Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 8
·4445-4452
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IF 7.443
Bingkun Liu,Yanjun Sun,Xuesong Wang,Lijing Zhang,Dejun Wang,Zewen Fu,Yanhong Lin,Tengfeng Xie
We report novel hierarchical three-dimensional (3D) TiO2 nanotube-branched rutile TiO2 nanorod arrays (H-TiO2 NRAs) on FTO substrates that serve as model architecture for efficient quantum dot-sensitized solar cells (QDSCs). The newly designed H-TiO2 NRA photoanode offers a large surface area for high QD loading with high light scattering properties. In the meantime, the presence of anatase–rutile heterojunction at the interface helps the rutile nanorods to efficiently collect photo-injected electrons from the anatase nanotubes, reducing electron recombination with the electrolyte and QDs. As a result, the H-TiO2 NRA photoanode with a thickness of only 1 μm, exhibits a solar energy conversion efficiency of 1.04%, which is 2.7 times higher than that found in the pristine nanorod array-based QDSCs, demonstrating the synergistic effect of rutile nanorods and anatase nanotubes for photoelectrochemical solar energy conversion.
研究领域:
材料科学
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能源科学
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纳米技术
✓ 已验证
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
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2019
·Vol. 9
·期 5
·407
·
IF 3.444
Bin Yang,Guoqiang Chen,Huiwen Tian,Lei Wen
In this study, oxygen vacancy modified TiO2nanorod array photoelectrode was prepared by reducing hydrogen atmosphere to increase its free charge carrier density. Subsequently, a p-type conductive poly 3,4-ethylenedioxythiophene (PEDOT) layer was deposited on the surface of oxygen vacancy modified TiO2, to inhibit the surface states. Meanwhile, a p-n heterojunction formed between PEDOT and TiO2to improve the separation of photo-induced carriers further. The photocurrent of TiO2nanorod array increased to nearly 0.9 mA/cm2after the co-modification under standard sunlight illumination, whose value is nearly nine times higher than that of pure TiO2nanorod array. Thus, this is a promising modification method for TiO2photoanode photoelectrochemical (PEC) performance improving.
研究领域:
材料科学
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光电化学
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纳米材料
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半导体物理
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能源材料
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表面改性
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Bowen Zhang,Zhiyong Zhao,Fangfang Yu,Diandian Chen,Fei Cheng,Hari Bala,Zhanying Zhang
The CsPbBr 3 perovskite solar cells (PSCs) based on carbon counter electrode (CCE) are promising because of the advantages including fabrication simplicity and excellent stability, but their power conversion efficiencies (PCE) are low due to interfacial carrier recombination as the direct contact of the CsPbBr 3 with electron transport materials (ETM). In this paper, PbTiO 3 shells were grown onto TiO 2 nanorods to form PbTiO 3 -coated TiO 2 scaffold layer via a two-step method. The presence of PbTiO 3 could promote crystallinity of the CsPbBr 3 perovskite film and inhibits interface recombination at the CsPbBr 3 /TiO 2 interface. Consequently, the carbon-based CsPbBr 3 solar cells with PbTiO 3 /TiO 2 scaffold layer achieves a high PCE of 7.28%, demonstrating an increase by 19.9% compared with the devices based on TiO 2 NRs. Moreover, the champion devices exhibited excellent stability in ambient air, with the PCE value remaining at 93% over 28 days.
研究领域:
材料科学
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太阳能
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2020
·
IF 3.421
Wanxian Cai,Yanqi Lv,Koucheng Chen,Zhaobin Zhang,Yuanzeng Jin,Xingfu Zhou
Recently, carbon-based all-inorganic perovskite solar cells (PSCs) caught the attention of photovoltaic researchers due to their remarkable stability. Herein, we report a carbon-based all-inorganic CsPbI2Br PSC using TiO2 nanorod arrays (TiO2 NRAs) as an electron transporting layer. The method of using TiO2 NRAs as an electron pathway has the advantage of increasing the electron–hole separation effectively and enables a thicker active perovskite layer to obtain a stronger absorbance. In addition, a water–alcohol soluble CsCl was used to modify the interface between TiO2 NRAs and the CsPbI2Br active layer to reduce interfacial recombination of charge carriers in the cells, and the CsCl interface-modified device showed a 10.6% increase in the open-circuit voltage. An optimized power conversion efficiency of 11.45% has been obtained, which is one of the superior performances reported for the carbon-based pure CsPbI2Br PSCs to date.
研究领域:
材料科学
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能源研究
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光伏技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Guanyu Liu,Huiyun Xia,Wenshuo Zhang,Lei Lang,Haipeng Geng,Lifang Song,Yanhui Niu
In recent years, superamphiphobic coatings have been widely used in industrial transportation and environmental treatments because of their unique liquid repellency. In this study, WO3-TiO2 nanorods/SiO2 were used as the constructor of surface microstructures, and 1H,1H,2H,2H-perfluorodecyltriethoxysilane was used as the provider of low surface energy, and a photocatalytic superamphiphobic coating (FTS coating) was prepared. The microstructure and chemical composition of the coating was characterized by scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), Fourier-transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). The coating exhibited excellent photocatalytic activity toward degradation methyl red and nitric oxide (NO), and the degradation efficiency to NO reached 47.8%. Also, the advanced contact angle and the hysteresis angle of water, glycol, glycerol, and olive oil was used to evaluate the superamphiphobicity. After 7 days of ultraviolet (UV) aging, five cycles of airbrush flushing and 48 h of immersion in acid, salt, and alkali solutions, the FTS coating still exhibits excellent amphiphobicity, which lays a foundation for its large-scale applications in the concrete exterior wall. The surface microstructure and the formation of air pockets are a prerequisite for superamphiphobicity, which promotes the liquid on the coating surface into the Cassie-Baxter state. Furthermore, the formation of air pockets is closely related to the gas adsorption capacity and the specific surface area (SBET) of the surface microstructure on the coating surface. The coatings with different SBET constructed and the advanced contact angle were measured. The influence of air pockets on the superamphiphobicity of coatings was studied in combination with the optical microscope. The understanding that SBET further influences superamphiphobicity by affecting the surface air pockets is proposed.
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
PubMed
高影响因子
VACUUM
·
2023
·
IF 4
Zihan Wang,Xiaoqing Ma,Qiaodan Li,Xinyao Tian,Jilei Si,Mauricio A. Melo
Photoelectrochemical (PEC) water splitting is a viable method for converting renewable solar energy into storable chemical energy. Herein, the newly emerged two-dimensional sp- and sp 2 -carbon hybridized graphyne sheets were successfully coupled with thin film-like arrays of titanium dioxide nanorods , forming an efficient 2D-1D heterojunction . The microstructure and composition of obtained γ-graphyne/TiO 2 films were well characterized. And enhanced photoelectrochemical properties were demonstrated. The γ-graphyne/TiO 2 photoelectrode achieves a photocurrent density of 1.31 mA/cm 2 at 1.23 V ( vs. RHE), which is 1.7 times over that of pristine titanium dioxide. An improvement of photoconversion efficiency by 2.2 folds was observed. The high PEC activity of γ-graphyne/TiO 2 originates from band alignment and interfacial junction between π-conjugated graphyne sheets and TiO 2 nanostructure , greatly promoting charge transfer and diminishing defective excitation and recombination. By virtue of the γ-graphyne nanosheets , largely increased number of useful photons and catalytic active sites are triggered. This work provides a reference for the photoelectrochemical application of semiconductive γ-graphyne and a specific and proven method for the utilization of solar energy.
研究领域:
材料科学
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纳米技术
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可再生能源
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光化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2021
·
IF 3.171
Yingzhen Zhang,Yonggang Lei,Tianxue Zhu,Zengxing Li,Shen Xu,Jianying Huang,Xiao Li,Weilong Cai,Yuekun Lai,Xiaojun Bao
Exploring efficient and stable photoanode materials is a necessary link to realize the practical application of solar-driven photoelectrochemical (PEC) water splitting. Hence, we prepared rutile TiO 2 nanorods , with a width of 50 nm, which was growth in situ on carbon cloth (TiO 2 @CC) by hydrothermal reaction. And then, Ag nanoparticles (NPs) and biomass N,S-C NPs were chosen for the additional modification of the fabricated TiO 2 nanorods to produce broccoli-like Ag-N,S-C/TiO 2 @CC nanocomposites . According to the result of ultraviolet–visible diffuse reflectance spectroscopy (UV–vis) and PEC water splitting performance tests, Ag-N,S-C/TiO 2 @CC broadens the absorption region of TiO 2 @CC from the ultraviolet region to the visible region. Under AM 1.5G solar light irradiation, the photocurrent density of Ag-N,S-C/TiO 2 @CC is 89.8 μA·cm −2 , which is 11.8 times higher than TiO 2 @CC. Under visible light irradiation, the photocurrent density of Ag-N,S-C/TiO 2 @CC reaches to 12.6 μA·cm −2 , which is 21.0 times higher than TiO 2 @CC. Moreover, Ag-N,S-C/TiO 2 @CC shows a photocurrent responses in full pH range. It can be found that Ag NPs and N, S-C NPs play key roles in broaden the absorption range of TiO 2 nanorods to the visible light region and, promote the occurrence of PEC water oxidation reaction due to the surface plasmon resonance effect of Ag NPs and the synergistic effect of N,S-C NPs. The mechanism demonstrated that Ag-N,S-C/TiO 2 @CC can separate the photogenerated electron-hole pairs effectively and transfer the photogenerated electrons to the photocathode (Pt plate) in time. This research provides a new strategy for exploration surface plasma metal coupled biomass carbon materials in the field of PEC water splitting.
研究领域:
材料科学
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能源转换技术
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光催化
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2017
·
IF 4.95
Jie Wei,Aori Qileng,Yun Yan,Hongtao Lei,Shengsen Zhang,Weipeng Liu,Yingju Liu
An ultrasensitive photoelectrochemical (PEC) immunoassay based on multiple signal amplification strategy was fabricated for the detection of microcystin-LR (MC-LR). The CdS/TiO 2 nanorod arrays (CdS/TiO 2 NRAs) modified FTO electrode, which can weaken the self-oxidation by photogenerated holes of CdS nanoparticles , and limit the recombination of electron-hole pairs and broaden optical absorption of TiO 2 NRAs, was used as a visible-light driven material to immobilize antigens. Then, Fe 3 O 4 nanoparticles/polydopamine (Fe 3 O 4 @PDA) was used as the carrier to load secondary antibody (Ab 2 ) and horseradish peroxidase (HRP), where Fe 3 O 4 nanoparticles and HRP can synergistically accelerate the oxidation of 4-chloro-1-naphthol (4-CN) by H 2 O 2 to produce biocatalytic precipitation (BCP) on the surface of modified electrode . Due to the catalytic activity of Fe 3 O 4 nanoparticles and HRP, the nonproductive absorption of HRP and the steric hindrance by BCP, the photocurrent change was amplified. The proposed PEC immunosensor can detect MC-LR in a range of 0.005–500 μg/L with a detection limit of 0.001 μg/L. Meanwhile, the PEC immunosensor exhibited high sensitivity, good stability, acceptable selectivity and reproducibility, indicating its potential application in environmental monitoring.
研究领域:
环境科学
·
分析化学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Experimental Nanoscience
·
2021
·
IF 3.075
Zhiwei Pan,Xinru Zhu,Hong Jiang,Yefei Liu,Rizhi Chen
Flexible and hierarchical nanostructured Pd/SiO2-TiO2 nanofibrous catalytic membranes were fabricated via combining electrospinning technique and a two-step hydrothermal method. The size and distribution of TiO2 nanorods immobilised on SiO2 nanofibrous membranes can be regulated via adjusting the dosage of TiCl3 solution in the first step hydrothermal process. When using an optimal TiCl3 solution dosage of 0.2 mL, a hierarchical structured Pd/SiO2-TiO2-0.2 nanofibrous catalytic membrane with uniformly dense TiO2 nanorods loaded on SiO2 nanofibers is obtained, and still shows good tensile strength and flexibility. The catalytic activity of Pd/SiO2-TiO2-0.2 increases 5 times as compared to Pd/SiO2-TiO2-0 in the reduction of p-nitrophenol (PNP) to p-aminophenol (PAP). The modification with TiO2 nanorods can provide more surface areas for loading the Pd nanoparticles, thereby increased active sites. The three-dimensional open-cell network stacked and assembled by thousands of SiO2 nanofibers and TiO2 nanorods enhances the contact between the reactants and Pd nanoparticles. Both aspects contribute the superior catalytic activity of Pd/SiO2-TiO2-0.2. Furthermore, a continuous and complete conversion of PNP to PAP can be stably operated over 240 min in a gravity-driven catalytic membrane reactor constructed by Pd/SiO2-TiO2-0.2.
研究领域:
材料科学
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催化
·
纳米技术
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 24
·16559-16566
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IF 3.9
Zhenkai Ji,Min Sun,Tiantian Chen,Xinyi Shen,Xiuzhen Xu,Yan Zhong,Dadong Wang,Jiwei Ma,Bo Chen,Zhiguo Yi,Xiaobin Xu
Herein, we report a facile method combining top-down patterning transfer and bottom-up nanorod growth for preparing large-area and ordered TiO2 nanorod arrays. Pre-crystallization seeding was patterned with nanostructured morphologies via interfacial tension-driven precursor solution scattering on various types and period templates. This is a widely applicable strategy for capillary force-driven interfacial patterns, which also shows great operability in complex substrate morphologies with multiple-angle mixing. Moreover, the customized patterned lithographic templates containing English words, Arabic numerals, and Chinese characters are used to verify the applicability and controllability of this hybrid method. In general, our work provides a versatile strategy for the low-cost and facile preparation of hydrothermally growable metal oxide (e.g., ZnO and MnO2) nanostructures with potential applications in the fields of microelectronic devices, photoelectric devices, energy storage, and photocatalysis.
研究领域:
材料科学
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纳米技术
·
微电子学
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光电学
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能源存储
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光催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2018
·
IF 2.21
Meng Li,Zipeng Xing,Jiaojiao Jiang,Zhenzi Li,Junyan Kuang,Junwei Yin,Ning Wan,Qi Zhu,Wei Zhou
In-situ Ti 3+ /S doped high thermostable anatase TiO 2 nanorods using ethanediamine-modified TiOSO 4 as precursor are synthesized under 700 °C calcination , then combined with controllable in-situ solid-phase reaction method, calcined at 350 °C in argon. The outcomes declare that the obtained photocatalyst with a high crystallinity is effectively doped with S element and Ti 3+ species, and synchronously possesses one-dimensional (1D) anatase nanorods structure with length of ∼ 2–5 μm and width of ∼0.5–1 μm. The S and Ti 3+ co-doped 1D nanorod with a narrowed bandgap (2.56 eV) stretches the optical response range to visible-light. The visible-light-driven photocatalytic degradation efficiency of methyl orange and H 2 production rate for Ti 3+ /S-TiO 2 nanorods are as high as 96% and 166 μmol h −1 g −1 , showing about 6 times greater than 600-TR (TiO 2 nanorods). This is be ascribed to the synergistic reaction of S and Ti 3+ species co-doping narrows the bandgap and promotes the separation efficiency of photoexcited carriers, and the one-dimensional structure favors the transportation of photogenerated charge carriers. Hence, the prepared photocatalyst will have a great latent application prospect in fields of energy and environment.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 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）