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A method for preparing self-assembled nanostructured composites for solar energy absorption

A technology of solar energy absorption and nanostructure, which is applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science. The effect of low heat loss

Active Publication Date: 2022-04-12
JIANGNAN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The above method still has the following defects: the energy consumption of the equipment is large; the absorption rate of the coating prepared by this method is good, but there is still room for improvement; in recent years, the requirements for environmental protection have been continuously improved, and the coating containing Cr will produce source of pollution, so it is necessary to select solar absorbing elements that can replace Cr

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  • A method for preparing self-assembled nanostructured composites for solar energy absorption
  • A method for preparing self-assembled nanostructured composites for solar energy absorption

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Embodiment 1

[0027] The purchased alloy plate (Cu:Ni:Fe=1.2:1:4) was cut into 3cm×3cm with a thickness of 0.3mm as the working electrode, and the graphite plate was used as the auxiliary electrode. The two electrode systems were placed in a mixed chromic acid and sulfuric acid (1:1 molar ratio) electrolyte solution (1.5 mol / L concentration). During the electrochemical treatment, apply a square wave modulation potential; adjust the higher potential E of the square wave pulse H =0.6v and lower potential E L =-0.6v and the width of each pulse t H = 0.02s and t L＝ 0.06s, lasting 20min, can form a typical black surface on the alloy. The substrate was taken out, rinsed with distilled water, and dried in an oven at 60°C. The resulting black coating was a self-assembled nanostructure composite material for solar energy absorption.

[0028] The surface of the prepared composite material sample (5 μm × 5 μm) was observed under AMF, and the obtained image was as follows figure 1 shown. The stan...

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Abstract

The invention discloses a method for preparing a self-assembled nanostructure composite material for solar energy absorption, belonging to the technical field of functional coatings. The invention directly builds a self-assembled nanostructure on the surface of the alloy compounded with three transition metals through electrochemical treatment, and its nanoneedle array structure is beneficial to light capture and surface reflection reduction, and can realize multiple reflection and absorption of incident light. The films, whose main components are spinel oxides of transition metals, are mainly formed by electrochemically inducing the oxidation of metals in the substrate. Intrinsic absorption of spinel oxides is the dominant absorption mechanism. The absorbing coating of this structure has a high absorption rate in the solar spectrum, and has low heat loss, and has excellent selective absorption performance.

Description

technical field [0001] The invention relates to a preparation method of a self-assembled nanostructure composite material used for solar energy absorption, and belongs to the technical field of functional coatings. Background technique [0002] In recent years, nanostructured materials have attracted extensive attention in the academic circle due to their excellent mechanical, optical, and electrical properties. Nanostructured materials have great advantages in light absorption and are widely used in the field of solar energy. The key to solar absorbing materials lies in their high absorptivity in the near-wave band and low thermal radiation in the far-wave band, and two-dimensional periodic nano- or micro-structured surfaces are proven to be an option for spectral control. Recently, coatings with extremely low reflectivity have been physically obtained on Si and W metals, however, they do not exhibit spectral selectivity in the visible-infrared region. [0003] Studies ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/34B82Y30/00B82Y40/00
CPCC25D11/34C25D11/024B82Y30/00B82Y40/00
Inventor 姚伯龙王宇通陈欢倪亚洲程广鸿王海潮张晋瑞
Owner JIANGNAN UNIV
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