3D Tea-Residue Microcrystalline Cellulose Aerogel with Aligned Channels for Solar-Driven Interfacial Evaporation Co-generation,ACS Applied Materials & Interfaces

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3D Tea-Residue Microcrystalline Cellulose Aerogel with Aligned Channels for Solar-Driven Interfacial Evaporation Co-generation
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-10-27 , DOI: 10.1021/acsami.3c12170
Jiyan Li ₁ , Meichen Liu ₁ , Wenwen Luo ₁ , Guoyu Xing ₁ , Wenzhe Yang ₁ , Hanxue Sun ₁ , Rui Jiao ₁ , Junping Zhang ₂ , An Li ₁

Affiliation

Solar-driven interfacial evaporation co-generation (SIE-CG) technology is of great significance in solving the problem of water and energy shortage. Herein, we report the ionic liquid-assisted alignment of waste biomass tea residue-based microcrystalline cellulose for aerogels (abbreviated as TPPA-5) with aligned channels for solar-driven interfacial evaporation co-generation. In the ionic liquid, strong H-bonding is formed between the pyranoid rings of cellulose combined with the slow freezing technique, resulting in the microcrystalline cellulose being reoriented, which allowed TPPA-5 to form abundant aligned channels after solvent replacement and freeze-drying. These aligned channels enable the brine to form a localized circulating flow, which is conducive to the improvement of the TPPA’s evaporation rate and salt resistance. The salinity gradient is naturally formed in the channel of TPPA, which enables TPPA-5 to show excellent power generation performance. The evaporation rate of TPPA-5 can reach 3.39 kg m^–2 h^–1 under 1 kW m^–2. With methanol as a highly polar proton solvent, the maximum output voltage obtained was 67.534 mV due to the overlapping electric double-layer effect formed by hydrogen protons on the TPPA surface, and the energy utilization efficiency is 95.95%. Moreover, TPPA-5 can purify pesticide-containing wastewater, which has the advantages of being recyclable and environmentally friendly, showing potential application value in the field of seawater desalination and steam co-generation.

中文翻译：

具有对齐通道的 3D 茶渣微晶纤维素气凝胶，用于太阳能驱动的界面蒸发热电联产

太阳能界面蒸发热电联产（SIE-CG）技术对于解决水和能源短缺问题具有重要意义。在此，我们报告了用于气凝胶（缩写为TPPA-5）的离子液体辅助排列的废生物质茶渣基微晶纤维素，以及用于太阳能驱动界面蒸发联产的排列通道。在离子液体中，结合慢速冷冻技术，纤维素的吡喃环之间形成强氢键，导致微晶纤维素重新取向，使得TPPA-5在溶剂置换和冷冻干燥后形成丰富的排列通道。这些排列的通道使盐水形成局部循环流，有利于TPPA蒸发速率和抗盐性的提高。TPPA通道内自然形成的盐度梯度，使得TPPA-5表现出优异的发电性能。1 kW m ^–2下TPPA-5的蒸发速率可达3.39 kg m ^–2 h ^–1。以甲醇作为高极性质子溶剂，由于氢质子在TPPA表面形成的重叠双电层效应，获得的最大输出电压为67.534 mV，能量利用率为95.95%。而且TPPA-5可以净化含农药废水，具有可回收、环境友好的优点，在海水淡化和蒸汽热电联产领域显示出潜在的应用价值。

更新日期：2023-10-27

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