Bastakoti Bishnu Prasad, Torad Nagy L, Yamauchi Yusuke
World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) , 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
ACS Appl Mater Interfaces. 2014 Jan 22;6(2):854-60. doi: 10.1021/am4039954. Epub 2013 Dec 27.
Platinum-decorated mesoporous TiO2 is synthesized by the self-assembly of polymeric micelles of an asymmetric triblock copolymer with three chemically distinct units in an acidic tetrahydrofuran solution. The strong hydrophobic interaction of platinum(II) 2,4-pentanedionate with a polystyrene core and electrostatic interaction of titanium tetraisopropoxide with a poly(vinylpyridine) shell enable us to directly synthesize crystalline mesoporous TiO2 with platinum nanoparticles. A thermally stable block copolymer prevents collapse of the ordered mesostructure during the calcination process. The platinum source is in situ reduced to form the platinum nanoparticles on the TiO2 walls. The sensing performance of platinum-decorated mesoporous TiO2 is studied in detail using a quartz crystal microbalance technique, and it is found that it shows excellent sensitivity for acetaldehyde.
通过在酸性四氢呋喃溶液中，具有三个化学性质不同单元的不对称三嵌段共聚物的聚合物胶束自组装合成了铂修饰的介孔二氧化钛。铂（II）2,4-戊二酮与聚苯乙烯核的强疏水相互作用以及四异丙醇钛与聚乙烯吡啶壳的静电相互作用，使我们能够直接合成带有铂纳米颗粒的结晶介孔二氧化钛。热稳定的嵌段共聚物可防止在煅烧过程中有序介观结构的坍塌。铂源原位还原，在二氧化钛壁上形成铂纳米颗粒。使用石英晶体微天平技术详细研究了铂修饰的介孔二氧化钛的传感性能，发现它对乙醛表现出优异的灵敏度。
