TY - JOUR
ID -
TI - Calculation method of quantum efficiency to TiO_{2} nanocrystal photocatalysis reaction
AU - XIE Yi-bing
AU - YUAN Chun-wei
VL - 14
IS - 1
PB -
SP - 70
EP - 75
PY -
JF - Journal of Environmental Sciences
JA - J. Environ. Sci.
UR - http://www.jesc.ac.cn/jesc_en/ch/reader/view_abstract.aspx?file_no=20020112&flag=1
KW - photodegradation reaction; quantum efficiency; apparent quantum efficiency; photonic efficiency; relative photonic efficiency; absorption coefficient
KW - photodegradation reaction; quantum efficiency; apparent quantum efficiency; photonic efficiency; relative photonic efficiency; absorption coefficient
AB - The quantum yield is an important factor to evaluate the efficiency of photoreactor. This article gives an overall calculation method of the quantum efficiency(*ф*) and the apparent quantum efficiency(*ф*_{a}) to the TiO_{2}/UV photocatalysis system. Furthermore, for the immobility system (IS), the formulation of the faction of light absorbed by the TiO_{2} thin film is proposed so as to calculate the quantum efficiency by using the measured value and theoretic calculated value of transmissivity (T). For the suspension system(SS), due to the difficulty to obtain the absorption coefficient (α) of TiO_{2} particulates, the quantum efficiency is calculated by means of the relative photonic efficiency (ξr) and the standard quantum yield (*ф*_{standard}).
ER -