoreaction, the tracing labels were quantitatively captured on the immunosensor surface for the detection of carcinoembryonic antigen as a model analyte. This amperometric method showed a linear range of 0.001 and 150 ng mL −1 with a detection limit of 0.5 pg mL −1 . This work provided a promising platform for sensitive amperometric immunosensing of protein biomarkers.
研究领域:
生物医学工程
·
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 27
·期 7
·7150-7160
·
IF 1.798
Yu Libo,Ren Xuefeng,Yang Zirong,Han Yuqi,Li Zhen
Highly ordered TiO 2 nanowire (NW) arrays were constructed by hydrothermal process as support materials for quantum dot sensitized solar cells (QDSSCs). The CdS x Se 1−x alloyed quantum dots (QDs) with tunable composition have been assembled onto the TiO 2 NW arrays via a facile hydrothermal method to form CdS x Se 1−x /TiO 2 NW photoanodes. The light absorption range of the CdS x Se 1−x /TiO 2 NW photoanodes can be controlled by changing the atomic ratio of S to Se. Based on CdS x Se 1−x /TiO 2 NW photoanodes, the photovoltaic performance of these CdS x Se 1−x /TiO 2 NW solar cells gradually improved as the increase of Se content in CdS x Se 1−x alloyed QDs. Among all sample CdS x Se 1−x /TiO 2 NW solar cells which were prepared with different feed molar ratio of S:Se, the CdS 0.27 Se 0.73 /TiO 2 NW solar cell (prepared with S:Se = 0:4) produced the highest power conversion efficiency up to 2.46 %. The results of investigation into optical properties and incident photon-to-current conversion efficiency indicates that the enlarged light absorption range and effective photo-to-electrical efficiency can be obtained with Se-rich CdS x Se 1−x /TiO 2 NW photoanodes, which contribute to the enhanced photovoltaic performance of the CdS 0.27 Se 0.73 /TiO 2 NW solar cell.
研究领域:
材料科学
·
纳米科技
·
能源化学
·
半导体物理
·
光伏技术
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 19
·6284-6289
·
IF 4
Ning Zhang,Huili Li,Bo Yao,Shiyan Liu,Jun Ren,Yawei Wang,Zebo Fang,Rong Wu,Shunhang Wei
Construction of a heterojunction between quantum dots and TiO2 nanowire arrays via electrostatic self-assembly is rarely reported. In this work, mercury lamp irradiation was used to change the surface potential of WO3 quantum dots and TiO2 nanowire arrays, resulting in WO3 quantum dots tightly attached on the surface of TiO2 nanowire through electrostatic self-assembly. Photoelectrochemical measurements showed that the WO3 quantum dots formed a type II heterojunction with the TiO2 nanowire arrays rather than serving as carrier-trapping sites. In the self-assembly system, the TiO2 nanowire arrays provide a charge-transfer channel for the WO3 quantum dots, greatly improving the contribution of the WO3 quantum dots to the photocurrent. Quantitative calculations showed that the improvement of the bulk carrier-separation efficiency was the reason for the enhanced photoelectrochemical performance of the self-assembled system. The photocurrent density of the optical self-assembled system at 1.23 V (vs. RHE) was ∼5.5 times as high as that of the TiO2 nanowire arrays. More importantly, the self-assembled system exhibited excellent photoelectrochemical stability.
研究领域:
材料科学
·
纳米技术
·
光电化学
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2019
·Vol. 26
·期 2
·971-979
·
IF 2.289
Huo Jinghao,Xue Yujia,Cheng Cheng,Guo Shouwu
Solid-state cable-type supercapacitors (SSCTSs) have a wide application in wearable and flexible electronic devices. The fiber-shaped electrode of fabricating TiO 2 nanowire arrays (NWAs) on Ti wire is widly used in flexible electronic devices. For improving the conductivity, reduced graphene oxide (rGO) nanosheets are prepared on the surface of TiO 2 NWAs by a simple electrophoretic deposition method and NaBH 4 treatment. The electrochemical tests reveal that this TiO 2 /rGO electrode has an excellent capacitive property than pure TiO 2 electrode in the optimum potential window (− 0.4~0.6 V). Two similar TiO 2 /rGO electrodes with Poly (vinyl alcohol)-LiCl solid-state electrolyte are assembled SSCTSs, which deliver a specific capacitance as high as 60.8 μF cm −1 at 5 μA cm −1 and a high energy density of 12.2 mWh cm −1 with a wide potential window from 0 to 1.2 V. Furthermore, this SSCTS exhibits outstanding banding performance at different state and long cycle life. These results demonstrate that fiber-shaped TiO 2 /rGO electrode is promising for high-performance wearable and flexible electronic devices.
研究领域:
材料科学
·
电化学
·
纳米技术
·
柔性电子
·
能源存储
✓ 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）