NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 6
·2303-2311
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IF 3.288
Ning Jiang,Hongchao Geng,Yan Qiao,Xingqi Zhu,Chenyi Li,Qingyun Cai
A visible-light-active CuInSe2:Zn/g-C3N4/TiO2 nanowire (NW) photoelectrode was prepared by in situ growth of g-C3N4 on the surface of TiO2 NWs, followed by drop deposition of Zn-doped CuInSe2 quantum dots (CuInSe2:Zn QDs). It has a 2.205 eV band gap and can absorb visible light. The as-prepared ternary hybrid nanocomposite CuInSe2:Zn/g-C3N4/TiO2 NWs shows high photon absorption and photocurrent generation efficiency, as well as a high bactericidal effect on Staphylococcus aureus.
研究领域:
材料科学
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微生物学
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环境科学
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产品关联
DOI
高影响因子
THIN SOLID FILMS
·
2018
·
IF 1.939
Qing-Er Zhao,Wei Wen,Yu Xia,Jin-Ming Wu
This study establishes the feasibility to enhance the photocatalytic activity of nanostructured TiO 2 thin films through embedding the free spaces with sol-gel TiO 2 nanoparticles . With the various additives in the aqueous H 2 O 2 solutions, thin films of TiO 2 nanorods , nanowires, and nanoflowers were precipitated on metallic Ti substrates via the Ti-H 2 O 2 interactions at 80 °C for 72 h. About 3–7% anatase TiO 2 nanoparticles were then embedded successfully among the free spaces of the nanostructures by immersing them into a titania sol followed by lifting up with an appropriate withdrawing speed. When utilized to assist degradations of phenol in water under UV light illumination, the photocatalytic activity for thin films of nanorods and nanowires after filling with sol-gel TiO 2 nanoparticles is 76% and 136% higher than that of the pristine films, respectively. The films also exhibited high stability upon cycling tests, which could thus find potential applications in wastewater treatments.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2016
·Vol. 27
·期 7
·7150-7160
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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
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纳米科技
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能源化学
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半导体物理
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光伏技术
✓ 已验证
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2018
·
IF 2.943
Yi-Yi Liu,Xin-Yu Ye,Qing-Qing An,Bing-Xin Lei,Wei Sun,Zhen-Fan Sun
The bottom-straight and top-bent dual anatase TiO 2 nanowires directly on flurine-doped tin oxide (FTO) glass substrate are successfully synthesized for the first time via a two-step solvothermal reaction, which obtains single anatase TiO 2 nanowires with the diameter of 250–450 nm and the length of ∼49 μm in the first growth step, and the slender TiO 2 nanowires with the diameter of 40–80 nm intertwining larger nanowires to form dual nanowires network in the secondary growth step. Dye-sensitized solar cell (DSSC) based on dual TiO 2 nanowires exhibits the power conversion efficiency of 5.30%, which is much higher than those of DSSCs based on the pristine single TiO 2 nanwires (2.36%) due to the twining network like dual nanowires structure maintaining excellent electron transport and simultaneously enhancing the specific surface area and light scattering ability. Moreover, by TiO 2 sol treatment, the performance of dual TiO 2 nanowires based DSSC can be further enhanced, reaching an impressive power conversion efficiency (PCE) of 7.65%.
研究领域:
材料科学
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纳米技术
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太阳能
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
OPTICS EXPRESS
·
2019
·Vol. 27
·期 17
·23981-23995
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IF 3.561
Anxin Jiao,Hua Zhang,Linlin Xu,Yue Tian,Xiangdong Liu,Ming Chen,Feng Chen
The blue laser beam-excited surface-enhanced Raman scattering (SERS)-based pH sensing holds great promise for avoiding undesired thermal heating effect on some special temperature-vulnerable molecules, as compared to the vast majority studies by exciting in the red or near-infrared (NIR). Herein, we report an ingenious approach to support core-shell Au@Ag nanodendrites (NDs) on TiO2 nanowires, which can possess enhanced SERS activity under 473 nm laser excitation, owing to the improved charge-transfer effect on modified TiO2 support by inserting plasmonic Au@Ag. By using pH-indicating 4-mercaptobenzoic acid (4-MBA), the obtained TiO2/Au@Ag NDs can not only exhibit high sensitive linear-responses of pH changes ranging from pH 4.0 to 9.0 in different solutions (deionized water, NaCl, CaCl2, and MgCl2) but also provide excellent temperature stability under 4°C, 25°C and 37°C temperatures as well as good time stability after storage for 10 days. The established SERS-pH sensing by using shorter wavelength laser excitation is highly desirable for understanding physiological process in temperature-vulnerable microenvironment.
研究领域:
材料科学
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分析化学
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纳米技术
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光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 44
·34737-34743
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IF 3.84
Yufeng Shan,Yong Yang,Yanqin Cao,Hao Yin,Nguyen Viet Long,Zhengren Huang
Recently, surface-enhanced Raman scattering (SERS) has been the subject of great interest because of its ultrasensitive, rapid and nondestructive analysis, detection, and imaging. Highly sensitive, stable and recyclable substrates are of great importance in fulfilling the practical potential of the technique in various fields, such as trace analysis, diagnosis and criminal investigation. In this work, we introduce wafer-scale Ag-modified hydrogenated black TiO2 nanowires as active SERS substrate by hydrogenation. The Ag/H–TiO2 NWs substrates deliver a relative enhancement factor of up to ∼102 compared with the substrate before hydrogenation and a detection limitation improved by at least three orders of magnitude compared with R6G detection. Moreover, hydrogenated TiO2/Ag also exhibits outstanding stability, and is recyclable by self-cleaning under UV irradiation. The excellent SERS performance is ascribed to the abundant surface electronic states induced by the hydrogenated amorphous layers and trivalent titanium, and more photogenerated charge carriers may contribute to the chemical and electromagnetic enhancement. The relative standard deviation (RSD) value for Raman signals less than 0.15 confirms the reproducibility of the hydrogenated composite SERS substrate. Therefore, the hybrid SERS substrates have great advantages in self-cleaning, reproducibility and stability, making them promising candidates for sensitive and recyclable SERS detection.
研究领域:
材料科学
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纳米技术
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分析化学
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光学
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产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2021
·
IF 10.618
Yan Sun,Peipei Li,Yu Zhu,Xiaohua Zhu,Youyu Zhang,Meiling Liu,Yang Liu
A sensitive electrogenerated chemiluminescence (ECL) biosensor for glucose was developed based on in situ growth of TiO 2 nanowires on Ti 3 C 2 MXenes (TiO 2 –Ti 3 C 2 ) as the nanoplatform. Via tuning the alkaline oxidation time, different amount of TiO 2 nanowires can be found on MXenes. An ECL biosensor for glucose was constructed by covalent immobilization of glucose oxidase (GODx) on the glycine functional TiO 2 –Ti 3 C 2 surface, with the ECL signal depending on the in-situ formation of H 2 O 2 via the specifically catalysis of glucose by GODx, resulting in the apparent increase of ECL signal. The TiO 2 –Ti 3 C 2 can also act as the catalyst for the oxidation of H 2 O 2 into O 2 to enhance the ECL of luminol. Based on this strategy, a highly sensitive ECL biosensor for glucose was obtained in wide concentration range of 20 nM-12 mM with a low detection limit of 1.2 nM (S/N = 3). The synergistic effects of large surface area, excellent conductivity, and high catalytic activity of the TiO 2 –Ti 3 C 2 make the sensor highly sensitive toward glucose; the specific enzyme catalysis reaction promises excellent selectivity of the ECL sensor. The proposed biosensor has been employed to detect glucose in human serum, fruits, and sweat samples with excellent performance, providing a universal approach for glucose in various samples, which shows great prospect in clinical diagnostics and wearable sensors .
研究领域:
分析化学
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生物传感器
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材料科学
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生物医学工程
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临床诊断
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 19
·6284-6289
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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
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可再生能源
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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
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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）