RSC Advances
·
2014
·Vol. 4
·期 79
·41744-41752
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IF 3.708
Xuegang Luo,Sizhao Zhang,Feng Ding,Ke Li,Xiaoyan Lin
A novel thermal catalyst in response to heat excitation was first synthesized and then added into low density polyethylene (LDPE) matrix to prepare corresponding films. The thermocatalytic degradation of LDPE/thermal catalyst (LEPDET) film was investigated under artificial ageing conditions. The changes in the films were evaluated by measuring the surface morphology, average molecular weight, crystallization capacity, chemical group, contact angle, and mechanical property. The results obtained show that the surface of as-prepared film was seriously destroyed because of the thermocatalytic reactions at 40 °C in darkness. A rapid decreasing tendency of the average molecular weight was clearly monitored, simultaneously, the crystallization capacity decreased significantly. The presence of carbonyl groups was observed during degradation process, and the above-mentioned groups were also detected mediately in contact angle view. Additionally, on the basis of the above-mentioned evidences, a possible mechanism for the thermoctalytic degradation was also established in detail. Thus, the effectiveness of thermocatalytic route has been successfully demonstrated by heat excitation at near room-temperature. It is hoped that our study may develop an alternative method for the disposal of polymeric film in the future.
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
GREEN CHEMISTRY
·
2021
·Vol. 23
·期 24
·10039-10049
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IF 10.182
Yingying Cao,Dandan Chen,Ye Meng,Shunmugavel Saravanamurugan,Hu Li
Chemocatalytic production of lactic acid from biomass feedstock is an alternative route with high potential, but with the prerequisites of long reaction time, high temperature, and/or a tailored catalyst. In this work, an N-TiO2 photothermal catalyst prepared by a simple sol–gel method using urea as a nitrogen and carbon source could catalyse a variety of biomass sugars to quantitatively produce lactic acid (up to 98.9% yield) in water under visible light and at a low temperature of 60 °C in a time as short as 30 min. N-TiO2 provides a suitable valence band position (2.51 eV) for the photo-oxidation reaction, with more active species being formed on the catalyst surface (e.g., h+, e−, ˙OH and ˙O2) and a light-induced heating effect caused by the carbon photothermal layer, which can effectively activate carbohydrates to undergo a cascade reaction process. Theoretical calculations show that the charge of N-TiO2 is highly separated, in which the N element acts as an electron trap and is enriched with plenty of electrons, leading to effective isolation of holes and electrons. In addition, the N-TiO2 catalyst exhibits good reusability and can be recycled with little loss of activity. The developed N and C-enhanced photothermal synergistic protocol opens up an avenue for producing organic acids from renewable biomass resources under mild conditions.
研究领域:
催化化学
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可再生资源利用
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
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2024
·
IF 4.4
Xuewei Tu,Can Sun,Yang Hu,Yutong Chen,Shouxin Zhu,Jingyi Qu,Zhexiao Zhu,Xiang Zhang,Hui Zheng
Cycloaddition of CO2 and epoxides to synthesize cyclic carbonates via photothermal catalysis represents one of the effective strategies for achieving carbon neutrality. In this study, a facile one-step hydrothermal method was employed to synthesize a bimetallic photothermal catalyst FeCo@BPDC. This catalyst demonstrates remarkable efficiency in fixing CO2 to synthesize cyclic carbonates under atmospheric pressure and solvent-free conditions. Through comprehensive characterization and experimentation, the indispensability of bimetallic active sites has been convincingly demonstrated. Additionally, the incorporation of organic ligands significantly enhances the concentration of oxygen vacancies within the catalyst, thereby endowing it with excellent photocatalytic performance. This study presents a novel perspective for the design of photothermal catalysts that convert CO2 into value-added chemicals under mild conditions.
研究领域:
化学工程
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材料科学
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环境科学
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催化
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2019
·Vol. 21
·期 39
·21798-21805
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IF 3.567
Hao Zhou,Yanhui Zhang
Composites of the noble metal Au supported on MgAl-LDHs were prepared by a simple impregnation-reduction method to be used as thermal- and photocatalysts for the photocatalytic degradation of ciprofloxacin and thermocatalytic decomposition of formic acid to produce hydrogen. A collection of techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) were employed to determine the structure and morphology properties of the as-prepared Au/MgAl-LDHs. The presence of surface Au(0) in Au/MgAl-LDHs was confirmed by TEM and XPS analyses. For the first time, we compared the effect of the surfactant PVP on the catalyst and found that the Au/MgAl-LDH composite with Au particle size of 2–8 nm had better catalytic activity than the (PVP@Au)/MgAl-LDH composite with Au particle size in the range of 1–5 nm. The sizes of Au NPs in the two catalysts were similar but had different effects on the catalytic performance. This indicated that the addition of PVP had an inhibitory effect on the catalytic activity of the catalyst. To evaluate the photostability of Au/MgAl-LDHs, recycle experiments for the photocatalytic degradation of ciprofloxacin were performed, and it was found that Au/MgAl-LDHs had good stability. Finally, we also applied Au/MgAl-LDHs in environmental catalysis and energy catalysis; we hope that they will be useful in practical applications.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
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2023
·
IF 5.5
Luping Zhang,Xuewei Tu,Yutong Chen,Shouxin Zhu,Can Sun,Yanjiang Song,Hui Zheng
The conversion of CO 2 to cyclic carbonate under mild conditions is an effective strategy to achieve carbon neutrality . This work reports the formation of cyclic carbonates by coupling CO 2 with epoxides using a photothermal catalyst (CoFe 2 O 4 @PDA) with added organic ligands of bimetals under atmospheric pressure, solvent-free, 70 °C and UV light irradiation. The addition of ligands substantially enhanced the photothermal catalytic performance of the catalysts as verified by various characterizations. Subsequent experimental results under optimal conditions showed excellent yields of the catalysts for the conversion of epoxides with different groups to the corresponding cyclic carbonates. The cycling results also indicate good recyclability of the catalyst. This pathway in using light as a driving reaction to fix CO 2 for the synthesis of cyclic carbonate provides a new idea for subsequent photothermal catalytic fixation of CO 2 .
研究领域:
化学工程
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催化
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2025
·Vol. 15
·期 8
·732
·
IF 4
Jian Shi,Yao Xiao,Menghan Yu,Xiazhang Li
Accelerated industrialization and surging energy demands have led to continuously rising atmospheric CO2concentrations. Developing sustainable methods to reduce atmospheric CO2levels is crucial for achieving carbon neutrality. Concurrently, the rapid development of new energy vehicles has driven a significant increase in demand for lithium-ion batteries (LIBs), which are now approaching an end-of-life peak. Efficient recycling of valuable metals from spent LIBs represents a critical challenge. This study employs conventional hydrometallurgical processing to recover valuable metals from spent LIBs. Subsequently, Ni-doped Co3O4(Ni:Co3O4) supported on the natural mineral attapulgite (ATP) was synthesized via a sol–gel method. The incorporation of a small amount of Ni into the Co3O4lattice generates oxygen vacancies, inducing a localized surface plasmon resonance (LSPR) effect, which significantly enhances charge carrier transport and separation efficiency. During the photocatalytic reduction of CO2, the primary product CO generated by the Ni:Co3O4/ATP composite achieved a high production rate of 30.1 μmol·g−1·h−1. Furthermore, the composite maintains robust catalytic activity even after five consecutive reaction cycles.
研究领域:
环境科学
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材料科学
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催化
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能源技术
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xiangming Li,Bo Sun,Qingpeng Chen,Hiang Kwee Lee,Bo Shi,Hegang Ren,Haitao Li,Zequn Ma,Meng Fu
The reduction of 4-nitrophenol (4-NP) into 4-aminophenol (4-AP) is an important reaction in both chemical manufacturing and environmental protection. The design of a highly active, multifunctional and reusable catalyst for efficient 4-NP decontamination/valorization is therefore crucial to bring in economic and societal benefits. Herein, we achieve an efficient plasmonic-photothermal catalyst of Pd nanoparticles by growing them on graphene-polyelectrolytes self-assembly nanolayers via an in situ green reduction approach using polyelectrolyte as the reductant. The as-fabricated catalyst shows high catalytic behaviors and good stability (maintained over 92.5 % conversion efficiency after ten successive cycles) for 4-NP reduction under ultra-low catalyst dose. The rate constant and turnover frequency were calculated at 0.197 min −1 and 7.79 mmol g −1 min −1 , respectively, which were much higher than those of most reported catalysts. Moreover, the as-prepared catalyst exhibited excellent photothermal conversion efficiency of ∼77 % and boosted 4-NP reduction by ∼2-fold under near-infrared irradiation (NIR). This study provides valuable insights into the design of greener catalytic materials and facilitates the development of multifunctional plasmonic-photothermal catalysts for diverse environmental, chemical, and energy applications using NIR.
研究领域:
催化
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环境化学
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材料科学
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光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Jingwei Li,Jianrui Feng,Xiaomin Guo,Hongli Fang,Jiayi Chen,Churong Ma,Ruchun Li,Yuya Wang,Zebao Rui
This work reports a novel strategy to activate type III heterojunction through introducing defect sites at the interfaces and making use of the defect band as the bridge for storage, secondary excitation, and interband transfer of the photothermal induced charges for constructing two-component Type B heterojunction photothermocatalyst. Type III heterojunction WO 3−x /GdCrO 3 is activated by defect-band state W 5/4+ at WO 3−x interface under photothermal conditions, achieving efficient charge separation, high redox potential, and full visible light absorption. The as-bridged (or Type B) heterojunction WO 3−x -R/GdCrO 3 as non-noble metal catalyst demonstrates excellent photothermocatalytic performance in toluene degradation with a reaction rate five times higher than that of WO 3−x /GdCrO 3 with less interfacial defect sites as well as in CO 2 reduction with high CO and CH 4 yielding rates of 49.6 μmol g −1 h −1 and 18.5 μmol g −1 h −1 in gas-solid reaction system without sacrifice agent, evidently better than those reported in the literature.
研究领域:
材料科学
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催化
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环境科学
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化学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 38
·2105001
·
IF 18.808
Yushuai Xu,Jian Han,Yidong Luo,Yaochun Liu,Junping Ding,Zhifang Zhou,Chan Liu,Mingchu Zou,Jinle Lan,Ce-wen Nan,Yuanhua Lin
Gaseous CO 2 reduction driven by solar energy is a promising solution to the current energy crisis and environmental problems. Although thermocatalysts, electrocatalysts, and photocatalysts are developed as classical strategies for CO 2 reduction, it remains a challenge for high efficiency and CO 2 net reduction during this process. Here, a multi-field driven hybrid catalyst, Pt/ZnO nanorod arrays/Bi 1-x Er x CuSeO, is designed using the photo-thermoelectric effect, which can take advantage of both photocatalysis and thermocatalysis. The results indicate that the maximum CO production rate of 2.91 µmol g −1 h −1 at 423 K can be realized in such Pt/ZnONR/Bi 0.9 Er 0.1 CuSeO hybrid catalyst, as can be ascribed to a synergetic photo-thermoelectric effect (i.e., light irradiation can provide heat, photo-excited carriers, and the concomitant Seebeck voltage). The band alignment of ZnO/BiCuSeO heterojunction and carriers transport are proposed to be optimized by the Er doped BiCuSeO thermoelectric supports, greatly enhancing the catalytic performance. The application of thermoelectric support could be promising in the structure design of multi-field driven hybrid catalysts, and such a photo-thermoelectric catalytic process demonstrates a desirable way of solar energy utilization in CO 2 transformation.
研究领域:
材料科学
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催化
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可再生能源
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环境科学
✓ 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）