Solar water evaporation is a significant technique for water purification, desalination, and distillation. The approaches to obtain low-cost, low toxic and reusable material with high solar water evaporation efficiency are essential to solve the problem of drinking water shortage. Herein, we first synthesize TiO₂@TiN hyperbranched nanowires on carbonized wood (CW) for solar water evaporation with a high solar water evaporation rate of 1.5252 kg m⁻² h⁻¹ and a solar thermal conversion efficiency about 94.01% under 1 kW m⁻² simulated solar irradiation. The outstanding solar water evaporation performance can be contributed to the unique design of combining TiO₂@TiN hyperbranched nanowires with CW. TiO₂@TiN hyperbranched nanowires have better solar light absorption and higher specific area to evaporate water than TiN nanoparticles and nanotubes. At the same time, the evaporation enthalpy of water in the hyperbranched nanowires deceases obviously compared with that of normal bulk water. Besides, the hierarchical material possesses good stability and high solar evaporation efficiency both in seawater and in deionized water.

太阳能蒸发是用于水净化，脱盐和蒸馏的一项重要技术。获得低成本，低毒且可重复使用的材料并具有较高的太阳能蒸发效率的方法对于解决饮用水短缺的问题至关重要。在这里，我们首先在碳化木（CW）上合成了TiO ₂ @TiN超支化纳米线用于太阳能蒸发，其太阳能蒸发率高，达到1.5252 kg m ^-2  h ^-1，在1 kW m下的太阳热转换效率约为94.01％。⁻²模拟太阳辐射。出色的太阳能蒸发性能可有助于将TiO ₂ @TiN超支化纳米线与CW结合在一起的独特设计。二氧化钛₂ @TiN超支化纳米线比TiN纳米粒子和纳米管具有更好的太阳光吸收率和更高的比表面积，可以蒸发水。同时，与常规散装水相比，超支化纳米线中水的蒸发焓明显降低。此外，该分层材料在海水和去离子水中均具有良好的稳定性和高的太阳蒸发效率。