UiO-66-NH2/MoS2@PUF的制备及其对Cr(Ⅵ)的吸附
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陕西科技大学

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X592

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陕西省重点科技创新团队(2020TD-009);陕西省教育厅青年创新团队建设科研计划项目(21JP014)。


Preparation of UiO-66-NH2/MoS2@PUF for absorption of Cr(Ⅵ)
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1.Shaanxi University of Science &2.Technology;3.amp

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    摘要:

    为了解决金属-有机骨架材料UiO-66-NH2在水中难以回收的问题,同时进一步提高其对Cr(Ⅵ)的吸附效率,通过掺杂MoS2,制备了UiO-66-NH2/MoS2;然后,通过原位生长法将复合材料均匀生长在聚氨酯泡沫(PUF)上,制备出复合材料UiO-66-NH2/MoS2@PUF,将其用于对Cr(Ⅵ)的吸附。采用XRD、SEM、TEM、TGA和BET对UIO-66-NH2/MoS2@PUF进行了表征。结果表明,UiO-66-NH2/MoS2均匀生长在PUF表面上,且负载率高达28%。当pH=4时,Cr(Ⅵ)去除率可达89%,经5次循环吸附后,复合材料对Cr(Ⅵ)的去除率仍保持在83%,说明UiO-66-NH2/MoS2@PUF具有良好的循环利用性。测定了吸附Cr(Ⅵ)之后溶液中的锆浓度,Zr(Ⅳ)的浓度为0.0785 mg/L,说明吸附过程中UiO-66-NH2/MoS2@PUF具有出色的化学稳定性。准二级动力学模型和Langmuir模型可以较好地描述UiO-66-NH2/MoS2@PUF对Cr(Ⅵ)的化学吸附过程。

    Abstract:

    In order to solve the problem of difficult recovery of metal-organic skeleton material UiO-66 in water and further improve the adsorption efficiency of UiO-66 to Cr(Ⅵ), molybdenum disulfide (MoS2) was doped to prepare UiO-66-NH2/MoS2. Then, the composite material was uniformly grown on polyurethane foam (PUF) by in-situ growth method to prepare the composite material UiO-66-NH2/MoS2@PUF. UiO-66-NH2/MoS2@PUF were characterized by XRD, SEM, TEM, TGA and BET. The results showed that UiO-66-NH2/MoS2 was uniformly loaded on the surface of PUF and the loading rate was up to 28%. The application experiment results showed that when pH was 4, the removal rate of Cr(Ⅵ) reached to 89%. After 5 cycles of adsorption, the removal rate of UiO-66-NH2/MoS2@PUF to Cr(Ⅵ) still was 83%, which indicated that UiO-66-NH2/MoS2@PUF had good recyclability. The concentration of Zr(Ⅳ) in the residual solution after Cr(Ⅵ) adsorption was analyzed. The concentration of Zr(Ⅳ) was 0.0785 mg/L, which indicated that the leakage of Zr(Ⅳ) during the adsorption process can be negligible and proved that UiO-66-NH2/MoS2@PUF had excellent chemical stability. The results showed that quasi-second-order kinetic model and Langmuir model can describe the adsorption process of UiO-66-NH2/MoS2@PUF to Cr(Ⅵ) well.

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任龙芳,高晓东,张馨月,强涛涛. UiO-66-NH2/MoS2@PUF的制备及其对Cr(Ⅵ)的吸附[J].精细化工,2023,40(2):

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  • 收稿日期:2022-05-20
  • 最后修改日期:2022-08-14
  • 录用日期:2022-08-15
  • 在线发布日期: 2023-01-17
  • 出版日期: 2022-09-30
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