Ambient Light-Activated Antibacterial Material: Manganese Vanadium Oxide (Mn2V2O7),ACS Applied Bio Materials

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Ambient Light-Activated Antibacterial Material: Manganese Vanadium Oxide (Mn2V2O7)
ACS Applied Bio Materials ( IF 4.6 ) Pub Date : 2021-08-12 , DOI: 10.1021/acsabm.1c00605
Jagriti Singh ₁ , Prajwal B Hegde ₁ , Pramod Ravindra ₁ , Prosenjit Sen ₁ , Sushobhan Avasthi ₁

Affiliation

Antimicrobial surfaces can reduce the spread of bacteria from high-touch surfaces, saving millions of lives worldwide. Antibacterial photocatalytic films, like TiO₂, are widely reported but limited in practice because they need high-intensity UV light. More practical but less reported are photocatalysts that work under low-intensity visible light from an indoor lamp. Here, we demonstrate that manganese vanadium oxide (MVO) is an antibacterial photocatalyst that works under light-emitting diode (LED) lights at ∼3000 lux. MVO is an earth-abundant semiconductor with a band gap of 1.7 eV that absorbs visible light to create reactive oxygen species (ROS) in water. ROS reduces bacteria counts by 4 orders of magnitude in 8 h under 9000 lux LED light. The antibacterial effect is significant even in MVO powder and films, which are amenable to large-area fabrication. MVO is a promising candidate for next-generation antimicrobial coatings that are stable, cheap, effective, earth-abundant, and activated by indoor lights.

中文翻译：

环境光活化抗菌材料：锰钒氧化物（Mn2V2O7）

抗菌表面可以减少细菌从高接触表面传播，从而挽救全球数百万人的生命。抗菌光催化薄膜，如 TiO ₂，被广泛报道但在实践中受到限制，因为它们需要高强度的紫外线。更实用但报道较少的是在室内灯发出的低强度可见光下工作的光催化剂。在这里，我们证明锰钒氧化物 (MVO) 是一种抗菌光催化剂，可在 ~3000 勒克斯的发光二极管 (LED) 灯下工作。MVO 是一种地球丰富的半导体，带隙为 1.7 eV，可吸收可见光以在水中产生活性氧 (ROS)。在 9000 勒克斯 LED 灯下，ROS 在 8 小时内将细菌数量减少 4 个数量级。即使在适合大面积制造的 MVO 粉末和薄膜中，抗菌效果也很显着。MVO 是下一代抗菌涂料的有希望的候选者，这种涂料稳定、便宜、有效、储量丰富且可被室内灯光激活。

更新日期：2021-09-20

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