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Recycling valuable silver from waste generated in diverse nanotemplate reactions

多种纳米模板反应中高价值银的回收与重复利用

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Abstract

The shape-controlled silver nanostructures have been widely used for template synthesis of metal nanostructures with desired morphologies and compositions for specific applications by galvanic replacement reaction, while the silver is sacrificed as oxidized to silver ion and abandoned as by-products. In view of the broad application prospect of the obtained metal nanostructures, the cost and environment problems after the template reactions should be taken into account for the large scale production in the future. To solve this problem, we conceptually demonstrate that the wasted AgCl generated from the template reactions can be easily recycled for the synthesis of valuable Ag nanowires. As representative examples, the average recovery of silver can be about 69.8%–84.6% after the template synthesis of Au/Pt nanostructures. The resynthesized Ag nanowires show uniform size distribution and excellent physical and chemical properties for the fabrication of transparent electrode and template synthesis.

摘要

利用银纳米材料的反应活性, 通过模板反应可以制备形貌和结构可控的多种金属纳米结构, 然而, 在模板反应过程中, 银纳米模板剂通常被氧化成银离子作为副产物被遗弃. 考虑到金属纳米结构具有的广泛应用前景, 以银为模板剂大规模制备各种金属纳米结构过程中的成本和环境问题必须予以关注. 为了解决这个问题, 我们对此类模板反应过程中所产生的废弃副产物氯化银进行了回收, 并以此为原料成功的制备出高质量的银纳米线. 以模板反应制备金/铂纳米结构为例, 银的平均回收率可达到69.8%∼84.6%. 此外, 利用废弃副产物重新合成的银纳米线具有均一的尺寸分布, 在模板反应和制备透明导电电极方面表现出优异的化学和物理性能.

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Authors and Affiliations

  1. Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, University of Science and Technology of China, Hefei, 230026, China

    Jin-Long Wang  (王金龙), Zhi-Hua Wang  (王智华), Jian-Wei Liu  (刘建伟) & Shu-Hong Yu  (俞书宏)

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  1. Jin-Long Wang  (王金龙)
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  2. Zhi-Hua Wang  (王智华)
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  3. Jian-Wei Liu  (刘建伟)
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  4. Shu-Hong Yu  (俞书宏)
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Corresponding authors

Correspondence to Jian-Wei Liu  (刘建伟) or Shu-Hong Yu  (俞书宏).

Additional information

Jin-Long Wang received his bachelor degree majored in material chemistry from China University of Petroleum in 2011. Then he joined the University of Science and Technology of China and conducted research under the supervision of Prof. Shu-Hong Yu. His research interest is to recycle the valuable products from waste in chemical synthesis.

Jian-Wei Liu received his BSc degree majored in chemical engineering and technology from Hefei University of Technology in 2007, and his PhD degree in nano-chemistry under the supervision of Prof. Shu-Hong Yu from the University of Science and Technology of China. He is interested in the synthesis and self-assembly of one dimensional nanomaterials as well as nano-device fabrication based on well aligned nanowires.

Shu-Hong Yu received his BSc at Hefei University of Technology and his PhD degree (inorganic chemistry) from the University of Science and Technology of China (USTC). He was a postdoctoral fellow with M. Yoshimura (Tokyo Institute of Technology) and a Humboldt Fellow with M. Antonietti and H. Cölfen (MPI of Colloids and Interfaces, Germany). In 2002, he was appointed the Cheung Kong Professor at USTC. Currently, he leads the Division of Nanomaterials & Chemistry at the Hefei National Laboratory for Physical Sciences at Microscale, USTC. His current research interests include bio-inspired synthesis and self-assembly of new nanostructured materials and nanocomposites, and their related properties. He serves as an editorial advisory board member of journals Accounts of Chemical Research, Chemistry of Materials, Chemical Science, Materials Horizons, Nano Research, ChemNanoMat, CrystEngComm, Part. Part. Syst. Charact. and Current Nanoscience. His recent awards include Chem. Soc. Rev. Emerging Investigator Award (2010) and Roy-Somiya Medal of the International Solvothermal and Hydrothermal Association (ISHA) (2010).

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Wang, JL., Wang, ZH., Liu, JW. et al. Recycling valuable silver from waste generated in diverse nanotemplate reactions. Sci. China Mater. 59, 538–546 (2016). https://doi.org/10.1007/s40843-016-5078-x

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