Distinct photoluminescence enhancement of supercritical water reacted tin dioxide
Journal
High Temperature Materials and Processes
Journal Volume
29
Journal Issue
4
Pages
247-257
Date Issued
2010
Author(s)
Abstract
Intrinsic stoichiometric SnO2 has no photoluminescence effect. However, it is found that supercritical water reacted SnO2 show pronounced photoluminescence (PL) phenomenon. Thermal gravimetric analysis measurement reveals that a molar ratio (H2O : SnO2 =1 : 10) of water is introduced into the SnO2 structure after the supercritical hydrothermal reaction. The mechanism of the PL is attributed to low-coordinated tin with oxygen vacancies caused by dissociative water adsorption. Moreover, the optical absorption spectra of the supercritical water reacted SnO2 are matched by two configurations from ab-initio calculation.
SDGs
Type
journal article