ENVIRONMENTAL ENGINEERING SCIENCE
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2024
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IF 1.8
Yiting Wang,Mingze Xu,Jinhua Li,Tingsong Zhang
Titanium dioxide (TiO2) has been widely studied as a photocatalyst owing to its advantages of low cost, good stability, and nonpollution. However, they can only be excited by ultraviolet light, resulting in low utilization of solar energy and limited photocatalytic efficiency. In recent years, researchers have found that the nonprecious metal Al can effectively improve the photocatalytic performance of TiO2. However, the current studies focus only on enhancing the ultraviolet photocatalysis performance of semiconductors with Al on the substrate. In this study, Al nanoparticles (NPs) and TiO2 were prepared into composite materials. The effects of ligand, Al particle size, and the molar ratio of Al and TiO2 on the photocatalytic degradation of methylene blue (MB) by Al NPs and TiO2 composites (Al NPs/TiO2) were investigated. The results showed that the Al NPs/TiO2 prepared with a particle size of 200 nm of Al, glutathione as the ligand bridge, and an Al:TiO2 ratio of 2:1 were the most effective for the degradation of MB. The degradation rate of 5 mg/L MB solution within 70 min under visible light was up to 99.5%, which was three times higher than that of P25 TiO2. The photocatalytic performance was further enhanced under sunlight with a degradation rate of 99.7% within 50 min, which is four times higher than that of P25 TiO2 under the same light source. Therefore, Al NPs/TiO2 is a potential photocatalytic material for the treatment of organic pollutants in water.
研究领域:
环境科学
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材料科学
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化学
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DOI
高影响因子
Journal of Chemistry
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2019
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IF 1.727
Fei Chang,Zhong Bing He,Quan Zhou
Four kinds of Al-TiO2 solid samples with different Ti/Al ratios of 1 : 0.1, 1 : 0.09, 1 : 0.07, and 1 : 0.05 were synthesized via a solid-phase synthesis method and characterized by XRD, SEM, EDS, BET, and other techniques. The prepared solids were used for separation of the bioderived product danshensu, the content of which was determined by UV spectrophotometry. Moreover, the effects of extract concentration, PH value, adsorption time, and ethanol elution volume were investigated. The results showed that these Al-TiO2 samples had good adsorption and desorption ability. Especially, the solid Al-TiO2 with a Ti/Al ratio of 1 : 0.05 is more suitable for the separation of danshensu, exhibiting a higher adsorption (77.70%) under 2 h adsorption time and pH = 3; meanwhile, the high desorption rate (70.29%）was received under 80% ethanol and the sample concentration of 3.0 mg/mL.
研究领域:
材料科学
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分析化学
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药学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2022
·Vol. 30
·期 4
·9738-9748
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IF 5.19
Liu Jing,Xu Mingze,Zhang Tingsong,Chu Xueying,Shi Kaixi,Li Jinhua
TiO 2 is a catalyst that can effectively degrade organic pollutants with the following advantages, low cost, simplicity, and pollution-free nature. In recent years, the non-noble plasmonic metal Al has effectively improved the photocatalytic performance of TiO 2 . However, the current reports are limited to the photocatalytic performance of Al/TiO 2 on the substrate, which requires expensive large-scale vacuum equipment. In this study, monodispersed Al particles were proposed to enhance the photocatalysis of TiO 2 . The localized surface plasmon resonance (LSPR) effect of Al is proven by finite difference time domain method (FDTF) simulation. Then, Al/TiO 2 composites were prepared by combining monodispersed Al and TiO 2 . The influence of ligand (glutathione (GSH), glutamic acid (GAG), or 3-mercaptopropane acid (MPA)), Al size (40 to 300 nm), and the ratio of Al to TiO 2 (0.5:1 to 10:1) on the photocatalytic degradation of methylene blue (MB) by Al/TiO 2 were discussed. The obtained results showed that the Al/TiO 2 composite which were prepared with 200 nm Al particles, GSH as the ligand bridge, and an Al:TiO 2 ratio of 1:1 had the best MB degradation effect. It can degrade 97.7% of 10 mg/L MB in 100 min. The reaction rate of the Al/TiO 2 composite with the optimal photocatalytic performance is k =3.36×10 -2 min -1 , which is 10 times that of P25 TiO 2 . In addition, Al/TiO 2 has a good photocatalytic effect on rhodamine B (RhB) and crystal violet (CV). Therefore, Al/TiO 2 composites with the advantage of high efficiency are a type of potential photocatalytic material that can be used for the photocatalytic treatment of organic pollutants in water.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
THIN SOLID FILMS
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2025
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IF 2
Jinyan Pan,Qiao Huang,Ruotong He,Tiejun Li,Hongyang He,Lingsen Yan,Zhenping Wang,Yan Liu,Jing Li,Yunlong Gao
The resistive properties and mechanisms of devices with different structures were investigated by fabricating TiO 2 and Graphene Oxide (GO) films on Indium Tin Oxides (ITO)conductive glass using spin-coating techniques. The results show that our prepared devices can undergo SET/RESET under different voltages and exhibit unique resistive change characteristics. In addition, we found a complementary resistive switching (CRS) behavior in the Al/TiO 2 /GO/ITO structured devices, similar to the memristor which is reverse-series connection of Al/TiO 2 /ITO and Al/GO/ITO. And its resistive behavior is analogous to neuronal firing processes-depolarizing and polarizing behavior. Furthermore, the resistance is modulated by constant voltage and the stimulus gets gradual resistance increase (long-term depression, LTD), and causes progressive resistance decrease (long-term potentiation, LTP). This study provides a reference for the application of the synergistic combination of CRS behavior and tunable resistance states enables a dual-path approach for implementing neuronal and synaptic functionalities in bio-inspired electronics, offering a reference framework for complementary memristor-based bionic neurons that broadens the application scope of Resistive Random Access Memory.
研究领域:
电子材料
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纳米技术
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神经形态工程
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存储器件
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薄膜技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）