A silica-supported iron oxide catalyst capable of activating hydrogen peroxide at neutral pH values.

Environmental Science & Technology
Anh Le-Tuan PhamDavid L Sedlak

Abstract

Iron oxides catalyze the conversion of hydrogen peroxide (H(2)O(2)) into oxidants capable of transforming recalcitrant contaminants. Unfortunately, the process is relatively inefficient at circumneutral pH values because of competing reactions that decompose H(2)O(2) without producing oxidants. Silica- and alumina-containing iron oxides prepared by sol-gel processing of aqueous solutions containing Fe(ClO(4))(3), AlCl(3), and tetraethyl orthosilicate efficiently catalyzed the decomposition of H(2)O(2) into oxidants capable of transforming phenol at circumneutral pH values. Relative to hematite, goethite, and amorphous FeOOH, the silica-iron oxide catalyst exhibited a stoichiometric efficiency, defined as the number of moles of phenol transformed per mole of H(2)O(2) consumed, which was 10-40 times higher than that of the iron oxides. The silica-alumina-iron oxide catalyst had a stoichiometric efficiency that was 50-80 times higher than that of the iron oxides. The significant enhancement in oxidant production is attributable to the interaction of Fe with Al and Si in the mixed oxides, which alters the surface redox processes, favoring the production of strong oxidants during H(2)O(2) decomposition.

References

Mar 7, 2002·Environmental Science & Technology·Bhakti R PetigaraAlice C Mignerey
May 10, 2002·Environmental Science & Technology·Wai P Kwan, Bettina M Voelker
Apr 2, 2003·Environmental Science & Technology·Andreas Voegelin, Stephan J Hug
Apr 12, 2003·Environmental Science & Technology·Wai P Kwan, Bettina M Voelker
Oct 17, 2007·Environmental Science & Technology·Andri Stefánsson
Mar 21, 2008·Environmental Science & Technology·Christina R Keenan, David L Sedlak
Mar 1, 1994·Environmental Science & Technology·J X Ravikumar, M D Gurol

❮ Previous
Next ❯

Citations

Feb 15, 2014·TheScientificWorldJournal·Milena Becelic-TominMiljana Prica
Nov 1, 2015·International Journal of Environmental Research and Public Health·Liang SunAimin Li
Feb 24, 2016·Journal of Environmental Sciences (China)·Xiaofang YangDongsheng Wang
Feb 24, 2016·Journal of Environmental Sciences (China)·Jie HeDongsheng Wang
Mar 29, 2014·Journal of Food and Drug Analysis·Haohao WuY Martin Lo
Oct 18, 2011·Water Research·Zhixi ZhaoShanlin Zhao
Oct 30, 2015·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Long WangLan Ding
Jan 31, 2015·Water Research·Xianfeng HuangBihuang Xie
Apr 15, 2016·Environmental Science and Pollution Research International·Jiankang WangZhaohua Jiang
Jan 18, 2011·Journal of Hazardous Materials·Fei JiLei Deng
May 12, 2016·Environmental Science & Technology·Anett GeorgiFrank-Dieter Kopinke
Nov 1, 2016·Environmental Science and Pollution Research International·Mingjie JinYanwu Zhang
Oct 8, 2015·Chemical Communications : Chem Comm·Leitao ZhangHong Li
Jun 8, 2018·Macromolecular Rapid Communications·Yingying CaiPhilipp Vana
May 1, 2012·Journal of Nanoparticle Research : an Interdisciplinary Forum for Nanoscale Science and Technology·Minghui GuiDibakar Bhattacharyya
Jul 19, 2020·Environmental Science and Pollution Research International·Hongyu ChenZhi Qian
Dec 11, 2019·Polymers·Afiqah AhmadNurNazurah Jiman

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.