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摘要
以1,3,6,8-四溴芘和四-(4-溴苯)乙烯作为单体,分别与2,2′:5′,2″-三噻吩通过Suzuki-Miyaura偶联聚合反应制备了2种共轭微孔聚合物Py-LTTP和TPE-LTTP,采用傅里叶变换红外光谱仪、超高分辨率场发射扫描电子显微镜、热重分析仪、X射线衍射仪、紫外-可见分光光度计、比表面积及孔径分析仪表征2种聚合物的官能团结构、微观形貌、热稳定性、结晶性、光吸收能力、比表面积及孔径分布,并研究了聚合物的光催化制氢性能。结果表明:Py-LTTP呈纳米纤维与纳米片交织的棒状形貌,具有良好的热稳定性、非结晶形态、介微孔结构及大比表面积,吸光度可达0.60～0.84;TPE-LTTP具有良好的热稳定性,其吸光度和比表面积均小于Py-LTTP。Py-LTTP具备更好的光催化制氢性能,在没有Pt助催化剂的条件下,在紫外-可见光照射(波长>300nm)下反应3h光催化制氢速率达到9.99mmol/(h·g)。Py-LTTP较TPE-LTTP具有更高的光催化制氢速率和更好的活性位点。
Abstract
Two conjugated microporous polymers,Py-LTTP and TPE-LTTP,were prepared by Suzuki-Miyaura coupling polymerization of 1,3,6,8-tetrabromopyrene and tetra-(4-bromophenyl) ethylene with 2,2′:5′,2″-trithiophene,respectively.The functional group structure,microstructure,thermal stability,crystallinity,light absorption capacity,specific surface area and pore size distribution were investigated by Fourier transform infrared spectroscopy,ultra-high resolution field emission scanning electron microscopy,thermogravimetric analysis,X-ray diffractometer,UV-visible spectrophotometer,and specific surface area and pore size analyzer.Their photocatalytic hydrogen production performance was studied.The results indicated that Py-LTTP had a rod-shaped morphology interwoven with nanofibers and nanosheets,featuring excellent thermal stability,amorphous morphology,absorbance ranging from 0.60 to 0.84,mesoporous-microporous structure and high specific surface area.TPE-LTTP had good thermal stability,and its absorbance and specific surface area were less than Py-LTTP.Py-LTTP had better photocatalytic hydrogen production performance.Without Pt co-catalyst,the photocatalytic hydrogen production rate of 9.99mmol/(h·g) was obtained under UV visible light irradiation (λ>300nm).Py-LTTP had higher photocatalytic hydrogen production rate and more abundant active sites than TPE-LTTP.
关键词
1,3,6,8-四溴芘
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四-(4-溴苯)乙烯
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2,2′:5′,2″-三噻吩
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光催化制氢
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有机共轭微孔聚合物
Key words
1,3,6,8-tetrabromopyrene
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tetra-(4-bromophenyl) ethylene,2,2′:5′
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2″-trithiophene
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photocatalytic hydrogen production
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organic conjugated microporous polymers
噻吩基共轭微孔聚合物的合成及其光催化制氢性能研究[J].
化工新型材料, 2026, 54(7): 135-140 DOI:10.19817/j.cnki.issn1006-3536.2026.07.015
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基金资助
江汉大学研究生创新基金(KYCXJJ202420);湖北省大学生创新创业项目(S202411072099);江汉大学校级科研项目(2024zd046,2024yb110)
