Citation: Linlin Sun, Yaju Zhou, Xin Li, Jinze Li, Dong Shen, Shikang Yin, Huiqin Wang, Pengwei Huo, Yongsheng Yan. Thermo-responsive functionalized PNIPAM@Ag/Ag₃PO₄/CN-heterostructure photocatalyst with switchable photocatalytic activity[J]. Chinese Journal of Catalysis, ;2020, 41(10): 1573-1588. doi: 10.1016/S1872-2067(20)63554-9 shu

Thermo-responsive functionalized PNIPAM@Ag/Ag₃PO₄/CN-heterostructure photocatalyst with switchable photocatalytic activity

Linlin Sun ^a, ,
Yaju Zhou ^a ,
Xin Li ^a ,
Jinze Li ^a ,
Dong Shen ^a ,
Shikang Yin ^a ,
Huiqin Wang ^b ,
Pengwei Huo ^a ,
Yongsheng Yan ^a

a Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China;
b School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China

Received Date: 25 February 2020
Revised Date: 21 March 2020

Fund Project: This work was supported by the National Natural Science Foundation of China (21576125 and 21776117), the China Postdoctoral Science Foundation (2017M611734), and the Six Talent Peaks Project in Jiangsu Province (XCL-014).

It is extremely important for photocatalysts to exhibit intelligent responsiveness to their environment. Herein, a poly N-isopropyl acrylamide (PNIPAM)-modified Ag/Ag₃PO₄-20/CN hybrid material with excellent convertible photocatalytic activity is prepared. PNIPAM has good hydrophilicity below the lower critical solution temperature (LCST); this increases the capacity of the photocatalyst for adsorbing tetracycline (TC) molecules. In addition, the PNIPAM-modified Ag/Ag₃PO₄-20/CN can prevent the loss of Ag₃PO₄. The dispersity is improved by loading g-C₃N₄ nanosheets (CN) for enhancing the efficiency of photocatalytic activity. Furthermore, a Z-scheme heterostructure is formed between CN and Ag₃PO₄, accelerating the separation efficiency of the holes and electrons. Ag nanoparticles can be used as electron-shuttle mediators, and electrons receiving more energy are transferred via the localized surface plasmon resonance (LSPR) effect. Furthermore, the PNIPAM@Ag/Ag₃PO₄-20/CN photocatalyst exhibits an excellent degradation rate for the degradation of TC when the temperature is lower than the LCST. The photoluminescence spectra and photocurrent curves prove that the carrier-separation efficiency of PNIPAM@Ag/Ag₃PO₄-20/CN is higher than those of Ag/Ag₃PO₄/CN and CN. The main active species of·O₂^- and h⁺ are detected to reveal the plausible mechanism of the PNIPAM@Ag/Ag₃PO₄-20/CN hybrid material system. This work provides a way to develop intelligent materials for switchable photocatalytic applications.
- Intelligent responsiveness,
- g-C₃N₄ nanosheets,
- Ag₃PO₄,
- Ag,
- Poly N-isopropyl acrylamide
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沈阳化工大学材料科学与工程学院沈阳 110142

Thermo-responsive functionalized PNIPAM@Ag/Ag3PO4/CN-heterostructure photocatalyst with switchable photocatalytic activity

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通讯作者: 陈斌, bchen63@163.com

Thermo-responsive functionalized PNIPAM@Ag/Ag₃PO₄/CN-heterostructure photocatalyst with switchable photocatalytic activity