APPLIED SURFACE SCIENCE
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2021
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IF 6.707
Yue Tian,Qingqiang Cui,Hui Ma,Anxin Jiao,Chang Wang,Mengya Zhang,Linqi Zheng,Xuelin Wang,Shuang Li,Guihua Li,Ming Chen
Based on plasmonic metallic nanomaterials (NMs) with unique local surface plasmon resonance (LSPR), the photo-excited hot carrier-driven hydrogenation reaction becomes a new family of photocatalytic transformations in recent years. However, the high work function and rapid hot-carrier recombination of plasmonic NMs create huge barriers for widespread practical application. Herein, we propose a fascinating reactor of up-regulated electrochemical LSPR (EC-LSPR) driven hydrogenation reaction via the construction of hierarchical Au pine needles (H-Au PNs) with enhanced lightning rod effect under appropriate extra electric field. The plentiful elongated Au branches with sharp corners and edges can be served as excellent electron-transport channels for facilitating photo-excited hot carrier transmission and accelerating hot electron collection at nano-tips after plasmon decay. Additionally, the extra electric field with the applied voltage of − 0.8 V further improves the surface charge density and the internal polarization of H-Au PNs, boosting the separation efficiency of hot carriers as well as reducing the photoelectrochemical (PEC) potential on H-Au PNs. It directly leads to an effective activation enthalpy reduction to reach above the energy threshold of water splitting, which can achieve the direct plasmon-driven PEC-hydrogenation conversion of 4-nitrothiophenol (4-NTP) to 4-aminothiophenol (4-ATP) in aqueous solution, and the conversion rate constant is about 5 times higher than bare EC-driven conversion. The present work provides a new opportunity for the emerging direct plasmon-driven hydrogenation reaction.
研究领域:
材料科学
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化学
✓ 已验证
DOI
高影响因子
ACS Sensors
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2019
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IF 6.944
Ziting Qian,Jiayuan Fei,Shenfei Zong,Kuo Yang,Lang Li,Ruiyang Liu,Zhuyuan Wang,Yiping Cui
A multifunctional microfluidic platform was demonstrated to monitor the interaction between tumor cells and endothelial cells by integrating a three-dimensional (3D) cell culture unit with a protein detection unit. In such a chip, breast cancer cells MCF7 were seeded into the collagen to form a 3D tumor environment while human umbilical vein endothelial cells (HUVECs) are seeded in the channel next to the collagen matrix. Thus, an in situ growth of angiogenic sprouting can be visualized through fluorescence in the 3D collagen matrix after a coculture of MCF7 and HUVEC after 4 days, which cannot be observed in the 2D culture environment. On the other hand, gold@silver core–shell nanorods were used as surface-enhanced Raman scattering (SERS) immunoprobes for the detection of the secretion of cytokine (vascular endothelial growth factor, VEGF). The limit of detection of the VEGF is 100 pg/mL. Further, as LiCl and bevacizumab can act as a promoter and an inhibitor of VEGF, the dynamic change of the concentration of VEGF under the stimulation of them was monitored by SERS signals. Thus, this integrated SERS microfluidic platform creates opportunity for the fundamental research of interaction between tumors and endothelial cells.
研究领域:
生物医学工程
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癌症研究
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微流控技术
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表面增强拉曼散射(SERS)
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细胞生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Kaiyue Li,Wenhui Li,Ping Huang,Yuquan Zhuo,Ziwen Yang,Bo Wang,Runru Liu,Bing Liu,Enzhu Hou,Shuo Yang,Donglai Han
To address the challenge of achieving simultaneous pollutant removal and real-time monitoring in water remediation, Z-scheme Cu 2 O/g-C 3 N 4 /Ag heterostructures with integrated functionalities for synergistic adsorption, photocatalytic degradation, and surface-enhanced Raman scattering (SERS) detection were developed—hereafter referred to as APS-Hs (adsorption–photocatalysis–SERS heterostructures). Particular emphasis was placed on the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs, incorporating an optimized 1.5 wt% Ag loading. Optical and electrochemical tests demonstrated that the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs significantly enhanced charge separation efficiency and reduced charge transfer resistance. Under visible-light irradiation, the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs attained a removal efficiency of 98.1 % for methyl orange (MO) within 45 min and sustained an efficiency of 84.0 % after three consecutive cycles. XRD and SEM analyses conducted before and after photocatalytic cycling confirmed the composite's outstanding structural and morphological stability. Notably, the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs demonstrated the highest adsorption capacity (21.34 mg/g) among all samples. Zeta potential measurements revealed a surface charge reversal from + 22.35 mV to −10.29 mV, indicative of strong electrostatic interactions with anionic pollutants. Pseudo-second-order (PSO) kinetic modeling (R 2 =0.971) further established physisorption as the dominant mechanism. Radical trapping experiments verified that the enhanced photocatalytic performance originates from the Z-scheme charge transfer pathway. Additionally, the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs substrate achieved a SERS enhancement factor of 3.1 × 10 6 and a broadband self-cleaning capability, underscoring its potential for integrated environmental remediation and sensing applications.
研究领域:
环境科学
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材料科学
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水处理
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纳米技术
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Likun Han,Huan Liu,Jinjie Zhang,Jun Zhou,Tao Jiang
Constructing of plasmonic substrate with the capability of detecting nutritional food quality will soon be emerged as the frontier research directions with broad prospects in surface-enhanced Raman scattering (SERS) technology ascribed to an improvement of living standards. Herein, a novel TiO 2 framework with a shrubby morphology was successfully constructed on carbon cloth (CC) matrix to trigger significantly enhanced electromagnetic “hotspots” after dense Ag network with numerous sharp corners and edges was formed by a photo-induced reduction. Particularly, the structure-dependent optical performance was investigated for these as-prepared CC/TiO 2 /Ag hybrid substrates, screening out an optimal one with an enhancement factor of 6.38 × 10 7 . Regarding a prominent photocatalytic efficiency ascribed to the high electron-hole separation efficiency assisted by the CC matrix and Ag decoration, a recyclable SERS-based monitoring of quercetin (QR) was achieved in teas, demonstrating recovery values distributed from 88.9 % to 106.4 %. The strategy proposed here opened a new way to create high-density “hotspots” for multifunctional SERS substrates, which might play a crucial role in food quality monitoring applications.
研究领域:
材料科学
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纳米技术
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食品科学
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分析化学
✓ 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）