JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2019
·Vol. 23
·期 11
·3031-3041
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IF 2.531
Deng Yafeng,Ma Zhanhong,Ren Fengzhang,Wang Guangxin
In spite of the TiO 2 compact layer (TCL) being widely used, it still needs more study. This paper took Ni-doped TCLs as the research target, using an innovative two-step method perfectly prepared Ni-doped TCLs with different thicknesses. And then on the basis of Ni-doped TCLs, the TiO 2 nanorod array (TNA) films were successfully prepared. The effects of Ni-doped TCLs with different thicknesses on the morphology, structure, and photoelectric performance of TNA films were investigated. The results indicated that Ni-doped TCLs with appropriate thickness can significantly improve performance of TNA films and obtain satisfactory PCE stability with time. Compared with the TNA films based on Ni:TCL5, Ni:TCL10, and Ni:TCL30, the TNA film with Ni:TCL20 exhibited better comprehensive photoelectric performance, the DSSCs based on this TNA film achieved the highest J sc (10.191 mA cm −2 ), V oc (0.574 V), PCE (4.42%), and the most excellent PCE stability with time.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Lin Li,Dawei Tang,Yongchen Song,Bo Jiang
Optofluidic microreactors are promising platform for photocatalytic reactions. However, the light transmission phenomenon is serious in optofluidic microreactors which makes a part of solar energy lose in surroundings. To resolve this problem, in this work, a novel dual-film optofluidic microreactor is proposed and fabricated by immobilizing TiO 2 nanorod arrays on both the top and bottom internal wall of the microchamber. Such dual-film structure enables the transmitted light to be utilized by the bottom TiO 2 film instead of being wasted, thus improving the light-harvesting capacity of optofluidic microreactor. Moreover, TiO 2 nanorod arrays are employed as the photocatalytic film in this optofluidic microreactor to enlarge the specific surface area and facilitate the mass transfer. The photocatalytic performance and the kinetic properties of the dual-film optofluidic microreactor are evaluated by photocatalytic degradation of methylene blue. Results show that the proposed dual-film optofluidic microreactor yielded much higher degradation efficiency than the conventional one as a result of enhanced light-harvesting and improved mass transfer. In addition, the long-term testing proves that the durability of the dual-film optofluidic microreactor can be improved by operating it in a periodically rotated manner. In short, the TiO 2 nanorod arrays-based dual-film optofluidic microreactor exhibits efficient light-harvesting and high durability and shows promising potential for photocatalytic applications.
研究领域:
化学工程
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材料科学
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2017
·Vol. 164
·期 13
·H863
·
IF 3.259
Xingzhi Wang,Zhuang Wang,Xishun Jiang,Miao Zhang,Yanfen Wang,Jianguo Lv,Gang He,Zhaoqi Sun
Highly ordered TiO2 nanorod (TNR) arrays decorated with Cu2ZnSnS4 (CZTS) nanocrystals were prepared via a facile and effective method. The TNR arrays were synthesized using a hydrothermal treatment, and the CZTS nanocrystals were deposited by a three-step successive ionic layer adsorption and reaction (SILAR) technique followed by annealing in a sulfur atmosphere. The morphology, structure, composition, optical, and the photoelectrochemical (PEC) properties of the CZTS/TNR arrays were investigated in detail. The results demonstrate that the CZTS/TNR arrays can effectively facilitate photoinduced carrier transport, reduce the recombination rate of electron-hole pairs, and as a result demonstrate improved light absorption properties and PEC performance. The CZTS/TNR arrays sensitized with 7 SILAR cycles showed a maximal photocurrent density of 2.17 mA/cm2 at 0 V and the longest electron lifetime of 47.39 ms, which is nearly 80 and 2.03 times higher than those of pure TNR, respectively. The improvement in performance can be attributed to the high absorption coefficient and narrow bandgap of CZTS and the type-II nanoheterostructures with a staggered alignment of band edges present at the heterointerface. Surface passivation with ZnS resulted in a further improvement in PEC performance in comparison to the untreated CZTS/TNR arrays with values of 2.53 mA/cm2 and 59.77 ms for the maximal photocurrent density and longest electron lifetime, respectively.
研究领域:
材料科学
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纳米技术
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光电化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 22
·13325-13330
·
IF 3.108
Zhenlong Zhang,Junfeng Li,Xiaoli Wang,Jianqing Qin,Wenjia Shi,Yuefeng Liu,Huiping Gao,Yanli Mao
In this paper, Zr and N co-doped TiO2 (Zr/N–TiO2) nanorod arrays were synthesized using a hydrothermal method and perovskite solar cells were fabricated using them as an electron transfer layer. The solar cells based on Zr/N–TiO2 presented an enhanced performance compared with those based on un-doped TiO2. The solar cell performance was optimized by changing the Zr doping content. The efficiency of solar cells based on Zr/N–TiO2 with a Zr doping content of 1% (Zr/Ti, atomic ratio) has been achieved at 12.6%, which was 31.6% higher than that of solar cells based on un-doped TiO2. To get an insight into the enhancement, some investigations were carried out. The results indicate that the larger open voltage (Voc) could be due to the larger conduction band offset resulting from the smaller energy band gap for Zr/N–TiO2, and the enlarged short current (Isc) could be attributed to the faster electron transfer and reduced recombination rate for Zr/N–TiO2 NRs. These induce the enhancement of solar cell efficiency.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICS COMMUNICATIONS
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2016
·
IF 1.48
Xin Chen,Zhang Lan,Sheng Zhang,Jihuai Wu,Jingfang Zhang
High performance CdS sensitized TiO 2 nanorod arrays based solar cells are fabricated by polymer-assisted layer-by-layer adsorption and reaction (PA-LBLAR) method. The PA-LBLAR method can well control the deposited size of CdS on the TiO 2 nanorod arrays, which are grown on Ti foils by hydrothermal route then transferred to transparent conductive glasses. The UV–vis absorption spectra show that with the increasing deposition times, the absorption spectra of photoelectrodes increased to a broader wavelength range, which is originated by the better coverage and increased size of CdS quantum dots on the TiO 2 nanorod arrays as detected by SEM and TEM images. The highest power conversion efficiency of the cells (AM 1.5 G, 100 mWcm −2 ) up to 2.944% can be obtained with 7 cycles of PA-LBLAR deposition of CdS sensitized layers in the photoelectrodes, which is much higher than that of the best performance of cell with 14 cycles of traditional successive ionic layer adsorption and reaction processes.
研究领域:
材料科学
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纳米技术
·
能源科学
✓ 已验证
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2025
·
IF 9.7
Huaxing Li,Chunyang Ma,Fafeng Xia,Zhongmin Xiao
To address the growing need for high-performing and stable energy storage devices, optimizing the durability and structure of supercapacitor electrodes is crucial. Traditional electrodes frequently face challenges in achieving an optimal balance between electrochemical capacity and structural stability. This study presents the synthesis of TiO 2 /CC@C array electrodes through ultrasonic disorder-induced deposition (UDID), specifically for high-performing supercapacitor applications. The impact of different ultrasonic power levels (50–200 W) on the electrodes’ structural and electrochemical properties was systematically examined. SEM analysis indicated that the sample prepared at 150 W showed an optimal, densely packed array of TiO 2 nanorods with improved surface uniformity, facilitating efficient ion transport. The 150 W TiO 2 /CC@C sample displayed a 46.73 m 2 /g specific surface area and a mean pore diameter of 9.35 nm, contributing to improved charge storage capacity. Raman spectroscopic analysis further confirmed the successful synthesis of the TiO 2 /CC@C composite, revealing distinct TiO 2 and carbon-related peaks. Electrochemical measurements showed that this electrode attained a specific capacitance of 687.3F/g at a scan rate equal to 5 mV/s. The system delivered an energy density equal to 158.4 Wh/kg at a power density of 20 W/kg when assembled as an asymmetric supercapacitor (ASC) with AC as the positive electrode. Furthermore, after 10,000 cycles, it maintained 86.3 % of its initial capacitance demonstrating outstanding cycling stability. These findings indicate that optimizing ultrasonic power to 150 W significantly improves both the structural and electrochemical performance of TiO 2 /CC@C, making it a promising candidate for advanced supercapacitor applications.
研究领域:
材料科学
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能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2019
·Vol. 102
·期 10
·5966-5975
·
IF 3.094
Haocheng Yang,Jinjun Chen,Yong Zuo,Miao Zhang,Gang He,Zhaoqi Sun
In this study, TiO 2 nanorod arrays (TNR), Ag quantum dots (QDs) sensitized with TNR TiO 2 /Ag, bismuth oxyhalide (BiOI) nanosheets, and Ag QDs co-modified with TNR and TiO 2 /BiOI/Ag (TBA) were prepared by a stepwise process. The morphological, structural, compositional, optical, photocatalytic (PC), and photoelectrochemical (PEC) properties of the samples were investigated. The TBA-2 sample exhibited the highest photocurrent density (281.8 μA/cm 2 ) and photodegradation efficiency (93.3%), with values 9.7 times and 2.25 times higher than those for TNR, respectively. The improvement in sample performance can be attributed to the formation of a heterojunction between BiOI and TiO 2 , thereby enhancing the absorption of visible light and improving the charge separation efficiency; Ag QDs limit interfacial electron-hole pair recombination. The experimental results show that TBA can effectively promote light-induced carrier transport and visible light absorption, while inhibiting the recombination rate of the electron-hole pairs, PEC, and PC.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Rui Li,Xiangtao Huo,Xing Han,Zhipeng Wang,Mei Zhang,Min Guo
Reducing defect density and hindering charge recombination in perovskite film and at perovskite/semiconductor interface are crucial to perovskite solar cells (PSCs) performance. In this paper, hydrothermally prepared TiO 2 nanorod arrays (TNRAs) were coated with Nb 2 O 5 layer using a spin-coating method, and the modified TNRAs were used as scaffold for the deposition of perovskite films and corresponding PSCs in air environment. The effect of NbCl 5 concentration on the micro structure and photovoltaic properties of the formed perovskite films were investigated, and the enhancement mechanism was also elucidated. A champion efficiency of 16.50% (enhanced of 9.49% compared with the pristine one) was achieved when the concentration of NbCl 5 solution was 0.005 M. Such an enhanced performance of PSC might be mainly ascribed to two reasons: one was the improved perovskite film qualities including the enlarged average grain size, higher crystallinity and reduced defect density; the other was the formed energy barrier (Nb 2 O 5 ) between perovskite layer and TNRAs interface that hindered the charge recombination.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Sainan Zhang,Ying Liu,Min Feng,Bowen Zhang,Tongtong Yu,Shiwei Xu,Guoyun Sun,Daoai Wang
In this study, a new photoelectrochemical material is fabricated by loading two-dimensional leaf-like Ti 3 C 2 MXene nanosheets into the TiO 2 nanorod array to form Ti 3 C 2 nanosheets/TiO 2 nanorod (Ti 3 C 2 /TiO 2 NR) composite photoanode materials. The unique two-dimensional/one-dimensional (2D/1D) composite photocatalytic materials enhance the photoelectrochemical water splitting performance under simulated solar light (100 mW cm −2 ) and yield a high photocurrent density of 1.41 mA cm −2 at 1.23 V vs . reversible hydrogen electrode (V vs. RHE ) and photoconversion efficiency of 0.46% at 0.78 V vs. RHE , which are almost 3.13 and 5.82 times higher, respectively, than those of the pure rutile TiO 2 NRs. The enhanced photoelectrochemical performances are attributed to the photogenerated electrons produced by TiO 2 NR which could be quickly transported by Ti 3 C 2 nanosheets due to their good electrical conductivity and increased specific surface area, which improve the separation efficiency of electrons and holes. These Ti 3 C 2 /TiO 2 NR, as new photocatalytic materials, have promising potential applications in the fields of photoelectrochemical water splitting, solar cells, and other photocatalytic devices.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2020
·
IF 8.758
Enzhu Lin,Ni Qin,Jiang Wu,Baowei Yuan,Zihan Kang,Dinghua Bao
Powder-form piezocatalysts suffer from poor recyclability and pose a potential threat of creating serious secondary pollution, which restrict their practical applications. Thin-film piezocatalysts, which not only exhibit good recyclability but also fully contact with solution, are believed to be one of the solutions to address these problems. In this work, the nanostructured BaTiO3 (BTO) thin films were fabricated by a facile hydrothermal method for their potential applications in piezocatalysis. The vertically standing BTO nanosheets grown on the top of TiO2 nanorod arrays exhibited superior piezocatalytic performance as well as piezo-electrochemical property. Given the different strain states between thin-film piezocatalyst and powder-form piezocatalyst, both the impact force of water and isostatic pressure are taken into consideration in finite element method (FEM) simulation. The FEM simulation shows that a stronger piezoelectric filed can be built in BTO nanosheets because of their easier deformation, and thus can lead to a higher piezocatalytic degradation efficiency. Our work presented here is expected to provide a potential route for the nanoengineering of thin-film piezocatalysts and clarify the catalytic mechanism for substrate-fixed piezocatalysts.
研究领域:
材料科学
·
环境科学
·
催化化学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Bowen Zhang,Chongyang Wang,Saisai Zhang,Xiangli An,Zhiyong Zhao,Hari Bala,Zhanying Zhang
In this work, highly regular TiO 2 array films consisting of nanorods with a diameter of ∼119 nm were grown on FTO via a facile hydrothermal method. Then Pt nanoparticles with a size of ∼5 nm were modified on the surface of TiO 2 nanorods via an in-situ reduction process. The gas-sensing performances of pristine TiO 2 and Pt-modified TiO 2 samples were systematically tested. The introduction of Pt nanoparticles could enhance the response and stability toward CO gas and decrease the optimal operating temperature from 400 °C to 360 °C. And the Pt/TiO 2 -based sensor with a Pt content of 1.5 wt% exhibits the maximum CO sensitivity. Furthermore, the adsorption energies of Pt-modified or Pt-doped TiO 2 for CO molecules were calculated using first-principles calculations. The chemical sensitivity of Pt to CO molecules may be responsible for the improved CO sensitivity. Additionally, the unique nanorod array structure of Pt/TiO 2 and the nano-Schottky junction generated between them are helpful in enhancing the gas-sensing property.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Yong Zuo,Jinjun Chen,Haocheng Yang,Miao Zhang,Yanfen Wang,Gang He,Zhaoqi Sun
In this paper, highly ordered titanium dioxide nanorod (TNR) arrays decorated with Ag-Ag 2 S quantum-dots (QDs) were synthesized on FTO substrate through hydrothermal treatment and in-situ vulcanization . The content of Ag 2 S QDs on Ag/TNR was controlled by changing the immersion time of Ag/TNR in the N-N-dimethyl formamide (DMF) solution containing dissolved sulfur element. The morphology, structure, composition and optical, photoelectric and photocatalytic properties of QDs/TNR arrays were studied in detail. In the visible range, the QDs/TNR array with a soaking time of 12 h exhibits the maximal photocurrent density (0.082 mA/cm 2 ) and photodegradation rate (62.2%), which is 5.5 and 1.85 times higher than that of pure TNR. The improvement of these properties could be attributed to synergy effect between Ag and Ag 2 S materials. That is, Ag QDs can stably capture and transmit photo-generated electrons from the TNR surface, whereas the Ag 2 S promoter is regarded as the interface active sites to enhance photocatalytic reactions. Therefore, the synergistic effect of Ag-Ag 2 S can significantly enhance the photoelectrochemical and photocatalytic properties of the TNR arrays.
研究领域:
材料科学
·
环境科学
✓ 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）