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首页> 外文期刊>RSC Advances >Structural evolution from CuS nanoflowers to Cu9S5 nanosheets and their applications in environmental pollution removal and photothermal conversion
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Structural evolution from CuS nanoflowers to Cu9S5 nanosheets and their applications in environmental pollution removal and photothermal conversion

机译：从CuS纳米花到Cu9S5纳米片的结构演变及其在环境污染去除和光热转化中的应用

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摘要

Three-dimensional (3D) CuS nanoflowers and 2D single crystalline Cu9S5 nanosheets with irregular hexagonal holes have been successfully synthesized by easily hydrothermally treating a solution of copper dichloride dihydrates and thiourea at 180 degrees C for several hours without any surfactants and morphology-controlling agents. Irregular hexagonal holes were widely distributed over the Cu9S5 nanosheets, which could efficiently enlarge the surface area. The UV-vis-NIR absorption spectroscopy showed an obvious increase of the near-IR absorbance. The influence of the reaction time, morphology, and crystal phase on the photocatalysis and photothermal conversion was discussed. The results revealed that CuS nanoflowers displayed the maximum removal value of rhodamine B of 67%. The Cu9S5 nanosheets obtained with the increase reaction time displayed an adsorption and photo-degradation decrease for RhB. The exposure of the aqueous dispersion of the Cu9S5 nanosheets prepared with 6 h (2.0 g L-1) under the irradiation of a 980 nm laser can increase its temperature by 25.1 degrees C in 600 s, exhibiting a good photothermal conversion performance. The photothermal efficacy increases with the samples obtained from 1 h to 18 h.
机译：通过轻松地在180°C下将二氯化铜二水合物和硫脲溶液进行水热处理数小时，无需任何表面活性剂和形态控制剂，即可成功合成具有不规则六边形孔的三维（3D）CuS纳米花和2D单晶Cu9S5纳米片。不规则的六角形孔广泛分布在Cu9S5纳米片上，可以有效地扩大表面积。紫外可见近红外吸收光谱显示近红外吸收率明显增加。讨论了反应时间，形态和晶相对光催化和光热转化的影响。结果表明，CuS纳米花显示若丹明B的最大去除值为67％。反应时间增加而获得的Cu9S5纳米片材对RhB的吸附和光降解降低。在980 nm激光的照射下，用6 h（2.0 g L-1）制备的Cu9S5纳米片的水分散体的暴露可以在600 s内将其温度提高25.1摄氏度，表现出良好的光热转换性能。从1小时到18小时，光热功效随样品的增加而增加。

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