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One-step sol-gel synthesis of PbTiO 3 nanosheets and photocatalytic enhancement through decoration by platinum
Journal of Nanoparticle Research ( IF 2.5 ) Pub Date : 2020-09-01 , DOI: 10.1007/s11051-020-04989-2
Mohammad W. Kadi , Reda M. Mohamed

Mesoporous PbTiO3 nanosheets were synthesized by a one-step sol-gel process employing the F127 surfactant as a structure directing agent. Different percentages of platinum nanoparticles (0.2–0.8 wt%) were deposited onto mesoporous PbTiO3 nanosheets surface employing a photoassisted deposition method. TEM images of Pt@PbTiO3 mesoporous nanocomposites show the close proximity of lattice fringes 0.220 nm of metallic platinum (111) and the 0.284 nm lattice layout of the PbTiO3 (101). The synthesized Pt@PbTiO3 mesoporous composites were tested in the presence of glycerol employing visible light derived photocatalytic water splitting reaction. The H2 evolution rate with the use of 0.6 wt% Pt@PbTiO3 reached 3564 μmol/g, which is 85 times higher than the rate when pure mesoporous PbTiO3 was used. The H2 evolution rate when using PbTiO3 was 42 μmol g−1 h−1, which was enhanced to 3564 μmol g−1 h−1 upon the use of 0.6 wt% Pt@PbTiO3. Pt@PbTiO3 nanocomposites exhibit excellent photocatalytic activity with outstanding stability and enhanced possibility of reuse with a potential to be used in environmental and energy applications.



中文翻译:

一步法溶胶-凝胶法合成PbTiO 3纳米片并通过铂修饰光催化增强

介孔的PbTiO 3纳米片是采用F127表面活性剂作为结构导向剂,通过一步溶胶-凝胶法合成的。采用光辅助沉积方法,将不同百分比的铂纳米颗粒(0.2–0.8 wt%)沉积在中孔PbTiO 3纳米片表面上。Pt @ PbTiO 3介孔纳米复合材料的TEM图像显示,金属铂(111)的晶格条纹为0.220 nm,PbTiO 3(101)的晶格布局为0.284 nm 。在可见光衍生的光催化水分解反应条件下,在甘油存在下测试了合成的Pt @ PbTiO 3介孔复合材料。H 2使用0.6wt%的Pt @ PbTiO 3的析出速率达到3564μmol/ g,这是使用纯中孔PbTiO 3的速率的85倍。为H 2使用的PbTiO时释放速率3为42微摩尔克-1  ħ -1,这是增强的3564微摩尔克-1  ħ -1于使用0.6重量%Pt的PbTiO @的3。Pt @ PbTiO 3纳米复合材料具有出色的光催化活性,具有出色的稳定性和增强的再利用可能性,可用于环境和能源应用。

更新日期:2020-09-01
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