Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Investigation of Photocatalytic Activity of Nano-Sized TiO2 with the Presence of Various Inorganic Anions.
AU - Zhang, Yun
AU - Ji, Xiaobo
AU - Li, Hong
AU - Chen, Jianying
AU - Wang, Yuan
PY - 2009/6
Y1 - 2009/6
N2 - The effect of various anions on the photocatalytic activity of nano-sized TiO2 was investigated in a methyl orange solution. The photocatalytic activity of the TiO2 nanoparticles was significantly affected in the presence of SO2−4, CO2−3, NO−3 and Cl−. Among the tested ions, Cl− was most effective anion in changing the photocatalytic activity. Addition of Cl− (0.05 M) decreased the methyl orange photodegradation rate to only one quarter of that when TiO2 was used alone. It was also demonstrated that the effects of these inions, on the rate of photocatalytic activity of the nanoparticles, were concentration dependent. There was a negative correlation between the concentrations of NO−3 and Cl− and the methyl orange degradation rate by TiO2. However, at low concentrations, CO2−3 and SO2−4 enhanced the photocatalytic activity; while at the higher concentrations, these two anions inhibited the photocatalytic activity of TiO2
AB - The effect of various anions on the photocatalytic activity of nano-sized TiO2 was investigated in a methyl orange solution. The photocatalytic activity of the TiO2 nanoparticles was significantly affected in the presence of SO2−4, CO2−3, NO−3 and Cl−. Among the tested ions, Cl− was most effective anion in changing the photocatalytic activity. Addition of Cl− (0.05 M) decreased the methyl orange photodegradation rate to only one quarter of that when TiO2 was used alone. It was also demonstrated that the effects of these inions, on the rate of photocatalytic activity of the nanoparticles, were concentration dependent. There was a negative correlation between the concentrations of NO−3 and Cl− and the methyl orange degradation rate by TiO2. However, at low concentrations, CO2−3 and SO2−4 enhanced the photocatalytic activity; while at the higher concentrations, these two anions inhibited the photocatalytic activity of TiO2
U2 - 10.1166/jnn.2009.NS43
DO - 10.1166/jnn.2009.NS43
M3 - Journal article
VL - 9
SP - 3639
EP - 3643
JO - Journal of Nanoscience and Nanotechnology
JF - Journal of Nanoscience and Nanotechnology
SN - 1533-4880
IS - 6
ER -