Exhaust Hydrocarbon Emission Concentration Level in Abeokuta Metropolis, Ogun State, Nigeria: A Case Study of Commercial Motorcycles (Okada)

Transportation, especially the use of 2-stroke motorcycles has been a key contributor to air pollutants, hydrocarbons and carbon monoxide alike, mostly in the developing countries. High rate of unemployment amongst the teeming youth population in Nigeria have led to the use of differen

Photocatalytic Activity of Green Mixed Matrix Membranes for Degradation of Anionic Dye

Anionic dye is a notable constituent of textile effluent, which renders water unsafe for human and animal use. A notable approach to mitigating effluent is the use of membranes. In this study, a mixed matrix technique was adopted for the preparation of composite membranes. The composite membranes consist of crumb rubber filled with nanoparticles, respectively. The membranes were characterized by Fourier transform spectroscopy, scanning electron microscopy coupled with energy dispersive x-ray, thermogravimetric analyser, and drop shape analyzer. The photocatalytic activities of the mixed matrix membranes were investigated with anionic dye in the UV/visible region. Photocatalytic activity of composite membranes showed high degradation with an apparent rate constant. This study presents a rubber-based membrane for wastewater treatment

Synthesis, Characterization and Photocatalytic activity of silver and zinc codoped TiO2 nanoparticle for photodegradation of methyl orange dye in aqueous solution

In this study, TiO2 nanocrystals, 1 mol% Ag doped and 1 mol% Ag and 0.6 mol% Zn codoped TiO2 powders were synthesized by sol-gel route. Their photocatalytic activities on methyl orange dye under visible irradiation were investigated. The powders were characterized by X-Ray Diffraction (XRD), UV–Visible spectroscopy (UV-Vis), Brunauer–Emmett–Teller (BET) and Fourier Transform Infrared Spectroscopy (FT-IR). The XRD results revealed presence of rutile phase with average crystallite size between 9 and 11 nm. The UV-Vis spectra showed red-shift towards longer wavelength with corresponding decrease in band gap from 2.9 to 2.5 eV. The BET surface areas of the nanoparticles ranged from 4.7 to 11.8 m2g-1 with average pore size between 18.9 and 56.6 nm. The Ag doped TiO2 has the largest surface area of 11.8 m2g-1, while Ag-Zn co-doped TiO2 was found to have the highest pore size and volume. The absorption bands at 750-500 cm-1 were attributed to -O-Ti-O- bond in the TiO2 lattice. The photocatalytic efficiency was highest at optimum pH 4.1 for Ag-Zn codoped TiO2. The results confirmed that Ag doped and Ag-Zn co-doped TiO2 were more effective than pure TiO2. The kinetic data were fitted into pseudo-first-order equation using Langmuir-Hinshelwood kinetic modelThe accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author