为解决较低甲醛浓度下纳米催化材料效率低的问题,设计了集甲醛吸附降解催化于一体的功能型复合纳米纤维材料,以提高对甲醛的催化效率.通过水热原位生长法在SiO2纳米纤维上生长ZIF-8纳米颗粒,并采用原位合成法合成水钠锰矿型MnO2制备出MnO2-ZIF-8-SiO2多孔纳米纤维材料.研究ZIF-8纳米颗粒与水钠锰矿型MnO2协同催化降解甲醛性能,结果表明:ZIF-8-SiO2在生长8h时,纤维上的ZIF-8呈现立方体结构且分布均匀为较佳生长时间;此外在浴比为1:1000时,通过动力学分析MnO2-ZIF-8-SiO2多孔纳米纤维材料动力学常数k达1.72×10-1 h-1,并且甲醛降解率可达72.2%,说明纤维材料负载ZIF-8后的MnO2-ZIF-8-SiO2多孔纳米纤维材料对甲醛的降解性能较好.
In order to solve the problem of low efficiency of nano-catalyst materials at low formaldehyde con-centration,a functional composite nano-fiber material was designed to improve the catalytic efficiency of form-aldehyde by combining adsorption and degradation of formaldehyde.ZIF-8 nanoparticles were grown on SiO2 nanofibers by hydrothermal in-situ growth method,MnO2-ZIF-8-SiO2 porous nanofiber material was prepared by in-situ synthesis of manganite type MnO2.A functional composite nanofiber material integrating formalde-hyde adsorption and degradation catalysis were implemented,which has important research value in gas purifi-cation.The synergistic catalytic degradation of formaldehyde by ZIF-8 nanoparticles and manganite MnO2 was studied.The results showed that when ZIF-8-SiO2 grew for 8 h,the best growth time is that ZIF-8 on fiber pres-ents cubic structure and is evenly distributed.In addition,when the bath ratio is 1:1000,the kinetic constant k of MnO2-ZIF-8-SiO2 porous nanofiber material is 1.72×10-1 h-1,and the degradation rate of formaldehyde can reach 72.2%,which indicates that the MnO2-ZIF-8-SiO2 porous nanofiber material loaded with ZIF-8 has better degra-dation performance to formaldehyde.
翟梅青;蒋何鹏;冯林;张如全;胡敏
武汉纺织大学 纺织科学与工程学院,武汉 430200武汉纺织大学 纺织科学与工程学院,武汉 430200||武汉纺织大学 省部共建纺织新材料与先进加工技术国家重点实验室,武汉 430200
轻工业
静电纺丝;水钠锰矿型MnO2;ZIF-8纳米颗粒;纳米纤维材料;甲醛降解
electrospinning;manganite manganese dioxide;ZIF-8 nanoparticles;nanofiber material;formalde-hyde degradation
《纺织工程学报》 2024 (002)
19-27 / 9
国家自然科学基金青年项目(52203278);湖北省科技厅科技计划项目(2022BAD031);湖北省省级大学生创新创业训练计划项目(S202310495011).
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