高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

阳离子交换法制备Ag2S亚纳米线及其近红外光电化学型探测器

李小丽1，李建业1，李戌焱1，王光远1，时烽田4，任云1*，胡俊平1*，李黎明2，谢迎春3，张双龙3，李冬1*   

  1. 1.邯郸学院化学化工与材料学院，河北省纳米化天然产物新材料技术创新中心，河北省杂环化合物重点实验室

    2.中船（邯郸）派瑞氢能科技有限公司

    3.邯郸市科领新材料有限公司 4.河北工程大学材料科学与工程学院

  • 收稿日期:2026-05-31 修回日期:2026-06-30 网络首发:2026-07-06 发布日期:2026-07-06
  • 通讯作者: 李冬
  • 基金资助:
    国家自然科学基金（批准号：22171062）、河北省自然科学基金面上项目(批准号：B2021109002)、河北省高等学校科学研究项目产学研合作专项(批准号：CXZX2025018)、邯郸市科学技术研究与发展计划项目(批准号：25422024196ZC)和邯郸学院校级项目(批准号： XZ2025207)资助

Cation exchange synthesis of sub-1 nm Ag2S nanowires and their near-infrared photoelectrochemical photodetectors

LI Xiaoli1, LI Jianye1, LI Xuyan1, WANG Guangyuan1, SHI Fengtian4, REN Yun1*, HU Junping1*, LI Liming2, XIE Yingchun3, ZHANG Shuanglong3, LI Dong1*   

  1. 1 College of Chemical Engineering and Materials, Technology Innovation Center of Nanosized Natural Products and New Materials of Hebei province, Hebei Key Laboratory of Heterocyclic Compounds, Handan University
    2 PERIC Hydrogen Technologies Co., Ltd. 3 Handan Clean New Materials Co., Ltd. 4 College of Materials Science and Engineering, Hebei University of Engineering
  • Received:2026-05-31 Revised:2026-06-30 Online First:2026-07-06 Published:2026-07-06
  • Supported by:
    Supported by the National Natural Science Foundation of China (No. 22171062), the Natural Science Foundation of Hebei Province of China (No. B2021109002)，the Science Research Project of Hebei Education Department(No. CXZX2025018)，the Handan Science and Technology Research and Development Program (No. 25422024196ZC) and On-campus Projects of Handan University (No.XZ2025207)

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摘要： 采用阳离子交换策略，将ZnS亚纳米线在N, N-二甲基甲酰胺（DMF）溶剂中转化为具有近红外吸收能力的Ag2S亚纳米线. 借助透射电子显微镜（TEM）、X射线光电子能谱仪（XPS）、紫外-可见-近红外分光光度计（UV-Vis-NIR）等手段，对产品的形貌、元素组成、晶体结构、光学性质进行了系统表征. 通过理论计算方法，对比研究了不同反应体系（甲苯/甲醇与DMF溶剂）中溶剂化效应对Ag2S亚纳米线制备过程的影响.鉴于该亚纳米线独特的近红外吸收特性，将其作为光活性单元，构建了光电化学型光电探测器（PEC PDs），并系统考察了其光电探测性能. 结果表明，在850 nm近红外光照射下，基于Ag2S亚纳米线的PEC PDs的开关比达到7449，响应度为120.1 mA/W，比探测率为5.91×1011 Jones，响应时间/恢复时间为0.18/0.11 s和响应范围为2 μW/cm2-8 mW/cm2.

关键词: 近红外, 光电化学型, 光电探测器, 亚纳米线, 阳离子交换法

Abstract: In this work, a cation exchange strategy is employed to convert sub-1 nm ZnS nanowires into sub-1 nm Ag2S nanowires with NIR absorption capability in N, N-dimethylformamide (DMF) solvent. The morphology, elemental composition, crystal structure, and optical properties of these products are systematically characterized using transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and UV-Vis-NIR spectrophotometry (UV-Vis-NIR). Theoretical calculations are performed to comparatively investigate the influence of solvation effects on the preparation process of sub-1 nm Ag2S nanowires in different reaction systems (toluene/methanol mixed solvent vs. DMF solvent). Leveraging the unique NIR absorption characteristics of these sub-1 nm nanowires, they are employed as photoactive units to construct photoelectrochemical photodetectors (PEC PDs), and their photodetection performance is systematically evaluated. The results demonstrate that under 850 nm NIR light irradiation, the Ag2S sub-1 nm nanowire-based PEC PDs exhibit an on/off ratio of 7449, a responsivity of 120.1 mA/W, a specific detectivity of 5.91×1011 Jones, the rise time/decay time of 0.18/0.11 s and a response range from 2 μW/cm2 to 8 mW/cm2.

Key words: Near-infrared; photoelectrochemical, Photodetector, sub-1 nm, cation exchange method

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