Exfoliation and Restacking Route to Anatase-Layered Titanate Nanohybrid with Enhanced Photocatalytic Activity
Exfoliation and Restacking Route to Anatase-Layered Titanate Nanohybrid with Enhanced Photocatalytic Activity
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DOI：
10.1021/cm010815m
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发表时间：
2002-05
影响因子：
8.6
通讯作者：
J. Choy;Hyun-Cheol Lee;H. Jung;Hasuck Kim;H. Boo
中科院分区：
文献类型：
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作者：
J. Choy;Hyun-Cheol Lee;H. Jung;Hasuck Kim;H. Boo
将剥离的钛酸盐与锐钛矿型TiO2纳米溶胶进行杂化，制备了一种新型的微孔二氧化钛柱层状钛酸盐。将四丁基胺插入层状钛酸质子HxTi2-x/4□x/4O4·H2O （x = 0.67）中，得到了具有蛭石样结构的稳定胶体纳米片。将剥离钛酸片的胶体悬浮液与异丙醇钛与乙酰丙酮水解制备的单分散锐钛矿型TiO2纳米溶胶溶液混合。将得到的纳米杂化物在300℃下加热2 h，以完成插层锐钛矿型TiO2纳米溶胶在层状钛酸盐层间表面的接枝反应。根据x射线衍射分析和N2吸附-解吸等温线，发现tio2柱状层状钛酸盐柱高约2 nm，比表面积约460 m2/g，孔径约0.95 nm，表明形成了微孔柱状结构。对其光催化活性进行了评价。
A new microporous TiO2-pillared layered titanate has been prepared by hybridizing the exfoliated titanate with the anatase TiO2 nanosol. The stable colloidal nano-sheet was obtained by intercalating tetrabutylamine into the layered protonic titanate, HxTi2-x/4□x/4O4·H2O (x = 0.67), with a lepidocrocite-like structure. The colloidal suspension of exfoliated titanate sheets was mixed with the monodispersed anatase TiO2 nanosol solution prepared by the hydrolysis of titanium isopropoxide with acetylacetone. The obtained nanohybrid was heated at 300 °C for 2 h in order to complete the grafting reaction of intercalated anatase TiO2 nanosol on the interlayer surface of layered titanate. According to the X-ray diffraction analysis and N2 adsorption−desorption isotherms, it was found that the TiO2-pillared layered titanate showed a pillar height of ∼2 nm, a high surface area of ∼460 m2/g, and a pore size of ∼0.95 nm, indicating the formation of a microporous pillar structure. Its photocatalytic activity was evalu...