CATALYSIS LETTERS
·
2025
·Vol. 155
·期 3
·1-11
·
IF 2.4
Wang Xiuqing,Yan Ruiyao,Fu Jianyu,He Yan,Zheng Jiahuan,Liu Liu,Zhou Na
The practical application of Cu 2 O in the field of photoelectrocatalytic (PEC) hydrogen production has been limited by its relatively low photoconversion efficiency and electron mobility. Plasmonic metal nanoparticles have been utilized to enhance the charge separation of semiconductors through resonance energy transfer from metal nanoparticles to semiconductors. In this study, Ag nanosphere (Ag NS)@SiO 2 were combined with Cu 2 O to form triple core–shell nanocomposites, aiming to enhance the photoelectrochemical activity of Cu 2 O under visible-light irradiation. The microstructures of the Ag@SiO 2 @Cu 2 O nanocomposites were regulated by controlling the thickness of SiO 2 interlay and Cu 2 O shell in order to optimize the PEC efficiency. It was found that Ag NS@SiO 2 (5 nm)@Cu 2 O (29 nm) NCs exhibited the highest photocurrent intensity, showing 3.3 times, 11.9 times, and 17.8 times higher values than pure Cu 2 O, pure Ag NS, and AgNS@SiO 2 NPs respectively. Furthermore, the photoelectrocatalytic hydrogen production velocity of Ag NS@SiO 2 (5 nm)@Cu 2 O (29 nm) NCs was around 25 mmol·g −1 ·h −1 , which has been improved around 4.2 times compared to pure Cu 2 O. This enhanced performance is attributed to plasmon-induced resonance energy transfer from Ag metal nanoparticles to Cu 2 O semiconductor, which may improve the separation efficiency of electron–hole pairs and lead higher photoelectrocatalytic efficiency. Graphic The Ag NS@SiO 2 was integrated with Cu 2 O to form triple core–shell nanocomposites, aiming to enhance the photoelectrochemical activity of Cu 2 O under visible-light irradiation through plasmon-induced resonance energy transfer from Ag to Cu 2 O. And their photoelectrocatalytic performances were optimized by controlling the thickness of SiO 2 interlay and Cu 2 O shell. Ag NS@SiO 2 (5 nm)@Cu 2 O (29 nm) NCs exhibited superior photocurrent intensity and enhanced photoelectrocatalytic hydrogen production rate compared to pure Cu 2 O.
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Arabian Journal of Chemistry
·
2024
·
IF 5.3
Wen Liu,Baizhi Su,Hua Song,Xueyun Zhang,Guodong Ren,Xuewei Wang,Lili Yan,Sufang Ma,Lihong Li,Lixia Guo,Shuming Xu,Boye Zhang,Haipeng Diao,Zhifang Wu,Sijin Li,Chengwu Zhang
Staphylococcus aureus has become one of the most common pathogens in clinical tissue infection, and it is easy to form biofilm. Incomplete removal of biofilms often leads to recurrent infections, and more serious is the possibility of bacteria developing drug resistance. Therefore, the effective eradication of refractory biofilms is essential. Herein, a temperature-sensitive hydrogel was prepared by doping the photothermal carbon dots (PTCDs) chelated by Ag + , and the AIPH which could produce alkyl radicals in response to heat into the thermodissolved gelatin. Under the irradiation of 660 nm laser, the PTCDs generated heat to dissolve the hydrogel, and promoted chelation of silver ions in PTCDs for chemical sterilization. Meanwhile, the heat generated by the PTCDs induced the 2,2′-azobis[2-(2-imidazolin-2-yl) propane] dihydrochloride (AIPH) to produce alkyl free radical sterilization, achieving the purpose of photothermal/thermodynamic/chemical synergistic to kill Staphylococci aureus and destroy its biofilm. Therefore, the biocompatible PTCDs@Ag-AIPH hydrogel proposed in this study was a promising composite that could eliminate biofilms and promoted wound healing, showing good potential in future biomedical applications.
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ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Xi-Qian Sun,Yun-Feng Li,Li Chen,Hong-Bao Li,Ren-Hui Gao,Jie Liu,Tian-Yu Yang,Zheng Guo
Lithium-ion batteries (LIBs) provide many benefits, but trace electrolyte leakage can cause serious safety risks such as thermal runaway. Although gas sensors offer a potential solution, the complexity of electrolyte solvents in LIBs makes it challenging to develop sensing materials capable of universally detecting multiple solvent molecules. Here, Ag@Ag2O-functionalized SnO2 nanoflowers were synthesized using a self-template pyrolysis strategy for the sensitive detection of both common solvent molecules and widely used electrolytes. These sensors, enhanced by abundant oxygen vacancies introduced by Ag@Ag2O functionalization, exhibit excellent sensitivity, particularly to dimethyl carbonate, with a response of 106–100 ppm, a low detection limit of 11.76 ppb, and rapid response/recovery times (28/55 s) at an operating temperature of 200 °C. The sensor performance was validated by density functional theory calculations, which corroborated the effectiveness of the sensing material. In simulated LIB leakage scenarios, such as puncture and electrolyte injection, the sensors demonstrated quick responses to various common electrolyte compositions, indicating their potential for practical applications. This study highlights an effective method for fabricating composite sensing materials and emphasizes the practical significance of our universal detection approach for practical monitoring of electrolyte leakage in energy storage devices.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Jun-Qi Song,Qiu-Yi Peng,Mei-Ling Lu,Shu-Zhen Gao,Wen-Bin Liang,Shaoguang Sun,Ruo Yuan,Dong-Rong Xiao
Developing new high-performance electrochemiluminescence (ECL) emitters is a continuous hotspot. Herein, a novel AgNP-decorated porous organic polymer (AgNPs@ETTBC-BPyDAN-POP, BPyDAN = 2,2′-([2,2′-bipyridine]-5,5′-diyl)diacetonitrile) nanocomposite with coreaction accelerator amplification and covalent rigidification-enhanced ECL was prepared. AgNPs@ETTBC-BPyDAN-POP nanocomposite exhibited excellent ECL performance, not only because abundant AIE-active 4′,4″′,4″″′,4″″″′-(ethene-1,1,2,2-tetrayl)tetrakis(([1,1′-biphenyl]-4-carbaldehyde)) (ETTBC) luminogens were covalently assembled and rigidified into ETTBC-BPyDAN-POP network, which diminished radiationless transition, but also because AgNPs functioned as coreaction accelerators that expedited the generation of coreactant radicals, which in-situ react with adjacent ETTBC + intermediates, thereby producing more ETTBC ⁎ excited states for significantly enhancing the ECL emission. Considering the eminent ECL performance, AgNPs@ETTBC-BPyDAN-POP was employed as an ECL indicator to fabricate a supersensitive biosensor for detecting aflatoxin M1, showing a wide response range (5 fg/mL − 500 ng/mL) with a detection limit of 0.57 fg/mL. Overall, this study offered a promising dual-enhancement strategy to boost AIEgens' ECL emission, thereby providing significant inspiration to develop high-efficiency AIEgen-based ECL materials for fabricating hypersensitive ECL biosensors.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Lei Wu,Kun Zhang,Qiuyan Ye,Yingjie Lv,Jiaqiao Li,Xiaoyan Guo,Yongnan Chen,Yiming Chen
Titanium alloys exhibit excellent mechanical properties, good corrosion resistance and biocompatibility, making they widely used in medical field. Nevertheless, their practical application is frequently constrained by bacterial infection and corrosion issues in physiological environments. To overcome these challenges, this study proposes a novel multifunctional strategy involving the incorporation of Ag + -loaded ZSM-5 zeolites into a micro-arc oxidated (MAO) coating on the surface of titanium alloy to fabricate Ag/ZSM-5@MAO-Ti composite coating. The microstructure, mechanical properties, and functional characteristics of the coating were systematically characterized. Analysis confirmed that Ag/ZSM-5 were evenly dispersed within the MAO coating while preserving the crystal structure intact. By leveraging the mechanical interlocking effect, the particles were securely retained within the micropores of the MAO layer after in-situ hydrothermal secondary growth. The composite coating exhibited exceptional adhesion to the titanium alloy substrate, with an average bond strength of 64 N. Owing to the inherent hydrophilicity of zeolites, the composite coating demonstrated significantly enhanced hydrophilicity with a contact angle of 12.9±0.7°. Antimicrobial tests results revealed that the coating achieved an inhibition rate of more than 99.99% against Escherichia coli (E. coli), and the sustained release of Ag⁺ ensures long-term antimicrobial efficacy. Furthermore, the composite coating displayed superior corrosion resistance in phosphate buffer solution (PBS). In summary, the Ag/ZSM-5 modified MAO coating substantially enhances the antimicrobial properties and corrosion resistance of titanium alloy, offering a promising strategy for the development of advanced medical devices.
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Journal of Materials Chemistry A
·
2024
·
IF 10.7
Zhengjie Su,Xinru Wu,Dong-Hau Kuo,Baoqian Yang,Binghong Wu,Longyan Chen,Pengkun Zhang,Jinguo Lin,Dongfang Lu,Xiaoyun Chen
Herein, an Ag/S co-doped Bi2O3-based sulfur oxide catalyst was prepared via a facile green method. The Ag/S–Bi2O3 catalyst with suitable Ag/S doping demonstrated super visible light photocatalytic hydrogen evolution (PHE) at 7.52 mmol g−1 h−1, with an apparent quantum efficiency (AQE) of 8.67% at 420 nm. Ag/S co-doping can adjust the energy band structure of an oxidation type Bi2O3 catalyst, converting it into a visible light hydrogen production catalyst suitable for hydrogen production. Sulfur doping adjusts the content of oxygen vacancies to enhance the surface active sites, and the introduction of noble metal silver endows the catalyst with more excellent electrical conductivity and electron trapping ability. Thus, Bi2O3 with Ag/S co-doping produced a suitable energy band structure, enhanced the content of oxygen vacancies and the number of surface active sites, and endowed the catalyst with excellent electrical conductivity and electron trapping ability, significantly producing catalysts with excellent visible light PHE activity. Furthermore, Ag/S–Bi2O3-3 exhibited super visible light PHE activity and excellent stability and persistence and is expected to play a potential role in the field of PHE reactions (PHERs).
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ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
·
2024
·Vol. 31
·期 1
·1-13
·
IF 3
Wu Jinze,Yao Jiale,Zhu Xiping,Zuo Danying,Zhang Hongwei,Jiang Shuai,Li Hongjun
Most hydrogels for dye treatment only have the adsorption ability for anionic or cationic dyes, while a few zwitterionic hydrogels that can adsorb both anionic and cationic dyes need a complicated regeneration process when they are reused. To prepare reusable zwitterionic adsorbent hydrogels, in this paper, a zwitterionic composite hydrogel with Ag@g-C 3 N 4 was prepared, which not only can adsorb both anionic and cationic dyes but also has photocatalytic degradation ability. The scanning electron microscopy images show that the optimum hydrogel has a large number of micro pores for dye adsorption. The adsorption capacity of the hydrogel achieves the highest in mixed dye concentration of 50 mg·L -1 with pH value of 7–9. Benefiting from the synergistic effect of adsorption and photocatalytic degradation, the removal efficiency of methyl orange and methylene blue in mixed dyes was up to 93.86% and 91.80%, respectively. The photocatalytic activity trapping experiments showed that superoxide radicals as well as hydroxyl radicals played a major role in photocatalytic degradation. After 5 consecutive photocatalytic degradations, the removal ratio of the hydrogel for dyes was still above 80%, indicating good photocatalytic degradation and reusability properties. This research suggested the zwitterionic composite hydrogel has a promising prospect in removing dyes from wastewater treatment.
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Nano Today
·
2024
·
IF 13.2
Yujiao Xie,Chao Chen,Chenguang Zhang,Lei Xu,Zihou Li,Wenzhi Ren,Xiawei Xu,Yong Ren,Jie Lin,Aiguo Wu
Conventional methodology for accurate identification of breast tumor subtypes is complex and time-consuming. Label-free SERS (surface-enhanced Raman scattering) enables rapid detection of biomolecules and provides intrinsic fingerprint information of analytes. Exploring reliable SERS bioprobes with high sensitivity and repeatability is essential for efficient typing of cancer cells. In this study, a novel core-shell noble metal-semiconductor Cu 2 O@Ag heterostructure with uniform morphology and outstanding SERS activity for label-free detection has been proposed. The Cu 2 O@Ag SERS substrates exhibit exceptional sensitivity to detect 4 nitrophenthiol (4NTP) at extreme low concentration (10 −15 M), and the SERS spectra demonstrate excellent selectivity and repeatability (RSD ≈ 8.84%). The enhancement mechanism is attributed to the synergistic enhancement of photoinduced charge transfer and boosted surface plasmon resonance effect, confirmed by reduced fluorescence lifetime of methylene blue on SERS substrates and enhanced electromagnetic field intensity via finite-difference time-domain computational simulation. The ultrahigh sensitivity and good signal stability endow Cu 2 O@Ag SERS bioprobe potential for accurate detection of four breast cancer cells subtypes. The rich fingerprint information from SERS spectra is processed using linear differentiation analysis, revealing a high accuracy of 93.3% for subtypes classification. These results demonstrate an excellent SERS bioprobe with high sensitivity and repeatability for precision diagnosis has been developed.
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MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Jie Shi,Xiaoqing Huang,Jiangtao Xu
Island-shaped Ag nanoparticles are prepared under the support platform of quartz fabric by a simple chemical deposition method. The prepared flexible SERS substrate in this study demonstrates highly sensitive, excellent signal reproducibility and stability. The enhancement ability can be adjusted by varying concentration of Ag + during synthesizing process, which would lead to the variation of size and gaps of Ag nanoparticles , thus affecting the LSPR effect. Moreover, the prepared SERS substrate shows great practical potential in rapid detection of contaminated fruit with different sampling method.
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RSC Advances
·
2025
·Vol. 15
·期 38
·31508-31521
·
IF 4.6
Donghai Li,Yunrui Xu,Shilin Zhang,Linping Wang
To improve the utilization of solar energy and the efficiency of photocatalytic organic pollutant degradation, novel Z-scheme heterojunctions with high visible light catalytic performances have been widely developed. Herein, a novel Z-scheme BiFeO3/Ag/g-C3N4 heterojunction with a hierarchical 1D/0D/2D structure and visible light absorption was constructed by matching the suitable band structure between 1D BiFeO3 and 2D g-C3N4 and employing the localized surface plasmon resonance (LSPR) effect of 0D Ag nanoparticles. BiFeO3 nanofibers were synthesized via the electrospinning technique, providing short electron transport paths and visible light absorption range for g-C3N4. Plasmonic Ag nanoparticles were photodeposited on the surface of BiFeO3 to enhance the separation efficiency of the photogenerated electron–hole pairs between the bulk interfaces. UV-vis DRS, PL, photocurrent and EIS spectra confirmed the important roles of Ag and BiFeO3 in improving the photocatalytic activity of the Z-scheme heterojunction. The working principle of the BiFeO3/Ag/g-C3N4 Z-scheme heterojunction was proposed, indicating that ˙O2− and ˙OH are the main active species for the photocatalytic degradation of methylene blue (MB). The prepared BiFeO3/Ag/g-C3N4 heterojunction exhibited the highest photocatalytic activity, where its rate constant was 5.84 times higher than that of the pristine BiFeO3 and 3.26 times higher than that of the pristine g-C3N4. This study offers a new means for the design of novel high-performance photocatalysts, which can be a promising candidate in industrial applications.
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ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 24
·2101927
·
IF 18.808
Yuancai Gong,Ruichan Qiu,Chuanyou Niu,Junjie Fu,Erin Jedlicka,Rajiv Giridharagopal,Qiang Zhu,Yage Zhou,Weibo Yan,Shaotang Yu,Jingjing Jiang,Sixin Wu,David S. Ginger,Wei Huang,Hao Xin
The large open-circuit voltage deficit ( V oc,def ) is the key issue that limits kesterite (Cu 2 ZnSn(S,Se) 4 , [CZTSSe]) solar cell performance. Substitution of Cu + by larger ionic Ag + ((Ag,Cu) 2 ZnSn(S,Se) 4 , [ACZTSSe]) is one strategy to reduce Cu–Zn disorder and improve kesterite V oc . However, the so far reported ACZTSSe solar cell has not demonstrated lower V oc,def than the world record device, indicating that some intrinsic defect properties cannot be mitigated using current approaches. Here, incorporation of Ag into kesterite through a dimethyl sulfoxide (DMSO) solution that can facilitate direct phase transformation grain growth and produce a uniform and less defective kesterite absorber is reported. The same coordination chemistry of Ag + and Cu + in the DMSO solution results in the same reaction path of ACZTSSe to CZTSSe, resulting in significant suppression of Cu Zn defects, its defect cluster [2Cu Zn + Sn Zn ], and deep level defect Cu Sn . A champion device with an efficiency of 12.5% (active area efficiency 13.5% without antireflection coating) and a record low V oc,def (64.2% Shockley–Queisser limit) is achieved from ACZTSSe with 5% Ag content.
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Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 11
·3957-3968
·
IF 7.393
Qiao Li,Shanyong Chen,Hong Yu,Jinlei Chen,Xingwu Yan,Lu Li,Maowen Xu
Core–shell structure can endow silver nanowire (AgNW) with excellent stability. However, its application is greatly hindered by non-industrial preparation process and bad dispersity of the present passivation shell layer. Polymer shell material can solve these problems but no researchers have adopted because apart from removing the polymer, there is no method which can overcome the conductivity limit of the insulating polymer at present. Herein, inspired by the tunnel effect of scanning tunneling microscope, we report a tunneling-current junction welding strategy which can preserve the polymer and overcome its conductivity limit simultaneously: (1) the key point for overcoming the conductivity limit is controlling the polymer thickness to generate tunneling current; (2) because the junction resistance is much higher than the nanowire resistance and Joule heat mainly accumulates on the inside of the junction, fixed-point junction welding can be realized to merely remove polymer on the inside of the junction to fuse AgNWs and the polymer in other places can be preserved. Based on this strategy and a welding law refined by us, silver@polyvinylpyrrolidone core–shell (Ag@PVP) nanowire film is welded and the results demonstrate that this strategy is effective. Ag@PVP film exhibits good stability and high opto-electrical performance, indicating that PVP shell layer greatly improves the stability of AgNW but hardly affects its opto-electrical performance. Finally, an optoelectronic device employing the Ag@PVP film as the electrode is fabricated and shows efficiencies comparable to those of an optoelectronic device on indium tin oxide.
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