镍铁水滑石/聚S,S-二氧-二苯并噻吩复合材料的合成及其光催化产氢性能

Synthesis and photocatalytic hydrogen production performance of nickel-iron hydrotalcite/poly(dibenzothiophene-S,S-dioxide)composites

镍铁水滑石(LDH)(Ni_(7)Fe_(1))易于合成、来源丰富、价格低廉,是目前催化体系中性能优良的催化剂之一,可望用于替代成本高昂的贵金属催化剂。采用原位聚合法将二维层状结构的Ni_(7)Fe_(1)与聚S,S-二氧-二苯并噻吩(PDBTSO)复合,制备了无机/有机复合材料Ni_(7)Fe_(1)/PDBTSO,并验证了其光催化性能。实验得到:复合材料15-Ni_(7)Fe_(1)/PDBTSO相较于添加3wt%Pt助催化剂PDBTSO的光催化产氢效率提高了22.6%,其产氢效率达到36.8 mmol·g^(−1)·h^(−1)且具有良好的循环稳定性,表明Ni_(7)Fe_(1)为替代光催化制氢反应中贵金属助催化剂理想的候选材料之一。结合XRD、FTIR、TEM和XPS等手段进一步讨论了复合材料光催化产氢的机制。Ni_(7)Fe_(1)/PDBTSO高效的光催化制氢性能及低成本的制备方法为光催化制氢领域提供了新的思路。

Two-dimensional layered double hydroxide(LDH)of Ni_(7)Fe_(1) is the most excellent catalyst in the catalytic system for its facile preparation,abundant sources,and low-cost,which is also an ideal substitute for noble metal catalyst in photocatalytic production.In this study,we prepared composites of Ni_(7)Fe_(1)/PDBTSO by in-situ polymerization of Ni_(7)Fe_(1) and poly(dibenzothiophene-S,S-dioxide)(PDBTSO).Furthermore,we investigated their catalytic performance.The experimental results show that 15-Ni_(7)Fe_(1)/PDBTSO exhibites the hydrogen generation rate of 36.8 mmol·g^(−1)·h^(−1),which is 22.6%higher than that of PDBTSO with 3wt%Pt as co-catalyst.Besides,15-Ni_(7)Fe_(1)/PDBTSO shows good photocatalytic stability,making it an ideal candidate for photocatalytic hydrogen production.XRD,FTIR,TEM and XPS were used to explore the mechanism of photocatalytic hydrogen production performance.The high photocatalytic efficiency and low cost of Ni_(7)Fe_(1)/PDBTSO provide a new idea for the field of photocatalytic hydrogen production.