Visible light driven efficient photocatalytic degradation of Congo red dye catalyzed by hierarchical CuS–Bi₂Cu_xW_1−xO_6−2x nanocomposite system

Abstract

A series of CuS–Bi2CuxW1−xO6−2x nanocomposite materials were prepared and evaluated as photocatalyst for degradation of Congo red dye from aqueous sources.

Synthesis of ZnTiO3@TiO2 Heterostructure Nanomaterial as a Visible light Photocatalyst

“…However, it was decreased significantly when the IPA was introduced. This confirms that the hydroxyl radicals are the main active species for the photocatalytic degradation of Congo red …”

“…So, to know the effect of catalyst amount, different weights of ZnTiO 3 @TiO 2 heterostructure nanomaterial were used in the range of 25–75 mg for the photodegradation study by keeping the initial dye concentration of Congo red 2.5X10 −5 M at natural pH (see Figure S6 (a)). The degradation efficiency of the CR significantly increases by the increase of catalyst amount for the reason that the increase in efficiency of degradation might be assigned to the presence of more number of active surface sites for the degradation process …”

“…Azo dyes (non‐biodegradable organic pollutant) are one of the synthetic organic compounds having a number of aromatic amines which are classified as carcinogenic, particularly Congo red. Congo red (CR) is a typical diphenyl amine azo dye (a type of organic pollutant in wastewater) has high thermal, optical and physicochemical stability, which affects not only aquatic life but also the food web . So for human health as well as for the environment, it is highly essential to control and reduce such type of water pollution growth.…”

Synthesis, Characterization, and Photocatalytic Application of Type‐II CdS/Bi2W2O9 Heterojunction Nanomaterials towards Aerobic Oxidation of Amines to Imines

“…In the high‐resolution spectral region for Bi, doublets are observed at 158.8 eV and 164 eV (Figure b). These peaks are assigned to photoelectron emission from the Bi4f 7/2 and Bi4f 5/2 electronic states of Bi in the +3 oxidation state , , , . In this spectral region, a noticeable, low‐intensity broad peak at 162.4 eV is assigned to the S2p state , …”

Photocatalytic Degradation of Congo Red Using PbTiO3 Nanorods Synthesized via a Sonochemical Approach

“…The reason of chosen Congo red dye in this work because of its high solubility in water solution, complex chemical structure, and its firmness, once it is discharged into the natural environment ,. Hence, because of its malefic health effect, it is essential to remove these types of toxic dyes from the aquatic sources in an efficient and economical way …”