工业水处理 ›› 2024, Vol. 44 ›› Issue (3): 64-73. doi: 10.19965/j.cnki.iwt.2023-0209

• 试验研究 • 上一篇    下一篇

SiO2/g-C3N4复合材料的3D打印制备及对染料废水的处理性能

赵文璞1(), 赵晓东1, 季惠明1, 马元良2, 马生花2, 沈铸睿3()   

  1. 1. 天津大学材料科学与工程学院, 先进陶瓷与加工技术教育部重点实验室, 天津 300350
    2. 青海民族大学物理与电子信息工程学院, 青海 西宁 810007
    3. 南开大学材料科学与工程学院, 天津 300350
  • 收稿日期:2023-12-25 出版日期:2024-03-20 发布日期:2024-03-21
  • 作者简介:

    赵文璞(1998— ),硕士。E-mail:

    沈铸睿,研究员,博士生导师。E-mail:

  • 基金资助:
    国家自然科学基金面上项目(22172080); 青海省应用(基础)研究项目(2021-ZJ-702)

Preparation of SiO2/g-C3N4 composite material by 3D printing and its treatment properties for wastewater containing dyes

Wenpu ZHAO1(), Xiaodong ZHAO1, Huiming JI1, Yuanliang MA2, Shenghua MA2, Zhurui SHEN3()   

  1. 1. Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education,School Materials Science and Engineering,Tianjin University,Tianjin 300350,China
    2. College of Physics and Electronic Information Engineering,Qinghai Nationality University,Xining 810007,China
    3. School of Materials Science and Engineering,Nankai University,Tianjin 300350,China
  • Received:2023-12-25 Online:2024-03-20 Published:2024-03-21

摘要:

使用直写型3D打印的方式制备了高比表面积与多孔结构的SiO2/g-C3N4复合气凝胶材料,并对材料的微观形貌、多孔结构进行了表征,测试了其对于模拟溶液中高浓度罗丹明B(RhB)的吸附及催化降解性能。研究结果表明,3D打印SiO2块体气凝胶比表面积达482.1 m2/g,具备孔隙体积为1.195 cm3/g的纳米多孔结构,对RhB具有好的吸附性能。经g-C3N4修饰所得的SiO2/g-C3N4复合气凝胶材料孔结构与比表面积变化不大,除仍保持较高的吸附性能外,在紫外光照下对RhB(100 mg/L)的去除率可达99%以上。经5次循环测试后SiO2/g-C3N4复合气凝胶对RhB的去除率仍达92.98%,相比之下3D打印SiO2气凝胶仅为55.75%。机理分析表明,复合材料中的g-C3N4可吸收光能并生成光生电子空穴对,其与H2O和O2作用产生氧化活性物质超氧自由基,最终均参与光催化氧化还原反应中对RhB大分子的催化氧化降解。3D打印结构具有的高比表面积实现了催化剂与RhB大分子较大的反应接触面积,提高了复合材料的光催化降解效率及循环稳定性。

关键词: 3D打印, SiO2/g-C3N4复合气凝胶, 吸附, 降解

Abstract:

SiO2/g-C3N4 composite aerogel material with high specific surface area and porous structure was prepared by direct ink writing 3D printing. The micro morphology and porous structure of the material were characterized,and its adsorption and catalytic degradation properties for high concentration Rhodamine B(RhB) in wastewater were tested. The research results showed that the 3D-printed SiO2 aerogel has a specific surface area of 482.1 m2/g,a nano porous structure with a pore volume of 1.195 cm3/g,and a good adsorption performance for RhB. The porous structure of SiO2/g-C3N4 composite aerogel prepared by modifying with g-C3N4 had little change and maintained high adsorption performance,and the removal rate of RhB(100 mg/L) by 3D-printed composite under UV could reach more than 99%. After five cycles of testing,the removal rate of RhB by SiO2/g-C3N4 composite aerogel was still 92.98%,compared with 55.75% for 3D-printed SiO2 aerogel. According to the mechanism analysis,g-C3N4 in the composite could absorb light energy and generate photogenerated electron-hole pairs,the electron-hole pairs could react with H2O and O2 to produce oxidizing active substances superoxide radicals,and finally participated in the photocatalytic oxidation and reduction reaction to catalyze the degradation of RhB macromolecules. The high specific surface area of the 3D printing structure realized the large reaction contact area between the catalyst and RhB,and improved the photocatalytic degradation efficiency and cycle stability of the composite.

Key words: 3D printing, SiO2/g-C3N4 composite aerogel, adsorption, degradation

中图分类号: