JOURNAL OF MOLECULAR LIQUIDS
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2022
·
IF 6.633
Kejie Jin,Mian Qin,Xinyi Li,Rui Wang,Yang Zhao,Huan Wang
Semiconductor photocatalysis can be regarded as one of effective strategies to overcome the great challenges encountered with conventional technologies for environmental remediation. In this research, Z-scheme heterostructure composed of core–shell Au@TiO 2 nanoparticles and flower-like Bi 2 WO 6 nanosheets has been successfully prepared through the reverse micelle sol–gel method followed by a hydrothermal process. The structural characteristics, chemical compositions and photoelectrochemical properties of this ternary composite photocatalyst (Au@TiO 2 /Bi 2 WO 6 ) were further investigated in detail. Benefitted from the synergy of the heterojunction construction and metallic surface plasmon resonance effect, the Au@TiO 2 /Bi 2 WO 6 with an optimal mass ratio of Au@TiO 2 to Bi 2 WO 6 exhibited the significantly enhanced photocatalytic activity for degradation of antibiotics under visible-light irradiation, in which the degradation efficiency of sulfamethoxazole (SMX) and tetracycline hydrochloride (TC) could be up to 96.9% and 95.0% within 75 min, respectively. The reaction rate constant for SMX and TC degradation was calculated to be around 0.0425 min −1 and 0.0314 min −1 , which has 7.2 times and 1.9 times enhancement compared with single Bi 2 WO 6 , respectively. In addition, the cyclic stability and photocatalytic mechanism of Au@TiO 2 /Bi 2 WO 6 were further verified. Our primary results provide a feasible strategy to develop core–shell heterostructured photocatalysts with superior performance for the efficient removal of low-concentration antibiotics in water.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Suqing Peng,Weilin Zhong,Hailun Zhao,Chao Wang,Zhipeng Tian,Riyang Shu,Ying Chen
Photocatalytic hydrogen production and thermal storage are effective ways to convert solar energy into storable chemical energy and thermal energy , but they only respond to specific spectrum. In order to improve the energy conversion and storage efficiency of solar energy in the solar spectrum, hydrothermal and photo-deposition method were employed to synthesized photothermal catalyst while and Au/TiO 2 @PCM composite microcapsules were fabricated by electrostatic adsorption self-assembly methods. Micro-morphologies and structures were detailed characterized by SEM , XRD , UV-Vis, etc. As calculated from the DSC results for effective, enthalpy value , the loading rates of Au/TiO 2 shell for the microcapsule were 12.6% and 15.4% corresponding to rod-shaped and sheet-shaped samples. To test their catalytic performance, the samples were dispersed in the same concentration of glycerol solution, and showed that the light to hydrogen efficiencies were 11.4‰ and 5.0‰ for ATR@PCM and ATF@PCM, respectively with the increasement of 53.8% and 56.1% comparing to their corresponding catalyst nanoparticle suspensions. Photo-thermal conversion efficiencies of ATR@PCM and ATF@PCM were 62.74% and 53.32% after 60 min-irradiations, and they were 48.22% and 25.96% higher than that of Me-PCM. Therefore, it was confirmed that the composite phase change microcapsules prepared in this study have the dual functions of energy storage and photothermal catalysis. Higher solar light to hydrogen energy conversion efficiency may be attained in future study if the stored thermal energy can be successfully employed to activate organic components for helping catalytic hydrogen generation .
研究领域:
材料科学
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能源化学
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DOI
高影响因子
ENERGY CONVERSION AND MANAGEMENT
·
2016
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IF 4.801
Jian Huang,Yurong He,Li Wang,Yimin Huang,Baocheng Jiang
With water scarcity becoming an increasingly critical issue for modern society, solar seawater desalination represents a promising approach to mitigating water shortage. In addition, solar seawater desalination shows great potential for mitigating the energy crisis due to its high photo-thermal conversion efficiency. However, the increasing contamination of seawater makes it difficult to generate clean water through simple desalination processes. In this work, clean water is generated by a newly designed bifunctional Au@TiO 2 core-shell nanoparticle film with a high photo-thermal conversion efficiency that is capable of photocatalysis and solar evaporation for seawater desalination. Bifunctional films of Au@TiO 2 core-shell nanoparticles with good stability were prepared. It was found that the formation of the core-shell structures played a key role in promoting the photo-thermal conversion efficiency and the evaporation of seawater, while the photocatalytic function demonstrated herein could contribute to the purification of polluted seawater. Furthermore, the film structure can serve to concentrate the NPs for the photo-reaction, as well as heat for water evaporation, improving both the photo-reaction efficiency and photo-thermal conversion efficiency. This efficient approach to solar seawater desalination, which combines evaporation with the photodegradation of pollutants, could help to address the dual issues of water scarcity and water pollution.
研究领域:
材料科学
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环境工程
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纳米技术
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太阳能利用
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水净化
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DOI
高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
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2016
·Vol. 34
·期 3
·1600323
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IF 4.367
Liwei Zhao,Hongbo Xu,Bo Jiang,Yudong Huang
Recently, there is crucial interest in the design and fabrication of nanocatalysts for efficient decomposition of organic pollutants in wastewater using visible light. This work reports the assembling fabrication of synergetic photocatalytic Au/TiO 2 /RGO nanostructures by utilizing the reduced graphene oxide (RGO) as substrate material and efficient separator for electrons and holes. The Au/TiO 2 nanostructures with a ≈7 nm TiO 2 particles size are dispersed uniformly on RGO nanosheets. UV–vis diffuse reflectance spectroscopy verifies that Au/TiO 2 /RGO nanocomposites show strong absorption of visible light. The degradation efficiency after 1 h for hydroquinone under visible light and UV light is ≈77% and ≈90%, respectively. Under visible light, the calculated apparent rates ( k ) of the Au/TiO 2 /RGO nanocomposites are 0.0112 and 0.0174 min −1 for decomposition of methylene blue and hydroquinone. That are five times greater than that of bare TiO 2 . The high photocatalytic activity is mainly attributed to the synergy between RGO and Au/TiO 2 nanostructure. The strategy of composite nanostructures assembling on RGO is ensured to have a great practicable potential for the designing of high efficient multielement composite nanoparticles catalysts.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Jin Wang,Zhongyan Gong,Yulong Zhang,Yaxin Song,Xinya Chen,Zhihao Lu,Lu Jiang,Chengcheng Zhu,Kun Gao,Kaili Wang,Junjie Wang,Liuyingzi Yu,Soukaina Khayour,Haijiao Xie,Zhuoyao Li,Gang Lu
Electrocatalytic hydrogen evolution reaction (HER) is receiving increasing attention as an effective process to produce clean energy. The commonly used precious metal catalysts can be hybridized with semiconductors to form heterostructures for the improvement of catalytic efficiency and reduction of cost. It will be promising to further improve the efficiency of heterostructure-based nanocatalysts in electrocatalytic and photocatalytic HER using a simple and effective method. Herein, we improve the efficiency of Au/TiO2 in electrocatalytic and photo-electrocatalytic HER by selectively adsorbing p-aminothiophenol (PATP) molecules. The PATP molecules are adsorbed on the gold surface by using a simple solution-based method and favor the charge separation at the Au–TiO2 interface. We also compare the PATP molecules with other thiophenol molecules in the enhancement of electrocatalytic HER. The PATP-induced enhancement in electrocatalysis is then further investigated by density functional theory (DFT) calculations, and this enhancement is attributed to a reduction in Gibbs energy of adsorbed hydrogen after surface adsorption of PATP molecules. This work provides a simple, cost-effective, and highly efficient approach to improve the electrocatalytic and photo-electrocatalytic efficiency of Au/TiO2, and this approach could be easily extended to other heterostructure-based nanocatalysts for performance enhancement and may be used in many other catalytic reactions.
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DOI
PubMed
高影响因子
Advanced Materials Interfaces
·
2016
·Vol. 3
·期 22
·1600588
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IF 3.365
Huimin Shi,Xuejiao Wang,Mengjie Zheng,Xing Wu,Yiqin Chen,Zhengmei Yang,Guanhua Zhang,Huigao Duan
Rational engineering hierarchical 3D nanostructures with high visible-light photocatalysis and long-term cycling stability are of great importance in environmental purification and energy conversion. A novel and scalable approach is demonstrated to fabricate hierarchical plasmon-resonance-induced black Au–TiO 2 nanorod arrays (NRAs) on flexible carbon cloth (CC). With the advantages of hierarchical morphology, plasmon-enhanced visible-light absorption, facile charge separation enabled by single-crystalline TiO 2 and conductive substrate, the black Au–TiO 2 NRAs on CC show more than 13 times higher visible-light photocatalytic efficiency enhancement compared to that of bare TiO 2 NRAs. Meanwhile, the hybrid Au–TiO 2 –C system shows extremely high chemical and mechanical stability. The visible-light photocatalysis does not show any decrease after consecutive seven times test. More remarkably, after being continuously stirred in aqueous solution for 60 d, almost no decrease of photocatalytic activity is observed. The UV–vis absorption measurement, optical simulations, and the control experiment on hierarchical Au–SiO 2 @TiO 2 NRAs reveal that the enhanced visible-light photocatalysis is caused by the plasmon-induced hot-electrons transfer from Au nanoparticles to neighboring TiO 2 NRAs. The high visible-light photocatalytic performance and the excellent chemical/mechanical stabilities imply that the black Au–TiO 2 NRAs on CC can serve as potential photocatalytic materials for large-scale applications in energy conversion and pollutants purification.
研究领域:
材料科学
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环境科学
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纳米技术
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DOI
高影响因子
ChemNanoMat
·
2026
·Vol. 12
·期 1
·e202500720
·
IF 2.6
Xinbing Jiang,Xingyu Jin,Zizhuo Nie,Wenyu Cheng,Yuxi Fei,Bo Peng,Yuhang Liu,Jiuhong Wang,Libo Zhao,Shujiang Ding
Room-temperature ammonia (NH 3 ) detection is crucial for environmental safety and human health. In this study, a ternary PANI@Au-TiO 2 ammonia-sensitive composite was synthesized via in situ polymerization of polyaniline (PANI) with simultaneous reduction of chloroauric acid to form Au nanoparticles, followed by ultrasonic compounding with TiO 2 nanoparticles. The structural and morphological characterization confirmed the uniform distribution of Au and TiO 2 nanoparticles in the PANI matrix. Gas sensing experiments demonstrated that the PANI@Au-TiO 2 sensor exhibited markedly enhanced NH 3 response, achieving a high sensitivity of 0.0527/ppm compared to PANI, PANI@Au, and PANI-TiO 2 counterparts. Moreover, the PANI@Au-TiO 2 ternary composite sensor displayed excellent linearity within the NH 3 concentration range of 3–30 ppm, along with a low detection limit, good repeatability, and high selectivity toward ammonia. The enhanced performance is attributed to the synergistic effects of the p–n heterojunction, Schottky junction, and catalytic activity of Au nanoparticles, which facilitate efficient charge transfer and amplify the interaction with NH 3 molecules. These findings demonstrate that the hybrid sensing film based on PANI@Au-TiO 2 ternary composites exhibits excellent ammonia detection performance at room temperature, thereby offering a promising pathway for the development of advanced ammonia sensors.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
·
IF 9.6
Cong Liu,Qing-shan Wang,Heng-fei Cui,Hao-wen Zhu,Ming-yang Liu,Rui-tang Guo
The highly selective generation of products in the photoelectrocatalytic (PEC) CO 2 reduction reaction is significantly hindered by the complex multi-electron transfer process. In this work, we designed and synthesized a Cu 2 O-Au@TiO 2 composite with a unique “core–shell–satellite” architecture via a facile wet-chemical approach. In this architecture, the Au nanocore strengthens visible-light harvesting through localized surface plasmon resonance (SPR) and injects hot electrons into the mesoporous TiO 2 shell, while the outer Cu 2 O selectively exposes highly active (111) facets and establishes low-mismatch interfaces with TiO 2 . This configuration promotes directional charge migration through virus-like synaptic channels, thereby accelerating multi-electron CO 2 reduction. The cooperative mechanism of SPR enhancement, crystallographic facet matching, and dynamic charge transfer enables efficient and selective conversion of CO 2 to C 2 H 4 . Under visible-light irradiation and applied potential, the optimized composite achieves a remarkable C 2 H 4 yield of 174 ± 3.2 μmol·cm −2 ·h −1 with a sustained current density exceeding 75 mA·cm −2 . These findings highlight a rational structural design that synergistically couples plasmonic excitation with interfacial charge management, establishing a promising paradigm for developing high-performance photoelectrocatalytic systems toward solar-driven CO 2 reduction.
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DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Yunyang Wang,Changzhu Yang,Ayan Chen,Wenhong Pu,Jianyu Gong
Core-shell and yolk-shell Au@TiO 2 NPs were successfully synthesized, and the morphology differences were observed. Its photocatalytic activity was evaluated by photocatalytic oxidation of gaseous toluene under visible light illumination. The results indicated that yolk-shell Au@TiO 2 exhibited superior photocatalytic properties and demonstrated a good stability. Almost 57.3% of gaseous toluene was removed over 0.14 at% yolk-shell Au@TiO 2 in 3 h. It could also be reused for several times without corrosion. Furthermore, the comprehensive effect of LSPR response of Au, high cavity volume of yolk-shell structure, larger specific surface area, more mesoporous and the existence of Ti 3+ were all benefit for the photocatalytic process. ESR tests also confirmed that h + , OH, O 2 − and Ti 3+ generated from yolk-shell Au@TiO 2 were the main active species in the photocatalytic degradation progress of gaseous toluene under visible light irradiation.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2017
·Vol. 123
·期 8
·1-9
·
IF 1.455
Feng Cong,Yu Zhichao,Liu Hongjing,Yuan Kangkang,Wang Xinqiang,Zhu Luyi,Zhang Guanghui,Xu Dong
The drawback of using TiO 2 in photocatalytic applications lies in the wide band gap and high recombination rate of charge carriers. To solve the above problems, modification of TiO 2 with Au nanoparticles (NPs) has received considerable attention. Here, TiO 2 nanofibers uniformly deposited with Au NPs which have a narrow size distribution (16 nm) were synthesized. We demonstrate that the photocatalytic performance of Au/TiO 2 heterostructured nanofibers can be effectively enhanced under UV and visible light irradiation by manipulating the dosage of decorated Au NPs. The effect of metal dosage on the photocatalytic performance has been systematically investigated. The enhanced photocatalytic properties are ascribed to the increase of visible light absorption from the Au NP’s surface and the enhancement of separation of electron–hole charge pairs at the interface of Au/TiO 2 junctions. Besides, the decrease of photoactivity with more addition of Au NPs is due to the fact that redundant Au NPs reduce the photon flux reaching the TiO 2 surface and also act as recombination centers for electron–hole pairs. The present work provides guidance toward the fabrication of more efficient Au/TiO 2 photocatalysts.
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 Energy & Environment
·
2021
·
IF 8.207
Weiyao Yang,Mengchen Fu,Chenyu Yang,Yiwen Zhang,Chun Shen
Despite wide applications of noble metal-based catalysts in 5-hydroxymethylfurfural (HMF) oxidation, promoting the catalytic performance at low loading amounts still remains a significant challenge. Herein, a series of metal oxide modified MO x -Au/TiO 2 (M = Fe, Co, Ni) catalysts with low Au loading amount of 0.5 wt% were synthesized. Addition of transition metal oxides promotes electron transfer and generation of the Au δ − –O v –Ti 3+ interface. A combination study reveals that the dual-active site (Au δ − -O v -Ti 3+ ) governs the catalytic performance of the rate-determining step, namely hydroxyl group oxidation. Au δ − site facilitates chemisorption and activation of O 2 molecules. At the same time, O v -Ti 3+ site acts as the role of “killing two birds with one stone”: enhancing adsorption of both reactants, accelerating the activation and dissociation of H 2 O, and facilitating activation of the adsorbed O 2 . Besides, superoxide radicals instead of base is the active oxygen species during the rate-determining step. On this basis, a FDCA yield of 71.2% was achieved under base-free conditions, complying with the “green chemistry” principle. This work provides a new strategy for the transition metal oxides modification of Au-based catalysts, which would be constructive for the rational design of other heterogeneous catalysts.
研究领域:
催化化学
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材料科学
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环境科学
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DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 14
·3816
·
IF 3.623
Xiaojie Li,Xin Li,Pei Zuo,Xiaozhe Chen,Misheng Liang,Le Ma
TiO2is popular in photocatalytic degradation dye pollutants due to its abundance and its stability under photochemical conditions. Au loaded TiO2can achieve efficient absorption of visible light and deal with the problem of low conversion efficiency for solar energy of TiO2. This work presents a new strategy to prepare Au nanoparticles-loaded TiO2composites through electric−field−assisted temporally−shaped femtosecond laser liquid-phase ablation of Au3+and amorphous TiO2. By adjusting the laser pulse delay and electric field parameters, gold nanoparticles with different structures can be obtained, such as nanospheres, nanoclusters, and nanostars (AuNSs). AuNSs can promote the local crystallization of amorphous TiO2in the preparation process and higher free electron density can also be excited to work together with the mixed crystalline phase, hindering the recombination between carriers and holes to achieve efficient photocatalytic degradation. The methylene blue can be effectively degraded by 86% within 30 min, and much higher than the 10% of Au nanoparticles loaded amorphous TiO2. Moreover, the present study reveals the crystallization process and control methods for preparing nanoparticles by laser liquid ablation, providing a green and effective new method for the preparation of high-efficiency photocatalytic materials.Keywords:electric-field-assisted;femtosecond laser;Au@TiO2composites;photocatalytic degradation
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）