纳米TiN/h-BN纤维复合气凝胶的制备及光热海水淡化性能  

Nano TiN/h-BN Fiber Composite Photothermal Aerogels for Boosting Solar-driven Seawater Desalination

作　　者：姜杭 谷昊辉 梁峰[1] 何冈骏 田宇 JIANG Hang;GU Haohui;LIANG Feng;HE Gangjun;TIAN Yu(State Key Laboratory of Refractories and Metallurgy,Department of Materials,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学材料学部,省部共建耐火材料与冶金国家重点实验室,武汉430081

出　　处：《高等学校化学学报》2024年第12期79-87,共9页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:52272021,52072274,52232002,U23A20559)资助.

摘　　要：以三聚氰胺(C_(3)H_(6)N_(6))、硼酸(H_(3)BO_(3))、乙醇(C_(2)H_(5)OH)、尿素[CO(NH_(2))_(2)]和四氯化钛(TiCl_(4))为原料,通过真空浸渍法和原位反应制备了纳米氮化钛/六方氮化硼纤维复合气凝胶新型光热转换材料(TiN/h-BN),并用于太阳能海水淡化.研究了复合气凝胶的光热蒸发性能以及对海水中阳离子的去除效果.结果表明,纳米氮化钛颗粒原位生长在氮化硼纤维表面,显著提高了气凝胶的光吸收性、水润湿性和光热转换性能.在模拟1个太阳光(1 kW/m^(2))照射下,复合气凝胶在100 s内表面温度上升至平衡温度66.8℃,对光辐射具有较高的吸收和转换能力,其水蒸发速率为2.88 kg·m^(-2)·h^(-1),蒸发效率为93%,并展现出优异的循环使用性能,对人工海水中阳离子的去除率高达99.9%,在海水淡化领域具有良好的应用前景.In this paper,a novel nano titanium nitride/hexagonal boron nitride(TiN/h-BN)fiber composite photothermal aerogel was synthesized using melamine(C_(3)H_(6)N_(6)),boric acid(H_(3)BO_(3)),ethanol(C_(2)H_(5)OH),urea[CO(NH_(2))_(2)]and titanium tetrachloride(TiCl_(4))as raw materials,through vacuum impregnation and in situ reaction methods.The photothermal conversion and seawater desalination properties of the composite photothermal aerogel were evaluated.The results indicate that titanium nitride nanoparticles were in situ grown on the surface of boron nitride fibers,which significantly improved the light absorption,water wettability and photothermal conversion properties of the aerogel.Under artificial sunlight illumination(1 kW/m^(2)),the surface temperature of the composite aerogel rose to 66.8℃ equilibrium temperature within 100 s,demonstrating high optical absorption and efficient solar-to-thermal conversion.As a result,the composite photothermal aerogel presented a water evaporation rate of 2.88 kg·m^(‒2)·h^(‒1)with an evaporation efficiency of 93%.Additionally,the TiN/h-BN composite photothermal aerogel possessed excellent cycle stability with a removal rate of cation in artificial seawater as high as 99.9%,indicating great potential for application in seawater desalination.

关 键 词：氮化钛 氮化硼气凝胶 光热转换 海水淡化 

分 类 号：O644[理学—物理化学] O648[理学—化学]