Green synthesis of ice-templated lotus starch–bentonite cryogels for sustainable and energy-efficient VOC capture
Huarong Liu, Hong Liu, Ning An, Kui Yang, Zhongwei Liu
TL;DR
A sustainable, low-energy method creates a material that efficiently captures volatile organic compounds with high selectivity and regeneration efficiency.
Contribution
A green ice-templating method produces a lotus starch–bentonite cryogel with enhanced VOC capture and regeneration properties.
Findings
The material has a specific surface area of 71.3 m² g⁻¹ and high toluene adsorption capacity (53.8 mg g⁻¹).
It shows polarity-driven selectivity for chlorobenzene (54.3 mg g⁻¹) over toluene and benzene.
The material retains 78% capacity after 10 regeneration cycles at 110 °C.
Abstract
Sustainable adsorbents for industrial volatile organic compound (VOC) control are urgently needed to balance efficiency and operational economy. This report describes an eco-friendly strategy for fabricating hierarchical porous bentonite (Bt) via green ice-templating using lotus root starch as a biomass crosslinker. The optimized material exhibits a well-defined lamellar-bridging network with a specific surface area of 71.3 m2 g−1 and a pore volume of 0.118 cm3 g−1.This adsorbent exhibits high toluene capacity (53.8 mg g−1; 4.7× raw Bt) with polarity-driven selectivity for chlorobenzene (54.3 mg g−1) > toluene > benzene (46.2 mg g−1), facilitated by multiscale transport and cation-polar molecule interactions. Notably, the material enables humidity-resistant operation and low-energy regeneration at 110 °C while retaining 78% capacity after 10 cycles. With its natural composition,…
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Taxonomy
TopicsAdsorption and Cooling Systems · Adsorption and biosorption for pollutant removal · Carbon Dioxide Capture Technologies