Manganese Functionalized Silicate Nanoparticles as a Fenton‐Type Catalyst for Water Purification by Advanced Oxidation Processes (AOP)

Abstract

Wet hydrogen peroxide catalytic oxidation (WHPCO) is one of the most important industrially applicable advanced oxidation processes (AOPs) for the decomposition of organic pollutants in water. It is demonstrated that manganese functionalized silicate nanoparticles with interparticle porosity act as a superior Fenton‐type nanocatalyst in WHPCO as they can decompose 80% of a test organic compound in 30 minutes at neutral pH and room temperature. By using X‐ray absorption spectroscopic techniques it is also shown that the superior activity of the nanocatalyst can be attributed uniquely to framework manganese, which decomposes H2O2 to reactive hydroxyls and, unlike manganese in Mn3O4 or Mn2O3 nanoparticles, does not promote the simultaneous decomposition of hydrogen peroxide. The presented material thus introduces a new family of Fenton nanocatalysts, which are environmentally friendly, cost‐effective, and possess superior efficiency for the decomposition of H2O2 to reactive hydroxyls (AOP), which in turn readily decompose organic pollutants dissolved in water.

Galvanic-like cells produced by negative charge nonuniformity of lattice oxygen on d-TiCuAl–SiO2 nanospheres for enhancement of Fenton-catalytic efficiency

“…10 Therefore, heterogeneous Fenton processes (Fig. S1b, ESI †) are developed to address these problems: 11,12 however, few of them exhibit significant catalytic efficiency at neutral pH values in water, and they typically use a large excess of H 2 O 2 (above the stoichiometric amount by 100-fold) to reach a desirable efficiency of these materials. 13 17,18 or the aromatic products of the pollutants, 16,19 adding UV irradiation, 20 and establishing a precious metal Fenton system to utilize phenol.…”

Çevre dostu atıksu arıtımı yöntemleri ile mikrokirletici giderimi kinetiğinin incelenmesi: LaFeO3 perovskit tipi katalizör varlığında metilen mavisinin Fenton benzeri oksidasyonu

“…Tušar vd. 2012'te yayımladıkları çalışmada mangan içeren silikat nanopartikül Fenton benzeri katalizörleri ile 50 ppm metilen mavisi çözeltisini arıtmak için 0,4 g/L katalizör kullanmışlardır [15].…”

Synthesis of Magnetic Carbon Supported Manganese Catalysts for Phenol Oxidation by Activation of Peroxymonosulfate

“…Due to their strong toxicity even at low concentration [3], development of efficient treatment technologies is in urgent demand. Advanced oxidation processes (AOPs) involving Fenton reaction, photocatalysis, electrocatalysis and various chemical methods have attracted intensive research interests for decomposing the organic contaminants due to their high efficiency and complete degradation capability [4]. Previous investigations have demonstrated that Fenton/Fenton-like reactions utilizing hydroxyl radicals (OH·) could decompose organic contaminants efficiently [5,6].…”