Visible-light-responsive photocatalyst based on ZnO/CdS nanocomposite for photodegradation of reactive red azo dye and ofloxacin antibiotic

Tho

et al. 2021

Environ Sci Pollut Res

Photocatalytic deg radation of environmental pollutants is being up to date for the treatment of contaminated water. In the present study, ZnO/CuO nanomaterials were successfully fabricated by a simple sol-gel method and investigate the photodegradation of rhodamine B (RhB). The synthesized ZnO/CuO nanoparticles were characterized by X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectroscopy (UV-Vis-DRS), thermal analysis (TGA), surface charge, and Fourier transform infrared spectroscopy (FTIR). The photo-degradation of the dye RhB was followed spectroscopically. The overall composition of ZnO/CuO material was found to be wurtzite phase, with particle size of 30 nm, and the Vis light absorption increased with an increase of Cu content. The ZnO/CuO nanomaterials were highly active leading to a photo-degradation of 10 ppm RhB reaching 98% within 180 min at 0.1 g/L catalyst dosage. The change in surface charge after degradation evaluated by ζ potential measurements and the differences in functional vibration group monitored by Fourier transform infrared spectroscopy (FTIR) indicates that the RhB adsorption on the Zn 45 Cu surface was insignificant. And scavenging experiments demonstrate that the RhB degradation by ZnO/CuO nanomaterials involves to some degree hydroxyl radicals.

Section: Characterization Of Zno/cuo Materialsmentioning

confidence: 99%

Synthesis, characterization of novel ZnO/CuO nanoparticles, and the applications in photocatalytic performance for rhodamine B dye degradation

Tho

et al. 2021

Environ Sci Pollut Res

“…View Article Online DOI: 10.1039/D1MA00906K [202]. Since their experiments, related semiconductors such as ZnO [203][204][205][206], SnO 2 [207][208][209][210][211], Fe 2 O 3 [212][213][214][215], and STO attracted a lot of interest as photoanodes and were studied extensively throughout the last decades. Among others, STO became one of the best investigated compounds and applications in the field of photocatalytic overall water splitting [216-225], applications for H 2 evolution [226][227][228][229][230][231][232][233][234][235][236][237], CO 2 conversion [238][239][240], inorganic/organic pollutant, NO x , SO x and dye degradation [233,[241][242][243][244][245][246][247][248][249][250][251][252][253][254], N 2 fixation [255], and bacteria ...…”

Section: Materials Advances Accepted Manuscriptmentioning

confidence: 99%

Photoinduced electronic and ionic effects in strontium titanate

et al. 2021

“…In recent decades, photocatalytic technology, as a green and sustainable wastewater treatment technology, has been introduced into water pollution treatment; its unique advantages [7] include a high treatment efficiency, green environmental characteristics and the ability to use renewable solar energy. Therefore, a variety of photocatalytic materials have been developed, such as TiO 2 [8], CdS [9], Bi 2 MoO 6 [10], and perovskite materials [11].…”

Section: Introductionmentioning

confidence: 99%

Efficient Visible-Light-Responsive Ag3PO4/g-C3N4/Hydroxyapatite Photocatalyst (from Oyster Shells) for the Degradation of Methylene Blue: Preparation, Properties and Mechanism

Song

Shang

et al. 2022

Catalysts

A novel ternary Ag3PO4/g-C3N4/hydroxyapatite photocatalyst was prepared, and its morphology, composition and structure were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, high-resolution transmission electron microscopy, and electron spin resonance, etc. The results show that g-C3N4 is evenly dispersed in the interior of hydroxyapatite, forming a homogeneous composite, and significantly improves the band gap structure of the material as a whole. Ag3PO4/g-C3N4/hydroxyapatite has good electron transfer ability and an appropriate energy band structure, which shows that the material has a good degradation effect and stability. Finally, based on the characterization and experimental results, a possible Z-scheme mechanism was proposed, and the active species involved in the reaction are mainly O2− and h+.