PbS插层K2Ti4O9催化剂:制备及光催化制氢活性

摘要

PbS intercalated K2Ti4O9 was prepared via high-temperature solid-state reaction, ion exchange, sulfuration process. The material was characterized by XRD, TEM, SEM, XRF, PL, and UV-Vis spectroscopy. The activity of the photocatalysis for hydrogen evolution was determined under UV light and visible light irradiation, respectively. The results reveal that PbS intercalated K2Ti4O9 catalyst has a wide absorption range for visible light, and the absorption edge is at 710 nm. The photocatalytic hydrogen production activity after irradiation for 3 h under UV light and visible light over PbS intercalated K2Ti4O9 is 115.46 mmol·gcat-1 and 0.92 mmol·gcat-1, respectively. The photocatalytic activity of the title material is higher than that of CdS intercalated layered K2Ti4O9.%利用高温固相反应、离子交换、层间插入反应和硫化处理制备了PbS插层的K2Ti4O9催化剂.利用XRD、TEM、SEM、XRF、PL和紫外-可见漫反射光谱对催化剂进行了表征,考察了催化剂紫外光和可见光光催化制氢活性.结果表明,制备的PbS插层K2Ti4O9催化剂对可见光的吸收范围较宽,其吸收边界约为710 nm,在紫外光和可见光下3h累积产氢量可达到115.46 mmol·gcat-1和0.92 mmol·gcat-1,与CdS插层K2Ti4O9催化剂相比具有更高的催化活性.