Morphology controlled synthesis and photocatalytic activity of zinc oxide nanostructures

Role of Structural Decisive via Ultra‐Sonication on Photocatalytic Response of MWCNTs Intercalated ZnO Composites

“…[ 26 ] The peak at 3745 cm −1 is related to the stretching vibration of hydroxyl groups on the surface of ZnO catalysts and the peak at 1525 cm −1 represents the stretching mode of adsorbed molecules onto ZnO. [ 27–29 ]…”

“…[26] The peak at 3745 cm −1 is related to the stretching vibration of hydroxyl groups on the surface of ZnO catalysts and the peak at 1525 cm −1 represents the stretching mode of adsorbed molecules onto ZnO. [27][28][29] In the spectra of ZnO 99 /MWCNT 1 and ZnO 95 /MWCNT 5 composites the bonding peaks are similar with little enhance intensity due to higher concentration of MWCNTs in which the intensity of peak at 1523 cm −1 is related to the stretching vibration of -C=C-in MWCNTs. [30] Also, the broadness in peak at 3743 cm −1 indicates absorbed -OH groups on MWCNTs.…”

Preparation of functionalZnOnanoparticles and their application asUVphotosensitizer and reinforcing agent for waterborne polyurethane acrylate composite coating

“…Figure 7a is UV absorption spectra of ZnO NPs‐C, ZnO NPs‐S, and ZnO NPs‐P. When the wavelength range is between 270 and 370 nm, the three kinds of ZnO NPs with different morphologies have a broad absorption peak for UV, and a relatively sharp absorption peak appears when the wavelength range is between 200 and 270 nm, which indicates that ZnO NPs have certain ability to absorb UV 29 . The band gap energy curves of ZnO NPs‐C, ZnO NPs‐S, and ZnO NPs‐P are shown in Figure 7b.…”

“…When the wavelength range is between 270 and 370 nm, the three kinds of ZnO NPs with different morphologies have a broad absorption peak for UV, and a relatively sharp absorption peak appears when the wavelength range is between 200 and 270 nm, which indicates that ZnO NPs have certain ability to absorb UV. 29 The band gap energy curves of ZnO NPs-C, ZnO NPs-S, and ZnO NPs-P are shown in Figure 7b. The band gap energies (E g ) of three kinds of ZnO NPs with different morphologies were calculated according to Kubelka-Munk (KM) function 30 and Tauc plot, 31 as shown in the following formula.…”

Improved photocatalytic activity of ZnO-[10%]BiOI and ZnO-[10%]WO3 heterostructure in the destruction of 2-chlorobiphenyl

“…8 A variety of semiconductor photocatalysts (TiO 2 , ZnO, Fe 2 O 3 , CdS and ZnS etc) have been deployed for the purpose of photo-oxidation of pollutants, with TiO 2 remaining the most studied and utilized material to date. [9][10][11][12][13][14][15] This is because of its high oxidative power, economy, photostability, non-toxicity, chemical stability and quick electron transfer to molecular oxygen under UV light. [16][17][18] Despite all listed positives, TiO 2 has been reported to suffer from major drawbacks, such as difficulty in recovering and utilization of fine titania powders (which has prevented its large scale utilization in photocatalytic processes), higher cost (compared with ZnO), high charge carrier recombination, and low absorption rate over the UV spectrum, amongst others.…”