Freeze Granulation of Nanoporous UiO-66 Nanoparticles for Capture of Volatile Organic Compounds,ACS Applied Nano Materials

当前位置： X-MOL 学术 › ACS Appl. Nano Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Freeze Granulation of Nanoporous UiO-66 Nanoparticles for Capture of Volatile Organic Compounds
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2021-08-23 , DOI: 10.1021/acsanm.1c01524
Van Nhieu Le ₁ , Daekeun Kim ₂ , Jinsoo Kim ₁ , Mohd Roslee Othman ₃

Affiliation

Nanoporous UiO-66 spherical beads prepared by using PVA binder successfully connected UiO-66 nanoparticles together into granular beads with improved mechanical strength for toluene capture. This was achieved without affecting the crystalline nature and micropore structures of the material. The regular octahedron of the UiO-66 individual nanoparticle remained intact, and the micropore size did not change with increasing PVA addition without which the nanoporous UiO-66 could not granulate into beads. However, PVA bound the nanoparticles together to form compact and cohesive network clusters that reduced the BET surface area and total pore volume. This consequently lowered the toluene adsorption efficacy slightly due to the premature breakthrough that limited the toluene molecular exposure into the micropores of the individual UiO-66 nanoparticles.

中文翻译：

用于捕获挥发性有机化合物的纳米多孔 UiO-66 纳米颗粒的冷冻造粒

使用 PVA 粘合剂制备的纳米多孔 UiO-66 球形珠成功地将 UiO-66 纳米颗粒连接在一起形成颗粒状珠，提高了机械强度以捕获甲苯。这是在不影响材料的结晶性质和微孔结构的情况下实现的。UiO-66 单个纳米颗粒的规则八面体保持完整，微孔尺寸不随 PVA 添加量的增加而变化，否则纳米多孔 UiO-66 无法粒化成珠粒。然而，PVA 将纳米颗粒结合在一起形成紧密且有凝聚力的网络簇，从而减少了 BET 表面积和总孔体积。由于过早突破限制了甲苯分子暴露到单个 UiO-66 纳米粒子的微孔中，这因此略微降低了甲苯吸附效率。

更新日期：2021-09-24

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11