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通过高温固相反应合成了N掺杂的SrTiO3和(SrTiO3)1-x(SrTaO2N)x固溶体,对其进行了X射线衍射,紫外可见吸收光谱,X射线光电子能谱分析和比表面积的表征。随x由0增大至0.4,固溶体带隙变窄,由3.2eV降至2.3eV,吸收光谱由紫外光区扩展到可见光区。在甲醇溶液(50mLCH3OH+220mLH2O)中进行了光催化分解水产生氢气的反应,在硝酸银溶液(270mL,0.01mol·L-1)中进行了光催化分解水产生氧气的反应,在可见光(λ>420nm)照射下,实现了可见光响应的光催化分解水。
N-doped SrTiO3 and (SrTiO3) 1-x (SrTaO2N) x solid solutions were synthesized by high-temperature solid-state reaction. The solid solutions were characterized by X-ray diffraction, UV-Vis absorption spectrum, X-ray photoelectron spectroscopy and specific surface area. With the increase of x from 0 to 0.4, the band gap of the solid solution narrows from 3.2 eV to 2.3 eV, and the absorption spectrum extends from the ultraviolet region to the visible region. The reaction of photocatalytically decomposing water to generate hydrogen gas was performed in a methanol solution (50 mL of CH 3 OH + 220 mL of H 2 O). In a silver nitrate solution (270 mL, 0.01 mol·L -1) > 420nm) irradiation, to achieve a visible light response to photocatalytic decomposition of water.