CHEMICAL ENGINEERING JOURNAL
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2015
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IF 4.321
Jing Di,Shixiong Li,Zhefei Zhao,Yicao Huang,Yi (Alec) Jia,Huajun Zheng
Two kinds of CNT@TiO 2 biomimetic composites with needle-leaved (NL) and broad-leaved (BL) trees morphology were synthesized respectively by a simple one-step solvothermal method for the first time. The TiO 2 leaves located on CNT stems act as active sites for photocatalysis. The method allows one to prepare the composites with distinguish morphology of TiO 2 leaves by adjusting the mass ratio of CNT and TiO 2 . In the photodegradation test of methylene orange, the reaction rate up to eightfold increment was observed with both the biomimetic composites compared to bare TiO 2 . The improved photocatalytic activity could be owed to two aspects, namely the enhanced light trapping and scattering ability benefited from large specific area and the direct transport pathway for electrons conducted by CNT, which all derive from the advantages of the unique tree-like structure. This work presents a new strategy to synthesize hetero-photocatalysts with maximized light-harvesting efficiency and low electron hole recombination rate concurrently. These results demonstrate the great potential of biomemic composites and would stimulate further research in photocatalysis and related areas.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2017
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IF 2.764
Chao Li,Weiyi Yang,Qi Li
To develop TiO 2 -based photocatalysts with visible light activity for better solar energy utilization, a simple flash oxidation method was developed by calcining commercial TiN nanoparticle to prepare N-doped TiO 2 photocatalyst and TiN/TiO 2 composite photocatalysts through the modulation of the calcination time and temperature. It was found that more energy and processing time were needed to prepare N-doped TiO 2 photocatalyst than that of TiN/TiO 2 composite photocatalyst during this process, while TiN/TiO 2 composite photocatalyst had a better visible light absorption/photocatalytic performance than that of N-doped TiO 2 photocatalyst prepared from the oxidation of the same TiN precursor. Thus, the preparation of TiN/TiO 2 composite photocatalyst from TiN precursor should be a more preferred approach than the preparation of N-doped TiO 2 photocatalyst for visible-light-activated photocatalysis for its cost-effectiveness.
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
RSC Advances
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2016
·Vol. 6
·期 16
·13505-13513
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IF 3.289
Wenjun Zhu,Hui Yang,Xingzhong Guo
Porous ellipsoid-like Li4Ti5O12–TiO2 composites with a unique micro/nano structure have been successfully fabricated via a facile sol–gel route followed by calcination. The porous ellipsoid-like particles with micro/nano structures are formed through phase-separation induced by poly(ethylene oxide) (PEO), which are constructed using numerous nanocrystals with sizes of about 50–100 nm consisting of lithium titanate, anatase and rutile. The resultant Li4Ti5O12–TiO2 composite shows a superior rate capability and cycling stability in comparison with pure Li4Ti5O12, which delivers a reversible capacity over 92 mA h g−1 at 10C after 100 cycles as well as an acceptable rate capacity of 89 mA h g−1 at a high rate of 30C. The excellent electrochemical performance of the Li4Ti5O12–TiO2 composite is attributed to the unique micro/nano and multiphase structures. The micro/nano structure enhances the structure stability and shortens the diffusion distance for both electron and lithium ions. Moreover, the abundant phase interfaces and grain boundaries store extra lithium ions and guarantee rapid lithium insertion/extraction kinetics.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2023
·Vol. 58
·期 18
·7571-7582
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IF 4.5
Yang Yang,Lu Jie,Ma Zhichun,Zhao Yi,Wang Shuang,Ge Kai,Yang Yongfang
Two dimensional (2D) CuTCPP/B–TiO 2 composites were successfully synthesized by addition of B–TiO 2 NPs into the system for preparation of 2D CuTCPP nanosheets under hydrothermal condition. 2D CuTCPP nanosheets with large specific surface area can not only act as supportor to decrease the aggregation of B–TiO 2 and improve the adsorption capacity of methylene blue (MB) but also provide more transfer pathway to effectively facilitate interfacial charge transfer and separation of photogenerated electrons and holes, thus leading to a superior efficiency for photodegradation of MB. The photocatalytic degradation rate constant of 2D CuTCPP/B–TiO 2 composites is 0.0486 min −1 , which is about 15.2, 5.92 and 4.23 times that of P25 (k = 0.0032 min −1 ), 2D CuTCPP nanosheets ((k = 0.0082 min −1 ) and B–TiO 2 NPs (k = 0.0115 min −1 ). This study demonstrates that the combination of B–TiO 2 NPs and 2D CuTCPP is a viable strategy to improve the photocatalytic efficiency for degradation of MB.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
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2020
·Vol. 30
·期 9
·3378-3387
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IF 1.941
Ai Cuiling,Wu Xuefang,Ke Yuting,Lei Yingjie,Shao Xiangwen
The photocatalyst sorbic acid (SA)/titanium dioxide (TiO 2 ) was successfully synthesized by sol–gel method and characterized. The composite exhibited regularly spherical particles with the size of 50 nm and the specific surface area of 90.3 m 2 g −1 , furthermore, it showed mesoporous structure and significantly improved dispersion. SA was grafted on TiO 2 surface by –COOTi and TiO 2 existed as pure anatase phase in the composite. The addition of SA made the band gap of TiO 2 increased from 3.03 to 3.35 eV, which indicting that the composite exhibited a strong response to the ultraviolet light. The optimum preparation parameters of the catalyst were as follows: n(Ti):n(SA) = 1:0.05, ethanol 60 mL, glacial acetic acid 40 mL, hydrothermal temperature 180 °C, hydrothermal time 12 h. The composite could reach the 4.31 log reduction of E. coli , with the optimum catalyst dosage of 0.7 g L −1 , irradiated by UV light for 60 min. SA/TiO 2 was an environmentally friendly, non-toxic and safe sterilized nanocomposite material appropriate for future bactericidal applications, providing a new way to effectively increase the dispersion of TiO 2 particles to achieve superior photocatalytic sterilization efficiency.
研究领域:
材料科学
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环境科学
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微生物学
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DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
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2019
·Vol. 29
·期 3
·799-805
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IF 1.637
Zhao Piqi,Liu Honghua,Guo Xiangyang,Wang Han,Wang Shoude,Lu Lingchao,Cheng Xin
The bamboo charcoal/nano-TiO 2 (BC/TiO 2 ) composite material is designed and prepared for further improving photocatalytic property of TiO 2 . Assessment of BC/TiO 2 composite material and its application in photocatalytic coating are investigated by nitrogen absorption test, scanning electron microscopy-energy disperse spectroscopy (SEM-EDS) characterization and photocatalytic and mechanical properties analysis. The results show that optimal ratio of TiO 2 to BC is 0.03. Rhodamine B (RhB) degradation ratio can reach 62.9% under 4 h UV light irradiation, which is 43.7% higher than pure TiO 2 sample. The specific surface area (S BET ) and the total average pore size ( \(\overline {D}\) ) of BC/TiO 2 can reach 388.33 m 2 /g and 3.71 nm, respectively. Moreover, the photocatalytic coatings prepared mainly by BC/TiO 2 and polyacrylic emulsion (PAE), not only show satisfactory mechanical properties, but also have excellent photocatalytic property. When the addition of BC/TiO 2 composite materials is 6%, the photocatalytic property of coating is optimal, RhB degradation ratio can reach 83.7% under 8 h UV light irradiation. Also the adhesion, pencil hardness and impact resistance reach 2 level, 2H and 44 kg cm, respectively.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Journal of Materials Chemistry A
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2021
·Vol. 9
·期 10
·6325-6334
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IF 12.732
Peng Zhou,Shuhua Wang,Guangyao Zhai,Xingshuai Lv,Yuanyuan Liu,Zeyan Wang,Peng Wang,Zhaoke Zheng,Hefeng Cheng,Ying Dai,Baibiao Huang
Ni/TiO2 as a classic system has been widely studied in the traditional catalysis field including the water-gas shift reaction and selective oxidation/hydrogenation. However, in terms of the electrocatalytic hydrogen evolution reaction (HER), there is still a lack of systematic research on the actual synergistic promotion effect on the performance, and the influence of the host material on the electronic interaction between Ni and TiO2 is still unclear. Herein, we synthesized a series of Ni/TiO2 composites with different forms and tested the relevant HER performance. The results show that Ni/TiO2 exhibits much better HER performance than pure Ni and there is one type of electronic interaction between Ni and TiO2 in the composite with different forms, that is, electrons transfer from Ni to TiO2. However, the interaction strength is host dependent, and the composite with Ni as the host displays the strongest interaction, and therefore the best HER performance (46 mV at 10 mA cm−2).
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
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2016
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IF 2.435
Ailan Qu,Xinmei Xu,Haolong Xie,Yangyu Zhang,Yuyu Li,Junxian Wang
A composite of graphitic carbon nitride and TiO 2 (g-C 3 N 4 /TiO 2 ) with enhanced photocatalytic hydrogen evolution capacity was achieved by calcining melamine and TiO 2 sol-gel precursor. Characterization results reveal that heating temperature had a great influence on the structure, surface area and properties of the composites. Compared with the polycondensation of pure melamine, the presence of TiO 2 precursor can promote the formation of melon at a low temperature. The highest photocatalytic activity of g-C 3 N 4 /TiO 2 (400) was achieved when the calcination was performed at 400 °C, exhibiting H 2 production rate of 76.25 μmol/h under UV–vis light irradiation (λ > 320 nm) and 35.44 μmol/h under visible light irradiation (λ > 420 nm). The highest photocatalytic performance of g-C 3 N 4 /TiO 2 (400) can be attributed to: (1) the strong UV–vis light absorption due to the narrow bandgap caused by synergic effect of TiO 2 and g-C 3 N 4 , (2) high surface area and porosity, (3) the effective separation of photo-generated electron-holes owing to the favorable heterojunction between TiO 2 and g-C 3 N 4 .
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
JOURNAL OF POWER SOURCES
·
2013
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IF 4.675
Siyao Guo,Song Han,Haifeng Mao,Shimiao Dong,Congcong Wu,Lichao Jia,Bo Chi,Jian Pu,Jian Li
A versatile synthetic method, which is based on a low-temperature hydrothermal technique, is developed for the fabrication of a microporous ZnO/TiO 2 composite catalyst with different structures (e.g., amorphous , amorphous/crystalline and crystalline). In particular, a novel microporous ZnO/TiO 2 composite with amorphous/crystalline structure is obtained with a 3/1 M ratio of Ti/Zn. This novel ZnO/TiO 2 composite heterostructure not only has a large specific surface area (311.9 m 2 g −1 ) but also exhibits outstanding performance during solar water splitting reactions to generate hydrogen without a noble metal co-catalyst. Based on our in-depth mechanistic analysis, the synergistic effect between the amorphous ZnO and crystalline TiO 2 is responsible for the enhanced performance of this material.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2017
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IF 5.401
Xike Tian,Lin Liu,Yong Li,Chao Yang,Zhaoxin Zhou,Yulun Nie,Yanxin Wang
Detection of pesticides in ground water has become a very important and crucial research area due to the rapid expansion of agriculture and stringent environmental protection acts. In this paper, the as-prepared CuO-TiO 2 hybrid nanocomposites were decorated on the glass carbon electrode as the nonenzymatic electrochemical nanosensor for the sensitive and selective detection of methyl parathion. The electrochemical behavior of the modified electrode was investigated by cyclic voltammetry, showing that the modified electrode can be used for methyl parathion detection. Differential pulse voltammetry was applied to evaluate methyl parathion detection ability under optimized experimental conditions, and found the modified electrode can detect methyl parathion sensitively in a wide dynamic detection range from 0 ppb to 2000 ppb with a lower limit of detection (LOD) of 1.21 ppb. In addition, other interfering materials have no any influences on the detection of methyl parathion. Furthermore, the modified electrode has also been used for methyl parathion detection in the actual ground water samples, and showed efficient sensing ability. The electrochemical sensor developed would have great potentiality for methyl parathion sensing and provide new insights into the detection of other organophosphorous pesticides in the ground water.
研究领域:
环境科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Sciences
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2023
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IF 6.9
Hualong Wu,Yanxia Zhao,Jiexi Wang,Xiaoyan Li,Kaimin Shih,Xuguang Li,Wei Liu
Resource recycling from waste-water and sludge is an important part of the 14th Five-Year Plan in China. The emerging titanium-based coagulants have drawn growing attentions due to their strong coagulation capability in water purification and value-added Ti-loaded sludge production. Management and recovery of the high value-added sludge into functional nanomaterials is highly significant for both sludge reduction and environmental remediation. The present study was carried out to investigate the recycle of the coagulated Ti-loaded sludge to produce functional C/TiO 2 composites as the anode materials for lithium-ion batteries (LIBs). It is the first time that the application of the Ti-loaded wastewater sludge derived C/TiO 2 was evaluated for LIBs. The experimental results showed that the carbon coating through in-situ carbonization of the sludge produced the C/TiO 2 composites with a high specific surface area, stable structural integrity, and excellent electrochemical properties that would facilitate Li + diffusion in long-term LIBs usage. The C/TiO 2 composites calcinated from the polytitanium sulfate-coagulated sludge at 800°C (N 2 ) exhibited the best electrochemical performance during the cycling tests (601 mAh/g at 100 mA/g after 200 cycles). The research work demonstrates the promising prospect of the recycle and value-added utilization of the Ti-loaded sludge in the production of high-performance C/TiO 2 composites for energy storage applications. This study provides a new way for the management and reuse of Ti-loaded waste-sludge.
研究领域:
环境科学
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材料科学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Yunning Chen,Zhengkai Wu,Renquan Guan,Xueying Cheng,Qingkun Shang,Yingnan Sun
Improving the efficiency of photogenerated charge separation and transport is the primary goal of designing and constructing efficient composite photocatalysts. The matching of energy bands and the formation of chemical bond between the two components are very conducive to the separation and transmission of photogenerated charges. Herein, three perylene diimide derivatives (PDIs) are synthesized by introducing sulfonic acid group (PDI-SA) and benzenesulfonic acid (PDI-BSA) respectively into the amide bond and further chlorine bay-substituting (Cl-PDI-BSA). The good water solubility of Cl-PDI-BSA ensures its forms a stable chemical bond with TiO 2 through the sulfonic acid group in the single molecular state, coupled with the matching of energy band structure, TiO 2 @Cl-PDI-BSA exhibited excellent performance upon visible light photocatalytic degradation to phenol and trenbolone acetate (TBA). It can remove 100% of phenol in 15 min and 100% trenbolone acetate (TBA) in 30 min, which is 14.3 times that of TiO 2 . Combining to DFT calculation, Kelvin probe force microscope and EPR analysis prove that bay chlorine substitution has a greater impact on the energy band structure and electron cloud distribution of PDIs than N-sulfonation, thereby seriously affecting the transport of photogenerated carriers with TiO 2 .
研究领域:
材料科学
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环境科学
·
化学
✓ 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）