JOURNAL OF SOLID STATE CHEMISTRY
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2011
·Vol. 184
·期 8
·2190-2195
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IF 2.261
Shibin Sun,Xueting Chang,Lihua Dong,Yidong Zhang,Zhenjiang Li,Yanyan Qiu
A novel gas-sensing material and photocatalyst was successfully obtained by decorating Ag/AgCl nanoparticles on the W 18 O 49 nanorods through a clean photochemical route. The as-prepared samples were characterized using combined techniques of X-ray diffractometry, electron microscopy , energy dispersive X-ray spectrometry , and X-ray photoelectron spectroscopy. Gas-sensing measurements indicate that the Ag/AgCl/W 18 O 49 NRs sensors exhibit superior reducing gas-sensing properties to those of bare W 18 O 49 NRs, and they are highly selective and sensitive to NH 3 , acetone, and H 2 S with short response and recovery times. The Ag/AgCl/W 18 O 49 NRs photocatlysts also possess higher photocatalytic performance than bare W 18 O 49 NRs for degradation of methyl orange under simulated sunlight irradiation. Possible mechanisms concerning the enhancement of gas-sensing and photocatalytic activities of the Ag/AgCl/W 18 O 49 NRs composite were proposed.
研究领域:
材料科学
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纳米技术
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气体传感器
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光催化
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环境化学
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Catalysts
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2025
·Vol. 15
·期 7
·638
·
IF 4
Elmuez Dawi,Mohsen Padervand
Ag/AgCl-decorated layered lanthanum oxide (La2O3) and niobium pentoxide (Nb2O5) plasmonic photocatalysts are fabricated through an ionic liquid-mediated co-precipitation method. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), powder X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), diffuse reflectance spectroscopy (DRS), and photoluminescence (PL) techniques were used to illustrate the physicochemical properties of the materials. The photoactivity was evaluated for the degradation of Acid Blue 92 (AB92) azo dye, a typical organic contaminant from the textile industry, and U251 cancer cell inactivation. According to the results, Nb2O5–Ag/AgCl was able to remove >99% of AB92 solution in 35 min with the rate constant of 0.12 min−1, 2.4 times higher than that of La2O3–Ag/AgCl. A pH of 3 and a catalyst dosage of 0.02 g were determined as the optimized factors to reach the highest degradation efficiency under solar energy at noon, which was opted to have the highest sunlight intensity over the reactor. Also, 0.02 mg/mL of Nb2O5–Ag/AgCl was determined to be of great potential to reduce cancer cell viability by more than 50%, revealed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and mitochondrial membrane potential (MMP) examinations. The mechanism of degradation was also discussed, considering the key role of Ag0nanoparticles in inducing a plasmonic effect and improving the charge separation. This work provides helpful insights to opt for an efficient rare metal oxide with good biocompatibility as support for the plasmonic photocatalysts with the goal of environmental purification under sunlight.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Jialin Chen,Yonghong Lu,Lanjun Liu,Haibo Xu
Maintenance-free, cost-effective, and long-lasting potentiometric sensors are highly anticipated for marine detection. Solid-state silver/silver chloride (Ag/AgCl) is considered the most suitable non-polarizable electrode for that purpose. However, the conventional fabrication of thin-film or porous Ag/AgCl electrodes has limitations in the case of simultaneous cost-effectiveness and stability endurance. In the present study, the multi-walled carbon nanotube (MCNT)/Ag/AgCl composite electrode with a 70 mg/cm 2 Ag load was prepared, having nanoporous MCNT/Ag conductive skeleton, and a three-dimensionally spreading Ag/AgCl thin layer. The prepared MCNT/Ag/AgCl composite electrode showed an excellent electrode performance, including low resistance, high exchange current density , and stable potential with long-term stability and low cost. The process kinetics and self-repairing mechanism between Ag and AgCl with the help of MCNT were elucidated. The usage of MCNT/Ag/AgCl composite electrode as a solid-state reference electrode and ocean electric field sensor was successfully evaluated, which provides a promising marine potentiometric sensor application for this nanoporous metal composite electrode via a novel preparation method.
研究领域:
电化学
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海洋传感器
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材料科学
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纳米复合材料
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环境监测
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Dashi Lei,Juanqin Xue,Xiangyu Peng,Shuhao Li,Qiang Bi,Changbin Tang,Liang Zhang,Jing Zhang
Inorganic arsenic threatens human health due to its high mobility and toxicity. In this work, rapid and effective treatment of As(III) wastewater was achieved by Z-Scheme photocatalyst (ZnFe 2 O 4 /Ag/AgCl). By means of peroxymonosulfate (PMS) activation, 50 mg/L As(III) was completely removed within 20 min under light irradiation. During photocatalytic system, free radicals ( SO 4 − , OH, O 2 − ) and non-radicals ( 1 O 2 ) were responsible for As(III) removal. The fast PMS activation was attributed to the loop conversion of Fe(III)/Fe(II) and Ag 0 /Ag + . Besides, density functional theory (DFT) calculations exhibited that Fe atoms were active sites for As(III) adsorption and Ag nanoparticles were spots for PMS activation. Specially, the dual active sites on photocatalyst could effectively minimize the distance between oxidizing product with arsenite molecular and thus facilitate As(III) fast oxidation.
研究领域:
环境科学
·
材料科学
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JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Gongduan Fan,Rongsheng Ning,Zhongsen Yan,Jing Luo,Banghao Du,Jiajun Zhan,Lingshan Liu,Jin Zhang
Antibiotic contamination is increasing scrutinized recently. In this work, the Ag−AgCl/WO 3 /g-C 3 N 4 (AWC) nanocomposites were successfully synthesized using a two-step process involving electrostatic self-assembly and in-situ deposition for trimethoprim (TMP) degradation. The as-prepared photocatalysts were investigated and characterized by XRD, FTIR, XPS, TGA, SEM, TEM , UV–vis, PL and EIS. The experimental results indicated that 99.9% of TMP (4 mg/L) was degraded within 60 min when the concentration of AWC was 0.5 g/L. Reactive species scavenging experiments and electron spin resonance (ESR) experiments illustrated that superoxide radical (•O 2 − ) and photogenerated holes (h + ) were the main active species. The functional theory calculation and identification of intermediates via HPLC-MS revealed the possible degradation pathways of TMP. A double photoelectron-transfer mechanism in AWC photocatalyst was proposed. Five cycling photocatalytic tests and reactions under different solution matrix effects further supported that the AWC was a promising photocatalyst for the removal of TMP from the aquatic environment.
研究领域:
环境科学
·
材料科学
·
生物学
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PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Jianxin Liu,Rui Li,Yingyuan Hu,Tan Li,Zehui Jia,Yunfang Wang,Yawen Wang,Xiaochao Zhang,Caimei Fan
An Ag@AgCl/Ag nanofilm/ZIF-8 composite photocatalyst was successfully constructed for the first time by loading Ag@AgCl and Ag nanofilm on the surface of ZIF-8 simultaneously via a simple deposition-photoreduction method. The formed Ag nanofilm was harnessed as a mediator to transfer photo-induced electrons from the plasmonic Ag@AgCl nanostructure to ZIF-8 for enhancing the photocatalytic reaction rate with visible light. The photocatalytic activity was evaluated by photocatalytic degradation of methylene blue (MB) under visible light irradiation. The first-order kinetic constant of MB degradation over Ag@AgCl/Ag nanofilm/ZIF-8 (14.762 h −1 ) was nearly 2 times of Ag@AgCl/ZIF-8 (7.932 h −1 ). The electrochemical impedance spectra, photoelectric conversion spectra and ESR DMPO-O 2 − species spectra revealed that AFZ had a lower resistance, higher photocurrent density and more generation of superoxide radical than those of AZ, meaning that the extended interface between Ag nanofilm and ZIF-8 could promote the quick electrons transfer and electron-hole pairs separation. This work provides a new type electrons transfer mediator in fabrication of efficient plasmonic photocatalysts.
研究领域:
材料科学
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环境科学
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高影响因子
LANGMUIR
·
2023
·
IF 3.9
Haoran Li,Daqing Chen,Wen Zhou,Donghao Cheng,Danhua Ge,Xiaojun Chen
Monitoring l-cysteine (l-Cys) is of importance for human health and food safety. Herein, we designed a novel strategy for bimetallic Au and Ag/AgCl anchoring on Ni-doped ZIF-67 to form core–shell nanocubes (Ni-ZIF-67/AuAg/AgCl) using the galvanic replacement processes. The unique properties of ZIF-67 nanocubes were conducive to generating strong synergistic catalytic effects with Au and Ag/AgCl, particularly when Ni-ZIF-67/AuAg/AgCl composites were employed as oxidase mimics for catalyzing the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB). The Ni-ZIF-67/AuAg/AgCl composites displayed strong affinity toward TMB, displaying a lower Michaelis constant Km value of 0.25 mM and a higher maximum initial rate Vmax of 9 × 10–8 M s–1. By virtue of the nanozyme, the colorimetric sensor was constructed for l-Cys detection with a relatively low detection limit of 0.051 μM. The superior catalytic performance of the as-prepared Ni-ZIF-67/AuAg/AgCl composites can be ascribed to the core–shell structure, large specific surface area, and strong synergistic catalytic effects, which are beneficial for exposing more active sites and enhancing the conductivity to further boost their catalytic activity.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Nanke Ma,Yuwei Chen,Liya Wang,Ping Tan,Nayu Chen,Yuan Jin,Jian Song,Guangli Li
Conductive hydrogels have garnered significant attention for flexible electronics, yet simultaneously achieving optimal mechanical robustness and electrical performance under harsh conditions remains challenging. Herein, an ion/electron dual-mode conductive Ag/AgCl@Agar/P(AM- co -HEAA) hydrogel was developed for wearable motion detection and electrophysiological signal monitoring. The hydrogel exhibited outstanding mechanical properties, including excellent stretchability (2207 %), high tensile stress (0.32 MPa), and remarkable toughness (3.90 MJ/m 3 ). As a strain sensor, it displayed high sensitivity (GF of 4.17 within 1100–1400 % strain), stable and reproducible resistance signal output across both micro-strains (0.01–0.1 %) and macro-strains (200–1400 %), and excellent working durability and reliability (200 cycles at 200 % strain). Notably, it also demonstrated reliable sensing performance even at −20 °C due to the ion/electron hybrid conductive mechanism. These unique properties enabled the hydrogel successfully applied in real-time human motion detection and human-machine interaction. Moreover, the hydrogel semi-dry electrodes displayed low potential drift (4.64 μV/min) and electrode-scalp impedance (13.2 ± 1.6 kΩ at 10 Hz). Significantly, the hydrogel electrodes achieve clinical-grade ECG and EEG signal acquisition, comparable to commercial wet electrodes. These superior properties, combined with facile fabrication, make this multifunctional hydrogel a promising candidate for next-generation wearable devices in motion monitoring and human–machine interactions.
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PubMed
高影响因子
Polymers
·
2023
·Vol. 15
·期 13
·2796
·
IF 5
Tao Ming,Tingting Lan,Mingxing Yu,Hong Wang,Juan Deng,Deling Kong,Shuang Yang,Zhongyang Shen
Continuous in vivo monitoring (CIVM) of pH value is essential for personalized medicine, as many diseases are closely related to acid–base imbalances. However, conventional pH meters are limited in their ability to perform CIVM due to excessive blood consumption, large device volume, frequent calibration, and inadequate real-time monitoring. There is thus an urgent need for a portable method for CIVM of pH value. To address this need, we propose a minimally invasive, continuous monitoring solution in the form of an implantable pH microneedle sensor (MNS) in this study. The MNS is based on the integration of an acupuncture needle (AN) and a Ag/AgCl reference electrode. We fabricate the sensor by electrochemically depositing platinum black and gold nanoparticles onto the AN and further modifying it with polyaniline to increase its sensitivity to hydrogen ions. The pH value is obtained by calculating the open circuit voltage between the modified AN and the reference electrode. The resulting MNS demonstrates excellent selectivity and a high nernstian response to pH (−57.4 mV per pH) over a broad range (pH = 4.0 to pH = 9.0). Both in vitro and in vivo experiments have verified the performance of the sensor, showcasing its potential for biomedical research and clinical practice. The MNS provides an alternative to conventional pH meters, offering a less invasive and more convenient way to perform CIVM of pH value. Moreover, this electrochemical implantable sensor based on AN and silver wires provides a simple and sensitive method for continuous in vivo detection of other biomarkers.Keywords:polyaniline;electrochemical sensor;nanocomposites;continuous in vivo monitoring;pH value
研究领域:
生物医学工程
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分析化学
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纳米技术
·
电化学
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jing Sun,Yalei Mei,Weiliang Bai,Li Han,Yuqiang Li,Yuzhong Gao,Ming-Fei Lang,Hongsheng Xue
Flexible sheet reference electrodes play a crucial role in both flexible electrochemical biosensors and electrophysiological monitoring. Enhancing electrode stability and extending continuous operational lifespan are key issues in the research of flexible sheet reference electrodes. In this study, a novel flexible Ag/AgCl sheet reference electrode was fabricated by semi-embedding nano-silver dendrites within a polydimethylsiloxane (PDMS) matrix. The flexible Dendritic Ag/AgCl quasi-reference electrodes showed comparable stability of open circuit potential to commercial glass reference electrodes, with a single continuous stable operation time exceeding 12 h and sustained stable operation for at least 30 days when operated continuously for 1 h per day. Additionally, the shelf life was significantly extended to at least 1 year. An in-depth exploration of its mechanism reveals that the embedding strategy plays a crucial role. It strengthens the tight connections between silver dendrites, forming a robust and stable conductive network that ensures rapid and stable charge transfer. Furthermore, the strong adhesion between silver dendrites and PDMS greatly enhances its mechanical durability. This electrode exhibits high practical value in electrophysiological monitoring such as electroencephalogram and electrocardiogram, as well as in flexible sensor applications for H 2 O 2 sensing in pleural effusions, opening new pathways for advancements in flexible wearable devices and biomedical sensor technologies.
研究领域:
生物医学工程
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材料科学
·
传感器技术
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2026
·
IF 3.2
Yuye Li,Tianao Liu,Tingting Du,Congzhi Hu,Youyong Pang,Yongping Liu,Botian Liu,Ling Li,Huidan Lu,Bin Huang
Dyes and antibiotics possess high stability and are resistant to microbial degradation, leading to their persistence in the natural environment. Photocatalysis is an effective and green degradation method. In this work, a novel Ag/AgCl/NH 2 -MIL-53(Fe) (AAF) heterojunction photocatalyst was prepared using a solvothermal method, precipitation method, and photochemical reduction method, which effectively promotes the separation of photogenerated charge carriers. The study shows that the composite consisting of 95 wt% Ag/AgCl/NH 2 -MIL-53(Fe) (AAF-95) can photocatalytically degrade 99.4% of RhB within 15 min and 82.4% of TC within 12 min, achieving higher photocatalytic degradation activity than the individual materials. The main active species involved in the degradation are h + and •O 2 - . Based on Mott-Schottky tests, radical trapping experiments, and UV-vis DRS, a possible photocatalytic degradation mechanism and the advantages are proposed: AAF-95 broadens the light absorption range, and the NH 2 -MIL-53(Fe) increases the specific surface area, thereby enhancing the catalytic reaction activity. The coupling between the heterojunction and the SPR effect promotes the separation of photogenerated charge carriers and lowers the catalytic reaction barrier. These are the reasons for the enhanced photocatalytic degradation capability of the composite.
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Nano Today
·
2024
·
IF 13.2
Peipei Li,Jing Kang,Xiaojie Wu,Duo Wang,Yongjun Li,Nan Liang,Rui Du,Minjie Wang,Alideertu Dong,Yuliang Li
Bacterial keratitis (BK) is one of the most threatening ocular diseases, leading to stromal injury, corneal perforation, or even blindness. Avoiding side effect is necessary for efficient BK treatment. Herein, we develop GDY-Ag@AgCl heterojunction catalysts to achieve BK treatment via mild phototherapy strategy. Mild photothermal therapy (PTT) can greatly enhance the generation of ROS produced by photocatalytic therapy (PCT), which can decrease the dosage of photosensitizer, as well as solve the issue of uncontrolled local overheating and the accumulation of PTT agents, minimizing side effects and avoiding secondary injuries. The results demonstrate that lower dosage of PTT/PCT agents, and milder and controlled thermal effect of GDY-Ag@AgCl exhibits excellent inactivation performance against ampicillin-resistant Escherichia coli and methicillin-resistant Staphylococcus aureus (MRSA). Moreover, this phototherapy strategy not only achieves more effective treatment of BK induced by MRSA with no side effects but also shows a superior ability to alleviate inflammation. This strategy offers a safe and promising theragnostic approach for treating ocular drug-resistant bacterial infections.
研究领域:
眼科学
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光疗
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纳米技术
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传染病
·
耐药性
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高影响因子
危险品化学品经营许可证（带存储）