Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials (Hubei University), Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, School of Materials Science and Engineering, Hubei University, Wuhan 430062, P. R. China.
Institute of Quantum Optics and Quantum Information, School of Science, Xi'an Jiaotong University (XJTU), Xi'an 710049, P. R. China.
ACS Appl Mater Interfaces. 2023 Apr 5;15(13):16607-16620. doi: 10.1021/acsami.2c20207. Epub 2023 Mar 22.
Biomass-based photothermal conversion is of great importance for solar energy utilization toward carbon neutrality. Herein, a hybrid solar evaporator is innovatively designed via UV-induced printing of pyrolyzed Kudzu biochar on hydrophilic cotton fabric (KB@CF) to integrate all parameters in a single evaporator, such as solar evaporation, salt collection, waste heat recovery for thermoelectricity, sieving oil emulsions, and water disinfection from microorganisms. The UV-induced printed fabric demonstrates stronger material adhesion as compared to the conventional dip-dry technique. The hybrid solar evaporator gives an enhanced evaporation rate (2.32 kg/m h), and the complementary waste heat recovery system generates maximum open-circuit voltage ( ∼ 143.9 mV) and solar to vapor conversion efficiency (92%), excluding heat losses under one sun illumination. More importantly, 99.98% of photothermal-induced bacterial killing efficiency was achieved within 20 min under 1 kW m using the hyperthermia effect of Kudzu biochar. Furthermore, numerical heat-transfer simulations were performed successfully to analyze the enhanced interfacial heat accumulation (75.3 °C) and heat flux distribution of the thermoelectric generators under one sun. We firmly believe that the safe use of bio-polluted invasive species in hybrid solar-driven evaporation systems eases the environmental pressure toward carbon neutrality.
基于生物质的光热转换对于实现太阳能利用向碳中和目标的转变具有重要意义。在此，我们通过在亲水性棉织物（KB@CF）上进行紫外线诱导的热解葛根生物炭印刷，创新性地设计了一种混合太阳能蒸发器，将太阳能蒸发、盐收集、废热回收用于热电、过滤油乳液以及微生物水消毒等所有参数集成在单个蒸发器中。与传统的浸泡干燥技术相比，紫外线诱导印刷织物具有更强的材料附着力。该混合太阳能蒸发器的蒸发速率得到显著提高（2.32 kg/m h），并且补充的废热回收系统产生最大开路电压（∼143.9 mV）和太阳能到蒸汽的转换效率（92%），在 1 个太阳光照下，排除了热损失。更重要的是，在 1 kW m 的超高温作用下，葛根生物炭的热效应在 20 分钟内实现了 99.98%的光热诱导杀菌效率。此外，我们还成功地进行了数值传热模拟，以分析在一个太阳光照下，界面热积累（75.3°C）和热电发生器的热通量分布的增强。我们坚信，在混合太阳能驱动的蒸发系统中安全使用生物污染的入侵物种可以缓解向碳中和目标转变的环境压力。
