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Bimetallic Au-Pd nanoparticles on 2D supported graphitic carbon nitride and reduced graphene oxide sheets: A comparative photocatalytic degradation study of organic pollutants in water.
Chemosphere. 2018 Apr; 197:817-829.C

Abstract

Novel and sustainable bimetallic nanoparticles of Au-Pd on 2D graphitic carbon nitride (g-C3N4) and reduced graphene oxide (rGO) sheets was designed adopting an eco-friendly chemical route to obtain Au-Pd/g-C3N4 and Au-Pd/rGO, respectively. Elimination of hazardous pollutants, particularly phenol from water is urgent for environment remediation due to its significant carcinogenicity. Considering this aspect, the Au-Pd/g-C3N4 and Au-Pd/rGO nanocomposites are used as photocatalyst towards degradation of toxic phenol, 2-chlorophenol (2-CP) and 2-nitrophenol (2-NP) under natural sunlight and UV light irradiation. Au-Pd/g-C3N4 nanocomposite exhibited higher activity then Au/g-C3N4, Pd/g-C3N4 and Au-Pd/rGO nanocomposites with more than 95% degradation in 180 min under sunlight. The obtained degradation efficiency of our materials is better than many other reported photocatalysts. Incorporation of nitrogen atoms in the carbon skeleton of g-C3N4 provides much better properties to Au-Pd/g-C3N4 nanocomposite than carbon based Au-Pd/rGO leading to its higher degradation efficiency. Due to the presence of these nitrogen atoms and some defects, g-C3N4 possesses appealing electrical, chemical and functional properties. Photoluminescence results further revealed the efficient charge separation and delayed recombination of photo-induced electron-hole pairs in the Au-Pd/g-C3N4 nanocomposite. Generation of reactive oxygen species during photocatalysis is well explained through photoluminescence study and the sustainability of these photocatalyst was ascertained through reusability study up to eight and five consecutive cycles for Au-Pd/g-C3N4 and Au-Pd/rGO nanocomposites, respectively without substantial loss in its activity. Characterization of the photocatalysts after reaction signified the stability of the nanocomposites and added advantage to our developed photocatalytic system.

Authors+Show Affiliations

Advanced Materials Group, Materials Sciences and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, India; Academy of Scientific and Innovative Research, CSIR-NEIST Campus, India.Advanced Materials Group, Materials Sciences and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, India; Academy of Scientific and Innovative Research, CSIR-NEIST Campus, India. Electronic address: mnshrdas@yahoo.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29407845

Citation

Darabdhara, Gitashree, and Manash R. Das. "Bimetallic Au-Pd Nanoparticles On 2D Supported Graphitic Carbon Nitride and Reduced Graphene Oxide Sheets: a Comparative Photocatalytic Degradation Study of Organic Pollutants in Water." Chemosphere, vol. 197, 2018, pp. 817-829.
Darabdhara G, Das MR. Bimetallic Au-Pd nanoparticles on 2D supported graphitic carbon nitride and reduced graphene oxide sheets: A comparative photocatalytic degradation study of organic pollutants in water. Chemosphere. 2018;197:817-829.
Darabdhara, G., & Das, M. R. (2018). Bimetallic Au-Pd nanoparticles on 2D supported graphitic carbon nitride and reduced graphene oxide sheets: A comparative photocatalytic degradation study of organic pollutants in water. Chemosphere, 197, 817-829. https://doi.org/10.1016/j.chemosphere.2018.01.073
Darabdhara G, Das MR. Bimetallic Au-Pd Nanoparticles On 2D Supported Graphitic Carbon Nitride and Reduced Graphene Oxide Sheets: a Comparative Photocatalytic Degradation Study of Organic Pollutants in Water. Chemosphere. 2018;197:817-829. PubMed PMID: 29407845.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Bimetallic Au-Pd nanoparticles on 2D supported graphitic carbon nitride and reduced graphene oxide sheets: A comparative photocatalytic degradation study of organic pollutants in water. AU - Darabdhara,Gitashree, AU - Das,Manash R, Y1 - 2018/02/03/ PY - 2017/09/02/received PY - 2017/12/13/revised PY - 2018/01/15/accepted PY - 2018/2/7/pubmed PY - 2018/6/14/medline PY - 2018/2/7/entrez KW - Au-Pd bimetallic nanoparticle KW - Graphitic carbon nitride KW - Phenolic compound KW - Photocatalytic degradation KW - Reduced graphene oxide SP - 817 EP - 829 JF - Chemosphere JO - Chemosphere VL - 197 N2 - Novel and sustainable bimetallic nanoparticles of Au-Pd on 2D graphitic carbon nitride (g-C3N4) and reduced graphene oxide (rGO) sheets was designed adopting an eco-friendly chemical route to obtain Au-Pd/g-C3N4 and Au-Pd/rGO, respectively. Elimination of hazardous pollutants, particularly phenol from water is urgent for environment remediation due to its significant carcinogenicity. Considering this aspect, the Au-Pd/g-C3N4 and Au-Pd/rGO nanocomposites are used as photocatalyst towards degradation of toxic phenol, 2-chlorophenol (2-CP) and 2-nitrophenol (2-NP) under natural sunlight and UV light irradiation. Au-Pd/g-C3N4 nanocomposite exhibited higher activity then Au/g-C3N4, Pd/g-C3N4 and Au-Pd/rGO nanocomposites with more than 95% degradation in 180 min under sunlight. The obtained degradation efficiency of our materials is better than many other reported photocatalysts. Incorporation of nitrogen atoms in the carbon skeleton of g-C3N4 provides much better properties to Au-Pd/g-C3N4 nanocomposite than carbon based Au-Pd/rGO leading to its higher degradation efficiency. Due to the presence of these nitrogen atoms and some defects, g-C3N4 possesses appealing electrical, chemical and functional properties. Photoluminescence results further revealed the efficient charge separation and delayed recombination of photo-induced electron-hole pairs in the Au-Pd/g-C3N4 nanocomposite. Generation of reactive oxygen species during photocatalysis is well explained through photoluminescence study and the sustainability of these photocatalyst was ascertained through reusability study up to eight and five consecutive cycles for Au-Pd/g-C3N4 and Au-Pd/rGO nanocomposites, respectively without substantial loss in its activity. Characterization of the photocatalysts after reaction signified the stability of the nanocomposites and added advantage to our developed photocatalytic system. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/29407845/Bimetallic_Au_Pd_nanoparticles_on_2D_supported_graphitic_carbon_nitride_and_reduced_graphene_oxide_sheets:_A_comparative_photocatalytic_degradation_study_of_organic_pollutants_in_water_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(18)30081-X DB - PRIME DP - Unbound Medicine ER -