Wang Yifan, Chang Qing, Xue Chaorui, Yang Jinlong, Hu Shengliang
Research Group of New Energy Materials and Devices, North University of China, Taiyuan 030051, PR China.
Research Group of New Energy Materials and Devices, North University of China, Taiyuan 030051, PR China; State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, PR China.
J Colloid Interface Sci. 2022 Sep;621:33-40. doi: 10.1016/j.jcis.2022.04.061. Epub 2022 Apr 13.
A purely chemical method is demonstrated to treat a variety of biomass wastes for extracting cellulose nanofibrils (CNFs) with a consistent property. By hydrothermal reaction, carbon dots (CDs) can be easily grafted on the surface of CNFs to act as photo-thermal agents and enable fast water evaporation rate at 2.5 kg mh with about 96.45% solar-to-vapor efficiency under one sun irradiation. This derives from good hydration ability of this system, which lowers the evaporation enthalpy. Moreover, this system not only adsorbs dye contaminants effectively by the formation of hydrogen bonds, but also possesses long-term antifouling solar desalination by means of rationally drilled millimeter-sized channels. Given the sustainable biomass resources and scalable fabrication process, this work offers a promising strategy towards construct low-cost evaporators with the excellent water purification performance.
一种纯化学方法被证明可用于处理各种生物质废料，以提取具有一致性能的纤维素纳米纤维（CNF）。通过水热反应，碳点（CD）可以很容易地接枝到CNF表面，用作光热剂，并在一个太阳辐射下实现2.5 kg m⁻¹ h⁻¹的快速水蒸发速率，太阳能到蒸汽的效率约为96.45%。这源于该系统良好的水合能力，降低了蒸发焓。此外，该系统不仅通过形成氢键有效吸附染料污染物，还通过合理钻出的毫米级通道实现长期防污太阳能海水淡化。鉴于生物质资源的可持续性和可扩展的制造工艺，这项工作为构建具有优异水净化性能的低成本蒸发器提供了一种有前景的策略。
