COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2021
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IF 7.664
Wenjing Ji,Guojie Zhao,Guilin Hu,Li Fan,Hua Deng,Qiang Fu
Film capacitors can be used as energy storage for fast storage and release energy, but the low energy density limits their applications. In our previous study, we have demonstrated that a small amount of 2D titanium dioxide (TiO 2 ) nanobelts in PVDF could significantly enhance the energy density of these composite films . In order to increase the dielectric constant and energy density of these composites, multi-walled carbon nanotubes (MWCNTs) are introduced into these 2D TiO 2 nanobelts obtained during electrospinning, and parallelly oriented along these 2D nanobelts. The shell formed by insulating TiO 2 can avoid the formation of conductive network and realize high polarization efficiency. It’s shown that when the ratio of MWCNTs and TiO 2 in the composite filler is 1:30, the breakdown voltage of the filler can achieve 478 kV/mm, the polarizability is 8.34 μC/cm 2 , and the energy density is increased from 2.87 J/cm 3 to 17.97 J/cm 3 comparing with neat PVDF.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
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2017
·Vol. 47
·期 2
·348-356
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IF 4.029
Hao Xu,Dongsheng Dai,Songsong Li,Lei Ge,Yangqin Gao
Semiconductor-based photocatalytic hydrogen evolution from water with earth-abundant and low cost co-catalysts has attracted much attention. Herein, novel Cu2(OH)2CO3 decorated 2D TiO2 nanosheets for photocatalytic water splitting were synthesized by a facile in situ synthetic method. The chemical and photophysical properties of Cu2(OH)2CO3/TiO2 nanosheets were investigated by X-ray diffractometry (XRD), transmission electron microscopy (TEM), UV-vis diffusion reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry (CV) analysis. At an optimal Cu2(OH)2CO3 loading content of 1.5 mol%, the hybrid photocatalyst delivers a high photocatalytic H2 production rate of 1555.07 μmol g−1 h−1. Such enhanced photocatalytic activity is attributed to tight interfaces formed between Cu2(OH)2CO3 nanoparticles and TiO2 nanosheets, which play a vital role in the separation of photo-excited carriers, and the formation of active Cu1+ and Cu0 species can also benefit the charge separation process by reducing the over-potential of water reduction. Based on the above results, a possible mechanism is proposed and further verified using photoluminescence (PL) spectra. This work may provide more insight into the synthesis of novel Cu2(OH)2CO3/TiO2 nanosheets with high photocatalytic H2 evolution activity for solar-to-chemical conversion and utilization.
研究领域:
材料科学
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光催化
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纳米材料
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能源化学
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半导体物理
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太阳能转化
✓ 已验证
DOI
高影响因子
TALANTA
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2018
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IF 4.244
Chan Gao,Deshuai Zhen,Ni He,Zhengbin An,Qiulan Zhou,Chenyi Li,Craig A. Grimes,Qingyun Cai
High surface area (136 m 2 g −1 ) nanoporous two-dimensional TiO 2 nanoflakes are applied as an adsorbent and meanwhile a matrix for toxic small molecule analysis using positive-ion surface-assisted laser desorption/ionization time-of-flight mass spectrometry (SALDI-TOF MS). The TiO 2 nanoflakes enable one-step enrichment and analysis, greatly simplifying the analysis technique. Due to the high enrichment efficiency and low background noise, small molecule organic contaminants at ppt or even sub-ppt concentrations such as malachite green (10 pg/mL), leucomalachite green (10 pg/mL), cetyltrimethylammonium bromide (0.001 pg/mL), rhodamine B (0.001 pg/mL), and crystal violet (0.1 pg/mL) were detected. In addition, malachite green and its metabolite leucomalachite green at ng/mL concentrations were successfully detected from fish blood and fish extracts, and crystal violet and its homologues at ng/cm 2 concentrations were detected from inks on thermal receipt papers obtained from local supermarket.
研究领域:
分析化学
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环境科学
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毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2025
·
IF 19
Yange Luan,Qijie Ma,Yihong Hu,Xinyi Hu,Guanyu Chen,Jiaru Zhang,Zhong Li,Dongdong Xie,Guanghui Ren,Yunyi Yang,Guifu Ding,Kate Fox,Bao Yue Zhang,Jian Zhen Ou
2D nanomaterials have shown significant advances in next-generation biosensor development. However, current 2D-enabled electronic biosensors rarely achieve a detection limit down to pico-gram level, possibly due to their intrinsic low carrier mobilities, biocompatibility or instability. TiO 2 , a biocompatible material, has been widely adopted in bio-applications. Recently, 2D TiO 2 with a unique planar hexagonal phase exhibits a reduced bandgap of 2 eV and high p-type mobility. A small perturbation could stimulate an observable electronic swing, enabling a high-performance biosensor in a label-free manner. Here, 2D h-TiO 2 is fabricated into a liquid-gated field-effect transistor, while a wide spectrum, nonspecific biomarker carcinoembryonic antigen (CEA) is selected as the target molecule. The h-TiO 2 surface is first functionalized with 3-aminopropyltriethoxysilane and subsequently decorated with anti-CEA, creating an affinity probe toward CEA molecules. The real-time response to different concentrations of CEA is tested from 1 pg mL −1 to 10 ng mL −1 under a low working voltage of 0.05 V, and an ultralow detection limit of 0.22 pg mL −1 is achieved. Meanwhile, the selectivity of the devices is demonstrated using cytokeratin-19-fragment and neuron-specific enolase. The results highlight the potential of layered hexagonal metal oxides for high-performance biosensors, enabling future low-power portable devices for disease diagnosis.
研究领域:
纳米材料
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生物传感器
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电子器件
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生物医学诊断
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材料科学
✓ 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）