Trinh Ba Thong, Cho Hanjun, Lee Deunchan, Omelianovych Oleksii, Kim Taehun, Nguyen Sy Khiem, Choi Ho-Suk, Kim Hongki, Yoon Ilsun
Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea.
Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea.
Nanomaterials (Basel). 2023 Mar 10;13(6):1003. doi: 10.3390/nano13061003.
Solar-to-steam (STS) generation based on plasmonic materials has attracted significant attention as a green method for producing fresh water. Herein, a simple in situ method is introduced to fabricate Au nanoparticles (AuNPs) on cellulose filter papers as dual-functional substrates for STS generation and surface-enhanced Raman spectroscopy (SERS) sensing. The substrates exhibit 90% of broadband solar absorption between 350 and 1800 nm and achieve an evaporation rate of 0.96 kg·m·h under 1-sun illumination, room temperature of 20 °C, and relative humidity of 40%. The STS generation of the substrate is stable during 30 h continuous operation. Enriched SERS hotspots between AuNPs endow the substrates with the ability to detect chemical contamination in water with ppb limits of detection for rhodamine 6G dye and melamine. To demonstrate dual-functional properties, the contaminated water was analyzed with SERS and purified by STS. The purified water was then analyzed with SERS to confirm its purity. The developed substrate can be an improved and suitable candidate for fresh water production and qualification.
基于等离子体材料的太阳能-蒸汽（STS）产生作为一种生产淡水的绿色方法已引起广泛关注。在此，介绍一种简单的原位方法，在纤维素滤纸上制备金纳米颗粒（AuNP）作为用于STS产生和表面增强拉曼光谱（SERS）传感的双功能基底。这些基底在350至1800 nm之间表现出90%的宽带太阳能吸收，在1个太阳光照、20℃室温及40%相对湿度条件下实现0.96 kg·m⁻²·h的蒸发速率。该基底的STS产生在30小时连续运行期间保持稳定。AuNP之间富集的SERS热点使基底具备检测水中化学污染物的能力，对罗丹明6G染料和三聚氰胺的检测限达ppb级别。为证明其双功能特性，先用SERS分析受污染的水，再通过STS进行净化。然后用SERS分析净化后的水以确认其纯度。所开发的基底可为淡水生产和鉴定提供一种改进的合适候选方案。
