Acta Chimica Sinica ›› 2023, Vol. 81 ›› Issue (6): 604-612.DOI: 10.6023/A23020049 Previous Articles     Next Articles



王凯晴a, 袁硕a, 徐王东a, 霍丹a,b, 杨秋林a,*(), 侯庆喜a,*(), 于得海a,c   

  1. a 天津市制浆造纸重点实验室 天津科技大学轻工科学与工程学院 天津 300457
    b 山东华泰纸业股份有限公司 东营 257335
    c 生物基材料与绿色造纸国家重点实验室 齐鲁工业大学(山东省科学院) 济南 250353
  • 投稿日期:2023-03-06 发布日期:2023-05-12
  • 基金资助:
    国家自然科学基金(22178273); 天津制浆造纸重点实验室(天津科技大学)基金(202201)

Preparation and Adsorption Properties of ZIF-8@B-CNF Composite Aerogel

Kaiqing Wanga, Shuo Yuana, Wangdong Xua, Dan Huoa,b, Qiulin Yanga(), Qingxi Houa(), Dehai Yua,c   

  1. a Tianjin Key Laboratory of Pulp and Paper, College of Light Industry Science and Engineering, Tianjin University of Science & Technology, Tianjin 300457, China
    b Shandong Huatai Paper Co., Ltd., Dongying 257335, China
    c State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
  • Received:2023-03-06 Published:2023-05-12
  • Contact: *E-mail:;
  • Supported by:
    National Natural Science Foundation of China(22178273); Foundation of Tianjin Key Laboratory of Pulp & Paper (Tianjin University of Science & Technology)(202201)

Based on the principle of “fiber first”, cellulose nanofibrils (CNF) and metal-organic framework (MOF) are utilized to prepare composite material. The CNF with high dispersibility was prepared via MgCl2/succinic acid hydrolysis, sodium chlorite oxidation and high-pressure homogenization, then it was chemically cross-linked with 1,2,3,4-butane tetracarboxylic acid (BTCA) and freeze-dried in a mold for 4 h to obtain the aerogel. The aerogel was fully esterified at 170 ℃ for 2~3 min to obtain aerogel B-CNF, then Zn2+ and 2-methylimidazole were synthesized in-situ on its surface, finally, ZIF-8@B-CNF composite aerogel was successfully prepared. After that, the composite aerogel was used for the adsorption of methylene blue (MB), and the effects of adsorption conditions including adsorption time, MB concentration, pH values of the solution were discussed. The ZIF-8@B-CNF composite aerogel was characterized by SEM (scanning electron microscope), XRD (X-ray diffraction), FT-IR (Fourier transform infrared spectroscopy), XPS (X-ray photoelectron spectroscopy), BET (Brunner-Emmet-Teller), etc., and the adsorption behavior and adsorption mechanism of MB were researched. The results showed that the ZIF-8@B-CNF composite aerogel had the advantages of low density and high surface area. When the loading capacity of ZIF-8 came up to 50%, the density of the ZIF-8@B-CNF was as low as less than 0.1 g•cm−3, and its surface area were increased by 14.5 times compared with that of the CNF aerogel. The ZIF-8@B-CNF composite aerogel showed excellent adsorption capacity for the MB, its theoretical maximum adsorption capacity was as high as 352.59 mg•g−1 based on the Langmuir adsorption model, demonstrating that the composite aerogel had excellent adsorption capacity. The adsorption process was in accordance with the quasi-second-order kinetic model, which belonged to the chemisorption. In addition, the adsorption behavior of MB on the composite aerogel mainly depended on the effects of electrostatic interaction, π-π stacking and hydrogen bonding.

Key words: metal-organic framework, cellulose nanofibril, composite aerogel, adsorption property