SrTiO_3粉末在可见光照射下光氧化水产氧的研究

OXYGEN PHOTOPRODUCTION BY SrTiO_3 SUSPENSION WITH VISIBLE LIGHT

SrTiO_3粉末在FeCl_3水溶液里的悬浮体([Fe^(3+)]=1.0×10^(-3)mol/L,pH2.8,SrTiO_3含量1.25g/L)能在λ>400 nm的可见光照射下光氧化水产氧。在相同条件下SrTiO_3和WO_3粉末的混合悬浮体(SrTiO_3与WO_3含量均为1.25g/L)产氧的速率为两者单独存在时的速率之和。光声光谱实验显示SrTiO_3粉末在从溶液里吸附Fe^(3+)后对可见光的吸收大大增强,使它能在可见光下光氧化水产氧。

Oxygen was produced with visible light from SrTiO2 suspension which was made up of SrTiOs powder and ferric aqueous solution. Under the special condition ([Fe2+] =1.0×10-3 mol/L, pH 2.8, SrTiO3 and WO3 powders, 1.25g/L each), the O2 photoproduction from SrTiO3 and WO3 mixed suspension equaled the sum of the O2 production from SrTiO3 and WO2 each. The photoacounstic spectra of absorption of SrTiO3 powders showed that the Fe2+ ions adsorbed on SrTiO3 powders greatly enhanced their viible light absorption.