TY - JOUR
T1 - Platinumnitrogen-codoped TiO2 photocatalyst
T2 - Effect of acid catalysts on visible-light activity
AU - Ryu, Jungho
AU - Kim, Soonhyun
PY - 2012
Y1 - 2012
N2 - Platinumnitrogen- codoped TiO2 (PtNTiO2) was prepared by a conventional solgel process via the addition of different acid catalysts: nitric acid (HNO3), acetic acid (HAc) and both (HNO3HAc). The PtNTiO2 samples were then characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and UVvisible diffuse reflectance analysis. The samples successfully exhibited visible-light-induced photocatalysis for the degradation of dichloroacetate (DCA) and 4-chlorophenol (4-CP). The HAc/450 sample (following the notation "added acid catalyst/calcination temperature") exhibited the highest visible activity for DCA degradation. This finding can be explained by the much stronger visible absorption of the calcined samples than the uncalcined samples and the slightly larger surface area of HAc/450 compared to other calcined TiO2 samples. However, the performance of 4-CP degradation was proportional to the PtNTiO2 sample surface area regardless of visible absorption, which could be ascribed to the fact that 4-CP degradation can occur through a surface-complex-mediated pathway under visible irradiation.
AB - Platinumnitrogen- codoped TiO2 (PtNTiO2) was prepared by a conventional solgel process via the addition of different acid catalysts: nitric acid (HNO3), acetic acid (HAc) and both (HNO3HAc). The PtNTiO2 samples were then characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and UVvisible diffuse reflectance analysis. The samples successfully exhibited visible-light-induced photocatalysis for the degradation of dichloroacetate (DCA) and 4-chlorophenol (4-CP). The HAc/450 sample (following the notation "added acid catalyst/calcination temperature") exhibited the highest visible activity for DCA degradation. This finding can be explained by the much stronger visible absorption of the calcined samples than the uncalcined samples and the slightly larger surface area of HAc/450 compared to other calcined TiO2 samples. However, the performance of 4-CP degradation was proportional to the PtNTiO2 sample surface area regardless of visible absorption, which could be ascribed to the fact that 4-CP degradation can occur through a surface-complex-mediated pathway under visible irradiation.
KW - Acid catalyst
KW - Photocatalysis
KW - Platinumnitrogen-codoped TiO
KW - Solgel
KW - Visible light
UR - http://www.scopus.com/inward/record.url?scp=84870725026&partnerID=8YFLogxK
U2 - 10.2320/matertrans.M2012294
DO - 10.2320/matertrans.M2012294
M3 - Article
AN - SCOPUS:84870725026
SN - 1345-9678
VL - 53
SP - 2200
EP - 2204
JO - Materials Transactions
JF - Materials Transactions
IS - 12
ER -