(江蘇大學(xué) 化學(xué)化工學(xué)院, 鎮(zhèn)江 212013)
摘 要: 以成本低廉的偏鈦酸為起始反應(yīng)物, 含羧基或羥基的有機化合物為修飾劑, 采用水熱合成法進(jìn)行了納米金紅石型二氧化鈦的合成研究, 利用XRD和TEM等對制得的納米二氧化鈦進(jìn)行表征。 結(jié)果表明： 含羧基或羥基的有機化合物在修飾劑條件下都制得了納米金紅石型二氧化鈦, 且修飾劑的加入抑制了棒狀納米二氧化鈦的顆粒大小, 其中修飾劑的空間位阻效應(yīng)在控制合成小尺寸二氧化鈦納米棒中起主要作用, 且修飾劑的羥基和羧基的絡(luò)合作用對顆粒的生長也起到抑制作用。
關(guān)鍵字: 偏鈦酸； 粒徑可控金紅石型TiO2； 有機修飾劑
size-controlled rutile TiO2 nanoparticles
JIANG Tin, g-shun, LING Qi, CAO Yang
（Faculty of Chemistry and Chemical Engineering, Zhenjiang 212013, China）
Abstract: The size-controlled hydrothermal synthesis of phase-pure rutile TiO2 nanoparticles was carried out using low cost metatitanic acid and hydroxyl and carboxyl group-containing organic compounds as starting material and modifiers, respectively. The specimens were characterized by X-ray diffractometry (XRD) and transmission electron microscopy (TEM). The results show that the phase-pure rutile TiO2 is synthesized by the hydroxyl and carboxyl group-containing modifiers, and the average length and diameter of prepared rod-like rutile TiO2 nanoparticles decrease. The space oriented blocks of modifiers favor the formation of small-sized rutile TiO2 nano-rods, at the same time, the coordination between carboxyl or hydroxyl group of modifiers and TiO2 nanoparticles also inhibit the TiO2 crystal growth, resulting in small-sized rutile nanoparticles.
Key words: metatitanic acid; size controlled rutile TiO2; organic modifiers
