Facile Synthesis of Nanostructured Anatase Titania with Controllable Morphology via Oxidation of TiC with Hydrogen Peroxide
Facile Synthesis of Nanostructured Anatase Titania with Controllable Morphology via Oxidation of TiC with Hydrogen Peroxide
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通过过氧化氢氧化 TiC 轻松合成具有可控形貌的纳米结构锐钛矿二氧化钛
DOI：
10.1155/2016/6325615
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发表时间：
2016-03
影响因子：
--
通讯作者：
Hu, WenTao
中科院分区：
文献类型：
--
作者：
Ren, Yuduo;Hu, WenTao
用H2O2氧化TiC制备了形貌可控的纳米锐钛矿TiO2。在室温下，TiC与H2O2反应，TiC溶解于H2O2水溶液中，生成酸性溶液。将酸性溶液在80℃空气中干燥，得到了具有草酸盐配体的聚钛酸无定形粉末，其形貌与反应时间有关。将无定形酸性粉末在350℃下退火，制备出形貌可控的纳米锐钛矿TiO2。根据氧化时间的不同，可以制备成海绵状、花状、海绵状球等形态。纳米锐钛矿TiO2在900℃前的热处理过程中是稳定的，其形貌可以调整为纳米晶状。除退火方法外，在常温条件下对酸性溶液进行时效处理可直接形成稻形锐钛矿纳米晶。
Nanostructured anatase TiO2 with controllable morphology has been fabricated via the oxidation of TiC with H2O2. At room temperature, the reaction of TiC with H2O2 leads to dissolution of TiC into H2O2 aqueous solution, producing an acidic solution. By drying the acidic solution at 80°C in air, an amorphous powder of polytitanic acid with oxalate ligands is obtained, and its morphology is found to rely on the reaction time. By annealing the amorphous acidic powder at T > 350°C, the nanostructured anatase TiO2 with controllable morphology is generated. Depending on the oxidation time, the morphology can be fabricated as sponge-like shape, flower-like shape, spongy balls, and so forth. The nanostructured anatase TiO2 is stable under the heating treatments until 900°C, and its morphology can be tuned to the nanocrystalline grains. In addition to the annealing way, rice-shaped anatase nanocrystals can be directly formed by aging the acidic solution under ambient conditions.
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影响因子：
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作者：
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发表时间：
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影响因子：
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