Superior photodecomposition of pyrene by metal ion-loaded TiO2 catalyst under UV light irradiation

Abstract

The Fermi level is referred to as the electrochemical potential and plays an important role in the band theory of solids. When metal and semiconductor are in contact, electron migration from photoirradiated semiconductor to the deposited metal occurs at the interface until two Fermi levels equilibrate and enhanced the photocatalytic activity of semiconductor photocatalyst. Ni2+ having more negative reduction potential (−0.25 eV) than the CB of TiO2 imparts negligible co-catalytic activity to TiO2 photoreaction. It also revealed that loading of Au3+ ions displayed higher degradation rate of pyrene than Au photodeposition. Furthermore, when the amount of dissolved Fe+3 and Au3+ ions gradually increases from 0.1 to 2 wt.%, the pyrene photodecomposition rate also become faster.

Highly Efficient Photocatalytic Degradation Performance of CsPb(Br1–xClx)3-Au Nanoheterostructures

“…Then, Sudan Red III can be strongly degraded to nontoxic product by O 2 − or •OH. 25,26 It should be noted that the decoration of Au NCs here acts like a hole reservoir, and the capability of Au NCs reservoir to receive holes from perovskite NCs is sizedependent. It would show high efficiency only when the size of Au NCs is below 5 nm.…”

“…The dissolved O 2 can easily trap photoelectrons to produce superoxide anion radicals (O 2 – ), and the photoholes will react with OH – to form hydroxy radicals (·OH) on the surface of Au NCs. Then, Sudan Red III can be strongly degraded to nontoxic product by O 2 – or ·OH. , It should be noted that the decoration of Au NCs here acts like a hole reservoir, and the capability of Au NCs reservoir to receive holes from perovskite NCs is size-dependent. It would show high efficiency only when the size of Au NCs is below 5 nm .…”

A Facile Low‐Temperature Hydrothermal Method to Prepare Anatase Titania/Cellulose Aerogels with Strong Photocatalytic Activities for Rhodamine B and Methyl Orange Degradations

“…The generated electronhole pairs immediately interacted with surface adsorbed molecular oxygen to yield superoxide radical anions ( • O 2 − ) and with water to produce the highly reactive HO • radicals, respectively. These radicals groups repeatedly attacked RhB and MO molecules, eventually resulting in their degradations into CO 2 and H 2 O [42,43], which were responsible for the photocatalytic activity.…”

SOLAR LIGHT ACTIVE CeO2/rGO HYBRID PHOTOCATALYST FOR DIRECT VIOLET 51 DEGRADATION

“…-1(b). In contrast, to GO, the rGO and CeO 2 /rGO-HYBDS are exhibits their reflection peak (002) at 25° and 26.2°4 3,44 It is necessary to omit the adsorption of dye on the catalyst-composite surface for the calculation of net photocatalytic degradation. As seen from the Fig.…”

“…Predominantly dye effluents, due to their harmful nature, toxicological and deep coloring . [1][2][3] So far various physico chemical and biological treatment technologies are adopted for the environmental remediation, protection and control of dye effluents. The photocatalyst is applied for the remediation of water pollution continuing from the mid of 19 th century.…”