APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
He Wang,Huan Liu,Shulan Wang,Li Li,Xuan Liu
TiO 2 /C nanocomposites with hierarchical porous framework were synthesized by the dual-templation method with ice and silica as the hard template. Silica of different dimensions was used as the knob to modify the TiO 2 /C pore structure and to control anatase-rutile transformation. The prepared TiO 2 /C nanocomposites with pores at three different scales with micro-, meso - and macro-pores not only prohibited aggregation of nanoparticles but also shortened the transportation distance of charge carriers. TiO 2 /C fabricated with 22 nm colloid silica as the template showed superior photocatalytic performances of 4.0 and 10.7 times of the commercial benchmark P25 under UV and visible light irradiation, respectively. The TiO 2 /C composites also showed excellent photoelectrochemical (PEC) performances with the photocurrent density of 6.3 mA/cm 2 that is 11.2 times of the control sample. The results demonstrated that the silica dimension serves a significant role for optimization of the TiO 2 /C microstructure including particle size, phase composition, surface area and thus improvement in photoelectrochemical and photocatalytic properties.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Qiaona Liu,Xin Han,An Qian,Jiayu Qian,Xin Pu,Lei Ye,Jinshan Zhan,Jian Zhang,Qiang Yang,Jichang Liu
Building heterojunctions and exposing more catalytic active sites are effective strategies to enhance the photocatalytic hydrogen evolution activity. Herein, TiO 2 nanosheets are oxidized in situ on Ru-loaded MXene as carriers and subsequently loaded with uniform 2D CdS via hydrothermal method to obtain 2D Ru/Ti 3 C 2 -TiO 2 /CdS composite photocatalysts that integrate heterojunctions and cocatalysts. The formation of heterojunction between CdS and TiO 2 is conducive to promoting the separation and transfer of photogenerated charges, simultaneously, Ru/Ti 3 C 2 with the fully exposed Ru and Ti 3 C 2 can act as effective active sites of photocatalytic hydrogen production reaction. The composite photocatalyst exhibits an improved hydrogen production rate with 5479 µmol g −1 h −1 , which is 5, 3, and four times more than that of pristine CdS, CdS loaded Ti 3 C 2 -TiO 2 and CdS loaded Ru-TiO 2 respectively. The results reveal that the notable enhancement in performance can primarily be ascribed to the introduction of the TiO 2 /CdS heterojunction and the efficient cocatalysts of Ru/Ti 3 C 2 . Moreover, the 2D Ti 3 C 2 with high conductivity as carriers can increase charge transfer, and its 2D structure can serve as a template for growing 2D photocatalysts with higher activity. The interface engineering with multiple interfaces can offer novel insights for the advancement of efficient hydrogen evolution reaction catalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Chao Yang,Xueying Zhao,Yunlong Zhao,Chenchen Ji,Ronglan Wu,Lu Wang,Xueqing Shao
CuO x -decorated TiO 2 (CuO x /TiO 2 ) nanoparticles have been prepared by the pyrolysis of Cu(II) complex on TiO 2 in an oxygen-limited atmosphere. A solution phase deposition method combined with freeze drying was employed for depositing the 2-methylimidazole-Cu(II) complex onto TiO 2 nanoparticles . The effect of decoration of CuO x on TiO 2 nanoparticles in terms of the crystal phase, morphology, chemical compositions , surface area , surface elemental states, optical absorption and emission properties, was investigated using a series of characterization tools. The oxygen-limited pyrolysis of 2-methylimidazole resulted in the reduction of partial Ti 4+ and Cu 2+ ions into Ti 3+ , Cu + and Cu 0 species, respectively. The surface decoration of CuO x was found to improve the separation and migration of photogenerated electron-hole pairs and increase the life time of excitons. Furthermore, the photocatalytic performance of CuO x /TiO 2 nanoparticles was evaluated for hydrogen evolution in aqueous methanol solution under UV–visible light irradiation . The CuO x /TiO 2 photocatalyst with the optimal cocatalyst loading achieved hydrogen evolution rate of 4.34 mmol h −1 g −1 , with 71- and 5.5-fold enhancement in activity over neat TiO 2 and CuO x /P25, respectively. It is expected that the combination of deposition and pyrolysis of 2-methylimidazole-Cu(II) complex could be an effective approach for the decoration of Cu and its oxides on other supports.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zijin Pang,Degang Li,Xinru Wang,Xin Huang,Yu-Shi He,Weimin Zhang,Lipeng Zhang
The electrocatalytic dichlorination (EHDC) shows a promising potential to degrade chlorinated phenols (CPs). It is also a green technology in reducing the corresponding hazardous impact on the environment. In this study, we constructed a catalytic structure which was Pd on a TiO 2 array with oxygen vacancies on carbon fibre paper substrate (Pd/TiO 2 /CFP) by a relatively mild route. Due to the presence of the oxygen vacancies, the resulting strong metal-support interaction (SMSI) effect has been identified which featured a redistribution of spatial charge in Pd/TiO 2 . The electron flow from the oxygen vacancies in the TiO 2 to Pd facilitated the adsorption of Pd with 4-chlorophenol (4-CP) and endowed the Pd metal with an improved chemical reaction kinetics even at a low Pd loading. Experimentally, we studied the dependence of pH, concentration of 4-CP, and working potential on the reaction conditions of EHDC. The results showed that the conversion of 4-CP reached 100 % within 180 min with an apparent rate constant of 2.9 × 10 -2 min −1 and the dominant product was phenol (P). The multi-cycle test illustrated that the Pd/TiO 2 /CFP electrode showed superior stability. The results also revealed that the comprehensive catalytic behavior was much better than those of the Pd/CFP and the TiO 2 /CFP electrodes. The density function theory (DFT) calculations indicated that 4-CP was more preferably absorbed on Pd/TiO 2 /CFP than Pd/CFP due to the SMSI assistance. This study provides a valuable guide in the preparation of precious metal-based electrodes for EHDC with a reduced loading and cost but without performance compromise.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Yang Lei,Lu Lin,Chen Xiaoyan,Qiao Yingjie
Carbon fiber-reinforced composites (CFRCs) as the load-bearing structural component are widely used in the military and industrial fields. However, CFRCs undergo the severe oxidation in high-temperature oxygen environments, seriously affecting their service safety. In current work, SiO 2 and TiO 2 coatings are selected to synthesize on the CFRCs surface for improving their anti-oxidation by a liquid-phase deposition technique. The deposition technique is simple, controllable, and reproducible. The formation process, microscopic morphologies, chemical bonding, and molecular structure of SiO 2 and TiO 2 on the CFRCs surface are systematically investigated. A series of characterizations, namely X-ray diffractometry, Raman spectrum, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy, demonstrate that SiO 2 and TiO 2 coatings are successfully synthesized on the surface of CFRCs, respectively. The scanning electron microscopy and elemental distribution show that CFRCs are evenly loaded with SiO 2 or TiO 2 particles on the surface. TiO 2 particles grow faster and the synthesized particles are finer with the particle diameter of 200 ~ 300 nm in comparison with 400 ~ 500 nm of SiO 2 particles, under the same synthesis conditions. In addition, an isothermal oxidation test is conducted for the CFRCs modified by SiO 2 or TiO 2 at 1273 K for 30 min. The weight loss rate of modified composites is lower than 62.12% of bare sample. Among them, the composites modified by SiO 2 or TiO 2 at 70 °C for 3 h possess the lowest weight loss rate of 34.24 and 37.32%, respectively, indicating that the modification of SiO 2 and TiO 2 all can improve the oxidation resistance of CFRCs. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Dafu Tang,Sicheng Fan,Zerui Yan,Ziyi Fang,Binhao Wang,Xia Zou,Qiulong Wei
Low-cost hybrid sodium-ion capacitors (SICs) can deliver high energy density at high power, showing tremendous potential for application in large-scale grids. The negative electrode using hard carbon (HC) faces the limitations of poor rate capability and low volumetric capacity. Herein, we report the design of internal-parallel hybrid electrodes composed of HC microparticles (MPs) and anatase TiO2 nanoparticles (TiO2(A) NPs) for sodium-ion storage. Taking advantage of the rapid surface-redox properties of TiO2 NPs and the pseudocapacitive Na+ adsorption of HC in the slope region (1.5–0.1 V vs Na+/Na), the hybrid electrodes deliver enhanced high-rate capacities. Additionally, by utilization of the geometric features of the MPs and NPs, the compaction densities and volumetric capacities of the hybrid HC/TiO2 electrodes are much higher than those of HC electrodes. A series of fine controls demonstrates that the C60T40 electrode (HC/TiO2 = 60:40 in wt %) exhibits excellent comprehensive electrochemical performance, including high volumetric/gravimetric capacities, high-rate capability, and long-term cyclability. Even at a high mass loading of 10 mg cm–2, the HC/TiO2 thick-film electrode delivers a high volumetric capacity of 162 mAh cm–3 at 5 mA cm–2, surpassing that of the HC electrode (64 mAh cm–3). This work highlights the design of internal-parallel hybrid electrodes with a comprehensive electrochemical performance for advanced SICs.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhongming Wang,Xiaoqian Huang,Yong Jia,Lina Guo,Hong Wang,Wenxin Dai
Photocatalytic hydrogen production from formic acid (FA) is a daunting challenge, yet an essential task for the development of hydrogen energy. In this study, a p-NiO/n-TiO 2 heterojunction incorporating 7-nm metallic Ni was fabricated, which demonstrated a remarkable localized surface plasmon resonance (LSPR) effect. Notably, 5 wt% Ni/TiO 2 exhibited 1271-fold higher photocatalytic activity (2416 μmol⋅g −1 ⋅h −1 ) than TiO 2 alone under light radiation at room temperature. The experimental investigations revealed the excitation of distinct components via irradiation by different light sources. Visible light-driven hydrogen production was predominantly influenced by the LSPR-induced hot electrons and holes effects of Ni. Further, FA molecules simultaneously lost and accepted electrons at the Ni 0 –Ti 3+ and Ni 0 –O 2− sites, respectively, generating a bidirectional electron transfer behavior with “valley-shaped” gas-sensitive responses, which was crucial to boost the activity. Moreover, the photocatalytic activity was mainly attributed to the heterojunction and defects structure under UV light irradiation, and Ti 3+ , V O s, and O 2− as adsorption sites for FA. Thus, the synergistic interplay among different light sources could effectively boost the photocatalytic hydrogen production performance. Significantly, this research reveals that the LSPR effect of metallic Ni can effectively regulate electron transfer behavior and enhance visible light-driven photocatalytic activity.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Kun Wang,Shen Yu,Peng Jiang,Wenrui Liu,Man-Man Yuan,Wangyu Tong,Lihua Chen,Zhao Deng,Baolian Su
CO 2 reduction by a sustainable pathway such as photothermal catalysis is highly demanded currently, high carrier recombination rate still severely limits the performance of photothermal catalysis. Constructing heterojunction interfaces with high exposed area is an effective strategy to solve the problem of carrier recombination. However, fine control of the interface structure is still highly challenging. Herein, Density functional theory (DFT) calculations were constructed to reveal that metallic Bi leads to more densities of states (DOS) generation at the conduction band edge in Bi-BiOBr, which argues that photogenerated electrons are more likely to be delivered to metallic Bi. A TiO 2 @Bi-BiOBr hollow hierarchical core–shell heterojunction was designed, providing a highly exposed interface and Bi between interfaces. Such structure endows the catalyst with excellent photothermal catalytic performance, achieving a CO yield of 30.4 μmol·h −1 ·g −1 . The highly improved performance is attributed to interfacial thermoelectrons transfer boosted by the construction of TiO 2 @BiOBr heterojunction as well as metal Bi. And a possible CO 2 reduction pathway is proposed, which is consistent with the Carbine pathway. This study provides an exciting idea for the modulation of photoelectron transfer at catalyst interfaces.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qicheng Bi,Quanling Zhao,Zhiyong Qin,Wei Gao,Zequan Li,Shuduan Deng,Liuting Mo
Leaks during oil extraction, wastewater containing organic solvents from industrial production and oily wastewater from daily life pose a great threat to the ecosystem and human life, which makes the research and development of oil–water separation materials imminent. Nanocellulose aerogels possess lightweight properties, high porosities, and excellent adsorption capabilities, making them efficient adsorbents for the removal of oil spills and organic pollutants. A novel method is presented utilizing the self-polymerization characteristics of polydopamine (PDA) to encapsulate titanium dioxide (TiO 2 ) nanoparticles, thereby forming core–shell nanoparticles. The unique adhesive properties of PDA play a critical role in the binding of these nanoparticles to a cellulose nanofiber (CNF) scaffold, resulting in a robust composite material. To further enhance the performance of the aerogel, octadecyltrimethoxysilane (OTMS) was incorporated, imparting hydrophobicity to the overall structure, resulting in the OTMS/TiO 2 @PDA/CNF aerogel. This aerogel exhibited outstanding adsorption capabilities and absorbed various light and heavy oils, as well as organic solvents, with an adsorption capacity of up to 59.9 g/g. Under gravity, the separation efficiency of the aerogel reached 96.15 %. An innovative oil collection device was designed for the sustainable separation of pollutants from water to ensure efficient cleanup operations. Furthermore, the aerogel exhibited excellent antibacterial properties with a bactericidal rate of up to 99.14 % and significantly enhanced environmental adaptability. This simple, economical, and environment-friendly method is expected to promote the development of efficient oil/water separation adsorbents and contribute to the control of environmental pollution.
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Wenfan Yu,Jianchun Li,Chang Li,Wentao Liu,Shifeng Zhang
Photocatalysis has emerged as one of the most promising technologies for formaldehyde purification owing to its green, safe, and cost-effective properties. However, most photocatalysts exhibit poor light absorption properties and exist as powders, limiting their large-scale application. To address this challenge, Ag-AgCl@TiO 2 @cellulose nanofiber porous composites were prepared by integrating the photocatalysts into a cellulose matrix through physical/chemical dual crosslinking, photoreduction, and freeze-drying. The materials exhibited excellent mechanical properties due to the hydrogen bonding and electrostatic adsorption interactions between the components. Moreover, the porous composites exhibited excellent synergistic adsorption–photocatalytic degradation performance for formaldehyde. This is attributed to the abundant polar functional groups in the cellulose nanofibers and the heterostructure formed by TiO 2 , Ag, and AgCl. The composites achieved a maximum photocatalytic degradation rate of 99.54 %. After five cycles of reuse, they still maintained a high degradation efficiency of 99.07 %, demonstrating excellent recyclability. Compared with similar materials, the synthesized porous composites performed well in terms of degradation rate, maximum degradation efficiency, and cyclic reutilization performance. In summary, this study provides an innovative approach to air purification.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yichao Gong,Jiarui Li,Lin Liu,Zhaokun Li,Longchao Zhuo,Guojun Zhang
Multiphase composites of lithium ceramics have emerged as a prominent area of research in the development of advanced solid tritium breeding materials. In this study, Li 2 TiO 3 /Li 2 SiO 3 co-doped Li 4 SiO 4 ceramic pebbles were prepared through an in-situ reaction between Li 4 SiO 4 and TiO 2 . The objective of this study is to enhance the thermal cycling stability of Li 4 SiO 4 by impeding the grain boundary migration of Li 4 SiO 4 under high temperature conditions. The effects of the in-situ generated Li 2 TiO 3 /Li 2 SiO 3 particles on the microstructure, crush load and thermal cycling stability of Li 4 SiO 4 ceramic pebbles were investigated. The in-situ formed Li 2 TiO 3 and Li 2 SiO 3 particles effectively hindered the grain growth and minimized the formation of large intracrystalline pores in Li 4 SiO 4 . At a sintering temperature of 900 °C, the Li 2 TiO 3 /Li 2 SiO 3 particles are beneficial in increasing the crush load of Li 4 SiO 4 ceramic. However, at lower sintering temperatures, their impact was counterproductive. An increase in the volume fractions of the Li 2 TiO 3 /Li 2 SiO 3 had a positive effect on grain refinement but a negative effect on crush load. The Li 2 TiO 3 /Li 2 SiO 3 co-doped Li 4 SiO 4 ceramic pebbles exhibited excellent structural stability during thermal cycling. The optimum mechanical stability was achieved at a TiO 2 addition of y = 0.1. The in-situ generated fine second phase particles effectively impeded grain boundary migration at high temperatures, providing a viable strategy for improving the thermal stability of Li 4 SiO 4 tritium breeders.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Ming Yi,Jiangwei Shang,Yunqing Liu,Xiuwen Cheng
In recent years, eliminating impurities from wastewater has become increasingly crucial. Photocatalytic technology has become a viable strategy for degrading organic pollutants. This study created novel Z-scheme TiO 2 -modified g-C 3 N 4 using a solvent-tunable, two-step method. The optimized TiO 2 /g-C 3 N 4 -Et/vis system demonstrated a removal efficiency of 94.4 % for acetaminophen (ATP) within 40 min and 91.0 % for methylparaben (MPB) within 100 min. Furthermore, the system maintained 92.7 % ATP degradation efficiency after five cycles, indicating excellent recoverability and sustainability. Photochemical tests and mechanistic studies revealed that solvent modulation and TiO 2 modification increased the specific surface area and facilitated the formation of Z-scheme heterojunctions. These heterojunctions effectively inhibit the recombination of photogenerated electron-hole pairs and enhanced the degradation efficiency of organic pollutants, primarily driven by •O 2 − . LC-MS analysis found the intermediates of ATP and MPB, and several potential routes of degradation were suggested. This work sheds fresh light on the production of high-performance TiO 2 /g-C 3 N 4 nanoparticles for applications related to energy and the environment.
✓ 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）