APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yueyun Huang,Jiahua You,Yingru Ding,Haijuan Mei,Ke Li,Hongping Liang,Guoqiang Yang,Weiping Gong,Zhenting Zhao
Monitoring the glucose concentration in blood makes a great difference on diabetes diagnosis. Herein, we successfully fabricated a kind of 3D hierarchical structure which is NiCo-LDH nanoflower interconnected around Ag nanowires (NiCo-LDH@Ag NWs). The hierarchical core–shell structure offers a large specific surface area and exposing more catalytic sites for electrocatalysis which is benefit for glucose sensing The NiCo-LDH@Ag NWs was dispersed in nafion and modified on screen printing electrode (SPE) to develop portable sensor which marked as NiCo-LDH@Ag NWs/SPE. The as-prepared sensor presents outstanding electrocatalytic ability towards glucose oxidation, including a large detection scale range from 5 μM to 4.5 mM, a sensitivity of 0.52 μA/μM/cm 2 , fast amperometric response/recovery time of 7/7s, good selective, as well as long-time stability. A portable sensing setup, integrating the prepared sensor with a portable potentiostat and smartphone, has been developed. The experimental findings underscore the high performance of the NiCo-LDH@Ag NWs/SPE sensor within this compact detection framework.
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高影响因子
CRYSTAL GROWTH & DESIGN
·
2017
·
IF 4.055
Bo Zhang,Mei-Ling Feng,Jun Li,Qian-Qian Hu,Xing-Hui Qi,Xiao-Ying Huang
By utilizing different small amine molecules as structure-affecting agents (SAAs) and charge-balancing agents (CBAs), four new M–Sn–Q (M = Zn, Ag; Q = S, Se) compounds with the anionic architectures ranging from a one-dimensional (1D) chain to a three-dimensional (3D) network have been solvothermally synthesized. Compound [(Me)2NH2]2ZnSn3Se8 (1) features an anionic (4,4) layer of [ZnSn3Se8]n2n– and represents a rare [ZnSn3Se10] T2 cluster-based two-dimensional Zn–Sn–Se compound directed by organic amine. Compound [NH4]3AgSn3Se8 (2) contains infinite linear anionic chains of [AgSn3Se8]n3n–. Compound [CH3NH3]2[H3O]Ag5Sn4Se12·C2H5OH (3) exhibits a 3D open-framework structure of [Ag5Sn4Se12]n3n– with intersecting 3D channels. Compound [CH3NH3]6Ag12Sn6S21 (4) features a 3D framework structure with 1D channels filled by [CH3NH3]+ cations. The most fascinating structural feature of compound 4 is that a complex 3D [Ag12S17]n22n– anionic network exists based on the combination of three types of basic building blocks of [AgS2] dumbbells, [AgS3] triangles, and [AgS4] tetrahedra. The thermal stabilities, optical properties of the title compounds 1–4, as well as the theoretical band structure and density of states of compound 4 have been studied. Moreover, compound 3 displayed visible-light-driven photocatalytic activity for the degradation of crystal violet.
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高影响因子
Frontiers in Materials
·
2024
·
IF 2.6
Yu Xianglei,Li Wei,Sun Hu,Qian Zhuo,Li Junpeng,Yu Yang,Gan Guoyou
The Te-based glass powder exhibits distinctive characteristics such as a low melting temperature and high chemical stability, rendering it a focal point of research in the realm of glass powder applications for solar cells. In this investigation, a pioneering Ge-containing Te-based lead-free glass powder was synthesized, and the influence of GeO2 content on critical parameters such as glass transition temperature (Tg), high-temperature fluidity, high-temperature wettability, acid and alkali resistance, as well as the network structure of the glass, was systematically explored. At an optimal GeO2 content of 8%, the glass powder displayed the lowest Tg (437°C), accompanied by a subdued crystallization reaction. The high-temperature fluidity and wettability exhibited favorable characteristics, indicating that the inclusion of GeO2 in the glass powder resulted in an enhanced interface contact. Building upon this foundation, techniques to augment the Ag+ content within the glass powder were investigated, along with the interaction between Ag+ and the SiNx anti-reflection layer or silicon on the surface of crystalline silicon solar cells. It was discerned that the Ag+ content in the glass powder significantly influences the deposition of silver microcrystals on the surface of crystalline silicon, thereby impacting the contact resistance of the solar cell. Then influences the series resistance and photoelectric conversion efficiency of the solar cell.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Shuming Yu,Kedi Cai,Hao Zhao,Tan Wang,Tingting Qu,Lan Li,Jianbin Li,Chuangang Yao,Xiaoshi Lang
Potassium-oxygen (K-O 2 ) batteries can offer high energy density and low cost, but suffer from poor cycle life due to low efficiency and slow kinetics. Therefore, the development of efficient catalysts is the key to solve the problems. In this study, an efficient Ag/MnO 1.1 @C composite is designed as a catalytic cathode for K-O 2 batteries via calcining MnAg-MOFs precursors. The porous chain structure of the material facilitates the storage of discharge products and diffusion of oxygen, while the oxygen vacancies enhance the adsorption of O 2 and catalytic activity. Furthermore, the interfacial electron transfer between Ag and MnO 1.1 induces surface charge redistribution, facilitating improved electrochemical reaction kinetics that effectively promote both formation and decomposition of the discharge product. And then, the coupling effect between Ag and MnO further promotes the electron transfer in the K-O 2 battery, which greatly enhances the ORR and OER activities. As a result, the Ag/MnO 1.1 @C composite as an air cathode for K-O 2 batteries show a specific initial discharge capacity of 2328 mAh g −1 (200 mAh g −1 limiting capacity) and 145 stable cycles.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Yanyan Chen,Qiang Wang,Tianyong Zha,Jigang Min,Jingying Gao,Cunhui Zhou,Jingyang Li,Mengdi Zhao,Shenjie Li
High-quality water-soluble Ag-In-S/ZnS core/shell quantum dots have been successfully synthesized via a facile and green method, with mercaptosuccinic acid and sodium citrate as dual ligands in one pot. The fabricated quantum dots exhibit excellent optical characteristics, including photoluminescence quantum yield (PLQY) of up to 50%, and the obvious first excition absorption peak. The emission peak of Ag-In-S/ZnS core/shell quantum dots can be tuned from 507 to 580 nm which covers the most of the visible light . Finally, the as-prepared Ag-In-S core quantum dots can be used directly in ion probe , achieved the direct visual inspection of Pb 2+ .
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Kun Wang,Rong Chen,Xun Zhu,Qiang Liao,Dingding Ye,Gang Chen,Ming Liu
In this study, a simple method for directly synthesizing Ag nanoparticles on the inner wall of a microreactor was proposed to catalytically convert 4-NP to 4-AP. The proposed method employed silver ammonia as the precursor and polydopamine (PDA) to modify the surface of the microreactor. Because PDA contains numerous reducing agents of phenolic hydroxyl groups, the silver ions can be effectively reduced to Ag nanoparticles. Moreover, due to the zwitterionic nature of PDA, the use of silver ammonia as a precursor, which intrinsically has a high pH value, can allow for more silver ions to be adsorbed on the surface than the conventionally used AgNO3 as a precursor. Accordingly, the precursor utilization could be greatly improved, leading to the increase of the catalyst loading and thereby boosting the catalytic conversion and durability. It was also found that an increase in the reduction time required for the catalyst preparation could lead to the increase of the catalyst loading and thereby the catalytic performance but a too long reduction time did not continue to make more contribution. Experimental results demonstrate that the microreactor prepared by this simple method is able to exhibit good catalytic activity and durability, providing a new approach for developing high-performance microreactors.
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高影响因子
Nanoscale
·
2014
·Vol. 6
·期 11
·5762-5769
·
IF 6.739
Lihui Yuwen,Fei Xu,Bing Xue,Zhimin Luo,Qi Zhang,Biqing Bao,Shao Su,Lixing Weng,Wei Huang,Lianhui Wang
A general and facile method for water-dispersed noble metal (Au, Ag, Pd, Pt) nanocrystal modified MoS2 nanosheets (NM–MoS2 NSs) has been developed. By using sodium carboxymethyl cellulose as a stabilizer, well-dispersed NM–MoS2 NSs with homogeneously deposited noble metal nanocrystals (NM NCs) can be synthesized in aqueous solutions. Due to the transition from the semiconducting 2H phase to the metallic 1T phase, the chemically exfoliated MoS2 (ce-MoS2) NSs have improved electrochemical activity. The partially metallic nature of the ce-MoS2 NSs and the catalytic activity of the NM NCs synergistically make NM–MoS2 NSs a potential electrochemical catalyst. For the first time, Pd–MoS2 NSs were used as an electrocatalyst for methanol oxidation in alkaline media. The results showed that Pd–MoS2 NSs have enhanced catalytic activity with 2.8-fold anodic peak current mass density compared to a commercial Pd/C catalyst, suggesting potential for application in direct methanol fuel cells (DMFCs).
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Xin Wang,Xiaodan Zhang,Haiyan Cao,Yuming Huang
N-doped Ti 3 C 2 quantum dots (N-Ti 3 C 2 QDs) as the fluorescent nanoprobe were synthesized through inorganic base (i.e. KOH) stripping and solvothermal approach. The N-Ti 3 C 2 QDs displayed well-monodispersed near-spherical particles with average size of 2.3 nm, exhibited brightly blue emission and good stability, and possessed 14.46% of fluorescent quantum yield. Upon addition of Co 2+ or Ag + ions, the fluorescence (FL) of N-Ti 3 C 2 QDs could be quenched significantly. Mechanism investigation indicated that the inner filter and static extinguishing effects are responsible for the Co 2+ or Ag + ions induced FL quenching of the N-Ti 3 C 2 QDs. Based on above outcomes, we developed a simple N-Ti 3 C 2 QDs based fluorescent assay for the simultaneous determination of Co 2+ and Ag + ions, with a low detection limit of 0.21 and 0.10 μM, respectively. The assay was used to determine the content of Co 2+ and Ag + in real samples. This work will provide another way for the synthesis of fluorescent N-Ti 3 C 2 QDs and exploited their application in simultaneous detection of Co 2+ and Ag + .
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高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Cheng-Kun Wu,Shuai Zou,Chen-Wei Peng,Si-Wei Gu,Meng-Fei Ni,Yu-Lian Zeng,Hua Sun,Xiao-Hong Zhang,Xiao-Dong Su
The ultraviolet (UV) light stability of silicon heterojunction (SHJ) solar cells should be addressed before large-scale production and applications. Introducing downshifting (DS) nanophosphors on top of solar cells that can convert UV light to visible light may reduce UV-induced degradation (UVID) without sacrificing the power conversion efficiency (PCE). Herein, a novel composite DS nanomaterial composed of YVO 4 :Eu 3+ ,Bi 3+ nanoparticles (NPs) and Ag NPs was synthesized and introduced onto the incident light side of industrial SHJ solar cells to achieve UV shielding. The YVO 4 :Eu 3+ ,Bi 3+ NPs and Ag NPs were synthesized via a sol–gel method and a wet chemical reduction method, respectively. Then, a composite structure of the YVO 4 :Eu 3+ ,Bi 3+ NPs decorated with Ag NPs was synthesized by an ultrasonic method. The emission intensities of the YVO 4 :Eu 3+ ,Bi 3+ nanophosphors were significantly enhanced upon decoration with an appropriate amount of ∼20 nm Ag NPs due to the localized surface plasmon resonance (LSPR) effect. Upon the introduction of LSPR-enhanced downshifting, the SHJ solar cells exhibited an ∼0.54% relative decrease in PCE degradation under UV irradiation with a cumulative dose of 45 kW h compared to their counterparts, suggesting excellent potential for application in UV-light stability enhancement of solar cells or modules.
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高影响因子
Inorganic Chemistry Frontiers
·
2018
·Vol. 5
·期 10
·2493-2500
·
IF 5.106
Xiaoling Lin,Mengling Zhang,Mengmeng Zhu,Hui Huang,Chunfeng Shi,Yang Liu,Zhenhui Kang
Epoxides are an extremely important class of chemical intermediates in the chemical industry due to the versatility of epoxides in preparing many fine and specialty chemicals. However, designing more active and selective heterogeneous catalysts in epoxidation is still a priority and a challenge. In this work, we demonstrate the synthesis of two new Ag/polyoxometalate-based coordination polymers (Ag8(mttz)4(H2O)[PWVWVI11O40]·H2O (1) and Ag8(mttz)4(H2O)[PMoVMoVI11O40] (2), mttz = 5-methylthio-2H-tetrazole) that are highly active for the selective oxidation of cis-cyclooctene to epoxycyclooctane under mild conditions (solvent-free, atmospheric pressure, 70 °C with H2O2 as the oxidant under visible light). It is worth noting that compound 1 possesses abundant exposed active edge sites of Ag, resulting in the catalytic performance achieved in the selective oxidation of cis-cyclooctene to epoxycyclooctane being superior to its components (metal, polyoxometalates and ligand) and compound 2 with the conversion/selectivity to epoxycyclooctane of 70.15/99.68%, respectively. The excellent photocatalytic activity of compound 1 should be attributed to the synergy of the components after coordination polymerization and its structure with exposed active edge sites of Ag.
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高影响因子
IEEE Photonics Journal
·
2024
·Vol. 16
·期 4
·1-9
·
IF 2.1
Wenying Zhou,Xue Han,Yanjun Wu,Guochao Shi,Shiqi Xu,Mingli Wang,Wenzhi Yuan,Jiahao Cui,Zelong Li
An effective SERS-based detection method assisted by machine learning algorithm has been developed to intelligently identify the pharmacodynamic substances in traditional Chinese medicine (TCM) which aided in the quality control and identification of TCM. In this work, the ultrasensitive grating-like core-shell Ag@SiO2@Cu@moth wing (Ag@SiO2@Cu@MW) SERS platform was explored which can precisely control the intergap distances by adjusting the thickness of the SiO2 layer. This SERS platform demonstrated reproducibility and reliability, with a low relative standard deviation (RSD) of 7.38% and an enhancement factor (EF) of 2.49 × 107. The optimized Ag30@SiO2(4)@Cu20@MW substrate were then applied in the accurately analyzing pharmacodynamic substances. Specifically, the label-free SERS analysis showed the distinct spectral features for Jujuboside A, Saikosaponin A and Timosaponin A-III. Machine learning algorithms, such as principal component analysis (PCA), decision tree (DT), support vector machine (SVM), k-nearest neighbors (kNN) were employed and further in differentiating with the three pharmacodynamic substances Raman spectrum groups. These results indicate that SERS technology in combination with machine learning algorithms can not only achieve rapid and accurate detection of different types of pharmacodynamic substances, but also promote the modernization and international application of TCM.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Jiaxin Liu,Mingdi Pan,Jiuzeng Jin,Yunshu Lu,Zhongmin Feng,Ting Sun
17β-E2 was the most active sterol estrogen and was widely used in animal husbandry for animal fattening and increasing milk production. Its abuse has resulted in residues in the environment. However, even very low concentrations could still enter the human body through the enrichment of the food chain and have adverse effects on the endocrine system. The SERS analysis method was employed in this work for the trace detection of 17β-E2 in environmental water. Cheap Ag NPs were selected as SERS sources. MoS2 provided a platform for the orderly arrangement of Ag NPs while making the material self-cleaning. rGO was coated in the outermost layer and had a protective effect on Ag NPs and could avoid oxidation during storage and use. At the same time, the target molecule could be adsorbed to reduce the distance between itself and Ag NPs, thus enhancing the SERS signal. The material had a high SERS enhancement factor (EF = 1.95 × 107), low detection limit (LOD = 5 × 10–12 M), good linear relationship (R2 = 0.994), good stability (RSD = 4.74%), and strong anti-interference ability. The recovery of 17β-E2 in farm wastewater samples was 100.15–108.00% and RSDs were 1.09–2.57%.
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高影响因子
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