Green synthesis of Ag/ZnO microplates by doping Ag ions on basic zinc carbonate for fast photocatalytic degradation of dyes

Photocatalytic Penicillin Degradation Performance and the Mechanism of the Fragmented TiO2 Modified by CdS Quantum Dots

“…For this purpose, a variety of treatment methods have been developed to remove penicillin, including biological, physical, and chemical oxidation. , The chemical oxidation methods attract researchers’ attention because they can completely degrade the pollutants and avoid the generation of drug-resistant bacteria . The photocatalytic technology is one of the common methods to fulfill the chemical oxidation that removes pollutants by adopting redox reactions such as ozone oxidation, the Fenton reaction, and photocatalysis. ,, Since Fujishima and Honda first discovered that TiO 2 can successfully realize the water decomposition under visible light in 1972, the photocatalytic degradation technology has received extensive attention. Compared with other semiconductor photocatalysts, such as ZnO, CdS, CuS, and so forth, TiO 2 can be considered as the rapidly emerging water decomposition catalyst due to its advantages including nontoxicity, chemical stability, high photocatalytic activity, and low cost. , However, owing to a large band gap ( E g = 3.2 eV) and wavelength (387 nm), the current TiO 2 photocatalyst is largely limited by the inefficient utilization of solar energy and the rapid recombination rate of photo-generated electron–hole pairs, which eventually lead to lower photocatalytic degradation efficiency of TiO 2 .…”

“…The photocatalytic technology is one of the common methods to fulfill the chemical oxidation that removes pollutants by adopting redox reactions such as ozone oxidation, the Fenton reaction, and photocatalysis. ,, Since Fujishima and Honda first discovered that TiO 2 can successfully realize the water decomposition under visible light in 1972, the photocatalytic degradation technology has received extensive attention. Compared with other semiconductor photocatalysts, such as ZnO, CdS, CuS, and so forth, TiO 2 can be considered as the rapidly emerging water decomposition catalyst due to its advantages including nontoxicity, chemical stability, high photocatalytic activity, and low cost. , However, owing to a large band gap ( E g = 3.2 eV) and wavelength (387 nm), the current TiO 2 photocatalyst is largely limited by the inefficient utilization of solar energy and the rapid recombination rate of photo-generated electron–hole pairs, which eventually lead to lower photocatalytic degradation efficiency of TiO 2 . Therefore, varieties of strategies have been developed to improve the photocatalytic degradation efficiency of TiO 2 , including metal or nonmetal doping, − noble metal deposition, pigment sensitization, high-energy crystal plane exposure, and semiconductor doping. , Adopting appropriate chemical or physical methods to combine multiple semiconductors is an effective method to greatly improve the photocatalytic activity of TiO 2 .…”

“…15 The photocatalytic technology is one of the common methods to fulfill the chemical oxidation that removes pollutants by adopting redox reactions such as ozone oxidation, the Fenton reaction, and photocatalysis. 13,17,18 Since Fujishima and Honda 16 first discovered that TiO 2 can successfully realize the water decomposition under visible light in 1972, the photocatalytic degradation technology has received extensive attention. Compared with other semiconductor photocatalysts, such as ZnO, 18 CdS, 19 CuS, 20 so forth, TiO 2 17 can be considered as the rapidly emerging water decomposition catalyst due to its advantages including nontoxicity, chemical stability, high photocatalytic activity, and low cost.…”

“…13,17,18 Since Fujishima and Honda 16 first discovered that TiO 2 can successfully realize the water decomposition under visible light in 1972, the photocatalytic degradation technology has received extensive attention. Compared with other semiconductor photocatalysts, such as ZnO, 18 CdS, 19 CuS, 20 so forth, TiO 2 17 can be considered as the rapidly emerging water decomposition catalyst due to its advantages including nontoxicity, chemical stability, high photocatalytic activity, and low cost. 21,22 However, owing to a large band gap (E g = 3.2 eV) and wavelength (387 nm), the current TiO 2 photocatalyst is largely limited by the inefficient utilization of solar energy and the rapid recombination rate of photo-generated electron− hole pairs, which eventually lead to lower photocatalytic degradation efficiency of TiO 2 .…”