碳化-氧化废报纸用于太阳能水蒸发

Carbonized-oxidized Waste Newspaper for Solar Water Evaporation

碳材料有优异的宽波段光吸收特性和良好的光热转换性能,因此可以用于太阳能水蒸发。将废旧报纸碳化-氧化处理后得到碳材料,用X射线粉末衍射仪和扫描电子显微镜对样品进行相组成和微观结构表征,用紫外-可见光谱仪测试样品的光吸收性能,并且用自组装的装置进行太阳能水蒸发性能测试。结果表明:经过碳化-氧化处理后的废旧报纸在太阳光谱范围吸收率高于87%,在紫外-可见光区的吸收率达到93%,和水的接触角接近零。在一个太阳光强度下,碳化-氧化废旧报纸的水蒸发速率为0.76 kg·(m 2·h)-1,是未加样品时的4倍。样品用于海水淡化时所得淡水的离子含量符合国家饮用水标准,用于甲基橙溶液的处理可以实现完全脱色。

Carbon materials have excellent broad band absorption properties and remarkable photothermal conversion properties.Therefore,they can be used for solar water evaporation.In this paper,carbon materials were obtained by carbonization and oxidation of waste newspapers.The phase composition and microstructure of the samples were characterized on X-ray diffractometer and scanning electron microscopy.The absorption properties of the samples were studied on an ultraviolet visible spectrometer.The performance of solar water evaporation was tested by a self-assembled device.The results show that the optical absorption of the waste newspaper after carbonization and oxidation is higher than 87%in the solar spectrum range,and reaches 93%in the UV-visible region.The water contact angle is close to zero.At one-sun intensity,the water evaporation rate of the carbonization-oxidation waste newspaper was 0.76 kg·(m 2·h)-1,four times as high as the water evaporation rate without the sample.The ionic content of the fresh water obtained from the desalination of the sample meets the national drinking water standard.The recover water can be completely decolorized when the sample is used for the treatment of methyl orange solution.