Amorphous High-Entropy Hydroxides of Tunable Wide Solar Absorption for Solar Water Evaporation,Particle & Particle Systems Characterization

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Amorphous High-Entropy Hydroxides of Tunable Wide Solar Absorption for Solar Water Evaporation
Particle & Particle Systems Characterization ( IF 2.7 ) Pub Date : 2021-09-02 , DOI: 10.1002/ppsc.202100094
Jie Pan _{1,

2,

3} , Yan Bao _{1,

2,

4,

5} , Hao Wang _{1,

2,

4,

5} , Fucong Lyu _{1,

2,

4,

5} , Lu Liu _{1,

2,

3} , Chong Wang _{1,

2,

4,

5} , Xinxue Tang _{1,

2,

3} , Jian Lu _{1,

2,

3,

4,

5} , Yang Yang Li _{1,

2,

3,

4,

5}

Affiliation

The high-entropy materials have raised much attention in recent years due to their extraordinary performances in mechanical, catalysis, energy storage fields. Herein, a new type of high-entropy hydroxides (e.g., NiFeCoMnAl(OH)_x) that are amorphous and capable of broad solar absorption is reported. A facile one-pot co-precipitation method is employed to synthesize these amorphous high-entropy hydroxides (a-HEHOs) under ambient conditions. The a-HEHOs thus obtained display widely tunable bandgap (e.g., from 2.6 to 1.1 eV) due to their high-entropy and amorphous characteristics, enabling efficient light absorbance and photothermal conversion in the solar regime. Further solar water evaporation measurements show that the a-HEHOs delivered a considerable energy conversion efficiency of 55%, comparable to black titanium oxides that are synthesized using more complex and expensive methods.

中文翻译：

用于太阳能水蒸发的可调宽太阳能吸收的无定形高熵氢氧化物

近年来，高熵材料因其在机械、催化、储能等领域的卓越性能而备受关注。在此，报道了一种新型的高熵氢氧化物（例如，NiFeCoMnAl(OH) _x），它是无定形的并且能够广泛吸收太阳能。采用简便的一锅共沉淀法在环境条件下合成这些无定形高熵氢氧化物 ( a -HEHO)。由于其高熵和无定形特性，因此获得的a -HEHO 显示出广泛可调的带隙（例如，从 2.6 到 1.1 eV），从而能够在太阳能区域中实现高效的光吸收和光热转换。进一步的太阳能蒸发测量表明，a-HEHO 的能量转换效率高达 55%，可与使用更复杂和更昂贵的方法合成的黑色氧化钛相媲美。

更新日期：2021-10-18

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