Scientific Reports
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2026
·
IF 4.9
Wang Jinghan,Hou Peng,Yao Qingwei,Fu Shuang,Chao Liyuan,Sui Huimin,Han Lu,Wang Jiafeng,Wang Guowei,Zhang Hongguang
Surface-enhanced Raman scattering (SERS) technology has emerged as a powerful analytical tool for trace-level environmental pollutant detection, with its performance critically dependent on the physicochemical properties of substrate materials. While noble metal substrates (e.g., Au/Ag) demonstrate superior SERS enhancement through surface plasmon resonance (SPR), their practical deployment is hampered by inherent limitations including high material costs and susceptibility to oxidation-induced degradation. Herein, we report the rational design of Ag 2 O/TiO 2 composite substrates via a facile wet-chemical precipitation method, wherein Ag 2 O nanoparticles are uniformly decorated onto pre-synthesized TiO 2 nanospheres. Upon application in crystal violet (CV) detection, the optimized Ag 2 O/TiO 2 composite substrate exhibits remarkable SERS performance with an enhancement factor (EF) of 6.7 × 10 6 and an ultra-low detection limit (LOD) of 1.0 nM (1.0 × 10⁻ 9 M). Systematic investigations reveal that the Ag 2 O modification induces photogenerated electron accumulation on the TiO 2 surface, promoting photoinduced charge transfer (PICT) between the substrate and adsorbed CV molecules. This work not only presents a cost-effective and stable SERS platform for environmental contaminant monitoring but also provides mechanistic insights into the rational engineering of semiconductor-based SERS substrates with enhanced sensitivity and durability.
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DOI
PubMed
高影响因子
VACUUM
·
2024
·
IF 3.8
Xianjie Tang,Guoyou Gan,Xianglei Yu,Zhuo Qian,Junpeng Li
Silver nanowire transparent electrodes (TCEs) are promising candidates for various applications. This is because of their excellent optoelectronic properties and thermal conductivity . However, the mechanical characteristics of silver nanowires (AgNWs) are not very prominent. In recent years, metal oxide surface modifications have been used to enhance the properties of AgNWs. Meanwhile, most of them have aimed at improving the macroscopic parameters, making little mention of theoretical guidance concerning the modification mechanism and bonding mode. To address this issue, composites of Ag 2 O nanoparticles grown on the surface of PVP@AgNWs were prepared in the present work through a straightforward liquid-phase synthesis approach, while guaranteeing the initial dispersion. The mechanism of the sodium borohydride (NaBH 4 ) modifier on the surface of PVP@AgNWs and the growth mode between Ag 2 O and the PVP@AgNWs surface were analyzed using XPS , TEM , and other characterization techniques. This supports the subsequent introduction of metal oxide nanoparticles to modify AgNWs.
研究领域:
材料科学
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纳米技术
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表面化学
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光电学
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DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2023
·
IF 3.9
Wanyi Tao,Bo Zhang,Luxia Yin,Xiao Teng,Zhang Wen,Zekai Zhang,Wensheng Ning
Fabrication of adsorbent can play an important role in the adsorption desulfurization technology as a most promising deeply desulfurization technology. Ag 2 O/CeO 2 /SiO 2 aerogel composites were synthesized, where the easy oxidation of Ce 3+ into Ce 4+ was realized by adding hydrogen peroxide, and were utilized to remove thiophenics from model fuels and aromatics. Compared with Ag 2 O/SiO 2 and CeO 2 /SiO 2 , the adsorption uptake and solvent washing regeneration performance of Ag 2 O/CeO 2 /SiO 2 for thiophene was obviously enhanced, and the adsorption selectivity for thiophene in the presence of aromatics was relatively close to CeO 2 /SiO 2 , attributed to that Ag 2 O/CeO 2 /SiO 2 adsorbed thiophenics via the π-Ag + complexation and S-Ce bonding, where the latter was main interaction. However, there was no synergistic interaction between Ag and Ce species acted as adsorption sites in the Ag 2 O/CeO 2 /SiO 2 , which could be supported by that the chemical state of Ag and Ce in Ag 2 O/CeO 2 /SiO 2 was consistent with corresponding one in Ag 2 O/SiO 2 and CeO 2 /SiO 2 , respectively. Among Ag 2 O/CeO 2 /SiO 2 aerogel composites with different molar ratios of Si/Ce, Ag 2 O/CeO 2 /SiO 2 -50 performed the best, its adsorption uptake for thiophene, benzothiophene and dibenzothiophene from model fuels arrived at 20.4, 21.8 and 27.2 mg-S/g ads , respectively. Langmuir and Freundlich adsorption isotherm models, the pseudo-second-order kinetic model could well describe the adsorption of thiophenics over Ag 2 O/CeO 2 /SiO 2 -50.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
CHEMICAL PHYSICS
·
2024
·
IF 2
Xing-Fei Guo,Quan Li,Hai-Tao Ren,Jing Wang,Xu Han
Mesoporous TiO 2 with a homogeneous Bi-Ag bimetallic distribution (Bi@Ag@MTs) can be obtained by calcination of a titanium-based metal organic framework (MOF, MIL-125) with Bi and Ag loading and applied to the photocatalytic reduction of nitrate using formic acid as a hole scavenger. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM) and energy dispersive spectrometer (EDS) analyses show that Ag(I) and Bi(III) are present in MTs as fine clusters and Bi@Ag@MTs have a specific pancake structure, which provides a good carrier for photocatalytic reaction. The contents of Ag and Bi in Bi@Ag@MTs can be up to 2.28 wt% and 0.54 wt% analysed by Inductively Coupled Plasma-Optical Emission Spectrometer (ICP-OES). Under UV irradiation, Bi@Ag@MTs(0.2,0.4) showed a high reduction rate (3.28 h −1 , 4.2 times that of P25), high conversion (100 %, 1.3 times that of P25) and high N 2 selectivity (89.2 %, 2.1 times that of P25) for nitrate reduction. In addition, Bi@Ag@MTs(0.2,0.4) showed good reusability, with the respective NO 3 − conversion and N 2 selectivity still reaching 82.2 % and 78.0 % after four cycles. X-ray photoelectron spectroscopy (XPS) analysis showed that under UV irradiation, part of Ag(I) would be reduced to Ag 0 , and the formed Ag-Ag 2 O structure helped to improve the photocatalytic activity of the catalyst. This preparation strategy provides assistance in the design of photocatalytic materials with significant activity and durability for nitrate reduction.
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
Scientific Reports
·
2021
·Vol. 11
·期 1
·1-9
·
IF 4.38
Li Danqing,Chen Shuai,Zhang Ke,Gao Nan,Zhang Miao,Albasher Gadah,Shi Jiangfan,Wang Chuanyi
Silver-based antibacterial agents have obtained wide attention due to the fact that bacteria in the environment is ubiquitous, which has become one of the most difficult problems for human health. However, the antibacterial mechanism and process are still inconclusive. Here, Ag 2 O nanoparticles (NPs) with uniform spherical morphology and small size (around 30 nm) were prepared. The as-prepared Ag 2 O NPs induced high antibacterial activity (100% inhibition ratio) against E. coli . A two-step antibacterial process was proposed and confirmed, which divided into inhibition and sterilization steps. The optical density measurement, malondialdehyde concentration detection, morphologic imaging with electronic microscopy and Fourier transform infrared spectroscopic analysis unveiled the interaction of Ag 2 O NPs with E. coli , which verified the inhibition–sterilization process we proposed.
研究领域:
纳米技术
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微生物学
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材料科学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Jiaolai Jiang,Yunfeng Du,Hui Deng,Zhengjun Zhang,Shaofei Wang,Haoxi Wu,Hao Tang,Wen Yun,Jun Zhang,Weibo He,Lang Shao,Junsheng Liao
The rapid and efficient identification of uranium oxides is of great significance in the field of nuclear security. A feasible SERS strategy assisted by Ag 2 O for rapid detection of trace amount of uranium oxides (∼1.8 μg/mL for UO 2 and ∼ 3.6 μg/mL for U 3 O 8 ) was proposed and described. The effects of laser power on the Raman and SERS of uranium oxides were investigated. And the SERS mechanism was discussed by constructing several types of SERS substrates. Uranyl ions produced from hydrolysis and oxidation of uranium oxides are the key components for their SERS, where efficient photoinduced charge transfer process from Ag 2 O to uranyl ions occurs, resulting in a more intense Raman mode. The easily obtained but clearly distinguished SERS signals allow us to selectively and quickly detect the uranium oxides from mixtures, which may be practically applied to nuclear antiterrorism.
研究领域:
核安全
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分析化学
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材料科学
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DOI
高影响因子
CHEMPHYSCHEM
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2017
·Vol. 18
·期 22
·3182-3188
·
IF 3.075
Xue-Dong Li,Qing-Wen Song,Xian-Dong Lang,Yao Chang,Liang-Nian He
Graphical Heterocycle promotion : An Ag 2 O/TMG (1,1,3,3-tetramethylguanidine) promoted substrate-driven and divergent route leads to a variety of heterocycles from propargyl alcohols, CO 2 , and 2-aminoethanols with turnover numbers up to 1260. The reaction proceeds through a cascade pathway with α-alkylidene cyclic carbonate as the intermediate. Chemical valorization of CO 2 to access various value-added compounds has been a long-term and challenging objective from the viewpoint of sustainable chemistry. Herein, a one-pot three-component reaction of terminal propargyl alcohols, CO 2 , and 2-aminoethanols was developed for the synthesis of 2-oxazolidinones and an equal amount of α-hydroxyl ketones promoted by Ag 2 O/TMG (1,1,3,3-tetramethylguanidine) with a TON (turnover number) of up to 1260. By addition of terminal propargyl alcohol, the thermodynamic disadvantage of the conventional 2-aminoethanol/CO 2 coupling was ameliorated. Mechanistic investigations including control experiments, DFT calculation, kinetic and NMR studies suggest that the reaction proceeds through a cascade pathway and TMG could activate propargyl alcohol and 2-aminoethanol through the formation of hydrogen bonds and also activate CO 2 .
研究领域:
有机化学
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绿色化学
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2018
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IF 3.057
Tian Zhao,Qingshan Zhu,Ran Xu,Jingjing Tian,Yujun Feng
Antiferroelectric ceramics are superior energy storage materials with high energy storage densities, small size, low price, etc. In this paper, with (Pb 0.96 La 0.04 )(Zr 0.9 Ti 0.1 ) 0.99 O 3 (PLZT4/90/10) as a representative, the effect of silver oxide doping on the dielectric properties of ceramics was investigated. PLZT4/90/10 ceramics prepared by the solid phase method was doped with 0 wt%, 0.1 wt%, 0.5 wt%, 1.0 wt% and 1.5 wt% of Ag 2 O, and the effect of the addition of Ag 2 O was analyzed on dielectric , energy storage and conductive properties. Ag + replaces the A-position of Pb 2+ in the lattice, which leads to generate more oxygen vacancy in the lattice. Incorporation of silver oxide improves the releasable energy storage density (W re) and the energy release efficiency (η). When the content of Ag 2 O is 1.0%, the releasable energy density reaches the maximum value of 2.22 J/cm 3 and the energy release efficiency is raised to 78.69%. The releasable energy density and the energy release efficiency are listed at different temperatures for different doping amounts. It can be seen that Ag 2 O doping can also promote the temperature stability of the energy storage density. In addition, the doping of Ag 2 O has a good effect on smoothing the temperature dependence curves of dielectric constant and improving the resistivity of ceramics of PLZT4/90/10 ceramics. As the dielectric constant, energy storage density and other aspects are concerned, Ag 2 O doping has a beneficial effect on the performance of capacitor applications for PLZT4/90/10 ceramics.
研究领域:
材料科学
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物理学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 20
·7272-7280
·
IF 0
Shuaishuai Ma,Jinjuan Xue,Yuming Zhou,Zewu Zhang
ZnO/Ag2O heterostructures were successfully synthesized via a simple one-step photochemical route. The samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and energy dispersive X-ray spectroscopy (EDS). Photocatalytic activity toward degradation of a methylene blue (MB) aqueous solution under ultraviolet (UV) and visible light was investigated. The results showed that the as-prepared ZnO/Ag2O heterostructures significantly enhanced the UV and visible photocatalytic activity compared with pure ZnO and Ag2O. In particular, the rates of degradation using the as-prepared ZnO/Ag2O heterostructures were 27.4 and 15.6 times faster than that using bare ZnO nanoparticles under UV and visible light irradiation, respectively. Furthermore, the as-prepared ZnO/Ag2O heterostructures could be easily recycled in UV and visible photocatalytic applications due to the low concentration of surface defects. Moreover, the ZnO/Ag2O heterostructures could also degrade MB dye with high efficiency in various water types such as Changjiang river water, tap water, and deionized water, which will greatly promote their application in the area of environmental remediation.
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DOI
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yingjie Gao,Qi Zhao,Yunhe Li,Yuanqing Li,Jianfeng Gou,Xiuwen Cheng
Advanced Oxidation Processes (AOPs) play a critical role in the elimination of antibiotics, in which it is essential to explore an environmentally friendly, cheap and effective catalyst. In this study, Ag 2 O-g/eggshell catalyst had been synthesized in a simple strategy, combining with peroxymonosulfate (PMS) to simultaneous remove sulfamethoxazole (SMX). Then, physicochemical properties of catalyst were investigated by series of techniques. Results indicated the Ag species was featured with a spherical-like structure and homogeneously distributed on the surface of eggshell. In addition, Ag 2 O-Ag/eggshell exhibited high degradation efficiency of SMX by activation of PMS (94.6%) under the optimized conditions of 0.1 g•L −1 Ag 2 O-Ag/eggshell, 0.16 mM PMS, 10 mg•L −1 SMX and initial pH 6.42. Moreover, several parameters such as the dosage of catalyst, PMS and the effect of pH, co-existing anions, humic acid (HA) and water matrices on SMX degradation were systematically studied. Besides, scavenging experiments were conducted to distinguish the active radicals. Furthermore, to improve the reusability of powder Ag 2 O-Ag/eggshell, corresponding Microporous Filter Membrane had been synthesized. Subsequently, possible reaction mechanism was proposed. Consequently, these results revealed that the waste eggshell was considered as a promising supporting material for the metal catalyst for the catalytic degradation of antibiotics in water.
研究领域:
环境科学
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催化化学
·
药学
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DOI
高影响因子
Materials Today Communications
·
2021
·
IF 3.383
Yun Mou,Yang Peng,Jiaxin Liu,Qing Wang,Zhenyu Lei,Fengshun Wu,Mingxiang Chen
To solve the high cost and high sintering temperature of Ag nanoparticle inks and the poor storage stability of Ag precursor inks, an inexpensive and self-reducing Ag 2 O ink was designed for fabricating highly flexible printed conductors at low sintering temperature. The printed Ag 2 O inks can be in-situ reduced to Ag particles and form the conductive network, and the electrical properties and flexibility of the sintered Ag tracks were systematically investigated. Consequently, the printed Ag tracks sintered at 160 °C exhibit the low electrical resistivity of 1.38 × 10 −4 Ω cm, and the relative resistances (R/R o ) of Ag tracks are less than 1.3 and 1.7 after 1000 times of the bending and twisting tests, respectively. These results demonstrate that the inexpensive Ag 2 O ink provides an attractive prospect for low temperature fabricating high-quality flexible printed conductors.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Wenhao Zhang,Rui Li,Mingfang Zhu,Wen Zhou,Mushen Lai,Huanru Liang,Rongkun Zhu,Hongqing Ye
The Ag 2 O @ MWCNTs nanocomposites material was prepared via simple, one-step situ precipitation method using conventional reagent. The obtained Ag 2 O @ MWCNTs was structurally characterized by scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR) and ultraviolet and visible spectrophotometry (UV–Vis). The functional GCE with Ag 2 O @ MWCNTs exhibits good electrochemical performances with a pair of quasi-reversible redox peak. While sulfamethoxazole (SMX) can interact with Ag(I) to form Ag-SMX complex, which makes the concentrations of silver ion involved in the redox reaction decreased, thus reducing the redox peak of Ag 2 O @ MWCNTs composites. The decreased oxidation peak current is found to be linear with the SMX concentrations from 0.02–100 nM and the detection limit was 4.06×10 -12 M (S/N=3) by using DPV method. Furthermore, the proposed method demonstrated excellent selectivity, repeatability and reproducibility, and can be successfully applied for the SMX analysis in human serum.
研究领域:
分析化学
·
环境科学
·
医学检测
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DOI
高影响因子
危险品化学品经营许可证（带存储）