A simple, low-cost Mo/MoO₃ textured spectrally selective solar absorber coating prepared using an ultrasound-assisted wet chemical technique on a Mo substrate at different chemical reaction times is presented. The X-ray diffraction structural analysis of the textured coatings revealed only peaks related to Mo from the substrate, implying that the MoO₃ coatings were amorphous at ambient temperature. X-ray photoelectron spectroscopy and energy dispersive X-ray spectroscopy confirmed the presence of Mo⁺⁶ ions representing MoO₃ in the coatings. The topologic investigations using atomic force microscopy indicated texturized growth with an average surface roughness of 53.15 nm for the sample attacked for 4 h. Absorption bands related to M=O and Mo-O stretching bonds were evident from Fourier transform infrared measurements. Scanning electron microscopy investigations confirmed the presence of surface texturing and agglomerated nanoparticles in the coatings. Optical investigations of the MoO₃ coatings on the Mo substrate revealed both a high solar absorptance of 0.91 and a low thermal emittance of 0.05 at 100°C indicating very good solar selectivity. These optical properties can arise from both light trapping which favors multiple absorptions, and intrinsic effects that result from the textured and intrinsic spectrally selective solar absorber design. These results demonstrate that Mo/MoO₃ textured and intrinsic coatings deposited by using ultrasound-assisted chemical bath etching and oxidation are exceptional materials for selective solar absorber applications.

介绍了一种简单、低成本的 Mo/MoO ₃织构光谱选择性太阳能吸收涂层，该涂层使用超声辅助湿化学技术在不同化学反应时间的 Mo 基板上制备。织构涂层的 X 射线衍射结构分析仅显示与来自基材的 Mo 相关的峰，这意味着 MoO ₃涂层在环境温度下是无定形的。X 射线光电子能谱和能量色散 X 射线光谱证实存在代表 MoO ₃的 Mo ⁺⁶离子在涂料中。使用原子力显微镜的拓扑研究表明，对于攻击 4 小时的样品，平均表面粗糙度为 53.15 nm 的纹理化生长。从傅里叶变换红外测量中可以明显看出与 M=O 和 Mo-O 拉伸键相关的吸收带。扫描电子显微镜研究证实了涂层中存在表面纹理和聚集的纳米颗粒。MoO _{3 的}光学研究Mo 基板上的涂层显示在 100°C 时具有 0.91 的高太阳能吸收率和 0.05 的低热发射率，表明非常好的太阳能选择性。这些光学特性可能来自有利于多重吸收的光捕获，以及由纹理和本征光谱选择性太阳能吸收器设计产生的内在效应。这些结果表明，通过使用超声辅助化学浴蚀刻和氧化沉积的Mo/MoO ₃纹理和本征涂层是用于选择性太阳能吸收器应用的特殊材料。