• 文献标题:   The synergistic effect of enhanced photocatalytic activity and photothermal effect of oxygen-deficient Ni/reduced graphene oxide nanocomposite for rapid disinfection under near-infrared irradiation
  • 文献类型:   Article
  • 作  者:   ZHANG Z, SUN JY, CHEN X, WU GZ, JIN ZG, GUO DG, LIU L
  • 作者关键词:   oxygen vacancy, reactive oxygen specie, photothermal, synergistic therapy, antibacterial
  • 出版物名称:   JOURNAL OF HAZARDOUS MATERIALS
  • ISSN:   0304-3894 EI 1873-3336
  • 通讯作者地址:  
  • 被引频次:   19
  • DOI:   10.1016/j.jhazmat.2021.126462 EA JUN 2021
  • 出版年:   2021

▎ 摘  要

The rational design of high antibacterial efficiency are urgently needed as the occurrence of drug-resistance issues. Hence, Ni/reduced graphene oxide nanocomposite (Ni/rGO) with different amounts of oxygen vacancies were fabricated for efficient disinfection. The optimized Ni/rGO (A100) exhibited highly effective inactivation efficacy of 99.6% and 99.5% against Escherichia coli and Bacillus subtilis within 8 min near-infrared (NIR) irradiation through the synergistic effects of photothermal therapy and oxidative damage, which were much higher than single treatment. The A100 nanocomposite achieved an extraordinary photothermal conversion efficiency (35.78%) under the 808 nm irradiation for enhanced photothermal hyperthermia, thereby destroying the cell membrane and accelerating the GSH depletion. The radical scavenger experiment confirmed that center dot O-2(-) and center dot OH play the chief role in photodisinfection reaction. Besides, A100 could exert significant damage on the ATP synthesis. The excellent photothermal performance and photocatalytic activity can be attributed to the appropriate oxygen vacancy density, which improves the absorption of NIR light and facilitates the separation of photogenerated electron-hole pairs. Besides, the higher NiO content of A100 contributed to improving the photocatalytic effect. Our work demonstrated a promising strategy for efficient water pollution purification caused by pathogenic bacteria.