Corncob is an extremely cheap and easily available biomass with excellent hydrophilicity. Crisscross pores of corncob provide channels for efficient water transport. An efficient solar evaporator is prepared by coating carbon black (CB) film on corncob. The light absorption of corncob coated with CB film is significantly enhanced, and the absorptance is more than 94% in solar waveband. The evaporation rate of CB-coated corncob is 1.425 kg/m2h, 78.1% higher than that of uncoated corncob. The height of corncob above water has an important influence on evaporation performance. The maximum evaporation rate is 1.88 kg/m2h when the corncob is 2 cm above water. Compared with 0 cm above water, the evaporation rate of corncob with 1, 2, and 3 cm above water increases by 13.7%, 32%, and 24%, respectively. The effect of light intensity on evaporation performance is studied. Although increasing the light intensity can achieve a higher evaporation rate, it will increase the complexity and cost of the solar evaporation device. With the advantages of rich raw materials and low cost, the corncob-based interfacial evaporator can reuse the crop waste. More importantly, the preparation method is very simple, and the whole process does not need to use complex mechanical equipment. This study will boost the applications of biomass materials in the field of solar vapor generation.

中文翻译：

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用于高效太阳能蒸汽发电的玉米芯蒸发器

玉米芯是一种极其便宜且易于获得的生物质，具有优异的亲水性。玉米芯的纵横交错的孔隙为高效的水分输送提供了通道。通过在玉米芯上涂覆炭黑 (CB) 薄膜制备了一种高效的太阳能蒸发器。涂有CB薄膜的玉米芯的光吸收明显增强，在太阳波段吸收率达94%以上。CB涂层玉米芯的蒸发率为1.425 kg/m2h，比未涂层玉米芯高78.1%。玉米芯高于水面的高度对蒸发性能有重要影响。当玉米芯高于水面2厘米时，最大蒸发率为1.88公斤/平方米。与高于水面0 cm相比，高于水面1 cm、2 cm和3 cm的玉米芯蒸发率分别提高了13.7%、32%和24%。研究了光照强度对蒸发性能的影响。虽然增加光强可以实现更高的蒸发速率，但会增加太阳能蒸发装置的复杂性和成本。基于玉米芯的界面蒸发器具有原料丰富、成本低廉的优点，可以对农作物废弃物进行再利用。更重要的是，制备方法非常简单，整个过程不需要使用复杂的机械设备。该研究将促进生物质材料在太阳能蒸汽发电领域的应用。基于玉米芯的界面蒸发器可以重复利用作物废料。更重要的是，制备方法非常简单，整个过程不需要使用复杂的机械设备。该研究将促进生物质材料在太阳能蒸汽发电领域的应用。基于玉米芯的界面蒸发器可以重复利用作物废料。更重要的是，制备方法非常简单，整个过程不需要使用复杂的机械设备。该研究将促进生物质材料在太阳能蒸汽发电领域的应用。