Phase Transformation Synthesis of Novel Ag₂O/Ag₂CO₃ Heterostructures with High Visible Light Efficiency in Photocatalytic Degradation of Pollutants

Abstract

Coreshell-like Ag2 O/Ag2 CO3 nanoheterostructures with tailored interface are fabricated by a facile, low-cost and one-step phase transformation method. The unique bandgap structure of the Ag2 O/Ag2 CO3 exhibits high separation efficiency of photogenerated electrons and holes, which effectively protects the Ag2 CO3 semiconductor to avoid its photoreduction and gives rise to high activity and stability in degradation of the typical water pollutants.

Construction of a 2D Graphene‐Like MoS2/C3N4 Heterojunction with Enhanced Visible‐Light Photocatalytic Activity and Photoelectrochemical Activity

“…The first peak wasr elatedt oc ontaminationf rom the air and the latter to N-C-N coordination in the material. [46] Figure 2B shows the high-resolution N1ss pectrum of GLMoS 2 /C 3 N 4 .T he asymmetricalN 1s peak could be fitted by three peaks at 398.6, 399.8, and 401.0 eV,s uggesting three types of Na toms, C=NÀC, NÀ(C) 3 ,C ÀNÀH, in the sample. [10,22,44] Figure 2C shows the high-resolutionM o3ds pectrum of the sample.…”

“…These experiments were performed in 0. 3 , Cr(NO 3 ) 3 ,A gNO 3 ,C uSO 4 ,Z n(NO 3 ) 2 ,a nd CoCl 2 ,r espectively,i nw ater. As tock solution of Hg 2 + was also prepared by dissolving HgSO 4 (14.8 mg) in water (50 mL) containing concentrated HCl (0.3 mL).…”

Role of zinc interstitials and oxygen vacancies of ZnO in photocatalysis: a bottom-up approach to control defect density

“…[1][2][3] However, to increase the efficiency of a semiconductor catalyst one needs to isolate 4 or at least delay the recombination of photogenerated electrons and holes. 1,[5][6][7][8][9][10][11][12][13] To achieve this, lattice defects are induced in the semiconductor 1,6,[8][9][10][11][12][13] in addition to the fabrication of heterojunctions (either with noble metals [5][6][7] or another semiconductors 4,14 ). In connection to lattice defects, depending on the type and energetic location of the defect, their character is determined to capture either an electron or a hole, thereby delaying the recombination process.…”

Transformation of polymer-ZnO core–shell nanofibers into ZnO hollow nanofibers: Intrinsic defect reorganization in ZnO and its influence on the photocatalysis

“…This not only minimizes the usage of catalyst but also enhances the active sites on the surface [10][11][12][13]18]. One should note that other significant attempts of enhancing the photocatalytic activity (PCA) or delaying the recombination are lattice defects [12,16,[18][19][20][21][22][23], heterojunctions [4,10,[14][15][16][17][24][25][26] etc. It is also notable that PCA is a very complex process and it is an integral effect of surface sites, bulk of the lattice etc.…”