SOLID STATE SCIENCES
·
2024
·
IF 3.4
Dong Yanping,Xiqiang Tian,Hongji Zhao,Jintao Luo
The fabrication of small Pd nanoparticles (NPs) anchored on titanium dioxide (TiO 2 ) supports remains a great challenge due to its high surface energy. Herein, flower-like three dimensional (3D) TiO 2 microstructures assembled from needle flakes are fabricated thru a facile evaporation-induced assisted hydrothermal method, and then modified with amines group (3D-TiO 2 -NH 2 ). Small and uniform dispersed Pd nanoparticles were anchored on the surface of 3D-TiO 2 -NH 2 supports using polyol reduction method. Remarkably, the obtained 3D-TiO 2 -NH 2 supported Pd-based catalyst (Pd@3D-TiO 2 -NH 2 ) demonstrated an optimal 4-NP catalytic hydrogenation efficiency ( k = 1.09 min −1 ), which is 1.56 and 3.52 times superior than that of the Pd@3D-TiO 2 ( k = 0.699 min −1 ) and Pd@TiO 2 –P25 ( k = 0.31 min −1 ) catalysts, respectively. In-depth investigation of the structure-property relationship by SEM, XRD, N 2 adsorption-desorption isotherm, TEM, XPS, CO chemisorption and CO-FTIR reveal that the optimal catalytic hydrogenation activity of Pd@3D-TiO 2 -NH 2 can be credited to its 3D hierarchical structure (interconnected needle flakes) and the amines group existing on the surface of flower-like three dimensional hierarchical TiO 2 , which control the Pd particles size (2.7 nm) and uniform dispersion (43.5%) to generate more surface active Pd 0 entities over Pd@3D-TiO 2 -NH 2 .
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Zhendong Yu,Suhang Xun,Meizan Jing,Haofeng Chen,Weiyu Song,Yanhong Chao,Mohammad Rahmani,Yuxiao Ding,Mingqing Hua,Jian Liu,Wenshuai Zhu
To prevent SO x emission and produce low-sulfur diesel oil, we develop a 3D assembly TiO 2 nanoflower catalyst with controllable oxygen vacancies for oxidative desulfurization (ODS) in diesel oil. The roles of oxygen vacancy (OV) and associated Ti 3+ in TiO 2 are fully discussed: the increased OV and Ti 3+ are beneficial for the promoted chemical adsorption of peroxy groups, from − 0.5 eV to − 1.26 eV; also facile to the reduction of the energy barriers of O-O and O-H bonds cleavage, respectively by 1.38 eV and 1.24 eV, thus greatly boosting the generation of hydroxyl radicals·OH and superoxide radicals·O 2 - . Besides, the ODS reaction undergoes two possible pathways, the mechanism and the kinetics are investigated. Above all, the 100% ODS rate can be obtained in only 30 min under optimal conditions, showing a promising perspective of oxygen vacancy engineering for converting hazardous sulfides into high-value chemicals.
研究领域:
材料科学
·
催化
·
环境化学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Chinese Physics B
·
2014
·Vol. 23
·期 9
·098104
·
IF 1.392
Li Ji-Jiao,Li Bo,Peng Qin-Mei,Zhou Ji， Li Long-Tu
Three groups of three-dimensional (3D) TiO2 woodpile electromagnetic gap materials with tailed rheological properties were developed for direct-written fabrication. Appropriate amount of polyethyleneimine (PEI) dispersants allow the preparation of TiO2 inks with a high solid content of 42 vol.%, which enables them to flow through the nozzles easily. The inks exhibit pseudoplastic behavior. The measured microwave characteristics of the results agree well with simulations based on plane wave expansion (PWE).
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·Vol. 13
·期 5
·118305
·
IF 7.2
Qian Xie,Zhengxin Cai,Yuxuan Wang,Jiajia Cai,Jianmin Wang,Shineng Sun
Photoelectrochemical cathodic protection (PCP) driven by solar energy represents a promising alternative to conventional corrosion protection methods. However, severe photocarrier recombination within the photoanode remains a major obstacle limiting PCP efficiency. Herein, a Z-scheme heterojunction composed of 3D TiO 2 nanotube arrays (T) and 2D ZnIn 2 S 4 (ZIS) nanoflowers was rationally constructed for the controllable growth and effective application in the PCP of Q235 steel. Benefiting from the Z-scheme charge transfer pathway, intimated interfacial contact, and broad UV–visible light absorption capability, the T/ZIS heterojunction exhibited significantly enhanced charge separation and transport efficiency. In the optimized configuration, the open-circuit potential under illumination (OCP L ) of T/ZIS-5 coupled with Q235 reached −1.07 V vs. SCE, accompanied by a photocurrent density of 240 μA/cm 2 , over 6-fold higher than that of bare T and superior to other reported photoanodes under similar conditions. This work highlights the important role of electrode design and interface engineering in optimizing PCP performance and provides valuable insights for the development of high-performance heterojunction-based photoelectrodes for solar-driven corrosion protection in marine environments.
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2018
·Vol. 165
·期 14
·D663
·
IF 3.662
Xue Bai,Kai Gao,Xin Huang,Caidie Qin,Yi Zhang,Xuan Han
Three-dimensional (3D) metal inorganics have gained tremendous interests for a series of applications. Here, we prepared TiO2 microspheres, urchin-like TiO2, and flower-like TiO2 by hydrothermal method. The morphologies of the three 3D TiO2 nanostructures were characterized by scanning electron microscopy and X-ray diffraction analyses. The electrochemical behaviors of the 3D TiO2 nanostructures were investigated by electrochemical impedance spectroscopy and cyclic voltammetry studies. Results showed that 3D TiO2-modified electrodes exhibited improved electrochemical performance compared with bare electrode. The three 3D nanostructures were then used with a modified glassy carbon electrode to detect dopamine (DA). According to the experimental results, the flower-like TiO2/GCE demonstrated excellent electrochemical performance than the two other electrodes. The enhanced electrochemical performance of the 3D flower-like TiO2/GCE is mainly affected by the structure of anatase crystal, which is the most important factor for the enhanced electrochemical performances toward DA detection. The flower-like TiO2/GCE, urchin-like TiO2/GCE, and TiO2 microspheres/GCE possessed linear ranges of 0.02–160, 1–180, and 1–160 μM, with limit of detection values of 0.007, 0.31, and 0.33 μM, respectively.
研究领域:
材料科学
·
电化学
·
分析化学
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2017
·Vol. 22
·期 2
·347-353
·
IF 2.316
Lan Zhang,Chen Xin,Zhang Sheng,Wu Jihuai
Three-dimensional TiO 2 hierarchical nanostructures (3D-TiO 2 -HNs) containing TiO 2 nanotrees and nest-like hollow spheres were synthesized and used as backbones for CdSe
x
S 1− x
quantum dot (QD) loading. These CdSe
x
S 1− x
QD-sensitized 3D-TiO 2 -HNs were then used as photoelectrodes in the preparation of quantum-dot-sensitized solar cells. As revealed by TEM images, the highly porous 3D-TiO 2 -HNs represent an excellent framework on which to deposit a large number of CdSe
x
S 1− x
QDs in order to form homogeneous and compact CdSe
x
S 1− x
-sensitized layers in photoelectrodes using a spin-assisted successive ionic layer adsorption and reaction method (spin-SILAR). Following careful adjustment of the molar ratio of Se 2− to S 2− , the number of spin-SILAR cycles, and the thickness of the CdS passivation layer used, the best-performing QDSC was shown to yield a short-circuit current density of 18.22 mA cm −2 , an open-circuit voltage of 0.520 V, a fill factor of 0.510, and a power conversion efficiency of 4.83%. This high performance is possible because the device is able to absorb a relatively broad range of wavelengths and because charge recombination is suppressed in the device.
研究领域:
材料科学
·
纳米技术
·
能源研究
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Yuanmei Xu,Wenbing Chen,Xueshi Li
Much attention has been focused on the fabrication of TiO 2 microspheres due to their excellent properties and attractive potential in many fields. Here, undoped 3D hierarchical TiO 2 microspheres (TMS) were synthesized in situ on Ti mesh using a hydrothermal method by varying NaOH concentration, reaction time and temperature. The 3D TMS grown along the surface of the woven wires of the Ti meshes, using the metal Ti meshes as a substrate, which resulted in improved conductivity. Meanwhile, the original Ti mesh with the macroporosity (due to the 15 % open area of the mesh) can act as fast proton mass diffusion. As a result, the flexible TMS-Ti photoelectrodes exhibit an excellent current density of 1.63 mA/cm 2 at a potential of 1.23 V (vs Ag/AgCl). Therefore, the in situ synthesis of TiO 2 microspheres on Ti mesh is highly desirable for flexible devices.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Materials Today Energy
·
2020
·
IF 5.604
J. Khan,N.U. Rahman,W.U. Khan,Y. Wang,S. Fu,G. Ahmed,M.N. Akhtar,M. Wu
In today's optoelectronic devices, particularly perovskite solar cells (PSCs), morphological engineering and microscopic architecture of metal oxide semiconducting materials are of great significance for enhanced charge collection, photonic structuring, and optical enhancement optimization. Herein, three-dimensional hollow TiO 2 sub-microspheres (3D-HTS) composed of anatase nanocrystals are synthesized using the hydrothermal method and used as a novel and efficient type of electron transport layer (ETL) for high-performance mesoscopic PSC. The TiO 2 sub–microsphere-based film features a 3D interconnected structure with tunable film thicknesses and pore sizes. The PSC based on such sub-microsphere films results in an outstanding power conversion efficiency (PCE) of 18.01% that is 28% greater than the TiO 2 nanoparticles (TNPs) ETL-based counterpart (PCE = 14.08%). The better efficiency of the sub–microsphere-made PSC device can be ascribed to the considerably improved charge collection, charge-transport, and light-harvesting capabilities. These valuable properties are because of the titania macropores that allow effective infiltration of the perovskite precursor for efficient light absorption, with reduced charge recombination and enhanced charge-transport through the sub-microspheres architecture. This work shows a practical and straightforward method for preparing 3D metal oxide–based electrodes for superior photovoltaic devices .
研究领域:
材料科学
·
能源工程
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Xiuyu Wang,Sijia Ren,Bingyan Shi,Liu Liu,Sam Toan,Xiaodong Wu,Sheng Cui,Xiaodong Shen
Developing efficient, stable, and low-cost photocatalysts for solar-driven CO 2 conversion is of great significance for sustainable energy. A flower-like NiAl-LDH structure with a particle size of about 3.0 μm, loaded with TiO 2 nanoparticles, is hydrothermally grown into a porous aerogel featuring an S-scheme heterojunction and an average pore diameter of approximately 13.0 nm. Under full-spectrum irradiation and without any CO-catalysts, the optimized aerogel achieves remarkably high CH 4 and CO production rates of 9.45 and 13.67 μmol·g −1 ·h −1 , representing 2.19- and 5.04-fold enhancements over pristine TiO 2 , respectively, along with excellent long-term cyclic stability. UV–vis diffuse reflectance spectroscopy and photoelectrochemical analysis clearly reveal that the S-scheme heterojunction enhances visible-light absorption and significantly prolongs the photogenerated carrier lifetime from 1.46 ns to 3.02 ns. Density functional theory calculations further reveal that compared to TiO 2 , NiAl-LDH exhibits a stronger CO 2 adsorption energy of −1.28 eV and induces significant structural deformation in the adsorbed CO 2 molecule. Band structure, electron paramagnetic resonance spectroscopy, and X-ray photoelectron spectroscopy consistently verify that before illumination, electrons spontaneously transfer from NiAl-LDH to TiO 2 , establishing a built-in electric field and inducing interfacial band bending. Upon illumination, this built-in field drives photogenerated electrons to transfer directionally from the conduction band of TiO 2 to the valence band of NiAl-LDH for recombination, thereby enabling efficient spatial charge separation and preserving high redox potentials. In situ infrared spectroscopy further reveals the CO 2 photoreduction pathway, thus supporting the proposed S-scheme-based multi-electron reduction mechanism for efficient solar fuel production
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产品关联
DOI
高影响因子
RARE METALS
·
2021
·Vol. 40
·期 11
·3215-3221
·
IF 4.003
Yu Juan,Meng Bi-Cheng,Wang Le-Jie,Wang Qi,Huang Wen-Long,Wang Xu-Yang,Fang Zhao
Three-dimensional (3D) thin-film electrodes are promising solution to the volume change of active materials in lithium-ion batteries. As a conductive current collector, the 3D TiO 2 nanotube array networks (TNAs) have a one-dimensional stable electronic conductive path and increase the adhesion between the current collector and raw material, thereby improving the cycle stability of active materials. In this study, a novel 3D-TNAs@Sb 2 S 3 anode was fabricated by directly depositing natural stibnite onto 3D TNAs. The adhesion of Sb 2 S 3 particles to the substrate was enhanced due to the large surface area provided by 3D-TNAs. Moreover, the porous layered structure composed of Sb 2 S 3 nanoparticles relieved the stress generated during lithiation and adapted to the volume change of Sb 2 S 3 during cycling. Therefore, the resulting composite anode exhibits high cycle and rate performance, reaching 0.36 mAh·cm −2 after 80 cycles at the galvanostatic rate of 1 mA·cm −2 , with high coulombic efficiency of 98%.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
薄膜技术
·
电池技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Hewei Si,Nengqian Pan,Xidong Zhang,Jianjun Liao,M.N. Rumyantseva,A.M. Gaskov,Shiwei Lin
Chemical oxygen demand (COD) is one of the most widely used parameters for water quality assessment. Quantification and detection of COD slight fluctuations is crucial for an early detection of abnormal change in the water environment. Here we report a real-time on-line photoelectrochemical method for sensitive COD detection using an extended-gate field-effect transistor (EGFET) sensor. The FET gate consists of a Ti mesh electrode with 3D TiO 2 nanotube arrays modified by Pt nanoparticles. The device shows a COD detection limit down to 0.12 mg/L and a wide dynamic linear range from 1.44 mg/L to 672 mg/L at a continuous flow rate of 1.0 mL/s. The method reported also displays excellent stability, accuracy and reproducibility. More importantly, real water samples analyses with the proposed method are in a good agreement with the standard dichromate method. The results suggest that the EGFET-based photoelectrochemical sensors are potential candidates for practical COD onsite measurement.
研究领域:
环境监测
·
传感器与仪器
·
电分析化学
·
水质检测
·
纳米材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）