title: Nitrogen-doped carbon quantum dots/Ag3PO4complex photocatalysts with enhanced visible light driven photocatalytic activity and stability.
abstract: Novel nitrogen-doped carbon quantum dots/Ag3PO4(NCQDs/Ag3PO4) complex photocatalysts were synthesized by a facile precipitation method at room temperature. The physical and chemical properties of Ag3PO4and NCQDs/Ag3PO4photocatalysts were detected through X-ray powder diffraction, field emission scanning electron microscopy, UV-vis diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy and electron spin resonance techniques. The as-prepared 3-NCQDs/Ag3PO4composite exhibited much higher activity than the pure Ag3PO4for eliminating methyl orange and bisphenol A solution under visible light (λ>420nm). Moreover, in the cyclic experiments, the 3-NCQDs/Ag3PO4exhibited an excellent stability for the decolorization of methyl orange at some level. This suggested that NCQDs played an important role in the process of degradation. The function of NCQDs was discussed and a new mechanism was put forward for the degradation of methyl orange. The high activities and stability were attributed to the transfer of photogenerated charges through the vector of Ag3PO4→NCQDs→Ag in the photocatalytic process, leading to effective charge separation of Ag3PO4.
authors.affiliation: College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China.
authors.forename: Quanyi
authors.initials: Q
authors.lastname: Chen
authors.affiliation: College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China. Electronic address: wyfwyf53540708@sina.com.
authors.forename: Yunfang
authors.initials: Y
authors.lastname: Wang
authors.affiliation: College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China.
authors.forename: Yawen
authors.initials: Y
authors.lastname: Wang
authors.affiliation: College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China.
authors.forename: Xiaochao
authors.initials: X
authors.lastname: Zhang
authors.affiliation: College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China.
authors.forename: Donghong
authors.initials: D
authors.lastname: Duan
authors.affiliation: College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China.
authors.forename: Caimei
authors.initials: C
authors.lastname: Fan
keywords: Degradation; NCQDs/Ag(3)PO(4); Photocatalytic; Visible light