标题：Ionogels as Precursors To Prepare ZnS Nanoparticles for Colorimetric Sensing of Sulfide Ions
作者：Song, Shasha; Song, Dandan; Tang, Huicheng; Kang, Beibei; Lv, Junnan; Lu, Hongsheng; Zhao, Zengdian
作者机构：[Song, Shasha; Song, Dandan; Tang, Huicheng; Kang, Beibei; Lv, Junnan; Zhao, Zengdian] Shandong Univ Technol, Sch Chem & Chem Engn, Zibo 255000, Peopl 更多
通讯作者：Song, Shasha;Song, SS;Zhao, ZD
通讯作者地址：[Song, SS; Zhao, ZD]Shandong Univ Technol, Sch Chem & Chem Engn, Zibo 255000, Peoples R China.
来源：ACS SUSTAINABLE CHEMISTRY & ENGINEERING
关键词：ionogels; thermal stability; Zn NPs; peroxidase-like activity; sulfide; detection
摘要：In this study, novel supramolecular ionogels with ultrahigh efficient gelation and robust mechanical properties were prepared by mixing 4'-para-phenylcarboxyl-2,2':6',2 ''-terpyridine (PPCT) and zinc ions (Zn2+) in ethylammonium nitrate (EAN). The microstructure of the ionogels was determined to be three-dimensional networks of fibrous aggregates. X-ray diffraction and Fourier-transform infrared spectroscopy measurements demonstrated that ionogel formation involve the following steps: the terpyridine rings of PPCT form an assembled unit via pi-pi interaction, the unit further aggregates to form fibers using Zn2+ via hydrogen bonding and Zn2+ coordination, and the fibers stretch and intertwine to form a cross-linked network to immobilize EAN by solvophobic interactions, electrostatic interactions, and van der Waals forces. Rheological results revealed that ionogels exhibited high mechanical strength with an elastic modulus and a yield stress of 50 000 and 900 Pa, respectively. The ionogels of PPCT and Zn2+ mixtures served as the precursors to produce zinc sulfide (ZnS) nanoparticles (NPs). The uniform 10 nm-sized ZnS exhibited higher surface area and higher peroxidase-like activity that can be used for sulfide ion (S-2(-)) colorimetric sensing to detect S2- at a lower limit detection of 5.27 nmol-L-1. Furthermore, an innovative, green, and convenient approach has been developed to produce ZnS NPs, which are an environmentally friendly and sustainable candidate material in bioengineering technology, environmental protection, and food industries.