Jin Duan,Zhe Liu,Gege Hang,Yanan Wang,Xiuchen Wang
Harvesting energy from the ubiquitous environmental water vapor cycle is a promising pathway for sustainable power generation. Human skin releases ≈40–340 W of thermal energy per hour through perspiration, and even converting 1% could power most low-energy wearable devices. However, achieving stable vapor capture, directional transport, and efficient charge separation in the skin microenvironment remains a key challenge for hygrothermal energy conversion. Inspired by plant transpiration, a bioinspired moisture-guiding heterogeneous interface is constructed to fabricate a Janus Alk-MXene PVA@Alk-PVA-PVDF fibrous membrane with hydrophilic adsorption, ion conduction, and evaporation-driven traction, enabling directional vapor transport and efficient charge separation. With a thickness of 0.084 mm, the membrane combines flexibility, breathability, and excellent integration compatibility for wearable applications. A 1 cm 2 Janus MEG delivers a rapid response of 1.07 s, 1.18 V output, ≈935.2 µA cm −2 short-circuit current density, and ≈1103.5 µW cm −2 power density, retaining ≈0.87 V after one month and demonstrating excellent moisture sensitivity with stable voltage output. Furthermore, a modular three-unit series–parallel configuration achieves ≈2.32 V and ≈46.4 mA under high humidity, providing a sustainable strategy for self-powered wearable electronics in medical monitoring and next-generation human–machine interaction.
Zezhou Zhang,Wansheng Li,Boyu Zhao,Xiuying Yang,Chennan Zhao,Wenyi Wang,Xiangdong Yang,Ao Shen,Meiqi Ye
Self-assembled composite membranes are increasingly acknowledged for their potential in wastewater treatment due to their superior selectivity, high operational efficiency, and environmental sustainability. Nonetheless, challenges such as inadequate removal efficiencies for low molecular weight dyes and significant membrane fouling restrict their broader industrial application. To address these challenges, a structurally stable composite membrane of sodium lignosulfonate carbon nanotubes/alkalized MXene (SLS-CNT/alk-MXene) has been engineered. This membrane employs a polyethersulfone substrate pretreated with dopamine for uniform nanoparticle assembly through a layer-by-layer self-assembly technique. The manufacturing process includes hydrophilic modification of carbon nanotubes with lignosulfonate, followed by alkalization of MXene using sodium hydroxide. Performance evaluation of the M2 composite membrane, with a content ratio of SLS-CNT to alk-MXene of 4:2 by weight, revealed outstanding membrane properties. It achieved high selective permeability, with over 99 % retention efficiency for Methyl Blue and Congo Red, and a permeation flux of 51.6 L m -2 h −1 bar −1 . This membrane efficiently degraded various organic dyes within 1h, including Methyl Orange, Methylene Blue, Malachite Green, and Rhodamine B, and thanks to the integration of electrocatalysis with membrane separation, while maintaining a low membrane resistance of only 813 Ω. After environmentally sustainable testing, the membrane displayed excellent stability and 80 % recovery capacity, presenting a novel approach and design blueprint for enhancing clean water resources and environmental protection.
危险品化学品经营许可证（带存储）