151
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Bhati VS, Takhar V, Raliya R, Kumar M, Banerjee R. Recent advances in g-C3N4 based gas sensors for the detection of toxic and flammable gases: a review. NANO EXPRESS 2021. [DOI: 10.1088/2632-959x/ac477b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
In recent years, many 2D nanomaterials like graphene, MoS2, phosphorene, and metal oxide nanosheets have been investigated for gas sensing applications due to their excellent properties. Amongst other 2D nanomaterials, graphitic carbon nitride (g-C3N4) has attracted significant attention owing to its simple synthesis process, tunable electronic properties, and exceptional physicochemical properties. Such remarkable properties assert g-C3N4 as a potential candidate for the next-generation high-performance gas sensors employed in the detection of toxic and flammable gases. Although several articles and reviews are available on g-C3N4 for their synthesis, functionalities, and applications for the detection of humidity. Few of them has focused their attention on gas sensing using g-C3N4. Thus, in this review, we have methodically summed up the recent advances in g-C3N4 and its composites-based gas sensor for the detection of toxic and flammable gases. Moreover, we have also incorporated the synthesis strategies and the comprehensive physics of g-C3N4 based gas sensors. Additionally, different approaches are presented for the enhancement of gas sensing/detecting properties of g-C3N4 based gas sensors. Finally, the challenges and future scope of g-C3N4 based gas sensors for real-time monitoring of gases have been discussed.
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152
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Schäfer T, Gallo A, Irmler A, Hummel F, Grüneis A. Surface science using coupled cluster theory via local Wannier functions and in-RPA-embedding: The case of water on graphitic carbon nitride. J Chem Phys 2021; 155:244103. [PMID: 34972356 DOI: 10.1063/5.0074936] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A first-principles study of the adsorption of a single water molecule on a layer of graphitic carbon nitride is reported employing an embedding approach for many-electron correlation methods. To this end, a plane-wave based implementation to obtain intrinsic atomic orbitals and Wannier functions for arbitrary localization potentials is presented. In our embedding scheme, the localized occupied orbitals allow for a separate treatment of short-range and long-range correlation contributions to the adsorption energy by a fragmentation of the simulation cell. In combination with unoccupied natural orbitals, the coupled cluster ansatz with single, double, and perturbative triple particle-hole excitation operators is used to capture the correlation in local fragments centered around the adsorption process. For the long-range correlation, a seamless embedding into the random phase approximation yields rapidly convergent adsorption energies with respect to the local fragment size. Convergence of computed binding energies with respect to the virtual orbital basis set is achieved employing a number of recently developed techniques. Moreover, we discuss fragment size convergence for a range of approximate many-electron perturbation theories. The obtained benchmark results are compared to a number of density functional calculations.
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Affiliation(s)
- Tobias Schäfer
- Institute for Theoretical Physics, TU Wien, Wiedner Hauptstraße 8-10/136, A-1040 Vienna, Austria
| | - Alejandro Gallo
- Institute for Theoretical Physics, TU Wien, Wiedner Hauptstraße 8-10/136, A-1040 Vienna, Austria
| | - Andreas Irmler
- Institute for Theoretical Physics, TU Wien, Wiedner Hauptstraße 8-10/136, A-1040 Vienna, Austria
| | - Felix Hummel
- Institute for Theoretical Physics, TU Wien, Wiedner Hauptstraße 8-10/136, A-1040 Vienna, Austria
| | - Andreas Grüneis
- Institute for Theoretical Physics, TU Wien, Wiedner Hauptstraße 8-10/136, A-1040 Vienna, Austria
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153
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A Comparative Study of the Effect of Graphene Oxide, Graphitic Carbon Nitride, and Their Composite on the Photocatalytic Activity of Cu3SnS4. Catalysts 2021. [DOI: 10.3390/catal12010014] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Photocatalysis has shown high potential in dealing with the ever-broadening problem of wastewater treatment, escalated by the increasing level of recalcitrant chemicals often referred to as emerging contaminants. In this study, the effect of support material on the photocatalytic activity of copper tin sulfide (Cu3SnS4) nanoparticles for the degradation of tetracycline as an emerging contaminant is presented. Graphene oxide, protonated graphitic carbon nitride, and a composite of graphitic carbon nitride and graphene oxide were explored as support materials for Cu3SnS4 nanoparticles. The nanoparticles were incorporated with the different carbonaceous substrates to afford graphene-supported Cu3SnS4 (GO-CTS), protonated graphitic carbon nitride-supported Cu3SnS4 (PCN-CTS), and graphene oxide/protonated graphitic carbon nitride-supported Cu3SnS4 (GO/PCN-CTS). Physicochemical, structural, and optical properties of the prepared nanocomposites were characterized using techniques such as Fourier transform infra-red spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-Vis near infrared, and fluorescence spectrophotometry. The compositing of the Cu3SnS4 nanoparticles on the support materials was confirmed by the characterization techniques, and the optical properties of the composites were found to be influenced by the nature of the support material. The incorporation of CTS into the support materials resulted in a reduction in band gap energy with evaluated band gaps of 1.65, 1.46, 1.43 eV, and 1.16 eV. The reduction in band gap energy suggests the potential of the composites for enhanced photocatalytic activity. From the photocatalytic study, the degradation efficiency of tetracycline by CTS, PCN-CTS, GO-CTS, and PC/GO-CTS was 74.1, 85.2, 90.9, and 96.5%, respectively. All the composites showed enhanced activity compared to pristine CTS, and the existence of a synergy between GO and PCN when both were employed as support materials was observed. Based on the charge carrier recombination characteristics and the band edge potential calculations from the composites, a possible mechanism of action of each composite was proposed. This study therefore confirms the possibility of modulating the mechanism of action and subsequently the efficiency of semiconductor materials by altering the nature of the support material.
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154
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Varapragasam SP, Andriolo JM, Skinner JL, Grumstrup EM. Photocatalytic Reduction of Aqueous Nitrate with Hybrid Ag/g-C 3N 4 under Ultraviolet and Visible Light. ACS OMEGA 2021; 6:34850-34856. [PMID: 34963968 PMCID: PMC8697391 DOI: 10.1021/acsomega.1c05523] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 11/26/2021] [Indexed: 06/14/2023]
Abstract
The concentration of nitrate in natural surface waters by agricultural runoff remains a challenging problem in environmental chemistry. One promising denitrification strategy is to utilize photocatalysts, whose light-driven excited states are capable of reducing nitrate to nitrogen gas. We have synthesized and characterized pristine and silver-loaded graphitic carbon nitrides and assessed their activity for photocatalytic nitrate reduction at neutral pH. While nitrate reduction does occur on the pristine material, the silver cocatalyst greatly enhances product yields. Kinetic studies performed in batch photoreactors under both UV and visible excitation suggest that nitrate reduction to produce aqueous nitrite, ammonium, and nitrogen gas proceeds via a cooperative water reduction on the silver metal domains to produce adsorbed H atoms. By varying the percentage of silver loading onto the g-C3N4, the density of metal domains can be adjusted, which in turn tunes the reduction selectivity toward various products.
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Affiliation(s)
- Shelton
J. P. Varapragasam
- Department
of Chemistry and Biochemistry, Montana State
University, Bozeman, Montana 59717, United States
| | - Jessica M. Andriolo
- Department
of Mechanical Engineering, Montana Technological
University, Butte, Montana 59701, United
States
| | - Jack L. Skinner
- Department
of Mechanical Engineering, Montana Technological
University, Butte, Montana 59701, United
States
| | - Erik M. Grumstrup
- Department
of Chemistry and Biochemistry, Montana State
University, Bozeman, Montana 59717, United States
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155
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Gajraj V, Kumar A, Ekta D, Kaushik R, Amilan Jose D, Ghosh A, Mariappan CR. Multifunctionality exploration of NiCo 2O 4-rGO nanocomposites: photochemical water oxidation, methanol electro-oxidation and asymmetric supercapacitor applications. Dalton Trans 2021; 50:18001-18015. [PMID: 34821893 DOI: 10.1039/d1dt02417e] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Different weight percentages of NiCo2O4-rGO nanocomposites were prepared via a facile hydrothermal method. The prepared nanocomposites were structurally and morphologically characterized by X-ray diffraction, Raman spectroscopy, and electron microscopy. The structural studies show the formation of rGO-NiCo2O4 nanocomposites by embedment of porous NiCo2O4 rods on rGO sheets. The effect of the NiCo2O4 content on photochemical water oxidation was investigated. It revealed that the catalysts NiCo2O4-rGO with 1 : 26 ratio (NCO26) and 1 : 13 ratio (NCO13) are efficient in generating oxygen under light illumination. It proves that NCO26 works far more effectively as a photocatalyst compared to NCO13. Methanol electro-oxidation of the NCO26 nanocomposite shows a current density of 24 mA cm-2 at a potential of 0.45 V in cyclic voltammetry and maintains the current for 3600 s at 0.45 V in chronoamperometry. An onset potential of 0.344 V was observed for 0.5 M methanol oxidation. The specific capacitance values were found to be 354.75 F g-1 and 375.32 F g-1 at 1 mV s-1 and 1 A g-1, respectively, for NCO26 in supercapacitor studies. The charge stored via capacitive and diffusion-controlled processes was determined using Power's law and Trasatti plot. An asymmetric supercapacitor device shows a specific capacitance of 122.2 F g-1 at a current density of 1 A g-1 and exhibits a retention of 74.3% after 5000 cycles. An energy density of 67.89 W h kg-1 and a power density of 1 kW kg-1 at a current density of 1 A g-1 are observed.
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Affiliation(s)
- V Gajraj
- Department of Physics, National Institute of Technology, Kurukshetra, Haryana - 136119, India. .,Research and Development cell, Uttaranchal University, Dehradun, Uttarakhand-248001, India
| | - A Kumar
- Department of Physics, National Institute of Technology, Kurukshetra, Haryana - 136119, India.
| | - D Ekta
- Department of Physics, National Institute of Technology, Kurukshetra, Haryana - 136119, India.
| | - Rahul Kaushik
- Department of Chemistry, National Institute of Technology, Kurukshetra, Haryana - 136119, India.
| | - D Amilan Jose
- Department of Chemistry, National Institute of Technology, Kurukshetra, Haryana - 136119, India.
| | - Amirta Ghosh
- Department of Chemistry, National Institute of Technology, Kurukshetra, Haryana - 136119, India.
| | - C R Mariappan
- Department of Physics, National Institute of Technology, Kurukshetra, Haryana - 136119, India. .,Department of Physics, National Institute of Technology-Puducherry, Karaikal-609609, India
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156
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Dai B, Biesold GM, Zhang M, Zou H, Ding Y, Wang ZL, Lin Z. Piezo-phototronic effect on photocatalysis, solar cells, photodetectors and light-emitting diodes. Chem Soc Rev 2021; 50:13646-13691. [PMID: 34821246 DOI: 10.1039/d1cs00506e] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The piezo-phototronic effect (a coupling effect of piezoelectric, photoexcitation and semiconducting properties, coined in 2010) has been demonstrated to be an ingenious and robust strategy to manipulate optoelectronic processes by tuning the energy band structure and photoinduced carrier behavior. The piezo-phototronic effect exhibits great potential in improving the quantum yield efficiencies of optoelectronic materials and devices and thus could help increase the energy conversion efficiency, thus alleviating the energy shortage crisis. In this review, the fundamental principles and challenges of representative optoelectronic materials and devices are presented, including photocatalysts (converting solar energy into chemical energy), solar cells (generating electricity directly under light illumination), photodetectors (converting light into electrical signals) and light-emitting diodes (LEDs, converting electric current into emitted light signals). Importantly, the mechanisms of how the piezo-phototronic effect controls the optoelectronic processes and the recent progress and applications in the above-mentioned materials and devices are highlighted and summarized. Only photocatalysts, solar cells, photodetectors, and LEDs that display piezo-phototronic behavior are reviewed. Material and structural design, property characterization, theoretical simulation calculations, and mechanism analysis are then examined as strategies to further enhance the quantum yield efficiency of optoelectronic devices via the piezo-phototronic effect. This comprehensive overview will guide future fundamental and applied studies that capitalize on the piezo-phototronic effect for energy conversion and storage.
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Affiliation(s)
- Baoying Dai
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Gill M Biesold
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Meng Zhang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Haiyang Zou
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Yong Ding
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Zhong Lin Wang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
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157
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Mitoraj D, Krivtsov I, Li C, Rajagopal A, Im C, Adler C, Köble K, Khainakova O, Hniopek J, Neumann C, Turchanin A, da Silva I, Schmitt M, Leiter R, Lehnert T, Popp J, Kaiser U, Jacob T, Streb C, Dietzek B, Beranek R. A Study in Red: The Overlooked Role of Azo-Moieties in Polymeric Carbon Nitride Photocatalysts with Strongly Extended Optical Absorption. Chemistry 2021; 27:17188-17202. [PMID: 34585790 PMCID: PMC9298046 DOI: 10.1002/chem.202102945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Indexed: 12/02/2022]
Abstract
The unique optical and photoredox properties of heptazine-based polymeric carbon nitride (PCN) materials make them promising semiconductors for driving various productive photocatalytic conversions. However, their typical absorption onset at ca. 430-450 nm is still far from optimum for efficient sunlight harvesting. Despite many reports of successful attempts to extend the light absorption range of PCNs, the determination of the structural features responsible for the red shift of the light absorption edge beyond 450 nm has often been obstructed by the highly disordered structure of PCNs and/or low content of the moieties responsible for changes in optical and electronic properties. In this work, we implement a high-temperature (900 °C) treatment procedure for turning the conventional melamine-derived yellow PCN into a red carbon nitride. This approach preserves the typical PCN structure but incorporates a new functionality that promotes visible light absorption. A detailed characterization of the prepared material reveals that partial heptazine fragmentation accompanied by de-ammonification leads to the formation of azo-groups in the red PCN, a chromophore moiety whose role in shifting the optical absorption edge of PCNs has been overlooked so far. These azo moieties can be activated under visible-light (470 nm) for H2 evolution even without any additional co-catalyst, but are also responsible for enhanced charge-trapping and radiative recombination, as shown by spectroscopic studies.
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Affiliation(s)
- Dariusz Mitoraj
- Institute of Electrochemistry ChemistryUlm UniversityAlbert-Einstein-Allee 4789081UlmGermany
| | - Igor Krivtsov
- Institute of Electrochemistry ChemistryUlm UniversityAlbert-Einstein-Allee 4789081UlmGermany
- Department of Organic and Inorganic ChemistryUniversity of Oviedo33006OviedoSpain
| | - Chunyu Li
- Institute of Physical Chemistry and Abbe Center of PhotonicsFriedrich Schiller University JenaLessingstr. 1007743JenaGermany
- Department Functional InterfacesLeibniz Institute of Photonic Technology (IPHT)Albert-Einstein-Str. 907745JenaGermany
| | - Ashwene Rajagopal
- Institute of Inorganic Chemistry IUlm UniversityAlbert-Einstein-Allee 1189081UlmGermany
| | - Changbin Im
- Institute of Electrochemistry ChemistryUlm UniversityAlbert-Einstein-Allee 4789081UlmGermany
| | - Christiane Adler
- Institute of Electrochemistry ChemistryUlm UniversityAlbert-Einstein-Allee 4789081UlmGermany
| | - Kerstin Köble
- Institute of Electrochemistry ChemistryUlm UniversityAlbert-Einstein-Allee 4789081UlmGermany
| | - Olena Khainakova
- Department of Organic and Inorganic ChemistryUniversity of Oviedo33006OviedoSpain
| | - Julian Hniopek
- Institute of Physical Chemistry and Abbe Center of PhotonicsFriedrich Schiller University JenaLessingstr. 1007743JenaGermany
- Department Spectroscopy/ImagingLeibniz Institute of Photonic Technology (IPHT)Albert-Einstein-Str. 907745JenaGermany
| | - Christof Neumann
- Institute of Physical Chemistry and Abbe Center of PhotonicsFriedrich Schiller University JenaLessingstr. 1007743JenaGermany
- Center for Energy and Environmental Chemistry Jena (CEEC Jena)Philosophenweg 7a07743JenaGermany
| | - Andrey Turchanin
- Institute of Physical Chemistry and Abbe Center of PhotonicsFriedrich Schiller University JenaLessingstr. 1007743JenaGermany
- Center for Energy and Environmental Chemistry Jena (CEEC Jena)Philosophenweg 7a07743JenaGermany
| | - Ivan da Silva
- ISIS Neutron and Muon SourceRutherford Appleton LaboratoryHarwell OxfordDidcotOX11 0QXUK
| | - Michael Schmitt
- Institute of Physical Chemistry and Abbe Center of PhotonicsFriedrich Schiller University JenaLessingstr. 1007743JenaGermany
- Department Spectroscopy/ImagingLeibniz Institute of Photonic Technology (IPHT)Albert-Einstein-Str. 907745JenaGermany
| | - Robert Leiter
- Electron Microscopy of Materials ScienceCentral Facility for Electron MicroscopyUlm UniversityAlbert-Einstein-Allee 1189081UlmGermany
| | - Tibor Lehnert
- Electron Microscopy of Materials ScienceCentral Facility for Electron MicroscopyUlm UniversityAlbert-Einstein-Allee 1189081UlmGermany
| | - Jürgen Popp
- Institute of Physical Chemistry and Abbe Center of PhotonicsFriedrich Schiller University JenaLessingstr. 1007743JenaGermany
- Department Spectroscopy/ImagingLeibniz Institute of Photonic Technology (IPHT)Albert-Einstein-Str. 907745JenaGermany
| | - Ute Kaiser
- Electron Microscopy of Materials ScienceCentral Facility for Electron MicroscopyUlm UniversityAlbert-Einstein-Allee 1189081UlmGermany
| | - Timo Jacob
- Institute of Electrochemistry ChemistryUlm UniversityAlbert-Einstein-Allee 4789081UlmGermany
- Helmholtz-Institute-Ulm (HIU)Helmholtzstr. 1189081UlmGermany
- Karlsruhe Institute of Technology (KIT)P.O. Box 364076021KarlsruheGermany
| | - Carsten Streb
- Institute of Inorganic Chemistry IUlm UniversityAlbert-Einstein-Allee 1189081UlmGermany
- Helmholtz-Institute-Ulm (HIU)Helmholtzstr. 1189081UlmGermany
- Karlsruhe Institute of Technology (KIT)P.O. Box 364076021KarlsruheGermany
| | - Benjamin Dietzek
- Institute of Physical Chemistry and Abbe Center of PhotonicsFriedrich Schiller University JenaLessingstr. 1007743JenaGermany
- Department Functional InterfacesLeibniz Institute of Photonic Technology (IPHT)Albert-Einstein-Str. 907745JenaGermany
- Center for Energy and Environmental Chemistry Jena (CEEC Jena)Philosophenweg 7a07743JenaGermany
| | - Radim Beranek
- Institute of Electrochemistry ChemistryUlm UniversityAlbert-Einstein-Allee 4789081UlmGermany
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158
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Facile synthesis of porous Fe-doped g-C3N4 with highly dispersed Fe sites as robust catalysts for dinitro butyl phenol degradation by peroxymonosulfate activation. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127598] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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159
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Tang H, Shang Q, Tang Y, Liu H, Zhang D, Du Y, Liu C. Filter-membrane treatment of flowing antibiotic-containing wastewater through peroxydisulfate-coupled photocatalysis to reduce resistance gene and microbial inhibition during biological treatment. WATER RESEARCH 2021; 207:117819. [PMID: 34741897 DOI: 10.1016/j.watres.2021.117819] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 10/20/2021] [Accepted: 10/25/2021] [Indexed: 06/13/2023]
Abstract
The direct biological treatment of antibiotics containing wastewater brings about a potential risk of antibiotic resistance genes (ARGs) spread. Although advanced oxidation technologies based on photocatalysis generally appear effective at degrading antibiotics in wastewater, the fate of ARGs in succeeding biological treatment system is still unknown. Herein, a filter-membrane-like carbon cloth-immobilized Fe2O3/g-C3N4 photocatalyst is fabricated through immersion-calcination method. Peroxydisulfate-coupled photocatalysis system is developed to degrade tetracycline (TC, an emerging refractory antibiotic pollutant). The system can produce energetic active species (·OH, SO4·-, h+, O2·- and 1O2), exhibiting a superior performance towards TC degradation in static and continuous flow processes under visible-light irradiation. The pretreatment can eliminate the antibacterial activity of antibiotics wastewater, and the chemical oxygen demand removal is greatly enhanced in subsequent anaerobic or aerobic process. The microbial diversity and richness in activated sludge for pretreated water sample are significantly higher than those for the water sample without pretreatment. Meanwhile, the pretreatment can decrease the relative abundance of potential hosts of ARGs and reduce the emergence as well as dissemination risk of ARGs. This study uncovers the effect of pretreatment of antibiotics containing wastewater using advanced oxidation technologies on the treatment efficacy and antibiotic resistome fate in biological treatment system.
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Affiliation(s)
- Haifang Tang
- College of Materials Science and Engineering, Hunan University, Changsha 410082, PR China; State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, PR China
| | - Qian Shang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, PR China
| | - Yanhong Tang
- College of Materials Science and Engineering, Hunan University, Changsha 410082, PR China.
| | - Huiling Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, PR China
| | - Danyu Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, PR China
| | - Yi Du
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, PR China
| | - Chengbin Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, PR China.
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160
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Elsayed MH, Abdellah M, Hung YH, Jayakumar J, Ting LY, Elewa AM, Chang CL, Lin WC, Wang KL, Abdel-Hafiez M, Hung HW, Horie M, Chou HH. Hydrophobic and Hydrophilic Conjugated Polymer Dots as Binary Photocatalysts for Enhanced Visible-Light-Driven Hydrogen Evolution through Förster Resonance Energy Transfer. ACS APPLIED MATERIALS & INTERFACES 2021; 13:56554-56565. [PMID: 34783531 DOI: 10.1021/acsami.1c15812] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Organic semiconducting polymers exhibited promising photocatalytic behavior for hydrogen (H2) evolution, especially when prepared in the form of polymer dots (Pdots). However, the Pdot structures were formed using common nonconjugated amphiphilic polymers, which have a negative effect on charge transfer between photocatalysts and reactants and are unable to participate in the photocatalytic reaction. This study presents a new strategy for constructing binary Pdot photocatalysts by replacing the nonconjugated amphiphilic polymer typically employed in the preparation of polymer nanoparticles (Pdots) with a low-molecular-weight conjugated polyelectrolyte. The as-prepared polyelectrolyte/hydrophobic polymer-based binary Pdots truly enhance the electron transfer between the Pt cocatalyst and the polymer photocatalyst with good water dispersibility. Moreover, unlike the nonconjugated amphiphilic polymer, the photophysics and mechanism of this photocatalytic system through time-correlated single-photon counting (TCSPC) and transient absorption (TA) measurements confirmed the Förster resonance energy transfer (FRET) between the polyelectrolyte as a donor and the hydrophobic polymer as an acceptor. As a result, the designated binary Pdot photocatalysts significantly enhanced the hydrogen evolution rate (HER) of 43 900 μmol g-1 h-1 (63.5 μmol h-1, at 420 nm) for PTTPA/PFTBTA Pdots under visible-light irradiation.
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Affiliation(s)
- Mohamed Hammad Elsayed
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
- Department of Chemistry, Faculty of Science, Al-Azhar University, Nasr City, 11884 Cairo, Egypt
| | - Mohamed Abdellah
- Chemical Physics and NanoLund, Lund University, 22100 Lund, Sweden
- Department of Chemistry, Qena Faculty of Science, South Valley University, 83523 Qena, Egypt
| | - Yi-Hao Hung
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Jayachandran Jayakumar
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Li-Yu Ting
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Ahmed M Elewa
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Chih-Li Chang
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Wei-Cheng Lin
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Kuo-Lung Wang
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Mahmoud Abdel-Hafiez
- Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden
- Faculty of Science, Physics Department, Fayoum University, 63514 Fayoum, Egypt
| | - Hsiao-Wen Hung
- Lighting Energy-Saving Department, Intelligent Energy-Saving Systems Division, Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 310401, Taiwan
| | - Masaki Horie
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Ho-Hsiu Chou
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
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161
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Oseghe EO, Akpotu SO, Mombeshora ET, Oladipo AO, Ombaka LM, Maria BB, Idris AO, Mamba G, Ndlwana L, Ayanda OS, Ofomaja AE, Nyamori VO, Feleni U, Nkambule TT, Msagati TA, Mamba BB, Bahnemann DW. Multi-dimensional applications of graphitic carbon nitride nanomaterials – A review. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117820] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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162
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Song Y, Zhang H, Guo J, Shao Y, Ding Y, Zhu L, Yao X. Visible‐Light‐Induced Oxidative α‐Alkylation of Glycine Derivatives with Ethers under Metal‐Free Conditions. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101242] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Yang Song
- Department of Applied Chemistry College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 PR China
| | - Hao Zhang
- Department of Applied Chemistry College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 PR China
| | - Jiabao Guo
- Department of Applied Chemistry College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 PR China
| | - Yifei Shao
- Department of Applied Chemistry College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 PR China
| | - Yuzhou Ding
- Department of Chemistry School of Pharmacy Nanjing Medical University Nanjing 211166 PR China
| | - Li Zhu
- Department of Chemistry School of Pharmacy Nanjing Medical University Nanjing 211166 PR China
| | - Xiaoquan Yao
- Department of Applied Chemistry College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 PR China
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163
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Shang Q, Fang Y, Yin X, Kong X. Structure modulation of g-C 3N 4 in TiO 2{001}/g-C 3N 4 hetero-structures for boosting photocatalytic hydrogen evolution. RSC Adv 2021; 11:37089-37102. [PMID: 35496402 PMCID: PMC9043575 DOI: 10.1039/d1ra07691d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 11/11/2021] [Indexed: 01/17/2023] Open
Abstract
Structure design of photocatalysts is highly desirable for taking full advantage of their abilities for H2 evolution. Herein, the highly-efficient TiO2{001}/g-C3N4 (TCN) heterostructures have been fabricated successfully via an in situ ethanol-thermal method. And the structure of g-C3N4 in the TCN heterostructures could be exfoliated from bulk g-C3N4 to nanosheets, nanocrystals and quantum dots with the increase of the synthetic temperature. Through detailed characterization, the structural evolution of g-C3N4 could be attributed to the enhanced temperature of the ethanol-thermal treatment with the shear effects of HF acid. As expected, the optimal TCN-2 heterostructure shows excellent photocatalytic H2 evolution efficiency (1.78 mmol h-1 g-1) under visible-light irradiation. Except for the formed built-in electric field, the significantly enhanced photocatalytic activity of TCN-2 could be ascribed to the enhanced crystallinity of TiO2{001} nanosheets and the formed g-C3N4 nanocrystals with large surface area, which could extend the visible light absorption, and expedite the transfer of photo-generated charge carriers further. Our work could provide guidance on designing TCN heterostructures with the desired structure for highly-efficient photocatalytic water splitting.
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Affiliation(s)
- Qianqian Shang
- College of Chemistry and Chemical Engineering, Liaocheng University Liaocheng 252000 China
| | - Yuzhen Fang
- College of Chemistry and Chemical Engineering, Liaocheng University Liaocheng 252000 China
| | - Xingliang Yin
- College of Chemistry and Chemical Engineering, Liaocheng University Liaocheng 252000 China
| | - Xiangjin Kong
- College of Chemistry and Chemical Engineering, Liaocheng University Liaocheng 252000 China
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164
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Dolai S, Bhunia SK, Kluson P, Stavarek P, Pittermannova A. Solvent‐Assisted Synthesis of Supramolecular‐Assembled Graphitic Carbon Nitride for Visible Light Induced Hydrogen Evolution – A Review. ChemCatChem 2021. [DOI: 10.1002/cctc.202101299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Susmita Dolai
- Institute of Chemical Process Fundamentals of the CAS, v.v.i Rozvojová 2/135 165 02 Prague Czech Republic
- Institute for Environmental Studies Faculty of Science Charles University Benatska 2 128 01 Praha 2 Czech Republic
| | - Susanta Kumar Bhunia
- Department of Chemistry School of Advanced Sciences Vellore Institute of Technology Vellore 632014 India
| | - Petr Kluson
- Institute of Chemical Process Fundamentals of the CAS, v.v.i Rozvojová 2/135 165 02 Prague Czech Republic
- Institute for Environmental Studies Faculty of Science Charles University Benatska 2 128 01 Praha 2 Czech Republic
| | - Petr Stavarek
- Institute of Chemical Process Fundamentals of the CAS, v.v.i Rozvojová 2/135 165 02 Prague Czech Republic
| | - Anna Pittermannova
- Institute of Chemical Process Fundamentals of the CAS, v.v.i Rozvojová 2/135 165 02 Prague Czech Republic
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165
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Kuchmiy SY. Photocatalytic Air Decontamination from Volatile Organic Pollutants Using Graphite-Like Carbon Nitride: a Review. THEOR EXP CHEM+ 2021. [DOI: 10.1007/s11237-021-09693-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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166
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Gandamalla A, Manchala S, Verma A, Fu YP, Shanker V. Microwave-assisted synthesis of ZnAl-LDH/g-C 3N 4 composite for degradation of antibiotic ciprofloxacin under visible-light illumination. CHEMOSPHERE 2021; 283:131182. [PMID: 34153923 DOI: 10.1016/j.chemosphere.2021.131182] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 05/23/2021] [Accepted: 06/07/2021] [Indexed: 06/13/2023]
Abstract
Ciprofloxacin (CIP) is a fluoroquinolone family antibiotic pollutant. CIP existence in water environment has been rising very fast in day-to-day life and subsequently, it gives enormous health issues for humans because of its potent biological activity. To encounter this, current researchers are focusing on the development of highly efficient visible light semiconductor nanocomposites with potential photocatalytic activity. In the present work, we have successfully synthesized highly efficient zinc-aluminum layered double hydroxides with graphitic carbon nitride (ZALDH/CN) composites via a simple microwave irradiation method first time for the degradation of CIP under visible light. The fabricated materials are subsequently characterized by various spectroscopic techniques. UV-Vis DRS, TRFL, XRD, FT-IR, BET, FE-SEM, TEM, and XPS for optical, crystal structure, morphological, and elemental analysis. The main reactive intermediates which are formed during the photocatalytic degradation process were analyzed by LC-MS analysis. It is worth to note that, the optimized ZALDH/CN-10 composite showed the highest photo-degradation rate constant of 1.22 × 10-2 min-1 with 84.10% degradation is higher than bare CN and ZALDH photocatalysts. Based on the electron-hole pair trapping experiment results, possible CIP photo-degradation mechanism was also explained in the present study. With all results, this work demonstrates the ZALDH/CN composite materials showed a high synergistic effect with more specific surface area. Highest specific surface area leads to enhanced visible light adsorption capacity. Subsequently improved number of catalytically active sites. Furthermore, as compared with pure materials, composites of ZALDH/CN are having low electron-hole pair recombination. Consequently, the composites ZALDH/CN showed superior photocatalytic activity for antibiotic pollutant CIP degradation under visible-light illumination.
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Affiliation(s)
- Ambedkar Gandamalla
- Department of Chemistry, National Institute of Technology Warangal, Warangal, 506004, Telangana, India; Center for Advanced Materials, National Institute of Technology Warangal, Warangal, 506004, Telangana, India; Department of Material Science and Engineering, National Dong Hwa University, Hualien, 97401, Taiwan, ROC
| | - Saikumar Manchala
- Department of Chemistry, National Institute of Technology Warangal, Warangal, 506004, Telangana, India; Center for Advanced Materials, National Institute of Technology Warangal, Warangal, 506004, Telangana, India; Department of Chemistry, Malla Reddy Engineering College (Autonomous), Maisaammaguda, Dhulapally, Secunderabad, 500100, Telangana, India
| | - Atul Verma
- Department of Material Science and Engineering, National Dong Hwa University, Hualien, 97401, Taiwan, ROC
| | - Yen-Pei Fu
- Department of Material Science and Engineering, National Dong Hwa University, Hualien, 97401, Taiwan, ROC.
| | - Vishnu Shanker
- Department of Chemistry, National Institute of Technology Warangal, Warangal, 506004, Telangana, India; Center for Advanced Materials, National Institute of Technology Warangal, Warangal, 506004, Telangana, India.
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167
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Zhou Y, Zeng F, Sun C, Wu J, Xie Y, Zhang F, Rao S, Wang F, Zhang J, Zhao J, Li S. Gd2O3 nanoparticles modified g-C3N4 with enhanced photocatalysis activity for degradation of organic pollutants. J RARE EARTH 2021. [DOI: 10.1016/j.jre.2021.06.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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168
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Abstract
Air pollution has been a recurring problem in northern Chinese cities, and high concentrations of PM2.5 in winter have been a particular cause for concern. Secondary aerosols converted from precursor gases (i.e., nitrogen oxides and volatile organic compounds) evidently account for a large fraction of the PM2.5. Conventional control methods, such as dust removal, desulfurization, and denitrification, help reduce emissions from stationary combustion sources, but these measures have not led to decreases in haze events. Recent advances in nanomaterials and nanotechnology provide new opportunities for removing fine particles and gaseous pollutants from ambient air and reducing the impacts on human health. This review begins with overviews of air pollution and traditional abatement technologies, and then advances in ambient air purification by nanotechnologies, including filtration, adsorption, photocatalysis, and ambient-temperature catalysis are presented—from fundamental principles to applications. Current state-of-the-art developments in the use of nanomaterials for particle removal, gas adsorption, and catalysis are summarized, and practical applications of catalysis-based techniques for air purification by nanomaterials in indoor, semi-enclosed, and open spaces are highlighted. Finally, we propose future directions for the development of novel disinfectant nanomaterials and the construction of advanced air purification devices.
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169
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García-Mulero A, Rendón-Patiño A, Asiri AM, Primo A, Garcia H. Band Engineering of Semiconducting Microporous Graphitic Carbons by Phosphorous Doping: Enhancing of Photocatalytic Overall Water Splitting. ACS APPLIED MATERIALS & INTERFACES 2021; 13:48753-48763. [PMID: 34623144 DOI: 10.1021/acsami.1c14357] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Carbon-based solar photocatalysts for overall water splitting could provide H2 as an energy vector in a clean and sustainable way. Band engineering to align energy levels can be achieved, among other ways, by doping. Herein, it is shown that phosphorous doping of microporous graphitic carbons derived from pyrolysis of α-, β-, and γ-cyclodextrin increases the valence band edge energy of the material, and the energy value of the conduction band decreases with the P content. In this way, P doping increases the activity of these metal-free materials in photocatalytic overall water splitting under simulated sunlight and visible-light illumination. The optimal P-doped photocatalyst in the absence of any metal as a cocatalyst affords, after 4 h of irradiation with simulated sunlight, a H2 production of 2.5 mmol of H2 × gcatalyst-1 in the presence of methanol as the sacrificial agent or 225 μmol of H2 × gcatalyst-1 from pure H2O.
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Affiliation(s)
- Ana García-Mulero
- Instituto de Tecnología Química, Consejo Superior de Investigaciones Científicas-Universitat Politècnica de Valencia, Universitat Politècnica de Valencia, Av. De los Naranjos s/n, 46022 Valencia, Spain
| | - Alejandra Rendón-Patiño
- Instituto de Tecnología Química, Consejo Superior de Investigaciones Científicas-Universitat Politècnica de Valencia, Universitat Politècnica de Valencia, Av. De los Naranjos s/n, 46022 Valencia, Spain
| | - Abdullah M Asiri
- Center of Excellence for Advanced Materials, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Ana Primo
- Instituto de Tecnología Química, Consejo Superior de Investigaciones Científicas-Universitat Politècnica de Valencia, Universitat Politècnica de Valencia, Av. De los Naranjos s/n, 46022 Valencia, Spain
| | - Hermenegildo Garcia
- Instituto de Tecnología Química, Consejo Superior de Investigaciones Científicas-Universitat Politècnica de Valencia, Universitat Politècnica de Valencia, Av. De los Naranjos s/n, 46022 Valencia, Spain
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170
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Huang H, Feng W, Chen Y. Two-dimensional biomaterials: material science, biological effect and biomedical engineering applications. Chem Soc Rev 2021; 50:11381-11485. [PMID: 34661206 DOI: 10.1039/d0cs01138j] [Citation(s) in RCA: 74] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
To date, nanotechnology has increasingly been identified as a promising and efficient means to address a number of challenges associated with public health. In the past decade, two-dimensional (2D) biomaterials, as a unique nanoplatform with planar topology, have attracted explosive interest in various fields such as biomedicine due to their unique morphology, physicochemical properties and biological effect. Motivated by the progress of graphene in biomedicine, dozens of types of ultrathin 2D biomaterials have found versatile bio-applications, including biosensing, biomedical imaging, delivery of therapeutic agents, cancer theranostics, tissue engineering, as well as others. The effective utilization of 2D biomaterials stems from the in-depth knowledge of structure-property-bioactivity-biosafety-application-performance relationships. A comprehensive summary of 2D biomaterials for biomedicine is still lacking. In this comprehensive review, we aim to concentrate on the state-of-the-art 2D biomaterials with a particular focus on their versatile biomedical applications. In particular, we discuss the design, fabrication and functionalization of 2D biomaterials used for diverse biomedical applications based on the up-to-date progress. Furthermore, the interactions between 2D biomaterials and biological systems on the spatial-temporal scale are highlighted, which will deepen the understanding of the underlying action mechanism of 2D biomaterials aiding their design with improved functionalities. Finally, taking the bench-to-bedside as a focus, we conclude this review by proposing the current crucial issues/challenges and presenting the future development directions to advance the clinical translation of these emerging 2D biomaterials.
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Affiliation(s)
- Hui Huang
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China. .,School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, P. R. China
| | - Wei Feng
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China.
| | - Yu Chen
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China. .,School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, P. R. China.,Wenzhou Institute of Shanghai University, Wenzhou, 325000, P. R. China.,School of Medicine, Shanghai University, Shanghai, 200444, P. R. China
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171
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Yang C, Xu H, Shi J, Liu Z, Zhao L. Preparation and Photocatalysis of CuO/Bentonite Based on Adsorption and Photocatalytic Activity. MATERIALS 2021; 14:ma14195803. [PMID: 34640199 PMCID: PMC8510130 DOI: 10.3390/ma14195803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 09/30/2021] [Accepted: 10/01/2021] [Indexed: 11/16/2022]
Abstract
A CuO/bentonite composite photocatalyst was prepared to fully utilize the adsorption capacity of bentonite and the photocatalytic activity of CuO. CuO and bentonite were chosen as a photocatalyst due to the excellent optical property of CuO and large specific surface area of bentonite, together with their high stability and low production cost. The sample was characterized by XRD, SEM, and BET. The effects of several factors on degradation process were investigated such as dosage of H2O2, irradiation time, pH of the solution, and dosage of catalyst. The optimum conditions for decolorization of methylene blue solution by CuO/bentonite were determined. Under optimal conditions, the decolorization efficiency of methylene blue by a 1.4% CuO/bentonite (400 °C) composite photocatalyst under visible irradiation at 240 min reached 96.98%. The degradation process follow edpseudo-second-order kinetics. The photocatalytic mechanism is discussed in detail. This composite structure provides a new solution to the cycle and aggregation of the photocatalyst in water.
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Affiliation(s)
- Cuina Yang
- State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, Nanjing 210007, China;
- School of Civil Engineering and Architecture, Xinxiang University, Xinxiang 453003, China; (J.S.); (L.Z.)
| | - Hongfa Xu
- State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, Nanjing 210007, China;
- Correspondence:
| | - Jicun Shi
- School of Civil Engineering and Architecture, Xinxiang University, Xinxiang 453003, China; (J.S.); (L.Z.)
| | - Zhifeng Liu
- School of Materials Science and Engineering, Tianjin Chengjian University, Tianjin 300384, China;
| | - Lei Zhao
- School of Civil Engineering and Architecture, Xinxiang University, Xinxiang 453003, China; (J.S.); (L.Z.)
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172
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Su J, Su H, Chen J, Li X. Semiconductor‐based nanocomposites for selective organic synthesis. NANO SELECT 2021. [DOI: 10.1002/nano.202100065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Affiliation(s)
- Juan Su
- School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai China
| | - Hui Su
- School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai China
| | - Jie‐Sheng Chen
- School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai China
| | - Xin‐Hao Li
- School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai China
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173
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Benzotrithiophene and triphenylamine based covalent organic frameworks as heterogeneous photocatalysts for benzimidazole synthesis. J Catal 2021. [DOI: 10.1016/j.jcat.2021.08.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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174
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Stroyuk O, Raievska O, Zahn DRT. Single-layer carbon nitride: synthesis, structure, photophysical/photochemical properties, and applications. Phys Chem Chem Phys 2021; 23:20745-20764. [PMID: 34542127 DOI: 10.1039/d1cp03457j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
This Perspective provides a critical summary of the current state of the art in the synthesis and properties of polyheptazine single-layer carbon nitride (SLCN). The summary combines the authors' research and literature reports on SLCN concerning the synthesis of single-layer polyheptazine sheets, light absorption and emission by SLCN, photochemical and photocatalytic properties of SLCN as well as examples of applications of SLCN sheets as "building blocks" in heterostructures with nanocrystalline semiconductors and metals. The Perspective is concluded with an outlook discussing the most promising directions for further studies and applications of SLCN and related composites.
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Affiliation(s)
- Oleksandr Stroyuk
- Forschungszentrum Jülich GmbH, Helmholtz-Institut Erlangen Nürnberg für Erneuerbare Energien (HI ERN), Immerwahrstr. 2, 91058 Erlangen, Germany.
| | - Oleksandra Raievska
- Semiconductor Physics, Chemnitz University of Technology, D-09107 Chemnitz, Germany. .,Center for Materials, Architectures, and Integration of Nanomembranes (MAIN), Chemnitz University of Technology, D-09107 Chemnitz, Germany
| | - Dietrich R T Zahn
- Semiconductor Physics, Chemnitz University of Technology, D-09107 Chemnitz, Germany. .,Center for Materials, Architectures, and Integration of Nanomembranes (MAIN), Chemnitz University of Technology, D-09107 Chemnitz, Germany
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175
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Olademehin OP, Ellington TL, Shuford KL. Toward Quantum Confinement in Graphitic Carbon Nitride-Based Polymeric Monolayers. J Phys Chem A 2021; 125:7597-7606. [PMID: 34460266 DOI: 10.1021/acs.jpca.1c04597] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Graphitic carbon nitride (g-C3N4) has garnered much attention due to its potential as an efficient metal-free photocatalyst. This study examines the evolution of properties in zero-dimensional quantum dots up to sizable clusters that mimic extended g-C3N4 monolayers. We employ density functional theory to investigate systematically the structural, electronic, and optical properties of the g-C3N4-based melamine and heptazine building blocks using a "bottom-up" construction of polymeric monolayers. The results from our computations indicate that the melamine- and heptazine-based polymeric g-C3N4 systems must be reduced to at least 2.74 and 4.00 nm, respectively, to observe an increase of its optical gap with a size reduction. The present study also examines the nature of the electronic transitions exhibited by g-C3N4-based monolayers through full natural transition orbital and density of state analyses. The most promising sites for water splitting and subsequent chemical doping studies are identified, which generally correspond to the nitrogen and carbon atoms, respectively.
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Affiliation(s)
- Olatunde P Olademehin
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - Thomas L Ellington
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - Kevin L Shuford
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
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176
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Kumar P, Mulmi S, Laishram D, Alam KM, Thakur UK, Thangadurai V, Shankar K. Water-splitting photoelectrodes consisting of heterojunctions of carbon nitride with a p-type low bandgap double perovskite oxide. NANOTECHNOLOGY 2021; 32:485407. [PMID: 33706303 DOI: 10.1088/1361-6528/abedec] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Accepted: 03/11/2021] [Indexed: 06/12/2023]
Abstract
Quinary and senary non-stoichiometric double perovskites such as Ba2Ca0.66Nb1.34-xFexO6-δ(BCNF) have been utilized for gas sensing, solid oxide fuel cells and thermochemical CO2reduction. Herein, we examined their potential as narrow bandgap semiconductors for use in solar energy harvesting. A cobalt co-doped BCNF, Ba2Ca0.66Nb0.68Fe0.33Co0.33O6-δ(BCNFCo), exhibited an optical absorption edge at ∼800 nm,p-type conduction and a distinct photoresponse up to 640 nm while demonstrating high thermochemical stability. A nanocomposite of BCNFCo and g-C3N4(CN) was prepared via a facile solvent-assisted exfoliation/blending approach using dichlorobenzene and glycerol at a moderate temperature. The exfoliation of g-C3N4followed by wrapping on perovskite established an effective heterojunction between the materials for charge separation. The conjugated 2D sheets of CN enabled better charge migration resulting in increased photoelectrochemical performance. A blend composed of 40 wt% perovskites and CN performed optimally, whilst achieving a photocurrent density as high as 1.5 mA cm-2for sunlight-driven water-splitting with a Faradaic efficiency as high as ∼88%.
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Affiliation(s)
- Pawan Kumar
- Department of Electrical and Computer Engineering, University of Alberta, 9211-116 St, Edmonton, Alberta, T6G 1H9, Canada
| | - Suresh Mulmi
- Department of Chemistry, University of Calgary, 2500 University Dr NW, Calgary, Alberta, T2N 1N4, Canada
| | - Devika Laishram
- Department of Electrical and Computer Engineering, University of Alberta, 9211-116 St, Edmonton, Alberta, T6G 1H9, Canada
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan, 342011, India
| | - Kazi M Alam
- Department of Electrical and Computer Engineering, University of Alberta, 9211-116 St, Edmonton, Alberta, T6G 1H9, Canada
| | - Ujwal K Thakur
- Department of Electrical and Computer Engineering, University of Alberta, 9211-116 St, Edmonton, Alberta, T6G 1H9, Canada
| | - Venkataraman Thangadurai
- Department of Chemistry, University of Calgary, 2500 University Dr NW, Calgary, Alberta, T2N 1N4, Canada
| | - Karthik Shankar
- Department of Electrical and Computer Engineering, University of Alberta, 9211-116 St, Edmonton, Alberta, T6G 1H9, Canada
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177
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Chen YH, Wang BK, Hou WC. Graphitic carbon nitride embedded with graphene materials towards photocatalysis of bisphenol A: The role of graphene and mediation of superoxide and singlet oxygen. CHEMOSPHERE 2021; 278:130334. [PMID: 34126674 DOI: 10.1016/j.chemosphere.2021.130334] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 03/14/2021] [Accepted: 03/16/2021] [Indexed: 06/12/2023]
Abstract
Composite photocatalysts comprising graphitic carbon nitride (g-C3N4) and graphene materials were synthesized and evaluated in the photocatalysis of bisphenol A (BPA) with a focus on elucidating the reaction mechanism. Embedding reduced graphene oxide (rGO) to g-C3N4 significantly accelerated the photocatalysis rate of BPA by three folds under visible light irradiation at neutral pH. We showed that rGO synthesized in intimate contact with g-C3N4 increased the surface areas and electrical conductivity of the g-C3N4 composites and promoted the electron-hole pair separation. The BPA photodegradation mechanism involved selective oxidants as superoxide (O2•-) and singlet oxygen (1O2) that were formed through one-electron reduction of O2 and the unique oxidation of O2•- by photogenerated hole (h+), respectively. The synthesized photocatalyst exhibited superior visible light photoreactivity to that of N-doped P25 TiO2, good photo-stability and reuse potential, and was operative in complex wastewater. rGO embedded g-C3N4 achieved good photomineralization of BPA at 80% in 4 h compared to 40% of bare g-C3N4. This study sheds light on the photocatalysis mechanism of BPA with a metal-free, promising rGO/g-C3N4 photocatalyst.
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Affiliation(s)
- Yu-Hsin Chen
- Department of Environmental Engineering, National Cheng Kung University, Tainan City, 70101, Taiwan
| | - Bo-Kai Wang
- Department of Environmental Engineering, National Cheng Kung University, Tainan City, 70101, Taiwan
| | - Wen-Che Hou
- Department of Environmental Engineering, National Cheng Kung University, Tainan City, 70101, Taiwan.
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178
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Iqbal N, Afzal A, Khan I, Khan MS, Qurashi A. Molybdenum impregnated g-C 3N 4 nanotubes as potentially active photocatalyst for renewable energy applications. Sci Rep 2021; 11:16886. [PMID: 34413449 PMCID: PMC8377046 DOI: 10.1038/s41598-021-96490-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 08/11/2021] [Indexed: 11/12/2022] Open
Abstract
Molybdenum (Mo) impregnated g-C3N4 (Mo-CN) nanotubes are fabricated via a thermal/hydrothermal process to augment photoelectrochemical properties during solar-driven water-splitting (SDWS) reactions. Graphitic-C3N4 is an attractive material for photocatalysis because of its suitable band energy, high thermal and chemical stability. The FE-SEM and HR-TEM comprehend the nanotube-like morphology of Mo-CN. The spectroscopic characterization revealed bandgap energy of 2.63 eV with high visible-light activity. The x-ray diffraction of pristine g-C3N4 and Mo-CN nanotubes discloses the formation of triazine-based nanocrystalline g-C3N4, which remains stable during hydrothermal impregnation of Mo. Furthermore, Mo-CN nanotubes possess high sp2-hybridized nitrogen content, and metallic/oxidized Mo nanoparticles (in a ratio of 1:2) are impregnated into g-C3N4. The XPS analysis confirms C, N, and Mo for known atomic and oxidation states in Mo-CN. Furthermore, high photocurrent efficiency (~ 5.5 mA/cm2) is observed from 5%-Mo-CN nanotubes. That displays efficient SDWS by 5%-Mo-CN nanotubes than other counterparts. Impedance spectroscopy illustrated the lowest charge transfer resistance (Rct) of 5%-Mo-CN nanotubes, which further confirms the fast electron transfer kinetics and efficient charge separation resulting in high photocurrent generation. Hence, 5%Mo-CN composite nanotubes can serve as a potential photocatalytic material for viable solar-driven water splitting.
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Affiliation(s)
- Naseer Iqbal
- Department of Chemistry, College of Science, University of Hafr Al Batin, P.O. Box 1803, Hafr Al Batin, 39524, Saudi Arabia.
| | - Adeel Afzal
- Department of Chemistry, College of Science, University of Hafr Al Batin, P.O. Box 1803, Hafr Al Batin, 39524, Saudi Arabia
| | - Ibrahim Khan
- Center of Research Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Muhammad Shahzeb Khan
- Department of Mechanical Engineering, College of Engineering, University of Hafr Al Batin, P.O. Box 1803, Hafr Al Batin, 39524, Saudi Arabia
| | - Ahsanulhaq Qurashi
- Center of Research Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
- Department of Chemistry, Khalifa University of Science and Technology, Main Campus, P.O. Box 127788, Abu Dhabi, United Arab Emirates
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179
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Wang F, Wang R, Jia T, Wu J, Xu C, Sun Y, Wang X, Wu W, Qi Y. Spherical-shaped CuS modified carbon nitride nanosheet for efficient capture of elemental mercury from flue gas at low temperature. JOURNAL OF HAZARDOUS MATERIALS 2021; 415:125692. [PMID: 34088187 DOI: 10.1016/j.jhazmat.2021.125692] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 03/09/2021] [Accepted: 03/16/2021] [Indexed: 06/12/2023]
Abstract
Mercury (Hg0) pollution poses a huge threat to human health and the environment due to its high toxicity, long persistence and bioaccumulation in the environment. Most of the traditional Hg0 adsorbents have a low reaction rate, high operating cost, especially poor resistance to SO2, which limited their practical application. In this work, nanosheet g-C3N4 was used as the support and modified by CuS to capture flue gas mercury. Take advantage of the large specific surface area of g-C3N4 to increase the BET of the composite and decrease the use of CuS. The effects of CuS loading, reaction temperature, and common components in the coal-fired flue gas on the mercury removal performance were studied respectively. The experimental outcomes showed that the 10CuS/g-C3N4 (10CuS/CN) reaches as high as almost 100% Hg0 removal efficiency under the temperature of 40-120 ℃. Meanwhile the common components like SO2, NO, HCl and H2O have no obvious inhibition effects on Hg0 removal efficiency of the 10CuS/CN adsorbent. Sx2- and Cu2+ as the primary bonding sites shows a synergy effect on Hg0 removal. 10CuS/CN is a promising material for Hg0 removal under various flue gas conditions, which is expected to be a substitute for traditional adsorbents.
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Affiliation(s)
- Fangjun Wang
- College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
| | - Run Wang
- College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
| | - Tao Jia
- College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
| | - Jiang Wu
- College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China.
| | - Chengfang Xu
- College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
| | - Yu Sun
- College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
| | - Xin Wang
- College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
| | - Wenyu Wu
- College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
| | - Yongfeng Qi
- School of Hydraulic Energy and Power Engineering, Yangzhou University, Yangzhou 225127, China
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180
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Gellé A, Price GD, Voisard F, Brodusch N, Gauvin R, Amara Z, Moores A. Enhancing Singlet Oxygen Photocatalysis with Plasmonic Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2021; 13:35606-35616. [PMID: 34309350 DOI: 10.1021/acsami.1c05892] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Photocatalysts able to trigger the production of singlet oxygen species are the topic of intense research efforts in organic synthesis. Yet, challenges still exist in improving their activity and optimizing their use. Herein, we exploited the benefits of plasmonic nanoparticles to boost the activity of such photocatalysts via an antenna effect in the visible range. We synthesized silica-coated silver nanoparticles (Ag@SiO2 NPs), with silica shells which thicknesses ranged from 7 to 45 nm. We showed that they served as plasmonically active supports for tris(bipyridine)ruthenium(II), [Ru(bpy)3]2+, and demonstrated an enhanced catalytic activity under white light-emitting diode (LED) irradiation for citronellol oxidation, a key step in the commercial production of rose oxide fragrance. A maximum enhancement of the plasmon-mediated reactivity of approximately 3-fold was observed with a 28 nm silica layer along with a 4-fold enhancement in the emission intensity of the photocatalyst. Using electron energy loss spectroscopy (EELS) and boundary element method simulations, we mapped the decay of the plasmonic signal around the Ag core and provided a rationale for the observed catalytic enhancement. This work provides a systematic analysis of the promising properties of plasmonic NPs used as catalysis-enhancing supports for common homogeneous photocatalysts and a framework for the successful design of such systems in the context of organic transformations.
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Affiliation(s)
- Alexandra Gellé
- Centre for Green Chemistry and Catalysis, Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Gareth D Price
- Centre for Green Chemistry and Catalysis, Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Frédéric Voisard
- Department of Mining and Materials Engineering, McGill University, 3610 University Street, Montreal, Quebec H3A 0C5, Canada
| | - Nicolas Brodusch
- Department of Mining and Materials Engineering, McGill University, 3610 University Street, Montreal, Quebec H3A 0C5, Canada
| | - Raynald Gauvin
- Department of Mining and Materials Engineering, McGill University, 3610 University Street, Montreal, Quebec H3A 0C5, Canada
| | - Zacharias Amara
- Équipe de Chimie Moléculaire, Laboratoire de Génomique, Bioinformatique et Chimie Moléculaire, (GBCM), EA7528, Conservatoire National des Arts et Métiers, HESAM Université, 2 rue Conté, 75003 Paris, Cedex 03, France
| | - Audrey Moores
- Centre for Green Chemistry and Catalysis, Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
- Department of Mining and Materials Engineering, McGill University, 3610 University Street, Montreal, Quebec H3A 0C5, Canada
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181
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Umesh NM, Antolin Jesila J, Wang SF, Govindasamy M, Alshgari RA, Ouladsmane M, Asharani I. Fabrication of highly sensitive anticancer drug sensor based on heterostructured ZnO-Co3O4 capped on carbon nitride nanomaterials. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106244] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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182
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Awasthi GP, Kaliannagounder VK, Park J, Maharjan B, Shin M, Yu C, Park CH, Kim CS. Assembly of porous graphitic carbon nitride nanosheets into electrospun polycaprolactone nanofibers for bone tissue engineering. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126584] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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183
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Ben SK, Gupta S, Raj KK, Chandra V. Synthesis of g‐C
3
N
4
, Zn
3
(PO
4
)
2
and g‐C
3
N
4
/Zn
3
(PO
4
)
2
Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light. ChemistrySelect 2021. [DOI: 10.1002/slct.202101718] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Sachin Kumar Ben
- Department of Chemistry Dr. Harisingh Gour University Sagar (M.P.) 470003 India
| | - Sakshi Gupta
- Department of Chemistry Dr. Harisingh Gour University Sagar (M.P.) 470003 India
| | - Krishna Kumar Raj
- Department of Chemistry Dr. Harisingh Gour University Sagar (M.P.) 470003 India
| | - Vimlesh Chandra
- Department of Chemistry Dr. Harisingh Gour University Sagar (M.P.) 470003 India
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184
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Ab-Initio Spectroscopic Characterization of Melem-Based Graphitic Carbon Nitride Polymorphs. NANOMATERIALS 2021; 11:nano11071863. [PMID: 34361249 PMCID: PMC8308387 DOI: 10.3390/nano11071863] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/09/2021] [Accepted: 07/13/2021] [Indexed: 01/09/2023]
Abstract
Polymeric graphitic carbon nitride (gCN) compounds are promising materials in photoactivated electrocatalysis thanks to their peculiar structure of periodically spaced voids exposing reactive pyridinic N atoms. These are excellent sites for the adsorption of isolated transition metal atoms or small clusters that can highly enhance the catalytic properties. However, several polymorphs of gCN can be obtained during synthesis, differing for their structural and electronic properties that ultimately drive their potential as catalysts. The accurate characterization of the obtained material is critical for the correct rationalization of the catalytic results; however, an unambiguous experimental identification of the actual polymer is challenging, especially without any reference spectroscopic features for the assignment. In this work, we optimized several models of melem-based gCN, taking into account different degrees of polymerization and arrangement of the monomers, and we present a thorough computational characterization of their simulated XRD, XPS, and NEXAFS spectroscopic properties, based on state-of-the-art density functional theory calculations. Through this detailed study, we could identify the peculiar fingerprints of each model and correlate them with its structural and/or electronic properties. Theoretical predictions were compared with the experimental data whenever they were available.
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185
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Khan MY, Khan I, Zeama M, Khan A. Sulfone-containing Conjugated Polyimide 2D Nanosheets for Efficient Water Oxidation. Chem Asian J 2021; 16:1979-1987. [PMID: 34058080 DOI: 10.1002/asia.202100392] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/27/2021] [Indexed: 11/11/2022]
Abstract
Water oxidation is a bottleneck in artificial photosynthesis that impedes its practicality for solar energy conversion and utilization. It is highly desired to significantly improve the efficacy of the existing catalysts or to rationally design new catalysts with improved performance. We report a novel conjugated and sulfone containing polyimide as a metal-free photocatalyst synthesized via a two-step method: (i) synthesis of precursor poly(amic acid) (PAA) (ii) solvothermal synthesis of polyimide through thermal imidization. The synthesis of the polyimide photocatalyst was demonstrated by the amide linkage in the FTIR spectrum. The obtained photocatalyst was semicrystalline in nature and possessed sheet-like morphology as illustrated by the diffraction pattern and the electron micrographic images, respectively. The thermogravimetric analysis of the polyimide nanosheets validated a thermally stable structure. The DFT calculations were performed which showed a suitable HOMO band position, favorable for water oxidation. The photoelectrocatalytic (PEC) performance of the polyimide nanosheets evaluated by studying water oxidation reaction without any sacrificial agent under 1-SUN showed enhanced PEC performance and good stability towards water oxidation at 0 V versus SCE.
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Affiliation(s)
- Mohd Yusuf Khan
- Center of Research Excellence in Nanotechnology, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran, 31261, Saudi Arabia
| | - Ibrahim Khan
- Center of Integrated Petroleum Research (CIPR), King Fahd University of Petroleum & Minerals (KFUPM), Dhahran, 31261, Saudi Arabia.,School of Chemical Engineering and Materials Science, Chung-Ang University, 84 Heukseok-ro, Seoul, South Korea
| | - Mostafa Zeama
- Physics Department, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran, 31261, Saudi Arabia
| | - Abuzar Khan
- Center of Research Excellence in Nanotechnology, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran, 31261, Saudi Arabia
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186
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Chen ZY, Ji TH, Xu ZM, Guan P, Jv DJ. Hydrothermally activated TiO 2 nanoparticles with a C-dot/g-C 3N 4 heterostructure for photocatalytic enhancement. NANOSCALE ADVANCES 2021; 3:4089-4097. [PMID: 36132837 PMCID: PMC9419518 DOI: 10.1039/d1na00213a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 05/23/2021] [Indexed: 05/26/2023]
Abstract
Dye degradation via photocatalysis technology has been investigated intensively to tackle environmental issues and energy crisis concerns. In this study, a newly designed ternary photocatalyst was facilely prepared by a simple one-pot hydrothermal process by directly mixing TiO2 nanoparticles with carbon dots (C-dots) and graphitic carbon nitride (g-C3N4). The optimized precursor treatments and heterostructure components show significantly enhanced photodegradation activity towards organic dyes Rhodamine B (RhB) and methylene blue (MB). Excellent photocatalytic activities were achieved owing to the better attachment of anatase-type TiO2 nanoparticle-aggregations to the C-dots/g-C3N4 (CC) nanocomposite, which impressively displays superhydrophilicity by employing the hydrothermal activation process. FT-IR spectra revealed that the hydrothermal treatment could remarkably increase the coupling interactions between TiO2 nanoparticles and the CC nanosheets within the ternary catalyst, enhancing the photocatalytic activity. Thus, it was concluded that this ternary photocatalyst is highly suitable for the remediation of dye-contaminated wastewater.
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Affiliation(s)
- Zhong-Yi Chen
- Chemistry and Material Engineering College, Beijing Technology and Business University Beijing 100048 China
| | - Tian-Hao Ji
- Chemistry and Material Engineering College, Beijing Technology and Business University Beijing 100048 China
| | - Zhe-Mi Xu
- Chemistry and Material Engineering College, Beijing Technology and Business University Beijing 100048 China
| | - Peiyuan Guan
- School of Materials Science and Engineering, University of New South Wales Sydney 2052 Australia
| | - Da-Jian Jv
- Chemistry and Material Engineering College, Beijing Technology and Business University Beijing 100048 China
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187
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Baruah K, Deb P. Electrochemically active site-rich nanocomposites of two-dimensional materials as anode catalysts for direct oxidation fuel cells: new age beyond graphene. NANOSCALE ADVANCES 2021; 3:3681-3707. [PMID: 36133025 PMCID: PMC9418720 DOI: 10.1039/d1na00046b] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 05/24/2021] [Indexed: 05/11/2023]
Abstract
Direct oxidation fuel cell (DOFC) has been opted as a green alternative to fossil fuels and intermittent energy resources as it is economically viable, possesses good conversion efficiency, as well as exhibits high power density and superfast charging. The anode catalyst is a vital component of DOFC, which improves the oxidation of fuels; however, the development of an efficient anode catalyst is still a challenge. In this regard, 2D materials have attracted attention as DOFC anode catalysts due to their fascinating electrochemical properties such as excellent mechanical properties, large surface area, superior electron transfer, presence of active sites, and tunable electronic states. This timely review encapsulates in detail different types of fuel cells, their mechanisms, and contemporary challenges; focuses on the anode catalyst/support based on new generation 2D materials, namely, 2D transition metal carbide/nitride or carbonitride (MXene), graphitic carbon nitride, transition metal dichalcogenides, and transition metal oxides; as well as their properties and role in DOFC along with the mechanisms involved.
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Affiliation(s)
- Kashmiri Baruah
- Department of Physics, Tezpur University (Central University) Napaam Tezpur 784028 Assam India
| | - Pritam Deb
- Department of Physics, Tezpur University (Central University) Napaam Tezpur 784028 Assam India
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188
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Wang J, Wang Y, Li G, Xiong Y, Zhang M, Zhang S, Zhong Q. Sodium doped flaky carbon nitride with nitrogen defects for enhanced photoreduction carbon dioxide activity. J Colloid Interface Sci 2021; 603:210-219. [PMID: 34186399 DOI: 10.1016/j.jcis.2021.06.113] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 06/18/2021] [Accepted: 06/19/2021] [Indexed: 01/23/2023]
Abstract
Sodium doped flaky carbon nitride (g-C3N4) with nitrogen defects (bmw-DCN-x) were synthesized via two steps method to enhance photocatalytic reduction of carbon dioxide (CO2). After ball milling and calcination, dicyandiamide was evenly dispersed on the sodium chloride (NaCl) template to form a flaky structure. The NaCl not only provided part of sodium (Na) source for Na doped g-C3N4, but also introduced a large number of nitrogen (N) defects. Meanwhile, sodium hydroxide (NaOH) significantly enhanced Na doping. The bmw-DCN-30, a proportion of modified g-C3N4, showed heightened photo-reduction CO2 performance, with satisfactory carbon monoxide (CO) and methane (CH4) productivity at a rate of 30.6 μmol·g-1·h-1 and 5.4 μmol·g-1·h-1 respectively. This productivity was 15 and 11 times as much as that of bulky g-C3N4 (BCN). The related characterizations confirmed that N defects produced more reactive sites and enhanced the adsorption capacity of carbon nitride to CO2. The accompanying Na doping and flaky structure characteristics improved the optical absorption ability and the effective separation of photogenerated carriers. Accordingly, this work provides further insights into constructing modified materials based on carbon nitride for CO2 reduction.
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Affiliation(s)
- Jianbo Wang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Yanan Wang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Guojun Li
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Yongheng Xiong
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Mingjia Zhang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Shule Zhang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China.
| | - Qin Zhong
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China.
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189
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Madaswamy SL, Wabaidur SM, Khan MR, Lee SC, Dhanusuraman R. Polyaniline-Graphitic Carbon Nitride Based Nano-Electrocatalyst for Fuel Cell Application: A Green Approach with Synergistic Enhanced Behaviour. Macromol Res 2021. [DOI: 10.1007/s13233-021-9044-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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190
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Sheng ZQ, Xing YQ, Chen Y, Zhang G, Liu SY, Chen L. Nanoporous and nonporous conjugated donor-acceptor polymer semiconductors for photocatalytic hydrogen production. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2021; 12:607-623. [PMID: 34285864 PMCID: PMC8261276 DOI: 10.3762/bjnano.12.50] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 06/13/2021] [Indexed: 06/13/2023]
Abstract
Conjugated polymers (CPs) as photocatalysts have evoked substantial interest. Their geometries and physical (e.g., chemical and thermal stability and solubility), optical (e.g., light absorption range), and electronic properties (e.g., charge carrier mobility, redox potential, and exciton binding energy) can be easily tuned via structural design. In addition, they are of light weight (i.e., mainly composed of C, N, O, and S). To improve the photocatalytic performance of CPs and better understand the catalytic mechanisms, many strategies with respect to material design have been proposed. These include tuning the bandgap, enlarging the surface area, enabling more efficient separation of electron-hole pairs, and enhancing the charge carrier mobility. In particular, donor-acceptor (D-A) polymers were demonstrated as a promising platform to develop high-performance photocatalysts due to their easily tunable bandgaps, high charge carrier mobility, and efficient intramolecular charge transfer. In this minireview, recent advances of D-A polymers in photocatalytic hydrogen evolution are summarized with a particular focus on modulating the optical and electronic properties of CPs by varying the acceptor units. The challenges and prospects associated with D-A polymer-based photocatalysts are described as well.
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Affiliation(s)
- Zhao-Qi Sheng
- College of Materials, Metallurgical and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Yu-Qin Xing
- College of Materials, Metallurgical and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Yan Chen
- College of Materials, Metallurgical and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Guang Zhang
- Department of Chemistry, Tianjin University, Tianjin 300072, China
| | - Shi-Yong Liu
- College of Materials, Metallurgical and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Long Chen
- Department of Chemistry, Tianjin University, Tianjin 300072, China
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191
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Wu F, Zhang Z, Cheng Z, Zhou R, Lin Y, Liu Y, Wang Y, Cao X, Liu M, Liu Y. The enhanced photocatalytic reduction of uranium(VI) by ZnS@g-C3N4 heterojunctions under sunlight. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-07784-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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192
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Hybrid nanostructures of Pd-WO 3 grown on graphitic carbon nitride for trace level electrochemical detection of paraoxon-ethyl. Mikrochim Acta 2021; 188:233. [PMID: 34145512 DOI: 10.1007/s00604-021-04866-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Accepted: 05/13/2021] [Indexed: 01/29/2023]
Abstract
Well-defined crystal structures of Pd-doped WO3 nanorods were assembled on graphitic carbon sheets (Pd-WO3/g-C3N4) for ultrasensitive detection of paraoxon-ethyl (PEL) using an electrochemical method. The electrochemical behavior of PEL on the Pd-WO3/g-C3N4 hybrid composite was investigated using cyclic voltammetry (CV) and amperometric techniques. The Pd-WO3 crystallite was seen to modify the kinetics of g-C3N4, which improved the reduction/redox peak currents of PEL at the Pd-WO3/g-C3N4 composite compared to those of the g-C3N4 and WO3/g-C3N4-modified electrode. Moreover, the π-π interaction and hydrogen bond between the PEL and Pd-WO3/g-C3N4 composite improved the charge-transfer properties. The Pd-WO3/g-C3N4 hybrid composite was therefore able to obtain an enhanced sensitivity (3.70 ± 0.05 μA μM-1 cm-2) and low detection limit (0.03 nM; S/N = 3) with a wide range of linear concentrations (0.01-60 and 80-900.0 ± 5 μM) at applied potential of - 0.63 V (vs. Ag/AgCl). The detection of PEL in agricultural water and soil samples was successfully demonstrated with satisfactory RSD of 2.5 to 3.1% and recovery results of 97 to 102%, respectively.
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193
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Han B, He XH, Liu YQ, He G, Peng C, Li JL. Asymmetric organocatalysis: an enabling technology for medicinal chemistry. Chem Soc Rev 2021; 50:1522-1586. [PMID: 33496291 DOI: 10.1039/d0cs00196a] [Citation(s) in RCA: 170] [Impact Index Per Article: 56.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The efficacy and synthetic versatility of asymmetric organocatalysis have contributed enormously to the field of organic synthesis since the early 2000s. As asymmetric organocatalytic methods mature, they have extended beyond the academia and undergone scale-up for the production of chiral drugs, natural products, and enantiomerically enriched bioactive molecules. This review provides a comprehensive overview of the applications of asymmetric organocatalysis in medicinal chemistry. A general picture of asymmetric organocatalytic strategies in medicinal chemistry is firstly presented, and the specific applications of these strategies in pharmaceutical synthesis are systematically described, with a focus on the preparation of antiviral, anticancer, neuroprotective, cardiovascular, antibacterial, and antiparasitic agents, as well as several miscellaneous bioactive agents. The review concludes with a discussion of the challenges, limitations and future prospects for organocatalytic asymmetric synthesis of medicinally valuable compounds.
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Affiliation(s)
- Bo Han
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Xiang-Hong He
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Yan-Qing Liu
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Gu He
- State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Cheng Peng
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Jun-Long Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China. and Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China.
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194
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Li Q, Song T, Zhang Y, Wang Q, Yang Y. Boosting Photocatalytic Activity and Stability of Lead-Free Cs 3Bi 2Br 9 Perovskite Nanocrystals via In Situ Growth on Monolayer 2D Ti 3C 2T x MXene for C-H Bond Oxidation. ACS APPLIED MATERIALS & INTERFACES 2021; 13:27323-27333. [PMID: 34076404 DOI: 10.1021/acsami.1c06367] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Light-driven selective oxidation of saturated C-H bonds with molecular oxygen, as an alternative to conventional thermochemical catalysis, allows a sustainable and eco-friendly manner to convert solar energy into highly value-added oxygenates. However, the photocatalytic oxidation of hydrocarbons still remains a great challenge owing to the low efficiency in the separation and transfer of photogenerated charge of the currently available photocatalytic materials. Herein, we report a novel perovskite-based heterostructure photocatalyst, in which ligand- and lead-free all-inorganic perovskite Cs3Bi2Br9 nanocrystals (NCs) with uniform crystal size and high crystallinity were homogeneously distributed on the surface of ultrathin two-dimensional (2D) monolayer Ti3C2Tx MXene nanosheets in an in situ growth manner. The resultant heterostructure featured with intimate interface between Cs3Bi2Br9 NCs and Ti3C2Tx MXene and strong visible-light adsorption not only exhibits significant enhancement in the performance of photocatalytic oxidation of challenging aromatic and aliphatic alkanes under visible-light irradiation but also greatly improves the stability of Cs3Bi2Br9 NCs under a reaction environment. Comprehensive characterizations reveal that the formation of an intimate interface between Cs3Bi2Br9 NCs and highly conductive ultrathin 2D Ti3C2Tx MXene nanosheets via strong interaction markedly accelerates the separation and transfer efficiency of photogenerated electron-hole pairs and simultaneously suppresses their recombination, resulting in improved utilization of the excited charges, which account for the highly enhanced photocatalytic performance.
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Affiliation(s)
- Qinglin Li
- CAS Key Laboratory of Bio-Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tao Song
- CAS Key Laboratory of Bio-Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- Shandong Energy Institute, Qingdao 266101, China
- Qingdao New Energy Shandong Laboratory, Qingdao 266101, China
| | - Yinpan Zhang
- CAS Key Laboratory of Bio-Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- Shandong Energy Institute, Qingdao 266101, China
- Qingdao New Energy Shandong Laboratory, Qingdao 266101, China
| | - Qi Wang
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China
| | - Yong Yang
- CAS Key Laboratory of Bio-Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- Shandong Energy Institute, Qingdao 266101, China
- Qingdao New Energy Shandong Laboratory, Qingdao 266101, China
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China
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195
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Jafarpour M, Feizpour F, Rezaeifard A, Pourmorteza N, Breit B. Tandem Photocatalysis Protocol for Hydrogen Generation/Olefin Hydrogenation Using Pd-g-C 3N 4-Imine/TiO 2 Nanoparticles. Inorg Chem 2021; 60:9484-9495. [PMID: 34133148 DOI: 10.1021/acs.inorgchem.1c00603] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An unprecedented visible-light-driven photocatalytic system consisting of Pd nanoparticles stabilized on g-C3N4-imine-functionalized TiO2 nanoparticles was discovered for photoassisted hydrogen generation followed by olefin hydrogenation under mild conditions. The structural integrity of the as-synthesized photocatalyst was corroborated by Fourier transform infrared spectroscopy, X-ray powder diffraction, energy-dispersive X-ray spectroscopy, inductively coupled plasma atomic emission spectroscopy, X-ray photoelectron spectroscopy, ultraviolet-diffuse reflectance spectroscopy, Brunauer-Emmett-Teller measurements, and thermogravimetric analysis (TGA). Transmission electron microscopy and high-resolution scanning electron microscopy revealed the nanoscopic nature of the catalyst. The photocatalyst promoted several different transformations in a one-pot reaction sequence: hydrogen evolution through photocatalytic acceptorless formation of benzimidazoles as important therapeutic agents followed by visible-light-driven photocatalytic reduction of olefins with a high hydrogen utilization efficiency of up to 92% under mild conditions. A significant volume of H2 was produced under blue light-emitting diode (LED) irradiation during the selective formation of benzimidazole, while the selectivity reduced significantly under a Xe lamp or in the dark. The in situ-generated H2 could be activated by the as-prepared Pd-C3N4-imine/TiO2 photocatalyst to effectively hydrogenate olefins under mild conditions at appropriate time exposed to blue LED irradiation. The light-dependent photocatalytic performance of the title catalyst was assessed using action spectra by calculating the apparent quantum efficiency (AQE), which exhibited the maximum AQEs at 410 and 550 nm, at which the highest performance for styrene hydrogenation was obtained. The improved photoredox activity of the title nanohybrid could be caused by the synergistic effects of the heterojunction of carbon nitride-Pd on TiO2 nanoparticles evidenced by photoluminescence spectra and catalytic reactions. The catalyst proved to be air-stable, robust, recyclable, and very active in the absence of any undesirable additives and reducing agents. Thus, this work presents a new protocol for improving the photocatalytic properties of semiconducting materials for various photocatalytic applications under environmentally friendly conditions.
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Affiliation(s)
- Maasoumeh Jafarpour
- Catalysis Research Laboratory, Department of Chemistry, Faculty of Science, University of Birjand, Birjand 97179-414, Iran.,Institut für Organische Chemie, Albert-Ludwigs-Universität-Freiburg, Albertstrasse 21, Freiburg im Breisgau 79104, Germany
| | - Fahimeh Feizpour
- Catalysis Research Laboratory, Department of Chemistry, Faculty of Science, University of Birjand, Birjand 97179-414, Iran
| | - Abdolreza Rezaeifard
- Catalysis Research Laboratory, Department of Chemistry, Faculty of Science, University of Birjand, Birjand 97179-414, Iran
| | - Narges Pourmorteza
- Catalysis Research Laboratory, Department of Chemistry, Faculty of Science, University of Birjand, Birjand 97179-414, Iran
| | - Bernhard Breit
- Institut für Organische Chemie, Albert-Ludwigs-Universität-Freiburg, Albertstrasse 21, Freiburg im Breisgau 79104, Germany
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196
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Dou W, Hu X, Kong L, Peng X. Photo-induced dissolution of Bi 2O 3 during photocatalysis reactions: Mechanisms and inhibition method. JOURNAL OF HAZARDOUS MATERIALS 2021; 412:125267. [PMID: 33548778 DOI: 10.1016/j.jhazmat.2021.125267] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 01/25/2021] [Accepted: 01/27/2021] [Indexed: 06/12/2023]
Abstract
Photo-induced dissolution greatly limits the application of Bi2O3 photocatalyst in water treatment. In this study, mechanisms for the photo-induced dissolution of Bi2O3 were proposed. (1) Under UV light, h+ forms and diffuses through Bi2O3. (2) The h+, which reaches the surface of Bi2O3 and can be regarded as a monatomic oxygen ion (OS-), is weakly bonded to the crystal lattice. (3) Two OS- combine and the generated (O-O)2- ionic group is oxidized by h+, resulting in the release of O2 and dissolution of Bi2O3. However, modification of Bi2O3 using polyaniline (PANI) greatly inhibits Bi2O3 dissolution under UV. Under the PANI to Bi2O3 mass ratio of 1.5%, the concentration of produced Bi3+ significantly decreased from 2.02 to 0.27 mg/m2 with a high methylene blue (MB) degradation efficiency of 98.3%, thanks to the separation of h+ from VB-Bi2O3 to HOMO-PANI. This study provided the theoretical foundation for the modification and application of Bi2O3 in water treatment.
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Affiliation(s)
- Wenyue Dou
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Beijing Key Laboratory of Industrial Wastewater Treatment and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xingyun Hu
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Beijing Key Laboratory of Industrial Wastewater Treatment and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Linghao Kong
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Beijing Key Laboratory of Industrial Wastewater Treatment and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Xianjia Peng
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Beijing Key Laboratory of Industrial Wastewater Treatment and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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198
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Mild adsorption of carbon nitride (C 3N 3) nanosheet on a cellular membrane reveals its suitable biocompatibility. Colloids Surf B Biointerfaces 2021; 205:111896. [PMID: 34098364 DOI: 10.1016/j.colsurfb.2021.111896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 05/26/2021] [Accepted: 05/29/2021] [Indexed: 11/22/2022]
Abstract
Recently, the novel hole-containing carbon nitride C3N3 nanomaterial was successfully synthesized, featuring outstanding and unique mechanical and electrical properties. However, to fully exploit this nanomaterial in biomedical applications, information regarding its biocompatibility is necessary. Herein, by using all-atom molecular dynamics simulations, we evaluate the interactions between a C3N3 nanosheet and a critical cellular component, that is, a lipid membrane bilayer. Our results indicate that the C3N3 nanosheet is able to interact with the lipid bilayer surface without affecting the membrane's structural integrity. Moreover, our results showed that the C3N3 nanosheet is adsorbed on the surface of the lipid bilayer without inflicting any structural damage to the membrane, regardless of the conditions of the system (that is, with and without restrains in the C3N3 nanosheet). Also, we found that both energy contributions, namely vdW and Coulomb energies, conjointly mediated the C3N3 adsorption process. In comparison and as expected, pristine graphene significantly disturbed the membrane structure. Perpendicularly-oriented-sheet simulations described the significance of the surface charges of the C3N3 nanosheet in prohibiting its insertion into the membrane. Detailed analysis indicated that the electrostatic attraction between the pores in the C3N3 structure and the lipid head amino groups stabilized the interaction restricting the insertion of the C3N3 structure deeper into the membrane. Our results suggested the importance of the negatively charged C3N3 pores when interacting with lipid membranes. Our findings shed light on the potential compatibility of C3N3 with biomembranes and its underlying molecular mechanism, which might provide a useful foundation for the future exploration of this 2D nanomaterial in biomedical applications.
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199
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Hussien MSA, Yahia IS. Hybrid multifunctional core/shell g-C 3N 4@TiO 2 heterojunction nano-catalytic for photodegradation of organic dye and pharmaceutical compounds. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:29665-29680. [PMID: 33566295 DOI: 10.1007/s11356-021-12680-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 01/22/2021] [Indexed: 06/12/2023]
Abstract
The pyrolysis of melamine was an effective one-pot method for preparing a nanostructured multifunctional photocatalytic based on core/shell g-C3N4@TiO2 heterojunction. Various techniques entirely characterized these materials: X-ray diffraction (XRD) proved to enhance the as-prepared materials' crystallinity through the variation of dislocation, strain, and crystallite size with TiO2 loading. The stacked layered/sheet-like with a smooth surface of the as-prepared samples have been shown via scanning electron microscopy (SEM). Diffuse reflectance spectroscopy (DRS) showed an apparent decrease in the energy bandgap for these nanocomposites with TiO2 loading. All the prepared materials were subjected to visible photocatalytic applications under the same conditions. The dye model (Methylene Blue, MB), and antibiotic model (Amoxicillin, AMO), was photodegraded using the as-prepared nanocomposites under visible light irradiation. In the recombination reduction among TiO2 and g-C3N4 interfaces, g-C3N4 has been effectively utilized as a matrix. Our findings proved that g-C3N4@TiO2 photocatalysts exhibited superior photocatalytic performance. CNT-5 of 2.58 eV bandgap had a higher activity of 99.7 in 50 min for MB and 100% in 20 min for AMO than the other represented photocatalysts in this work. The migration of photogenerated electrons from a g-C3N4 to TiO2 via heterojunction among them as g-C3N4 (1 0 1) removes the electrons accumulated on (1 0 1) of TiO2, improve the photodegradation efficiency. Therefore, the increase in photocatalytic reaction rates, recycling, and the sample's photostability can be considered the result of successful interactions among the TiO2 and g-C3N4 systems. The suggested photodegradation mechanism of MB and AMO was discussed in detail and compared with previously reported work. Therefore, the photodegradation rate of MB and AMO via CNT-5 composite is 6 and 3 times, respectively, higher than that of g-C3N4 under simulated solar irradiation. This research creates a new perspective on the production of nanocomposite materials in the area of treatment of pharmaceutical and dye contaminants.
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Affiliation(s)
- Mai S A Hussien
- Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo, 11757, Egypt.
- Nanoscience Laboratory for Environmental and Bio-medical Applications (NLEBA), Department of Physics, Faculty of Education, Ain Shams University, Roxy, Cairo, 11757, Egypt.
| | - Ibrahim S Yahia
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia
- Advanced Functional Materials & Optoelectronic Laboratory (AFMOL), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia
- Semiconductor Lab., Department of Physics, Faculty of Education, Ain Shams University, Roxy, Cairo, 11757, Egypt
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200
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Wei W, Li R, Huber N, Kizilsavas G, Ferguson CTJ, Landfester K, Zhang KAI. Visible Light‐Promoted Aryl Azoline Formation over Mesoporous Organosilica as Heterogeneous Photocatalyst. ChemCatChem 2021. [DOI: 10.1002/cctc.202002038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Wenxin Wei
- Max Planck Institute for Polymer Research 55128 Mainz Germany
| | - Run Li
- Max Planck Institute for Polymer Research 55128 Mainz Germany
| | - Niklas Huber
- Max Planck Institute for Polymer Research 55128 Mainz Germany
| | | | | | | | - Kai A. I. Zhang
- Max Planck Institute for Polymer Research 55128 Mainz Germany
- Department of Materials Science Fudan University Shanghai 200433 P. R. China
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