Preparation of TiO2/SiO2 composite oxide and its photocatalytic degradation of rhodamine B

Synthesis of Ag3PO4 using Hydrophylic Polymer and Their Photocatalytic Activities under Visible Light Irradiation

“…Figure 4 shows the photocatalytic activities of Ag3PO4 synthesized without and with hydrophylic polymer of PVA, PEG and PVP. The rate constants are evaluated by the following apparent pseudo-first-order kinetics equation [10,12,13] as depicted in Equation (2). (2) where C0 and C are the concentrations of dye in solution at times 0 and t, respectively, and kapp is the apparent pseudo-first-order rate constant (min −1 ).…”

“…The effective method for organic pollutant degradation is a key point in the wastewater treatment. Many researchers have used TiO2-based photocatalysts for organic pollutant degradation due to high reactivity and stability [1][2][3][4]. However, TiO2 cannot use visible light such as sunlight due to its large band gap energy.…”

Synergetic treatment of dye contaminated wastewater using microparticles functionalized with carbon nanotubes/titanium dioxide nanocomposites

“…The pH values mainly affected surface electronic properties, catalyst adsorption characteristics and the state of dye molecules, as a result of protonation of the amine functionalities within RhB molecules. 58,59 In the acidic media, chemisorption dominates the process due to the cationic form of RhB in this environment. In addition, the sorption process could be restrained due to the presence of H + ions, and electropositive charge is not protable for the photodegradation process of RhB.…”

“…In addition, the sorption process could be restrained due to the presence of H + ions, and electropositive charge is not protable for the photodegradation process of RhB. 59 The sorption efficiency of PDMS-MWCNTs/ TiO 2 increases with pH values varying from 3 to 9 during which chemisorption (MWCNTs/TiO 2 on PDMS-MWCNTs/TiO 2 surface) and physisorption (PDMS) had coaction for the uptake of RhB. Meanwhile, RhB is in the zwitterionic form when raising pH values and this could lead to an aggregation to larger molecular forms of the molecules, so-called dimer, which is benecial for a more efficient removal by PDMS.…”

TiO2-High Surface Area Materials Based Composite Photocatalytic Nanomaterials for Degradation of Pollutants: A Review

“…Moreover, the presence of the cerium could capture the charge carriers, while the Ce 4f levels improve the formation of electron-hole pairs, which can facilitate the Ce 4+ /Ce 3+ pairs to interact directly with dyes[187]. Likewise, different literature were available on the TiO 2 /SiO 2 based composite photocatalytic materials for the degradation of pollutants [Table 5,[188][189][190][191][192][193][194][195][196][197][198][199][200][201][202][203] and still the research is continuing on the development of efficient TiO 2 /SiO 2 based composite photocatalysts.…”