Journal of Physical Chemistry C
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2020
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IF 4.189
Qian Ji,YaFei Hou,ShiXin Wei,Yang Liu,Peng Du,LaiHui Luo,Wei Ping Li
TiO2 nanoarray (TNA) is usually used to improve the energy storage performance of the polymer composite; however, owing to the paradox between polarization and breakdown strength, the discharged energy density of TNA-based composite is always restricted. In this study, a novel bilayer composite with excellent energy storage performance has been designed and fabricated by combining aligned TNA and random TiO2 nanowires (TO NWs) with poly(vinylidene fluoride) (PVDF) matrix. Interestingly, a superior discharged energy density of 16.13 J/cm3 was obtained in the (5 vol % TO NWs/TNA)–PVDF composite, which is 2.0 times higher than that of pure PVDF matrix (8.23 J/cm3) due to the simultaneously improved polarization and breakdown strength. Additionally, the corresponding energy efficiency remains high (77.37%) owing to the nonferroelectric characteristics of the TO fillers and the suppressed leakage current density. Considering the excellent and sharply incremental discharged energy density and superior energy efficiency of the (5 vol % TO NWs/TNA)–PVDF composite, this demonstrated work provides a method to obtain high discharged energy density and energy efficiency simultaneously.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2019
·Vol. 30
·期 12
·11108-11116
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IF 2.195
Jiang Xishun,He Wenjun,Zheng Shaokang,Shi Yonghua,Sun Zhaoqi
A series of TiO 2 nanostructures with rutile phase were synthesized on arbitrary substrates of conductive transparent fluorine-doped tin oxide (FTO), tin-doped indium oxide (ITO), and glass at the low temperature of 150 °C by the hydrothermal method. The samples were characterized by XRD, SEM, TEM, XPS, UV–Vis absorption, and micro-Raman spectroscopy. The effects of growth substrates on the morphologies and optical properties of nanostructures were investigated. TiO 2 nanorods were grown on the FTO substrate, while TiO 2 nanoflowers were grown on the ITO and glass substrates, and the growth mechanism for these different nanostructures is discussed in detail. The results show that the TiO 2 nanorods can improve photocatalytic properties and photoelctrochemical (PEC) performance for its unique structure and optical properties. The TiO 2 nanorods exhibited a maximal photocatalytic rate of 4.42 min −1 and photocurrent density of 0.049 mA/cm 2 , which is about 1.52 and 3.03 times higher than those of TiO 2 nanoflowers grown on the ITO substrates, respectively. These findings are quite promising and encouraging for the use of TiO 2 nanoarrays in photocatalysis and energy applications.
研究领域:
材料科学
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纳米技术
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能源应用
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光催化
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
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IF 7.4
Dong Wang,Xiao Zhang,Wenbin Shi,Ping Yang
Expanding light response is a significant approach to increase the harvesting efficiency of solar energy for photocatalysts. In this paper, aqueous CsPbBr 3 nanocrystals (NCs) were created using sol-gel glass as a reactor. These bright SiO 2 glass-coated NCs were decorated on hollow TiO 2 bowl array (TBN) via mechano-chemical pre-reaction and subsequent hydrothermal treatment for the first time to enhance the photocatalytic performance for NO removal. The homogeneous distribution of the NCs and the well-developed interface in type II CsPbBr 3 /TiO 2 heterostructures play important roles for improving the separation and transfer of photogenerated charge carriers. The light response of the CsPbBr 3 NCs increased the harvesting efficiency of solar energy. In addition, the bright photoluminescence of the CsPbBr 3 NCs was almost quenched to further confirm the separation of the photogenerated charge carriers in the heterostructures. Using optimized preparation conditions, the CsPbBr 3 /TiO 2 composite sample revealed an outstanding NO removal rate of 77.9 % at a concentration of 300 ppb, in which 45.2 % of NO was removed using pure TBN. In addition, the CsPbBr 3 /TiO 2 sample revealed excellent performance for photocatalytic H 2 O 2 evolution rate of 104.3 µM∙L −1 ∙h −1 , suggesting the CsPbBr 3 /TiO 2 composite can be applied for various photocatalytic fields. These results supplied new insights for the synthesis of photocatalysts and application of perovskite NCs.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 29
·295705
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IF 3.874
Fangya Qi,Han Li,Fan Yang,Zhipeng Sun
An integrated electrode of core–shell coaxially structured NiCo2S4@TiO2 nanorod arrays/carbon cloth (NiCo2S4@TiO2@CC) have been fabricated, via a two-step hydrothermal method. Comprehensive structural and compositional analyzes are performed to understand the effects of the NiCo2S4 shell on the TiO2 core. Such core–shell arrays structure can significantly provide abundant electroactive sites for redox reactions, convenient ion transport paths, and favorable structure stability. The NiCo2S4@TiO2@CC electrode represents a splendid specific capacitance (650 F g−1 at 1 A g−1) and enhanced cycling stability (capacitance retention of 97% over 10 000 cycles at 5 A g−1). Additionally, the assembled NiCo2S4@TiO2@CC//CNT@CC solid-state asymmetric supercapacitors exhibit a maximal energy density of 0.6 mWh cm−3 at 32.4 W cm−3, and topping cycling stability (85% capacitance retention after 5000 cycles at 5 mA cm−2). The results demonstrate that the well-designed NiCo2S4@TiO2@CC presented in this work are applicable for the development of electrode materials in energy storage devices.
研究领域:
材料科学
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能源存储技术
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 15
·7070-7077
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IF 3.925
Zheng Lu,Wenxian Wei,Jingjing Yang,Qin Xu,Xiao-Ya Hu
A novel Ag triangle nanoparticles/TiO2 nanorod array (AgNTs/TNA) heterostructure was designed as a surface-enhanced Raman scattering (SERS) active substrate for the sensitive detection of Rhodamine 6G (R6G), Crystal Violet (CV), Malachite Green (MG) and Thiram in food samples. The heterostructure was constructed by simply stacking AgNTs and hydrothermally prepared rutile TNA together. On the surface of the heterostructure, the intensity of the Raman scattering intensity was about two times stronger compared with that on the AgNT substrate, using the R6G molecule as a probe. The AgNTs/TNA heterostructure could detect the SERS signal of R6G down to 10−10 M, showing excellent SERS performance. This platform has been successfully applied for the detection of CV and MG residues in crayfish. When irradiated with ultraviolet light, the SERS substrates can be cleaned and reused. This work demonstrated that the AgNTs/TNA metal–semiconductor heterostructure with high sensitivity, reproducibility and recyclability could provide an alternative reliable platform for food additive analysis.
研究领域:
材料科学
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分析化学
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食品安全
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Xinqi Chen,Wenjing Lv,Zhili Shi,Pujia Cheng,Kaidong Zhan,Yaqi Liu,Fan Wu,Quinn Qiao
The photovoltaic conversion of heterojunction solar cells relies on the interface properties between n-type and p-type semiconductors. N-type TiO 2 -nanoarray (NA), ferroelectric BiFeO 3 interlayer, and p-type BiOI were used to fabricate a ternary bulk heterojunction using a solution-based method in this study. Solid-state solar cells of FTO/TiO 2 -NA/BiFeO 3 /BiOI/spiro-OMeTAD/Ag are constructed for the first time, and their photo-electric conversion performance is studied. The addition of a BiFeO 3 interlayer at the interface between TiO 2 -NA and BiOI increased the solar cell open-circuit voltage ( V oc ) from 0.18 to 0.47 V and the short-circuit current ( J sc ) from 0.29 to 0.54 μA/cm 2 , resulting in a nearly 5-fold increase in power conversion efficiency. The Kelvin Probe force microscope analysis confirmed that the polarization electric-field ( E self ) generated by the BiFeO 3 interlayer is directed toward BiOI, thereby increasing the surface potential and decreasing electron and hole back flows between TiO 2 and BiOI. This additional electric field caused greater charge concentrations and a greater V oc . Furthermore, the E self directed toward the BiOI increased the built-in electric field ( E bi ) in the space charge area from TiO 2 to BiOI, allowing for greater separation of photogenerated electrons and holes and thus raising the J sc . The findings of this study suggested that manipulating internal electric fields via polarization could be an effective method for enhancing the performance of solar cells based on BiOI.
研究领域:
材料科学
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光伏技术
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纳米技术
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Ruoyu Li,Hongyu Zhang,Xiaohong Yao,Bin Tang,Paul K Chu,Xiangyu Zhang
The surface topography of implants plays a major role in osteogenesis and immunomodulation. In this study, three types of TiO 2 nanoarrays including nanorod arrays with a diameter of 45 nm (TiO 2 -N), nanorod arrays with a diameter of 60 nm (TiO 2 -N N), and nanocone arrays (TiO 2 -NW) are prepared on titanium and the behavior of bone marrow stromal cells (BMSCs) and polarization of macrophages are studied. Compared to the planar titanium control, TiO 2 nanoarrays facilitate osteogenesis of BMSCs and stimulate the pro-healing M2 phenotype. However, adhesion, spreading, proliferation, and osteogenic differentiation of BMSCs are more pronounced on TiO 2 -N N than both TiO 2 -N and TiO 2 -NW. TiO 2 -NN also produces the best immune microenvironment, while TiO 2 -NW is more favorable than TiO 2 -NN from the viewpoint of cell adhesion and spreading of osteoblasts.
研究领域:
生物材料
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组织工程
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生物医学工程
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细胞生物学
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免疫学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
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2023
·
IF 6.2
Xinsheng Tang,Hujun Zhang,Ruxangul Jamal,Abdukeyum Abdurexit,Nawrzhan Serkjan,Shuyue Xie,Yiming Liu,Tursun Abdiryim
A self-powered ultraviolet photodetector (UV PD) effectively utilizes UV energy and has attracted greatly attention due to its no consuming of any external power. In this work, TiO 2 nanoarrays (NRs) were synthesized by a one-step hydrothermal method, which was combined with P(TTh-co-EDOT) to realize a high-performance p-n heterojunction UV PD, and P(TTh-co-EDOT) was evaluated as the photosensitive layers in UV PDs for the first time. Furthermore, the working mechanism for the self-powered of UV PD was discussed in detail based on the energy band theory. Different electrochemical deposition cycles of TTh-co-EDOT on the surface of TiO 2 NRs were applied to form p-n heterojunction for achieving the optimum photoelectric performance. Among them, it was found that the optimum UV PD based on face-to-face fabrication of TiO 2 NRs and P(TTh-co-EDOT) from 3 deposition cycles exhibits an enhancement of photoelectric performance without applying any external voltage. Benefiting from the enhanced built-in electric field of the TiO 2 NRs/P(TTh-co-EDOT) interface, balancing photogenerated carriers and the charge separation and transport in self-power mode, the responsivity and detectivity of TiO 2 NRs/P(TTh-co-EDOT)-3C are 2.252 mA/W and 3.413 × 10 10 Jones, with the rise and fall times are 0.256/0.427 s, which exhibited excellent photoelectric properties and stability. TiO 2 NRs/P(TTh-co-EDOT)-1C has the lowest responsivity (0.0995 mA/W) and detectivity (6.035 × 10 9 Jones) and TiO 2 NRs/P(TTh-co-EDOT)-4C has the longest rise and fall times (0.460/0.451 s). These results suggest that the great potential of the TiO 2 NRs and P(TTh-co-EDOT) for high-performance UV PDs.
研究领域:
材料科学
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纳米技术
·
光电探测器
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Xinsheng Tang,Xiong Liu,Fangfei Liu,Tursun Abdiryim,Ruxangul Jamal,Nawrzhan Serkjan,Shuyue Xie,Cong Xue,Qian Cheng
Pyro-phototronic effect plays an important role in improving the photodetection performance of ultraviolet (UV) photodetectors (PDs). Here, a novel pyro-phototronic effect between TiO 2 nanoarrays (TiO 2 NRs) and the conducting polymer poly(3,4-ethylenedioxy selenophene) (PEDOS) is applied to fabricate a self-powered UV PD with the enhanced photodetection ability. The self-powered p-n heterojunction UV PD is fabricated by a face-to-face hybrid of acid (HCl and H 2 SO 4 )-treated TiO 2 NRs with PEDOS. Interestingly, a pyro-phototronic effect is found between TiO 2 NRs/FTO and PEDOS/FTO, and the acid treatment of TiO 2 NRs can dramatically enhance the pyro-phototronic effect. H 2 SO 4 treatment can improve the p-n heterojunction, while HCl treatment can increase carrier concentration due to the introduction of surface oxygen vacancies on the surface of TiO 2 NRs. Under UV light illumination and 0 bias voltage, the rise time (T rise ) and fall time (T fall ) of UV PD from the face-to-face hybrid of PEDOS/FTO with TiO 2 (HCl)/FTO are 0.080 s and 0.079 s, while the responsivity (R) and detectivity (D*) are 58.706 mA/W and 3.627 × 10 11 Jones, respectively. The face-to-face fabrication of UV PDs and the matching of the energy levels between PEDOS and TiO 2 NRs cause the pyro-phototronic effect due to temperature change and pyroelectric effect of TiO 2 NRs under the UV light illumination. This work gives a new idea to generate pyro-phototronic effect between TiO 2 NRs and conducting polymers for application in UV PDs field.
研究领域:
材料科学
·
光子学
·
纳米技术
·
电气工程
✓ 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）