【摘 要】
：
Anatase nanoparticles modified by sulfate groups were synthesized using hydrother- mal method. The particles were controlled to large sizes by simply adjusting
【机 构】
：
State Key Laboratory of Structural Chemistry,Graduate School of the Chinese Academy of Sciences
【基金项目】
：
Science and Technology Program from Fujian Province;国家自然科学基金;Hundreds Youth Talents Program of CAS (LiGS)
论文部分内容阅读
Anatase nanoparticles modified by sulfate groups were synthesized using hydrother- mal method. The particles were controlled to large sizes by simply adjusting the amount of H2O2, in which HOO- ions replaced the surface sulfate groups and reduced the steric effect to promote the grain growth. The size-induced microstructural changes of the as-prepared nanoparticles were characterized using powder XRD, FT-IR, TG, and UV-vis analyses. The sulfate groups existed on anatase surface in unidentate and bidentate coordination forms. With the particle size reduction, bandgap energies of the as-prepared anatase nanoparticles decreased, and the desorption temperature of sulfate groups shifted towards lower temperatures.
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