摘要
通过静电纺丝技术首先制备了NiCl2/PVDF-PVA复合高分子纳米纤维,通过原位还原法得到了PVDF-PVA复合纳米纤维负载NiB的非晶态合金催化剂,并把该催化剂用于 NaBH4水解制氢反应。 SEM 表征表明, NiCl2/PVDF-PVA复合纳米纤维具有纤细微观纳米形貌,纤维直径均匀,介于50~200 nm。 TG分析表明, NiCl2/PVDF-PVA纳米纤维可以稳定到大约390℃,超过该温度纳米纤维开始发生热解,说明该纳米纤维催化剂载体具有适于硼氢化钠水解反应的热稳定性。接触角测试表明,PVA共纺显著提高了PVDF纳米纤维的亲水性,有利于NaBH4和水分子在催化剂表面上的接触反应。水解制氢实验表明,PVA共混静电纺丝法得到的NiB /PVDF-PVA较NiB/PVDF催化剂催化活性显著提高,该催化剂具有较好的应用前景。
NiCl2/PVDF-PVA composite nanofibers were prepared via electrospinning technique, and then NiB/PVDF-PVA nanofiber catalyst can be prepared by in-situ reduction. This catalyst was applied in hydro-gen production from hydrolysis of NaBH4 . SEM characterization showed that the well-defined nanoscaled mi-crostructure can be obtained for NiB/PVDF-PVA composite nanofiber,which possesses uniform nanofiber diameter （50~200 nm） . TG analysis revealed that NiB/PVDF-PVA nanofiber catalyst can be stable up to approximately 390 ℃ which is suitable to be used in hydrolysis of NaBH4 . The measurement of water con-tact angle indicated that the wettability of PVDF-PVA nanofiber is better than that of pure PVDF nanofiber due to hydrophilic PVA doping. The results showed that the catalytic activity of NiB/PVDF-PVA composite catalyst can be remarkably improved through the doping of hydrophilic PVA compared with NiB/PVDF cat-alysts. Hence,NiB/PVDF-PVA nanofiber catalyst has an extensive application prospect.
出处
《应用化工》
CAS
CSCD
北大核心
2015年第9期1602-1606,共5页
Applied Chemical Industry
基金
国家自然科学青年基金资助项目(21201096)
辽宁省教育厅资助项目(L2010242)
