JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 2
·1941-1950
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IF 2.478
Chen Jiabing,Lu Youluan,Huang Leshu,Shi Zhen,Zheng Yin,Song Xinjian,Wu Chenyi,Wu Zaikun
The fouling and passivation of the electrodes tend to reduce the sensitivity and lifetime of the electrodes. In this work, the mesoporous carbon-doped La-TiO 2 modified electrode not only has a good detection signal for catechol and hydroquinone, but also can achieve the purpose of electrode regeneration under illumination. A series of porous carbon materials LTOF-T (La-Ti Organic Frameworks-Temperature, LTOF-T) were prepared by hydrothermal method and pyrolysis method using La(NO 3 ) 3 ⋅6H 2 O, p -tricarboxylic acid, citric acid monohydrate, and tetra- n -butyl titanate as raw materials. The materials were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), N 2 adsorption–desorption, and Raman spectroscopy. The electrochemical behaviors of catechol (CA) and hydroquinone (HQ) on different electrodes were investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Under the optimal conditions, HQ and CA concentrations were linear in the range of 0.4–20 μmol/L, and the detection limits were 0.039 μmol/L (HQ) and 0.034 μmol/L (CA) at the signal noise ratio of 3. The electrode can be regenerated under visible light irradiation within 60 min.
研究领域:
分析化学
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材料科学
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环境科学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Jiaqi Li,Mingfei Wang,Jiamin Qi,Xueqian Wang,Langlang Wang,Fei Wang,Kai Li,Yixing Ma,Ping Ning
Hydrogen cyanide (HCN), a common toxic and hazardous air pollutant in industrial exhaust, catalytic hydrolysis of HCN has been the focus of air pollution control research. In this study, a catalyst material (La-TiO 2 ) with high catalytic hydrolysis activity for HCN was obtained by loading La 2 O 3 on the TiO 2 surface, which could realize the complete conversion of HCN at 150 °C with high selectivity of NH 3 and CO 2 . The relevant characterization confirms that La 2 O 3 can be uniformly distributed on the TiO 2 , which can adjust the acid-base structure of the catalyst surface and induce the generation of multi-hydroxyl structures in TiO 2 . On this basis, the combination of in-situ technique and density functional theory (DFT) calculations confirmed that the loading of La 2 O 3 prompted the La-TiO 2 catalyst to activate H 2 O to generate surface hydroxyl groups (-OH), which further enriched the hydroxyl groups on TiO 2 and substantially improved the hydrolysis activity and NH 3 selectivity of the catalyst. And the study confirms that the hydroxyl-rich environment easy combine with the reaction intermediate (formic acid) to generate CO 2 and H 2 O, which accelerated the reaction rate, thus improving the conversion efficiency of HCN and lowering the catalytic conversion temperature. In addition, O 2 can continuously consume the remaining hydrogen atoms after the dissociation of H 2 O to generate hydroxyl groups again, thus effective enhancing catalyst stability. This study provides new theoretical support for the catalytic hydrolysis of HCN and new insights and ideas for the design and development of catalysts for the catalytic hydrolysis of HCN.
研究领域:
环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Lihuan Mo,Peiqi Lyu,Zhen Yang,Jie Gong,Kai Liu,Jun Li
Bagasse pulp wastewater has restricted and disturbed the bagasse pulp industry all the time. In this paper, photocatalytic oxidation technology (O 3 +UV+TiO 2 ) was applied to bagasse pulp wastewater treatment. TiO 2 was prepared into a composite photocatalyst (La-TiO 2 /Al 2 O 3 ) to improve the treatment effect. p-Chlorophenol was chosen as a target compound to evaluate the catalytic activity and study the preparation process of La-TiO 2 /Al 2 O 3 . La-TiO 2 /Al 2 O 3 was finally used in the treatment of real bagasse pulp wastewater with photocatalytic oxidation technology. Under an optimum experiment conditions, chemical oxygen demand (COD) and total organic carbon removal rate of bagasse pulp wastewater reached 80.2% and 77.1%, respectively, and AOX dropped to 2.9 mg/L. Most organic pollutants in the wastewater had been removed. Additionally, in the reusability study, COD removal was maintained at 70.5% at 7th reuse. These findings of present study revealed that La-TiO 2 /Al 2 O 3 held great potential in the practical photocatalytic degradation application of industrial organic wastewater.
研究领域:
环境科学
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化学工程
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材料科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 12
·8383-8393
·
IF 3.9
Yan Wang,Jingyu Xiu,Tao Gan,Haiming Zou,Feiyue Li
In this work, a visible light-driven La/TiO2@g-C3N4 photocatalyst was synthesized for the photodegradation of tetracycline hydrochloride (TCH) in the presence of peroxydisulfate (PDS) in an internal loop-lift reactor. The surface morphology and structure of La/TiO2@g-C3N4 have been characterized by XRD, SEM-EDS, FTIR, XPS, and UV/vis DRS. La/TiO2@g-C3N4 displays outstanding photocatalytic performance and reusability. After four reuse cycles of the vis/La/TiO2@g-C3N4/PDS system, the TCH degradation rate and efficiency still reached 0.083 min−1 and 97.68%, respectively. Reactive species in this system included free radicals SO4˙−, ˙OH, and ˙O2−, as well as non-radicals e−, and h+, as established from the results of chemical quenching experiments. Moreover, a mechanism of action of the vis/La/TiO2@g-C3N4/PDS system for TCH degradation was proposed. The acute toxicity of the reaction solution towards Photobacterium phosphoreum T3 spp. in the vis/La/TiO2@g-C3N4/PDS process increased during the first 60 min and then decreased, illustrating that vis/La/TiO2@g-C3N4/PDS provided an effective and safe method for the removal of TCH.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2020
·Vol. 20
·期 2
·779-788
·
IF 1.134
Fan Ji-Min,Lei Yun-Yu,Gu Zhan-Yong,Zhang Bing,Yin Shu,Zhao Zhi-Huan
N and F co-doped La-TiO2 (La-TONF) samples were prepared through the solvothermal method by using HMT and NaF as precursors. The obtained samples were characterized by UV-Vis DRS, XRD, XPS and PL measurements for light-harvesting properties, crystal phase and optical characteristics,
respectively. Interestingly, the TONF sample had a different fluorescence emission intensity than the TON or TOF samples, thus suggesting a clear synergistic effect of N and F co-doping. The optimal doping amount of La was 2 wt.%, and the absorption edge was red-shifted from 453 nm to 464
nm for La-TiO2 and La-TONF. The photocatalytic activity was evaluated by degradation of MO and oxidation of TMB under visible light irradiation. La-TONF exhibited excellent photocatalytic activity and a degradation rate of 92.4%, 4.4 times that of undoped TiO2 (20.8%).
The photocatalytic degradation activity remained above 85.8%, even after five runs. In addition, the MO photodegradation catalyzed by La-TONF followed first order kinetics. According these results, a possible synergistic effect mechanism for the enhanced photocatalytic performance is proposed.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2016
·
IF 7.476
Dawei Fan,Xiang Ren,Haoyuan Wang,Dan Wu,Di Zhao,Yucheng Chen,Qin Wei,Bin Du
A novel and sensitive sandwich-type photoelectrochemical (PEC) sensor was fabricated using signal amplification strategy for the quantitative detection of the prostate specific antigen (PSA). CdSe nanoparticles (NPs) sensitized lanthanum-doped titanium dioxide (La-TiO 2 ) composites were used to bind the primary antibodies (Ab 1 ). The doping of lanthanum promoted the visible light absorption of TiO 2 and remarkably enhanced the photocurrent . Moreover, 0.3%La-TiO 2 displayed the highest photocurrent in the La-TiO 2 composites, which was twice as much as that of undoped TiO 2 . Carboxyl modified CdSe NPs were assembled onto La-TiO 2 composites via the dentate binding between –COOH and Ti atom in TiO 2 NPs, which dramatically promoted the photocurrent intensity by approximately 2.1 times. Carboxyl functionalized polystyrene (PS) microspheres were coated with the secondary antibodies (Ab 2 ). Owing to the better insulation property and steric hindrance of the prepared polystyrene@Ab 2 (PS@Ab 2 ) composites, the significant reduction of the photocurrent signal was achieved after the specific immune recognition. Under the optimum experimental conditions, the fabricated PEC sensor realized ultrasensitive detection of PSA in the range of 0.05–100 pg mL −1 with a detection limit of 17 fg mL −1 . Moreover, this well-designed PEC immunoassay exhibited ideal reproducibility, stability, and selectivity, which is a promising platform for the detection of other important tumor targets.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jingying Xu,Teng Hou,Jing Zhou,Hao Ye,Yaru Wang,Lvzhu Cheng,Xianglong Li,Bin Yang
Photocatalytic fibrous membranes are regarded as one of the most proficient materials for environmental remediation because of their excellent photocatalytic activity, porous structure, and outstanding recyclability. However, the poor dispersion performance of photocatalysts in the polymer matrix and the low migration ability to the surface constrain the development of this technology. In this study, a versatile strategy was developed to facilitate the design of hydrophilic nanofibrous membranes with promising photocatalytic activity and robust recyclability by combining the loaded rare earth element La 3+ modified TiO 2 photocatalyst, introducing hyperbranched polymers as dispersants within electro-centrifugal spinning, and applying post-treatment to construct hydrophilic sites. Significantly, the removal efficiency of the fibrous membrane materials on the dye wastewater was as high as 89.34 %, and the treatment efficiency can still reach 81.68 % after five cycles. In addition, the photocatalytic mechanism for the degradation of organic pollutants was also analyzed. This work provides a new method for building advanced photocatalytic nanofibrous membranes, which is expected to be used in the treatment and remediation of environmental wastewater.
研究领域:
环境科学
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材料科学
·
纳米技术
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化学工程
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光催化
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高分子材料
·
水处理技术
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·Vol. 49
·期 9
·3526-3535
·
IF 2.5
Shuang Meng,Yan Zhuang,Xue Yang,Dongxuan Guo,Jinlong Li
Volatile organic compounds (VOCs) emitted from industrial activities and transportation pose significant health risks to humans and contribute to environmental issues. As a result, there has been growing interest in developing effective technologies for VOC removal. This study investigates the removal of low-concentration VOCs from air using a membrane catalytic process that combines a supported ionic liquid membrane (SILM) with a novel visible light-driven photocatalyst. The system, consisting of a 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM]PF6) SILM and N-doped La–TiO2 photocatalysts, achieves a mineralization rate of 40%–60% and a removal efficiency of approximately 75% for VOCs under visible light exposure for 10 hours. The synergistic effects of membrane separation and photocatalytic degradation significantly enhance the overall VOC removal efficiency compared to using either method alone. The membrane catalytic system demonstrates particular applicability and stability for various organic compounds, including toluene, acetone, chloroform, benzene, and xylene. Overall, this work presents a promising approach for the removal and mineralization of VOCs.
研究领域:
环境科学
·
化学工程
✓ 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）