Photocatalytic oxidation desulfurization by iron phthalocyanine supported on Ti-MCM-41

doi:10.11949/j.issn.0438-1157.20150863

Abstract

Abstract:

Titanium-silicium molecular sieve Ti-MCM-41 was synthesized and the iron phthalocyanines(FePcs) with different substituent groups were loaded onto the modified Ti-MCM-41 by covalent bond to prepare FePcs(R)/Ti-MCM-41 catalyst. FePcs(R)/Ti-MCM-41 were characterized by FT-IR, XRD, SEM, BET and UV-Vis DRS. Dibenzothiophene(DBT) was photo-oxidized with FePcs(R)/Ti-MCM-41 as photocatalysts, air as oxidant and CPL-CTAB ionic liquid as extraction agent in the irradiation of visible light under room temperature and atmosphere. The optimal reaction conditions were explored by simple variable method. The results showed that FePc(NH₂)/Ti-MCM-41 exhibited a better photocatalytic activity and the removal ratio of DBT was up to 95.6% under the optimal reaction conditions. The catalytic performance of FePc(NH₂)/Ti-MCM-41 did not decrease obviously after reusing 5 runs of oxidation.

Key words: photocatalytic oxidation, dibenzothiophene, iron phthalocyanine, Ti-MCM-41

摘要：

合成了钛硅分子筛Ti-MCM-41,通过对Ti-MCM-41改性以共价键将带有不同取代基的酞菁铁负载于Ti-MCM-41上制备出Ti-MCM-41负载酞菁铁催化剂,并利用红外光谱、X射线衍射、扫描电镜以及BET氮气吸附-脱附等温线以及紫外-可见吸收光谱对合成的催化剂进行表征。在常温常压下,以Ti-MCM-41负载酞菁铁为光催化剂,空气为氧化剂,己内酰胺四丁基溴化铵离子液体为萃取剂,可见光下催化氧化二苯并噻吩(DBT),采用单一变量法探索该体系的最佳反应条件。结果表明,Ti-MCM-41负载氨基酞菁铁具有较好的光催化活性,且在最佳工艺条件下,DBT的脱除率最高可达95.6%。催化剂重复使用5次后,催化活性没有明显下降。

关键词: 光催化氧化, 二苯并噻吩, 酞菁铁, Ti-MCM-41

CLC Number:

O623.83

ZHANG Juan, HU Yanhui, REN Tengjie, LI Weikang, ZHAO Dishun. Photocatalytic oxidation desulfurization by iron phthalocyanine supported on Ti-MCM-41[J]. CIESC Journal, 2015, 66(9): 3437-3443.

张娟, 胡颜荟, 任腾杰, 李未康, 赵地顺. Ti-MCM-41负载酞菁铁光催化氧化脱硫[J]. 化工学报, 2015, 66(9): 3437-3443.

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