丝瓜络封装NiO/Co_(3)O_(4)复合材料的制备及其界面蒸发性能研究

Preparation and interfacial evaporation properties of loofah encapsulated NiO/Co_(3)O_(4) composites

以丝瓜络为载体,采用超声辅助真空吸附法制备不同组分比的丝瓜络封装NiO/Co_(3)O_(4)复合材料。利用扫描电子显微镜(SEM)、广角X射线衍射仪(WAXD)、傅里叶变换红外光谱仪(FT-IR)、紫外分光光度计、氙灯蒸发仪对丝瓜络封装NiO/Co_(3)O_(4)复合材料的微观形貌、晶体结构、官能团结构、吸光度以及水蒸发速率进行测试。SEM和WAXD结果表明:NiO和Co_(3)O_(4)已物理附着在丝瓜络中,且丝瓜络封装NiO/Co_(3)O_(4)复合材料未产生新的结晶衍射峰;光催化降解及蒸发速率测试结果表明,在250W紫外灯照射下,组分比为3∶1的NiO/Co_(3)O_(4)复合材料对罗丹明B降解率达到48%;在1.5kW/m^(2)的太阳光照强度下,组分比为5∶1的NiO/Co_(3)O_(4)复合材料的蒸发速率达到1.44kg/(m^(2)·h),是纯水自然蒸发速率的10~15倍。

Using loofah as the carrier,a series of loofah encapsulated NiO/Co_(3)O_(4) composites with different component ratios were prepared by ultrasound-assisted vacuum adsorption method.The microscopic morphology,crystal structure,functional group structure,absorbance and water evaporation rate of the loofah encapsulated NiO/Co_(3)O_(4) composites were tested by scanning electron microscopy(SEM),wide-angle X-ray diffractometer(WAXD),Fourier transform infrared spectroscopy(FT-IR),ultraviolet spectrophotometer and xenon lamp evaporator.The results of SEM and WAXD showed that NiO and Co_(3)O_(4) had been successfully physically attached into the loofah,and no new crystalline diffraction peaks were generated in the NiO/Co_(3)O_(4) composites encapsulated with loofah.The photocatalytic degradation and evaporation rate results revealed that under the irradiation of 250W UV lamp,the degradation rate of Rhodamine B by the NiO/Co_(3)O_(4) composites reached about 48%when the component ratio was 3∶1.Under the sunlight intensity of 1.5kW/m^(2),the evaporation rate of NiO/Co_(3)O_(4) composites with a component ratio of 5∶1 reached 1.44kg/(m^(2)·h),which was 10~15 times that of the natural evaporation rate of pure water.