Enhanced photoactivity of graphene/titanium dioxide nanotubes for removal of Acetaminophen

Tao, Hong; Liang, Xiao; Zhang, Qian; Chang, Chang-Tang

doi:10.1016/j.apsusc.2014.10.129

Cited by 100 publications

(26 citation statements)

References 39 publications

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“…Additionally, N ‐(2,4‐dihydroxyphenyl) acetamide formed by the hydroxyl radical attacked the aromatic ring and then transformed into other ring‐opening products, such as N ‐(formylmethyl)acetamide and butan‐2‐ol. These aromatics are the basic structures of APAP, suggesting that the degradation of APAP was mainly caused by the attack of the radicals on the ortho and para positions of aromatic ring . The intermediates were similar to those obtained in other studies …”

Section: Resultssupporting

confidence: 86%

Structurally modified CuFe₂O₄/persulfate process for acetaminophen scavenging: high efficiency with low catalyst addition

Zhang

Dong

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND: Iron (Fe)-copper (Cu) bimetallic catalysts such as CuFe 2 O 4 , CuFeO 2 and CuO/Fe 3 O 4 have been widely applied in persulfate oxidization process. Among these catalysts, CuFe 2 O 4 has shown excellent performance in catalyzing peroxymonosulfate. However, because the catalytic effect of CuFe 2 O 4 on persulfate (PS) is not obvious, the application of CuFe 2 O 4 to activate persulfate has been investigated only rarely. Hence, structural modification has been applied in order to improve the catalytic activity of CuFe 2 O 4 on persulfate.RESULT: In this study, Oxygen (O)-deficient CuFe 2 O 4 was synthesized via the hydrogen reduction method and first used to activate PS for degrading acetaminophen (APAP) in aqueous solution with low catalyst concentration of 0.3 g L −1 . Results reveal that high-concentration APAP (100 mg L −1 ) could be efficiently removed by O-deficient CuFe 2 O 4 -activated PS, and 91% removal rate could be reached in 60 min using 0.8 g L −1 PS and 0.3 g L −1 catalyst under unadjusted pH. Dissolved O 2 and Cl − showed inhibitory effects on the degradation process. Radical scavenger experiments, in which methanol, tert-butyl alcohol (TBA) and nitrobenzene (NB) were used as radical trappers, indicated that SO 4 − and OH were the active radicals in the reaction, but the main radical was SO 4 − . Oxygen-deficient CuFe 2 O 4 showed strong reduction ability and could activate PS efficiently, and the electron transfer capability was remarkably enhanced after this structural modification. CONCLUSIONS: Results indicated that compared to the pristine crystal, the catalytic activity of CuFe 2 O 4 could be improved through structural modification. Additionally, the structurally modified catalyst showed high potential to treat wastewater with high antibiotic content under mild conditions. Romero A. Oxidation of priority and emerging pollutants with persulfate activated by iron: effect of iron valence and particle size. Chem Eng J 318:197-205 (2017).J Chem Technol Biotechnol 2019; 94: 785-794

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Section: Resultssupporting

confidence: 86%

Structurally modified CuFe₂O₄/persulfate process for acetaminophen scavenging: high efficiency with low catalyst addition

Zhang

Dong

et al. 2018

J of Chemical Tech & Biotech

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“…The symmetry can also be broken along the c axis by stacking two graphene layers in Bernal stacking, leading to the formation of an energy gap between low‐energy bands at the former Dirac crossing point for bilayer graphene . More importantly, the unique high‐quality 2D hexagonal honeycomb lattice of graphene provides a versatile platform to coupling with various nanostructured semiconductors, such as 0D quantum dots (QDs), 1D nanorods/nanowires, 2D nanosheets, and 3D porous structures, thus favoring an integrated multi‐function modification of graphene‐based composite photocatalysts …”

Section: Photocatalysis‐related Properties Of Graphene and Its Derivamentioning

confidence: 99%

Graphene in Photocatalysis: A Review

Wageh

et al. 2016

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In recent years, heterogeneous photocatalysis has received much research interest because of its powerful potential applications in tackling many important energy and environmental challenges at a global level in an economically sustainable manner. Due to their unique optical, electrical, and physicochemical properties, various 2D graphene nanosheets-supported semiconductor composite photocatalysts have been widely constructed and applied in different photocatalytic fields. In this review, fundamental mechanisms of heterogeneous photocatalysis, including thermodynamic and kinetics requirements, are first systematically summarized. Then, the photocatalysis-related properties of graphene and its derivatives, and design rules and synthesis methods of graphene-based composites are highlighted. Importantly, different design strategies, including doping and sensitization of semiconductors by graphene, improving electrical conductivity of graphene, increasing eloectrocatalytic active sites on graphene, strengthening interface coupling between semiconductors and graphene, fabricating micro/nano architectures, constructing multi-junction nanocomposites, enhancing photostability of semiconductors, and utilizing the synergistic effect of various modification strategies, are thoroughly summarized. The important applications including photocatalytic pollutant degradation, H production, and CO reduction are also addressed. Through reviewing the significant advances on this topic, it may provide new opportunities for designing highly efficient 2D graphene-based photocatalysts for various applications in photocatalysis and other fields, such as solar cells, thermal catalysis, separation, and purification.

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“…The results showed that the degradation was approximately 62% after 70 min, which represented an increase of more than 80% over that of plain TiO 2 is due to the transfer of electrons between CNTs and TiO 2 . Using TiO 2 and graphite oxide as starting materials Tao et al [145] have prepared titanium dioxide nanotube and graphene (GR-TNT) nanocomposites through a hydrothermal method. This nanocomposites with different weight ratios were used to decompose acetaminophen.…”

Section: Metal Sulphide Photocatalystmentioning

confidence: 99%

“…Degradation of Acetaminophen [145] 9. g-C 3 N 4 /Ag 2 CO 3 hybrid photocatalyst In situ precipitation method Decomposition of methyl orange dye [141] 10.…”

Section: Ethanolmentioning

confidence: 99%

Review on the photocatalytic activity of various composite catalysts

Sudha¹,

Palanisamy²

2015

Chemical Engineering and Processing: Process Intensification

241

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Enhanced photoactivity of graphene/titanium dioxide nanotubes for removal of Acetaminophen

Cited by 100 publications

References 39 publications

Structurally modified CuFe₂O₄/persulfate process for acetaminophen scavenging: high efficiency with low catalyst addition

Structurally modified CuFe₂O₄/persulfate process for acetaminophen scavenging: high efficiency with low catalyst addition

Graphene in Photocatalysis: A Review

Review on the photocatalytic activity of various composite catalysts

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Enhanced photoactivity of graphene/titanium dioxide nanotubes for removal of Acetaminophen

Cited by 100 publications

References 39 publications

Structurally modified CuFe2O4/persulfate process for acetaminophen scavenging: high efficiency with low catalyst addition

Structurally modified CuFe2O4/persulfate process for acetaminophen scavenging: high efficiency with low catalyst addition

Graphene in Photocatalysis: A Review

Review on the photocatalytic activity of various composite catalysts

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Product

Resources

About

Structurally modified CuFe₂O₄/persulfate process for acetaminophen scavenging: high efficiency with low catalyst addition

Structurally modified CuFe₂O₄/persulfate process for acetaminophen scavenging: high efficiency with low catalyst addition