Synthesis, Structural and Optical Properties of Mn Doped ZnO with its Photocatalytic Activity

Abstract

Industrial development is an inevitable factor in the growth of any nation and on the other hand it's also the factor for increasing the pollution caused from hazardous metals [1]. Irrelevant of whether advanced or not, the problem faced by almost all sectors of every country is the rottenness caused mainly by ground water contamination, air pollution in large scale and hazardous metal wastes. Chromium is a metal that has found its place in the industrial area with its wide application in electroplating, tanning, refractory materials, wood preservatives and many more [2] but it has also received biological attention due to its major role in contributing to the industrial pollution and its toxicity to plants and animals [3]. The existence of Cr is in two states, i.e., trivalent and hexavalent chromium. The hexavalent form of chromium is 500 times more toxic than the trivalent form [4]. Chromium(VI) and its compounds are highly toxic when inhaled or ingested. It is hemotoxic, genotoxic and carcinogenic. When hexavalent

Investigation on copper–nickel co-doped anatase titania nanospheres as an efficient material for photocatalytic and photovoltaic applications

“…The peak absorbed at 554 nm is related to n–π* transition which is due to the red colour of the dye solution. 54…”

“…The photocatalytic activity test was conducted using a handmade photoreactor assembly (LED: White, Watt: 50 kW, and the chiller was attached) created by P. Gautham et al 54 5 ppm of Rhodamine-B dye was dissolved in 100 ml of deionized water. 0.1 g of the prepared photocatalysts was dispersed into the Rhodamine-B dye solutions and exposed to visible light.…”

“…The photocatalytic activity test was conducted using a handmade photoreactor assembly (LED: White, Watt: 50 kW, and the chiller was attached) created by P. Gautham et al 54…”

Preparation and characterisation of nickel oxide and nickel oxide codoped with magnesium and zinc

“…Zinc oxide doped with magnesium was studied for its structural, optical, and photocatalytic properties [15]. A detailed report is available on the investigation of synthesis, structural and optical properties of zinc oxide doped with manganese [16]. Magnesium oxide codoped with nickel and cobalt was investigated for its electrochemical biosensor applications IOP Publishing doi:10.1088/1757-899X/1291/1/012021 2 [17].…”

Template-free chemical deposition of highly crystalline ZnO nanorod thin films

“…Among various one-dimensional semiconducting nanostructures, zinc oxide (ZnO) and metal-doped ZnO continue to attract attention owing to their enormous utility in a multitude of applications such as light emission, light detection, photovoltaics, sensing, energy harvesting and photocatalysis. [1][2][3][4][5][6][7][8] Both top-down and bottom-up approaches have been used in the past to synthesize ZnO nanostructures with a multitude of morphologies such as spherical nanoparticles, nanorods, nanowires and nanotubes in powder and film forms. In general, the top-down approach is employed whenever device quality nanostructured films are required, and the bottom-up approach is exploited when large-scale production of nanopowders is desirable.…”