A Study on Doping and Compound of Zinc Oxide Photocatalysts

Abstract

As an excellent semiconductor photocatalyst, zinc oxide is widely used in the field of photocatalysis and is regarded as one of the most reliable materials to solve environmental problems. However, because its band gap energy limits the absorption of visible light and reduces the efficiency of catalytic degradation, it needs to be doped with other substances or compounded with other substances and precious metal. This paper summarizes the research on this aspect at home and abroad in recent years, introduces the doping of transition metal ions by zinc oxide, the compounding of zinc oxide with precious metals or other semiconductors, and the prospect of further improving the catalytic efficiency of zno photocatalyst is also put forward.

An environment friendly multifunctional ZnO/wood fiber composite for the treatment of wastewater mixed with emulsions and dye

“…19,20 ZnO is relatively stable, nontoxic, cheap, and highly efficient in the photocatalytic destruction of dyes. 21 In addition, ZnO demonstrated remarkable biocidal properties. 22 Fig.…”

Photocatalytic Degradation, Anticancer, and Antibacterial Studies of Lysinibacillus sphaericus Biosynthesized Hybrid Metal/Semiconductor Nanocomposites

“…Among the various photocatalysts, zinc oxide (ZnO) is an excellent semiconductor photocatalyst that is also chemically stable, cost-effective, and non-toxic. However, the band gap energy of 3.37 eV limits the most efficient photocatalytic degradation of dyes by ZnO under ultraviolet (UV) light and is less efficient under visible wavelengths [ 20 ]. There have been several attempts to enhance the photocatalytic performance of ZnO, including increasing the specific surface area and refining the grain size [ 20 , 21 , 22 ].…”

“…However, the band gap energy of 3.37 eV limits the most efficient photocatalytic degradation of dyes by ZnO under ultraviolet (UV) light and is less efficient under visible wavelengths [ 20 ]. There have been several attempts to enhance the photocatalytic performance of ZnO, including increasing the specific surface area and refining the grain size [ 20 , 21 , 22 ]. Currently, element doping and recombination with metals in semiconductors producing nanocomposites (NCs) are commonly used to improve the photoresponse range of ZnO NPs as a photocatalyst.…”

Double Network Physical Crosslinked Hydrogel for Healing Skin Wounds: New Formulation Based on Polysaccharides and Zn2+

“…Zn is an indispensable trace element in the human body and a vital metal substance in modern industry. Zn has a wide range of applications in the field of materials, such as zinc-based nanocomposites [19], active electrodes [20], batteries [21], photocatalysts [22], polymer nanocarriers [23], wound dressings, etc. In wound dressings, Zn can promote wound healing by inducing skin regeneration and eradicating bacteria and has been widely used as a cross-linking agent and functional substance [24,25].…”