Conversion and reducing agent effect on zero valent iron into Fe3O4 for photocatalytic degradation under UV light irradiation

Uji Cemaran Logam Berat Pada Air Minum Isi Ulang Reverse Osmosis Di Wilayah Kabupaten Bantul Dengan Metode Spektrofotometri Visible

“…Single beam instrument dapat digunakan untuk kuantitatif dengan mengukur absorbansi pada panjang gelombang tunggal (Yohan et al 2018). Pengukuran sampel dan larutan blanko atau standar harus dilakukan secara bergantian dengan sel yang sama (Keerthana et al 2022). Spektrofotometer sinar ganda (Double Beam) dapat dipergunakan baik dalam kawasan ultraungu dan cahaya yang terlihat maupun dalam kawasan inframerah (Hanifah et al 2021).…”

Reduction-Assisted Calcination Enhances the Photocatalytic Activity of ZnO and WO3 Nanoparticles in Biomass Conversion

“…In this context, we sought to use sodium borohydride (NaBH 4 ), which is well known for its effective reducing properties and is well recognized for the synthesis of metal nanoparticles via the reduction method. 18,19 Basically, borohydride ions in the presence of transition-metal ions hydrolyze in aqueous solution to generate hydrogen by the following formula in eq 1…”

“…Notably, V O s can afford (i) more electron charge carriers, (ii) metal ion absorption on the material surface, and (iii) changes in the geometrical configuration of oxides. In this context, we sought to use sodium borohydride (NaBH 4 ), which is well known for its effective reducing properties and is well recognized for the synthesis of metal nanoparticles via the reduction method. , Basically, borohydride ions in the presence of transition-metal ions hydrolyze in aqueous solution to generate hydrogen by the following formula in eq BH 4 − + 2 H 2 normalO → BO 2 − + 4 H 2 …”

Sustainable and Green Synthesis of Iron Nanoparticles Supported on Natural Clays via Palm Waste Extract for Catalytic Oxidation of Crocein Orange G Mono Azoic Dye

“…The need for a sustainable and safe water is to develop innovative and economical methods for purification and treatment of wastewater. Diverse physical, chemical, biological, and electrochemical processes have been used to treat these pollutants from wastewater. − One of the main methods for removing these dyes is catalytic degradation. − Advanced oxidation processes (AOPs) are based on the use of radical transition species, such as (HO • ) with high reactivity and no selectivity. , A hydroxyl radical can change harmful pollutant matters into intermediate substances, which can further cause reactions with other oxidizing agents or these radicals and become mineralized as CO 2 , H 2 O, and other organic and inorganic minerals. , The Fenton process is one of the AOPs that is very efficient in degrading a wide range of azo dyes. − It is generally recognized that the homogeneous Fenton process has a number of drawbacks, including the need for additional treatments for sludge and iron ions, the acidity of effluents prior to decontamination, and the neutralization of treated solutions prior to disposal. − To address these issues, heterogeneous Fenton oxidation based on various Fe-based catalysts has been developed in the past few years. , …”

“… 10 − 12 One of the main methods for removing these dyes is catalytic degradation. 13 − 15 Advanced oxidation processes (AOPs) are based on the use of radical transition species, such as (HO • ) with high reactivity and no selectivity. 16 , 17 A hydroxyl radical can change harmful pollutant matters into intermediate substances, which can further cause reactions with other oxidizing agents or these radicals and become mineralized as CO 2 , H 2 O, and other organic and inorganic minerals.…”