Effect of the bottom layer thickness on the structural and optical phase transition properties of V2O5/V/V2O5 thin films

Khanyile, B.S.; Madiba, I.G.; Mtshali, C.; Mabakachaba, B.; Moloi, S.J.; Nkosi, M.; Mâaza, M.

doi:10.1016/j.matpr.2022.01.483

Cited by 1 publication

(1 citation statement)

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“…Numerous materials have been widely investigated for use in blocking NIR radiation, including NIR−reflecting materials such as TiO 2 , BaTiO 3 , Cr−doped BiPO 4 , etc. [11][12][13][14], NIR absorption materials, for instance, metals (Cu and Au), metal oxides (SnO 2 , V 2 O 5 , and WO 3 ), as well as the associated material dopants [15][16][17][18][19][20][21][22]. Considering light pollution in reflective materials [23,24], NIR−absorbing materials exhibit more potential in many application scenarios and requirements due to their excellent tunable optical, electrical, and magnetic capacities [25].…”

Section: Introductionmentioning

confidence: 99%

Advanced Dual−Function Hollow Copper−Sulfide−Based Polyimide Composite Window Film Combining Near−Infrared Thermal Shielding and Organic Pollutants’ Photodegradation

Liu

Shen

et al. 2022

Polymers

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Window−film−integrated, near−infrared (NIR) absorption−based nanomaterials are of great interest in terms of numerous demands to reduce energy consumption, especially in buildings and vehicles. However, the question of how to effectively manage thermal energy generated from NIR harvesting in light−absorbing materials, rather than being wasted or causing negative effects, remains challenging. Herein, hollow copper sulfide (Cu2−xS) on colorless polyimide (PI) films, enabling them to be well−dispersed and robustly adhered, underwent in situ growth fabrication and were utilized as NIR−thermal−shielding and organic−pollutant−removal dual−function window films. Due to strong NIR absorbance, arising from the heavy hole−doping (copper cation deficiency), the Cu2−xS/PI composite film exhibited great promise for use in the filtration of the NIR spectrum. By monitoring Cu2−xS densities, its NIR−shielding efficiency reached 69.4%, with hundred−percent UV blocking and consistent performance within the reliability (85 °C/85%RH) tests over one week as well as 5000 bending cycles. The integration of the films into model cars and building windows exhibited excellent thermal−shielding performance upon exposure to direct sunlight. Moreover, benefiting from the distinctive distribution of Cu2−xS, the additional thermal energy (holes) generated in NIR absorption was successfully utilized. The densely surface−confined hollow structure of Cu2−xS on PI significantly endowed good formaldehyde catalytic capacity, with removal efficiency reaching approximately 72% within 60 min and a negligible decline after quartic reuse. These integration methodologies enable the promising fabrication of a high−performance, bifunctional window film combining thermal shielding and indoor organic pollutant removal.

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