JOURNAL OF POWER SOURCES
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2016
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IF 6.333
Fanli Meng,Yi Luo,Yali Zhou,Jinwen Zhang,Yanzhen Zheng,Guozhong Cao,Xia Tao
A plasmon-enhanced upconversion composite Y 2 O 3 :Er/Au@TiO 2 (SYE/A@T) with a three-dimensional starlike morphology is prepared and then mixed with submicron TiO 2 (200 nm) to form a multifunctional scattering layer in TiO 2 -based dye-sensitized solar cells (DSSCs). In such starlike micronsized upconverter, Au nanoparticle-assisted plasmon effect can intensify the upconversion emission of Y 2 O 3 :Er, and simultaneously TiO 2 coating can improve the charge transport within SYE/A@T. Therefore, the SYE/A@T shows extended light-absorbing range to near-infrared region and improved light-scattering ability, leading to an improved photovoltaic performance of DSSCs. With the optimum mixing ratio, a conversion efficiency of 8.62% is attained, which is a significant improvement of 27.6% compared with the cell without adding SYE/A@T. Our work provides a feasible strategy to prepare an upconversion composite with plasmon-enhanced emission and enable this composite to accommodate the DSSCs system and improve the conversion efficiency of DSSCs.
研究领域:
材料科学
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光伏技术
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纳米光学
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能源材料
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表面等离激元
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2018
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IF 4.439
Yayuan Li,Shubo Cao,Ang Zhang,Chen Zhang,Ting Qu,Yongbin Zhao,Aihua Chen
It is of great importance to extend the UV response of anatase TiO 2 into the visible light range for the practical applications. Here, a facile rout to carbon and nitrogen co-doped, Au loaded bowl-like TiO 2 nanostructures with tunable size are proposed by using self-assembled polystyrene- block -poly(4-vinylpyridine) (PS- b -P4VP) block copolymer (BCP) spherical micelles as templates. Amphiphilic PS- b -P4VP self-assembles to form PS@P4VP core–shell spherical micelles with P4VP as the out layer in an evaporable mixed solvents of ethanol/tetrahydrofuran (THF). The size of uniform PS@P4VP spherical micelles can be precisely tuned in the range of a few nm to several hundred nm by controlling the molecular composition of the BCPs. Bowl-like TiO 2 nanostructures with a replicate size loaded with highly dispersed Au nanoparticles (NPs) of ∼5 nm in diameter are fabricated from these spherical micelles because of strong complex ability of pyridine groups. PS- b -P4VP provides carbon and nitrogen sources to dope the resulting samples simultaneously. The special carbon and nitrogen co-doped bowl-like Au/TiO 2 nanostructures exhibit much higher photocatalytic activity in the photodegradation of rhodamine B (RhB) compared to Au/P25 under visible light irradiation. Furthermore, the photocatalytic activity is significantly influenced by the BCP molecular composition due to different surface area and loading capacity of the resulting samples. This study provides a facile way to synthesize multi-element doped hollow or bowl-like nanoparticles with tunable size in the nanometer range which have potential application at photocatalysis, oxygen reduction reaction, etc.
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 CATALYSIS
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2022
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IF 8.047
Xiaowen Sun,Qing-Nan Wang,Shengyang Wang,Pengfei Zhang,Zhendong Feng,Xianwen Zhang,Zhaochi Feng,Can Li
Photocatalytic selective oxidation of p -xylene with O 2 offers a mild pathway to synthesize p -methyl benzaldehyde ( p -MBA), which is one of the primary precursors in the manufacture of fine chemicals. Here, we report that Au/WO x /TiO 2 photocatalyst selectively catalyzes the oxidation of p -xylene to p -MBA with 88.6% selectivity at 1.0% conversion, the formation of CO x is suppressed to 0.8%. Kinetic experiments indicate that p -methylbenzyl alcohol and p -MBA are initial products. p -Methylbenzyl alcohol is further oxidized to form p -MBA, p -methylbenzyl acid and CO x ; p -MBA is further oxidized to p -methylbenzyl acid and CO x . On TiO 2 surface, p -methylbenzyl alcohol is more prone to directly combust to CO x by O 2 – . Loading of WO x can weaken the adsorption ability of p -methylbenzyl alcohol on the catalyst surface to avoid the combustion. Meanwhile, WO x and Au can facilitate the separation of photo-generated carriers to attain high activity and suppress the O 2 – formation to obtain high selectivity.
研究领域:
催化
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材料科学
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化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Asim Mushtaq,Khai Ly Do,Muhammad Yousaf,Saiquan Li,Miao Su
Thermo-adaptive injectable silk-hydrogel conforms dynamically to irregular wound beds. • Au-TiO 2 /ICG nano-assemblies for image-guided localization • NIR-triggered hyperthermia/ROS generation synergistic antibacterial treatment • IVIS-guided tracking of the hydrogel's delivery and retention • Multifunctional platform helps improve wound repair with excellent biocompatibility. Infection and chronicity of wounds pose an intimidating problem in clinical practice, necessitating a system that would be able to dynamically adjust to the changes in the wound bed, delivering antibacterial effects and monitoring them simultaneously. Herein, a thermo-adaptive injectable hydrogel using Au–TiO 2 –PF127–ICG (ATI) nanocomposites loaded in a silk hydrolysate-PEG 400 -gelatin (SPG) matrix has been developed, integrating mechanical adaptability, phototherapy, biocompatibility, and imaging functionality in a single construct. The hydrogel is stable at room temperature while undergoing gel-sol phase transition at physiological temperature, thus allowing simple injection and in situ shaping within irregular wounds. Rheological analysis confirmed a distinct gel–sol transition near physiological temperature, validating its thermo-adaptive nature. Upon NIR 808 irradiation, the incorporated indocyanine green (ICG) efficiently converted light into heat, while the Au–TiO 2 nanocomposites along the ICG produced reactive oxygen species (ROS), resulting in a dual photothermal/photodynamic antibacterial effect against E. coli and S. aureus . Infrared thermal imaging and IVIS fluorescence visualization further confirmed localized photothermal responsiveness and sustained hydrogel retention at the wound site, enabling fluorescence-assisted image-guided localization and monitoring. Furthermore, in vivo studies revealed accelerated wound closure, enhanced collagen deposition, and favorable histological regeneration under NIR stimulation, signifying the hydrogel's regenerative potential. Overall, this ATI-SPG hydrogel demonstrates a harmonious combination of injectability, self-adaptivity, fluorescence-enabled image-guided localization, NIR-triggered multimodal antibacterial therapy, and wound healing capability, providing a promising platform for next-generation light-responsive materials for wound management.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Ming Yan,Yilin Wu,Xinlin Liu
Herein, Au-TiO 2 nanocomposite photocatalysts were initially constructed through a three-step-synthesis strategy including the sodium citrate reduction method, sol-gel method and high-temperature hydrothermal method . After that, Au-TiO 2 /PVDF photocatalytic nanocomposite membranes with visible light response were synthesized by a phase conversion process, thereinto, the Au-TiO 2 nanocomposite and PVDF powder were mixed into casting solutions by physical blending. Various characterization methods, such as SEM, TEM , FTIR, XRD , XPS , WCA and UV-vis DRS , etc., were used to systematically characterize the micromorphology, structural composition, wettability and optical properties of different samples. The UV-vis DRS results showed that the as-prepared nano-Au doping structure effectively enhanced the utilization factor of visible light in the process of photocatalytic degradation. The antifouling results of BSA adsorption experiments showed that 0.3-Au-TiO 2 /PVDF composite membranes possessed good antifouling performance. By analyzing the regeneration stability experiments, it could be found that the 0.3-Au-TiO 2 /PVDF composite membranes also exhibited excellent regeneration stability and easy separation and recovery features. The photocatalytic degradation of different membranes under visible light was investigated with tetracycline. The results showed that the photocatalytic degradation rate of 0.3-Au-TiO 2 /PVDF nanocomposite membranes reached 75% within 120 min. Moreover, the first-order kinetic linear fitting showed that the k value of 0.3-Au-TiO 2 /PVDF composite membranes was 0.01212 min −1 , which was 2.7 times and 2.0 times higher than that of 0.1-Au-TiO 2 /PVDF and 0.5-Au-TiO 2 /PVDF composite membranes. That is to say, photocatalytic activity of 0.3-Au-TiO 2 /PVDF composite membranes were obviously improved.
研究领域:
环境科学
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材料科学
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光催化技术
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Tianwei Dou,Yangyang Zhu,Zhanyu Chu,Lei Sun,Zhijun Li,Liqiang Jing
TiO 2 mesoporous hollow nanofibers with excellent mass diffusion is an attractive photocatalytic material to remove toxic gaseous pollutants like CO, while it is highly desired to improve the photogenerated charge separation and O 2 activation. Herein, the Au nanoparticles inner-loaded TiO 2 mesoporous hollow nanofibers (Au@TO MPHNFs) have been controllably fabricated by one-step coaxial electrospinning, in which it is crucial to use polyethyleneimine as porogen and stabilizer for mesoporous and TiO 2 in nanofibers shell. Concurrently, a stepwise phase transfer technique is employed to realize the uniform and stable dispersion of the Au in the paraffin oil as core precursor. The Au@TO MPHNFs exhibits 2.7 and 7.4-fold CO photooxidation enhancement compared with commercial P25 and TO MPHNFs, respectively. The enhanced photoactivity can be attributed to the creation of the mesoporous hollow structure for facilitating better mass transportation, and the incorporation of Au nanoparticles for efficient charge separation and O 2 activation. Meanwhile, the photothermal effect of Au expedites intermediaries transformation and product desorption.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
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IF 7.504
Chen Wang,Yilin Wu,Jian Lu,Juan Zhao,Jiuyun Cui,Xiuling Wu,Yongsheng Yan,Pengwei Huo
A bioinspired photocatalytic nanocomposite membrane was successfully prepared via polydopamine (pDA)-coated poly(vinylidene fluoride) (PVDF) membrane, as a secondary platform for vacuum-filtrated Au-TiO2 nanocomposites, with enhanced photocatalytic activity. The degradation efficiency of Au-TiO2/pDA/PVDF membranes reached 92% when exposed to visible light for 120 min, and the degradation efficiency of Au-TiO2/pDA/PVDF membranes increased by 26% compared to that of Au-TiO2 powder and increased by 51% compared to that of TiO2/pDA/PVDF nanocomposite membranes. The degradation efficiency remained about 90% after five cycle experiments, and the Au-TiO2/pDA/PVDF nanocomposite membranes showed good stability, regeneration performance, and easy recycling. The pDA coating not only served as a bioadhesion interface to improve the bonding force between the catalyst and the membrane substrate but also acted as a photosensitizer to broaden the wavelength response range of TiO2, and the structure of Au-TiO2/pDA/PVDF also improves the transfer rate of photogenerated electrons; the surface plasmon resonance effect of Au also played a positive role in improving the activity of the catalyst. Therefore, we believe that this study opens up a new strategy in preparing the bioinspired photocatalytic nanocomposite membrane for potential wastewater purification, catalysis, and as a membrane separation field.
研究领域:
环境科学
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材料科学
·
生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2026
·
IF 3.5
Qingmao Yang,Anyan He,Junyan Tan,Weichen Zhao,Haoyi Wu,Shengning Luan,Wei Feng,Chun Shen
Developing a novel EPCS combining GOase with Au/TiO 2 . • Achieving ∼92.3% DFF yield with ∼97.0% selectivity within 2 h in pure water. • The by-product H 2 O 2 is in-situ decomposed into O 2 by Au/TiO 2 . • •OH, •O 2 – and O 2 precisely required for GOase activation generated by Au/TiO 2 . 2,5-Diformylfuran (DFF), as the oxidation product of the biomass platform molecule 5-hydroxymethylfurfural (HMF), has attracted considerable attention because of its broad utility as a precursor for pharmaceuticals, renewable polymers, and other functional products. Efficient oxidation of HMF into DFF through biocatalysis in pure water is extremely desirable but still faces significant challenges: complex multi-enzyme systems and low reaction efficiency. Herein, we develop a novel enzyme-photo-coupled catalytic system (EPCS) combining GOase with Au/TiO 2 photocatalyst, achieving “waste-to-wealth”. The mechanism study reveals that the Au/TiO 2 acts as the role of “killing two birds with one stone”: in-situ decomposing inhibitory H 2 O 2 by-product into O 2 and H 2 O, thereby mitigating enzyme inhibition; and ingeniously generating reactive oxygen species (ROS) (hydroxyl radicals (·OH) and superoxide radicals ( )) and regenerative O 2 that precisely are required for GOase activation. Under visible light conditions, the EPCS achieves (92.3±1.4)% DFF yield with (97.0±0.8)% selectivity within 2 h, significantly outperforming the single enzyme system (DFF yield: (40.9±2.4)%). The “green chemistry” concept is implemented in the EPCS, which provides a generalizable strategy for developing efficient, green, and concise oxidation systems by turning a toxic by-product into catalytic promoters. Download: Download high-res image (335KB) Download: Download full-size image
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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）