TY - JOUR
T1 - Visible light photocatalytic activities of template free porous graphitic carbon nitride—BiOBr composite catalysts towards the mineralization of reactive dyes
AU - Kanagaraj, Thamaraiselvi
AU - Thiripuranthagan, Sivakumar
AU - Paskalis, Sahaya Murphin Kumar
AU - Abe, Hideki
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017/12/31
Y1 - 2017/12/31
N2 - Template free porous g-C 3 N 4 (pGCN) and flower like bismuth oxybromide catalysts were synthesized by poly condensation and precipitation methods respectively. Various weight percentages of porous GCN-BiOBr composite catalysts (x% pGCN-BiOBr where x = 5, 10, 30, 50 & 70 wt% of pGCN) were synthesized by impregnation method. All the synthesized catalysts were characterized by X-Ray diffractometer, Fourier transform infrared spectrophotometer, BET surface area analyzer, UV Visible diffuse reflectance spectrophotometer, X-Ray photoelectron spectrophotometer, SEM with Energy dispersive X-ray analyzer (SEM/EDAX) and elemental mapping, Transmission electron microscope, Photoluminescence spectrophotometer and Electrochemical impedance. Photocatalytic degradation of all the synthesized catalysts were tested towards the harmful reactive dyes such as reactive blue 198 (RB 198), reactive black 5 (RB 5) and reactive yellow 145 (RY 145) in presence of visible irradiation. Among the catalysts 30% pGCN-BiOBr resulted in the highest photocatalytic activity towards the degradation of all the three dyes in presence of UV, visible and solar irradiations. Kinetics studies on the photocatalytic mineralization of dyes indicated that it followed pseudo first order. HPLC, TOC and COD studies confirm that the dyes are mineralized into CO 2 , water and mineral salts.
AB - Template free porous g-C 3 N 4 (pGCN) and flower like bismuth oxybromide catalysts were synthesized by poly condensation and precipitation methods respectively. Various weight percentages of porous GCN-BiOBr composite catalysts (x% pGCN-BiOBr where x = 5, 10, 30, 50 & 70 wt% of pGCN) were synthesized by impregnation method. All the synthesized catalysts were characterized by X-Ray diffractometer, Fourier transform infrared spectrophotometer, BET surface area analyzer, UV Visible diffuse reflectance spectrophotometer, X-Ray photoelectron spectrophotometer, SEM with Energy dispersive X-ray analyzer (SEM/EDAX) and elemental mapping, Transmission electron microscope, Photoluminescence spectrophotometer and Electrochemical impedance. Photocatalytic degradation of all the synthesized catalysts were tested towards the harmful reactive dyes such as reactive blue 198 (RB 198), reactive black 5 (RB 5) and reactive yellow 145 (RY 145) in presence of visible irradiation. Among the catalysts 30% pGCN-BiOBr resulted in the highest photocatalytic activity towards the degradation of all the three dyes in presence of UV, visible and solar irradiations. Kinetics studies on the photocatalytic mineralization of dyes indicated that it followed pseudo first order. HPLC, TOC and COD studies confirm that the dyes are mineralized into CO 2 , water and mineral salts.
KW - BiOBr
KW - Photodegradation
KW - Photomineralization
KW - Porous composite catalyst
KW - Porous g-C N
KW - Reactive dyes
UR - https://www.scopus.com/pages/publications/85026752681
U2 - 10.1016/j.apsusc.2017.07.255
DO - 10.1016/j.apsusc.2017.07.255
M3 - Article
AN - SCOPUS:85026752681
SN - 0169-4332
VL - 426
SP - 1030
EP - 1045
JO - Applied Surface Science
JF - Applied Surface Science
ER -