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Article ; Online: Graphene-based strontium niobate-zinc oxide heterojunction photocatalyst for effective reduction of hexavalent chromium.

Raja, Annamalai / Son, Namgyu / Kang, Misook

2023 Volume 331, Page(s) 138781

Abstract: A hydrothermal technique was employed to synthesize a ... ...

Abstract	A hydrothermal technique was employed to synthesize a Sr
MeSH term(s)	Zinc Oxide/chemistry ; Graphite/chemistry ; Zinc ; Oxidation-Reduction ; Chromium/chemistry ; Organic Chemicals
Chemical Substances	Zinc Oxide (SOI2LOH54Z) ; graphene oxide ; Graphite (7782-42-5) ; Zinc (J41CSQ7QDS) ; chromium hexavalent ion (18540-29-9) ; Chromium (0R0008Q3JB) ; Organic Chemicals
Language	English
Publishing date	2023-04-27
Publishing country	England
Document type	Journal Article
ZDB-ID	120089-6
ISSN	1879-1298 ; 0045-6535 ; 0366-7111
ISSN (online)	1879-1298
ISSN	0045-6535 ; 0366-7111
DOI	10.1016/j.chemosphere.2023.138781
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Article ; Online: Hybrid ternary NiCoCu layered double hydroxide electrocatalyst for alkaline hydrogen and oxygen evolution reaction.

Raja, Annamalai / Son, Namgyu / Kim, Young-Il / Kang, Misook

Journal of colloid and interface science

2023 Volume 647, Page(s) 104–114

Abstract: This study focuses on the electrochemical properties of layered double hydroxide (LDH), which is a specific structure of NiCoCu LDH, and the active species therein, rather than the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) of ... ...

Abstract	This study focuses on the electrochemical properties of layered double hydroxide (LDH), which is a specific structure of NiCoCu LDH, and the active species therein, rather than the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) of ternary NiCoCu LDH materials. Six types of catalysts were synthesized using the reflux condenser method and coated onto a nickel foam support electrode. Compared to bare, binary, and ternary electrocatalysts, the NiCoCu LDH electrocatalyst exhibited higher stability. The double layer capacitance (Cdl) of the NiCoCu LDH (12.3 mF cm
Language	English
Publishing date	2023-05-19
Publishing country	United States
Document type	Journal Article
ZDB-ID	241597-5
ISSN	1095-7103 ; 0021-9797
ISSN (online)	1095-7103
ISSN	0021-9797
DOI	10.1016/j.jcis.2023.05.089
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Article ; Online: CuS/Ag

Mandari, Kotesh Kumar / Son, Namgyu / Kang, Misook

Journal of colloid and interface science

2022 Volume 615, Page(s) 740–751

Abstract: Ternary heterostructures play a crucial role in improving the separation of charge carriers and fast surface reaction kinetics, which in turn helps in understanding the effective photocatalytic water splitting performance. Herein, CuS/ ... ...

Abstract	Ternary heterostructures play a crucial role in improving the separation of charge carriers and fast surface reaction kinetics, which in turn helps in understanding the effective photocatalytic water splitting performance. Herein, CuS/Ag
Language	English
Publishing date	2022-02-08
Publishing country	United States
Document type	Journal Article
ZDB-ID	241597-5
ISSN	1095-7103 ; 0021-9797
ISSN (online)	1095-7103
ISSN	0021-9797
DOI	10.1016/j.jcis.2022.02.025
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Article ; Online: Synergistic sorption performance of karaya gum crosslink poly(acrylamide-co-acrylonitrile) @ metal nanoparticle for organic pollutants.

Pandey, Sadanand / Son, Namgyu / Kang, Misook

International journal of biological macromolecules

2022 Volume 210, Page(s) 300–314

Abstract: In this work, we tailor facile hydrogels nanocomposite (HNC) based on sustainable karaya gum for water treatment. Karaya gum crosslink poly(acrylamide-co-acrylonitrile) @ silver nanoparticle (KG-cl-P(AAm-co-AN)@AgNPs) HNC were made by an aqueous free ... ...

Abstract	In this work, we tailor facile hydrogels nanocomposite (HNC) based on sustainable karaya gum for water treatment. Karaya gum crosslink poly(acrylamide-co-acrylonitrile) @ silver nanoparticle (KG-cl-P(AAm-co-AN)@AgNPs) HNC were made by an aqueous free radical in situ crosslink copolymerization of acrylamide (AAm) and acrylic acid (AA) in aqueous solution of KG-stabilized AgNPs. FTIR, XRD, DTA-TGA, SEM, and TEM were used to characterize HNC. The hydrogels' swelling, diffusion, and network characteristics were investigated. The removal efficiency of HNC was found to be 99% at pH 8 for a crystal violet (CV), dose of 0.02 g after 1 h. Dye adsorption by these hydrogels was also investigated in terms of isotherms, and kinetics. The dye's exceptionally high adsorption capacity on HNC for CV removal is explained by H-bonding interactions, as well as dipole-dipole and electrostatic interactions between anionic adsorbent and cationic dye molecules (Qmax, 1000 mg/g). The HNC can be regenerated with 0.1 M HCl and reused at least 10 times maintaining over 68% dye removal. The loading of AgNPs into the polymeric matrix of KG-cl-P(AAm-co-AN) significantly increases the removal percentage of CV dye from its aqueous solution, according to this study.
MeSH term(s)	Acrylamides/chemistry ; Acrylonitrile ; Adsorption ; Environmental Pollutants ; Gentian Violet ; Hydrogels/chemistry ; Hydrogen-Ion Concentration ; Karaya Gum ; Kinetics ; Metal Nanoparticles ; Silver ; Water Pollutants, Chemical/chemistry
Chemical Substances	Acrylamides ; Environmental Pollutants ; Hydrogels ; Water Pollutants, Chemical ; Silver (3M4G523W1G) ; Karaya Gum (9000-36-6) ; Gentian Violet (J4Z741D6O5) ; Acrylonitrile (MP1U0D42PE)
Language	English
Publishing date	2022-05-07
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	282732-3
ISSN	1879-0003 ; 0141-8130
ISSN (online)	1879-0003
ISSN	0141-8130
DOI	10.1016/j.ijbiomac.2022.05.019
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Band structure alignment transitioning strategy for the fabrication of efficient photocatalysts for solar fuel generation and environmental remediation applications.

Chava, Rama Krishna / Son, Namgyu / Kang, Misook

Journal of colloid and interface science

2022 Volume 627, Page(s) 247–260

Abstract: Indium hydroxide (In(OH) ...

Abstract	Indium hydroxide (In(OH)
MeSH term(s)	Environmental Pollutants ; Environmental Restoration and Remediation ; Hydrogen/chemistry ; Indium/chemistry ; Sulfides/chemistry ; Tetracycline ; Water/chemistry
Chemical Substances	Environmental Pollutants ; Sulfides ; Indium (045A6V3VFX) ; Water (059QF0KO0R) ; indium oxide (4OO9KME22D) ; Hydrogen (7YNJ3PO35Z) ; Tetracycline (F8VB5M810T)
Language	English
Publishing date	2022-07-08
Publishing country	United States
Document type	Journal Article
ZDB-ID	241597-5
ISSN	1095-7103 ; 0021-9797
ISSN (online)	1095-7103
ISSN	0021-9797
DOI	10.1016/j.jcis.2022.07.031
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Bismuth quantum dots anchored one-dimensional CdS as plasmonic photocatalyst for pharmaceutical tetracycline hydrochloride pollutant degradation.

Chava, Rama Krishna / Son, Namgyu / Kang, Misook

Chemosphere

2022 Volume 300, Page(s) 134570

Abstract: Earth abundant metal based plasmonic photocatalysis is one of the most proficient approaches to degrade the emergent organic pollutants in contaminated water. Here, we report that using one-dimensional CdS/zero-dimensional Bi quantum dot (QD) ... ...

Abstract	Earth abundant metal based plasmonic photocatalysis is one of the most proficient approaches to degrade the emergent organic pollutants in contaminated water. Here, we report that using one-dimensional CdS/zero-dimensional Bi quantum dot (QD) heterostructures (1D/0D CdS/Bi HSs) were obtained via a simple solvothermal reaction. The results specified that the Bi QDs were grown onto CdS NRs through the reduction of Bi
MeSH term(s)	Anti-Bacterial Agents ; Bismuth/chemistry ; Catalysis ; Environmental Pollutants ; Pharmaceutical Preparations ; Quantum Dots ; Tetracycline
Chemical Substances	Anti-Bacterial Agents ; Environmental Pollutants ; Pharmaceutical Preparations ; Tetracycline (F8VB5M810T) ; Bismuth (U015TT5I8H)
Language	English
Publishing date	2022-04-11
Publishing country	England
Document type	Journal Article
ZDB-ID	120089-6
ISSN	1879-1298 ; 0045-6535 ; 0366-7111
ISSN (online)	1879-1298
ISSN	0045-6535 ; 0366-7111
DOI	10.1016/j.chemosphere.2022.134570
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Band structure alignment transitioning strategy for the fabrication of efficient photocatalysts for solar fuel generation and environmental remediation applications

Chava, Rama Krishna / Son, Namgyu / Kang, Misook

Journal of colloid and interface science. 2022 Dec., v. 627

2022

Abstract: Indium hydroxide (In(OH)₃) and indium oxide (In₂O₃) have proven to be efficient catalysts for photocatalytic water-splitting reactions to produce hydrogen (H₂) and for organic pollutant degradation applications. However, the limited optical absorption ... ...

Abstract	Indium hydroxide (In(OH)₃) and indium oxide (In₂O₃) have proven to be efficient catalysts for photocatalytic water-splitting reactions to produce hydrogen (H₂) and for organic pollutant degradation applications. However, the limited optical absorption features of indium-based nanostructures have restricted their practical applications. In this study, we have successfully designed indium hydroxide- and indium oxide-loaded metal sulfide (cadmium sulfide, CdS) heterostructures as excellent photocatalytic systems for photocatalytic hydrogen evolution and tetracycline hydrochloride pollutant degradation reactions. In this system, In(OH)₃ and In₂O₃ established Type-I and S-scheme heterojunctions, respectively, with CdS, resulting in superior charge separation properties and outstanding photocatalytic activity. Specifically, the rational and appropriate design of the aforementioned indium-based heterostructures promoted the separation of photoexcited charge carriers via Type-I and S-scheme paths. Accordingly, enhanced photocatalytic H₂ evolution activities of 9.58 and 14.98 mmol·g⁻¹·h⁻¹ were achieved for CdS–In(OH)₃ and CdS–In₂O₃, respectively. Furthermore, the highest degradation efficiency of CdS–In₂O₃ was ∼ 90%, which was higher than those of CdS–In(OH)₃ (72%) and bare CdS nanorods (51%). Therefore, the results of this study provide an opportunity to enhance the catalytic activities of heterostructured photocatalytic systems by utilizing the strategy of transitioning band structure alignment from the Type-I to the S-scheme.
Keywords	absorption ; cadmium sulfide ; hydrogen ; hydrogen production ; indium ; nanorods ; photocatalysis ; photocatalysts ; pollutants ; remediation ; solar energy ; tetracycline
Language	English
Dates of publication	2022-12
Size	p. 247-260.
Publishing place	Elsevier Inc.
Document type	Article
ZDB-ID	241597-5
ISSN	1095-7103 ; 0021-9797
ISSN (online)	1095-7103
ISSN	0021-9797
DOI	10.1016/j.jcis.2022.07.031
Database	NAL-Catalogue (AGRICOLA)

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Article: CuS/Ag2O nanoparticles on ultrathin g-C3N4 nanosheets to achieve high performance solar hydrogen evolution

Mandari, Kotesh Kumar / Son, Namgyu / Kang, Misook

Journal of colloid and interface science. 2022 June, v. 615

2022

Abstract	Ternary heterostructures play a crucial role in improving the separation of charge carriers and fast surface reaction kinetics, which in turn helps in understanding the effective photocatalytic water splitting performance. Herein, CuS/Ag₂O nanoparticles were presented on a graphitic carbon nitride (g-C₃N₄) surface to obtain CuS/Ag₂O/g-C₃N₄ material using facile hydrothermal and precipitation methods. Structural and morphological studies confirmed the presence of ternary nanostructures comprising CuS, Ag₂O, and g-C₃N₄ with nanoparticle and nanosheet morphologies. The as-synthesized CuS/Ag₂O/g-C₃N₄ exhibited a remarkable photocatalytic H₂ production of 1752 µmol.h⁻¹.g⁻¹cₐₜ, which is considerably superior than those of CuS and g-C₃N₄. The improved H₂ production performance which is due to the effective interfacial CuS/Ag₂O/g-C₃N₄ heterojunction interface and superior hole (h⁺) trapping capability of the CuS at the CuS/Ag₂O/g-C₃N₄ interface. This can efficiently enhance the lifetime of photoexcited charge carriers and enhance the electron density for the production of H₂. The optimum CuS/Ag₂O/g-C₃N₄ heterostructure remained stable after 8 successive experimental cycles, although with a slight change in the H₂ production rate. Therefore, this study offers a novel approach to exploit the efficacy through the synergetic effect of integrating CuS as the photocatalyst and Ag₂O as the visible sensitizer, thus proposing a viable strategy of using earth-abundant material to enhance the conversion of solar energy to fuel.
Keywords	carbon nitride ; graphene ; hydrogen production ; nanosheets ; photocatalysis ; photocatalysts ; reaction kinetics ; solar energy ; synergism
Language	English
Dates of publication	2022-06
Size	p. 740-751.
Publishing place	Elsevier Inc.
Document type	Article
ZDB-ID	241597-5
ISSN	1095-7103 ; 0021-9797
ISSN (online)	1095-7103
ISSN	0021-9797
DOI	10.1016/j.jcis.2022.02.025
Database	NAL-Catalogue (AGRICOLA)

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Article: Bismuth quantum dots anchored one-dimensional CdS as plasmonic photocatalyst for pharmaceutical tetracycline hydrochloride pollutant degradation

Chava, Rama Krishna / Son, Namgyu / Kang, Misook

Chemosphere. 2022 Aug., v. 300

2022

Abstract	Earth abundant metal based plasmonic photocatalysis is one of the most proficient approaches to degrade the emergent organic pollutants in contaminated water. Here, we report that using one-dimensional CdS/zero-dimensional Bi quantum dot (QD) heterostructures (1D/0D CdS/Bi HSs) were obtained via a simple solvothermal reaction. The results specified that the Bi QDs were grown onto CdS NRs through the reduction of Bi³⁺ ions. The Bi modified CdS HSs were employed as a photocatalyst for pharmaceutical pollutant tetracycline degradation and the optimized sample showed the maximum photocatalytic degradation activity of 90% under visible light radiation within 60 min, which is greater than the pure CdS (52%) under identical conditions. Based on the structural characterizations and degradation efficiency, the obtained CdS/Bi is a promising photocatalyst for the treatment of wastewater which contains emerging pollutants such as organic dyes and pharmaceutical antibiotics during the industrial processes. The boosted photocatalytic degradation efficiency is credited to the doped Bi³⁺ species; surface plasmon resonance effect that raised from metallic Bi QDs and proficient photoinduced charge carriers separation.
Keywords	bismuth ; light ; photocatalysis ; photocatalysts ; pollutants ; quantum dots ; surface plasmon resonance ; tetracycline ; wastewater treatment ; water pollution
Language	English
Dates of publication	2022-08
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	120089-6
ISSN	1879-1298 ; 0045-6535 ; 0366-7111
ISSN (online)	1879-1298
ISSN	0045-6535 ; 0366-7111
DOI	10.1016/j.chemosphere.2022.134570
Database	NAL-Catalogue (AGRICOLA)

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Article: Synergistic effects of Tin sulfide Nitrogen-doped titania Nanobelt-Modified graphitic carbon nitride nanosheets with outstanding photocatalytic activity

Mandari, Kotesh Kumar / Son, Namgyu / Kang, Misook

Journal of colloid and interface science. 2022 Jan. 15, v. 606

2022

Abstract: Designing efficient ternary nanostructures is a feasible approach for energy production under simulated solar irradiation. In this study, excellent photoexcited charge carrier separation and enhanced visible-light response were achieved with nitrogen- ... ...

Abstract	Designing efficient ternary nanostructures is a feasible approach for energy production under simulated solar irradiation. In this study, excellent photoexcited charge carrier separation and enhanced visible-light response were achieved with nitrogen-doped titania nanobelts (N-TNBs), whose 1D geometry facilitated the fabrication of a heterostructure with SnS₂ on the surface of graphitic carbon nitride (g-C₃N₄). We established the design of SnS₂@N-TNB and SnS₂@N-TNB/g-C₃N₄ heterostructures by in situ hydrothermal and ultrasonication processes, and achieved commendable simulated solar light driven photocatalytic H₂ generation. UV–vis diffuse reflectance spectroscopy analysis revealed a red shift in the absorption spectra of the SnS₂@N-TNB and SnS₂@N-TNB/g-C₃N₄ samples. The H₂ produced via SnS₂@N-TNB-10/g-C₃N₄ (6730.8 µmol/g/h) was 2.6 times higher than that produced by SnS₂@N-TNB (2515.1 µmol/g/h), and 299 times higher than that produced by N-TNB (22.5 µmol/g/h). The improved photocatalytic H₂ production was attributed to the maximum interface contact between SnS₂@N-TNB and g-C₃N₄, and to the improved visible-light absorption and effective charge-carrier separation. Therefore, the present study provides novel insights for combining the advantages of ternary materials to improve the conversion of solar energy to H₂ fuel.
Keywords	absorption ; carbon nitride ; energy ; geometry ; graphene ; light ; lighting ; nanosheets ; photocatalysis ; reflectance spectroscopy ; solar energy ; solar radiation ; sulfides ; tin ; titanium dioxide ; ultrasonic treatment
Language	English
Dates of publication	2022-0115
Size	p. 1767-1778.
Publishing place	Elsevier Inc.
Document type	Article
ZDB-ID	241597-5
ISSN	1095-7103 ; 0021-9797
ISSN (online)	1095-7103
ISSN	0021-9797
DOI	10.1016/j.jcis.2021.08.120
Database	NAL-Catalogue (AGRICOLA)

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