The Institute of Seawater Desalination and Multipurpose Utilization, Ministry of Natural Resources of the People's Republic of China, Tianjin, 300192, China.
Tianjin Haiyue Water Treatment High-tech Co., Ltd., Tianjin, 300192, China.
Environ Sci Pollut Res Int. 2020 Dec;27(36):45775-45786. doi: 10.1007/s11356-020-10511-x. Epub 2020 Aug 15.
Mechanically robust FeO/porous carbon/diatomite composite monolith was prepared from waste corrugated cardboard box and diatomite via slurrying in FeCl solution, dewatering, molding, and carbonization at 600 °C. The products were characterized by X-ray diffraction (XRD), field emission scanning electron microscope (SEM), N-adsorption/desorption, Raman spectroscopy, and ultraviolet-visible-near-infrared (UV-Vis-NIR) spectroscopy. The water wettability, photothermal conversion property, and solar steam generation performance of the products were also evaluated. Results showed that the presence of FeCl led to the formation of more pores and magnetic FeO crystallites, while diatomite provided good hydrophilicity for the composite. The product exhibited light absorption above 65% within the wavelength ranging from 200 to1974 nm, and its surface temperature eventually increased by 30 °C under 0.25 sun irradiation due to photothermal effect. Moreover, solar steam yield under 0.25 sun irradiation for 3600 s was improved by 67% with the presence of the monolithic composite because of the occurrence of interfacial solar steam generation and heat transfer from the composite acted as a heat island.
采用废瓦楞纸箱和硅藻土为原料，通过在 FeCl 溶液中搅拌、脱水、成型和在 600°C 下碳化，制备出机械性能稳定的 FeO/多孔碳/硅藻土复合整体材料。采用 X 射线衍射（XRD）、场发射扫描电子显微镜（SEM）、N2 吸附/脱附、拉曼光谱和紫外-可见-近红外（UV-Vis-NIR）光谱对产物进行了表征。还评估了产物的润湿性、光热转换性能和太阳能蒸汽生成性能。结果表明，FeCl 的存在导致形成更多的孔和磁性 FeO 晶体，而硅藻土为复合材料提供了良好的亲水性。该产物在波长为 200nm 至 1974nm 的范围内表现出超过 65%的光吸收，由于光热效应，其表面温度在 0.25 个太阳照射下最终升高了 30°C。此外，由于界面太阳能蒸汽发生和复合体内热传递作用形成热岛，在 0.25 个太阳照射下，3600s 内太阳能蒸汽的产率提高了 67%。
