51
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Juliya A, Mujeeb VA, Sreenivasan K, Muraleedharan K. Enhanced H2 evolution via photocatalytic water splitting using mesoporous TiO2/RuO2/CuO ternary nanomaterial. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY 2021. [DOI: 10.1016/j.jpap.2021.100076] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
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52
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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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53
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Evangelista AJ, Ivanchenko M, Jing H. Efficient Near-Infrared-Activated Photocatalytic Hydrogen Evolution from Ammonia Borane with Core-Shell Upconversion-Semiconductor Hybrid Nanostructures. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:3237. [PMID: 34947585 PMCID: PMC8707141 DOI: 10.3390/nano11123237] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 11/23/2021] [Accepted: 11/26/2021] [Indexed: 11/16/2022]
Abstract
In this work, the photocatalytic hydrogen evolution from ammonia borane under near-infrared laser irradiation at ambient temperature was demonstrated by using the novel core-shell upconversion-semiconductor hybrid nanostructures (NaGdF4:Yb3+/Er3+@NaGdF4@Cu2O). The particles were successfully synthesized in a final concentration of 10 mg/mL. The particles were characterized via high resolution transmission electron microscopy (HRTEM), photoluminescence, energy dispersive X-ray analysis (EDAX), and powder X-ray diffraction. The near-infrared-driven photocatalytic activities of such hybrid nanoparticles are remarkably higher than that with bare upconversion nanoparticles (UCNPs) under the same irradiation. The upconverted photoluminescence of UCNPs efficiently reabsorbed by Cu2O promotes the charge separation in the semiconducting shell, and facilitates the formation of photoinduced electrons and hydroxyl radicals generated via the reaction between H2O and holes. Both serve as reactive species on the dissociation of the weak B-N bond in an aqueous medium, to produce hydrogen under near-infrared excitation, resulting in enhanced photocatalytic activities. The photocatalyst of NaGdF4:Yb3+/Er3+@NaGdF4@Cu2O (UCNPs@Cu2O) suffered no loss of efficacy after several cycles. This work sheds light on the rational design of near-infrared-activated photocatalysts, and can be used as a proof-of-concept for on-board hydrogen generation from ammonia borane under near-infrared illumination, with the aim of green energy suppliers.
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Affiliation(s)
| | | | - Hao Jing
- Department of Chemistry and Biochemistry, George Mason University, Fairfax, VA 22030, USA; (A.J.E.); (M.I.)
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54
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Badreldin A, Nabeeh A, Ghouri ZK, Abed J, Wang N, Wubulikasimu Y, Youssef K, Kumar D, Stodolny MK, Elsaid K, Sargent EH, Abdel-Wahab A. Early Transition-Metal-Based Binary Oxide/Nitride for Efficient Electrocatalytic Hydrogen Evolution from Saline Water in Different pH Environments. ACS APPLIED MATERIALS & INTERFACES 2021; 13:53702-53716. [PMID: 34730350 DOI: 10.1021/acsami.1c13002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Using abundant seawater can reduce reliance on freshwater resources for hydrogen production from electrocatalytic water splitting. However, seawater has detrimental effects on the stability and activity of the hydrogen evolution reaction (HER) electrocatalysts under different pH conditions. In this work, we report the synthesis of binary metallic core-sheath nitride@oxynitride electrocatalysts [Ni(ETM)]δ+-[O-N]δ-, where ETM is an early transition metal V or Cr. Using NiVN on a nickel foam (NF) substrate, we demonstrate an HER overpotential as low as 32 mV at -10 mA cm-2 in saline water (0.6 M NaCl). The results represent an advancement in saline water HER performance of earth-abundant electrocatalysts, especially under near-neutral pH range (i.e., pH 6-8). Doping ETMs in nickel oxynitrides accelerates the typically rate-determining H2O dissociation step for HER and suppresses chloride deactivation of the catalyst in neutral-pH saline water. Heterointerface synergism occurs through H2O adsorption and dissociation at interfacial oxide character, while adsorbed H* proceeds via Heyrovsky or Tafel step on the nitride character. This electrocatalyst showed stable performance under a constant current density of -50 mA cm-2 for 50 h followed by additional 50 h at -100 mA cm-2 in a neutral saline electrolyte (1 M PB + 0.6 M NaCl). Contrarily, under the same conditions, Pt/C@NF exhibited significantly low performance after a mere 4 h at -50 mA cm-2. The low Tafel slope of 25 mV dec-1 indicated that the reaction is Tafel limited, unlike commercial Pt/C, which is Heyrovsky limited. We close by discussing general principles concerning surface charge delocalization for the design of HER electrocatalysts in pH saline environments.
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Affiliation(s)
- Ahmed Badreldin
- Chemical Engineering Program, Texas A&M University at Qatar, P.O. 23874 Doha, Qatar
| | - Ahmed Nabeeh
- Chemical Engineering Program, Texas A&M University at Qatar, P.O. 23874 Doha, Qatar
| | - Zafar Khan Ghouri
- Chemical Engineering Program, Texas A&M University at Qatar, P.O. 23874 Doha, Qatar
| | - Jehad Abed
- Department of Electrical and Computer Engineering, University of Toronto, Toronto M5S 3G4 Ontario, Canada
| | - Ning Wang
- Department of Electrical and Computer Engineering, University of Toronto, Toronto M5S 3G4 Ontario, Canada
| | - Yiming Wubulikasimu
- Chemical Engineering Program, Texas A&M University at Qatar, P.O. 23874 Doha, Qatar
| | - Karim Youssef
- Qatar Shell Research and Technology Centre, P.O. Box 3747 Doha, Qatar
| | - Dharmesh Kumar
- Qatar Shell Research and Technology Centre, P.O. Box 3747 Doha, Qatar
| | - Maciej K Stodolny
- Shell Global Solutions International B.V., 1031 HW Amsterdam, Netherlands
| | - Khaled Elsaid
- Chemical Engineering Program, Texas A&M University at Qatar, P.O. 23874 Doha, Qatar
| | - Edward H Sargent
- Department of Electrical and Computer Engineering, University of Toronto, Toronto M5S 3G4 Ontario, Canada
| | - Ahmed Abdel-Wahab
- Chemical Engineering Program, Texas A&M University at Qatar, P.O. 23874 Doha, Qatar
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55
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Kostelenos K, Bairamis F, Karamoschos N, Sygellou L, Andrikopoulos KS, Konstantinou I, Tasis D. Highly Efficient Simulated Solar Light-Driven Photocatalytic Degradation of 4-Nitrophenol over CdS/Carbon/MoS x Hybrids. Chemistry 2021; 27:15806-15814. [PMID: 34585791 DOI: 10.1002/chem.202103008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Indexed: 11/12/2022]
Abstract
Among the various organic pollutants and industrial chemicals, 4-nitrophenol has been one of the most monitored substances in aqueous environments, due to its enhanced solubility in such systems. This research reports for the first time the microwave-assisted synthesis of CdS/carbon/MoSx hybrids and the subsequent utilization of such systems as photocatalysts for 4-nitrophenol degradation. The hybrids demonstrated a variable photocatalytic activity, by using a variety of organic substances as precursors for the solvothermal carbonization step. By using ascorbic acid as precursor, the corresponding ternary composite exhibited excellent photocatalytic activity, with the 4-nitrophenol concentration been almost quantitatively decayed within 45 min of irradiation. This could be ascribed due to the generation of a high population of heterojunctions as well as the chemical speciation of Mo-based nanostructures. Such ternary hybrids may be utilized as potential photocatalytic systems in processes, where removal of toxic water-soluble substances is the key issue.
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Affiliation(s)
| | - Feidias Bairamis
- Department of Chemistry, University of Ioannina, Ioannina, 45110, Greece
| | | | - Lamprini Sygellou
- Institute of Chemical Engineering Sciences, Foundation of Research and Technology Hellas, Rio Patras, 26504, Greece
| | - Konstantinos S Andrikopoulos
- Institute of Chemical Engineering Sciences, Foundation of Research and Technology Hellas, Rio Patras, 26504, Greece.,Department of Physics, University of Patras, Patras, 26504, Greece
| | - Ioannis Konstantinou
- Department of Chemistry, University of Ioannina, Ioannina, 45110, Greece.,University Research Center of Ioannina (URCI), Institute of Environment and Sustainable Development, Ioannina, 45110, Greece
| | - Dimitrios Tasis
- Department of Chemistry, University of Ioannina, Ioannina, 45110, Greece.,University Research Center of Ioannina (URCI) Institute of Materials Science and Computing, Ioannina, 45110, Greece
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56
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Porcu S, Secci F, Abdullah QA, Ricci PC. 4-Nitrophenol Efficient Photoreduction from Exfoliated and Protonated Phenyl-Doped Graphitic Carbon Nitride Nanosheets. Polymers (Basel) 2021; 13:polym13213752. [PMID: 34771307 PMCID: PMC8588007 DOI: 10.3390/polym13213752] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 10/26/2021] [Accepted: 10/28/2021] [Indexed: 11/16/2022] Open
Abstract
The photoreduction of 4-nitrophenol to 4-aminophenol by means of protonated and exfoliated phenyl-doped carbon nitride is reported. Although carbon nitride-based materials have been recognized as efficient photocatalysts, the photoreduction of 4-nitrophenol to 4-aminophenol is not allowed because of the high recombination rate of the photogenerated electron–hole pairs. In this paper, we show the morphology effects on the photoactivity in phenyl-doped carbon nitride. Structural (TEM, XRD, Raman) and optical characterization (absorption, photoluminescence) of the protonated and exfoliated phenyl-doped carbon nitride (hereafter pePhCN) is reported. The increased photocatalytic efficiency, with respect to the bulk material, is underlined by the calculation of the kinetic constant of the photoreduction process (2.78 × 10−1 min−1 and 3.54 × 10−3 min−1) for pePhCN and bulk PhCN, respectively. Finally, the detailed mechanism of the photoreduction process of 4-nitrophenol to 4-aminophenol by modified phenyl carbon nitride is proposed.
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Affiliation(s)
- Stefania Porcu
- Department of Physics, University of Cagliari, 09042 Monserrato, Italy;
- Correspondence: ; Tel.: +39-340-876-8522
| | - Francesco Secci
- Department of Chemical and Geological Science, University of Cagliari, 09042 Monserrato, Italy;
| | - Qader Abdulqader Abdullah
- Department of Physics, University of Sulaimani, Kirkuk Road, Sulaimani 46001, Kurdistan Region, Iraq;
| | - Pier Carlo Ricci
- Department of Physics, University of Cagliari, 09042 Monserrato, Italy;
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57
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Gunawan D, Toe CY, Kumar P, Scott J, Amal R. Synergistic Cyanamide Functionalization and Charge-Induced Activation of Nickel/Carbon Nitride for Enhanced Selective Photoreforming of Ethanol. ACS APPLIED MATERIALS & INTERFACES 2021; 13:49916-49926. [PMID: 34652901 DOI: 10.1021/acsami.1c14195] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Photoreforming is a promising alternative to water splitting for H2 generation due to the favorable organic oxidation half-reaction and the potential to simultaneously produce solar fuel and value-added chemicals. Recently, carbon nitride has received significant attention as an inexpensive photocatalyst for the photoreforming process. However, the application of carbon nitride continues to be hampered by its poor photocatalytic performance. Herein, we report for the first time a synergistic modification of an in situ photodeposited Ni cocatalyst on carbon nitride via cyanamide functionalization and solid/liquid interfacial charge-induced activation using excess Ni2+ ions. Synergism between the cyanamide functionalization and charge-induced activation by the excess Ni2+ ions invokes enhanced activity, selectivity, and stability during ethanol photoreforming. A H2 evolution rate of 2.32 mmol h-1 g-1 in conjunction with an acetaldehyde production rate of 2.54 mmol h-1 g-1 was attained for the Ni/NCN-CN. The H2 evolution rate and elevated acetaldehyde selectivity (above 98%) remained consistent under prolonged light illumination. To understand the origin of the complementary promotional effects, the contributions of cyanamide groups and excess Ni2+ ions to selective ethanol photoreforming are decoupled and systematically investigated. The cyanamide functionality on carbon nitride was found to promote hole scavenging for the ethanol oxidation reaction, thereby enabling effective electron transfer to the Ni cocatalyst for H2 evolution. Concomitantly, excess Ni2+ ions remaining in solution created a positively charged environment on the photocatalyst surface, which improved charge carrier utilization and ethanol adsorption. The work highlights the importance of both carbon nitride functionality and charge on the photocatalyst surface in developing a selective photocatalytic reforming system.
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Affiliation(s)
- Denny Gunawan
- Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales (UNSW), Sydney, NSW 2052, Australia
| | - Cui Ying Toe
- Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales (UNSW), Sydney, NSW 2052, Australia
| | - Priyank Kumar
- Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales (UNSW), Sydney, NSW 2052, Australia
| | - Jason Scott
- Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales (UNSW), Sydney, NSW 2052, Australia
| | - Rose Amal
- Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales (UNSW), Sydney, NSW 2052, Australia
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58
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Jandam N, Serivalsatit K, Hunsom M, Pruksathorn K. Ultrasound-Assisted Synthesis of Nonmetal-Doped Titanium Dioxide Photocatalysts for Simultaneous H 2 Production and Chemical Oxygen Demand Removal from Industrial Wastewater. ACS OMEGA 2021; 6:24709-24719. [PMID: 34604653 PMCID: PMC8482470 DOI: 10.1021/acsomega.1c03483] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Indexed: 06/02/2023]
Abstract
A series of nonmetal-doped titanium dioxide (Nm x /TiO2, where x is the weight fraction of nonmetal elements) photocatalysts was prepared via ultrasonic-assisted impregnation for simultaneous hydrogen (H2) production and chemical oxygen demand (COD) removal from industrial wastewater. Three types of Nm elements, carbon (C), silicon (Si), and phosphorus (P), were explored. The P1/TiO2 exhibited a higher photocatalytic activity for H2 production and COD removal than the C1/TiO2 and Si1/TiO2 photocatalysts. Approximately 6.43 mmol/g photocatalyst of H2 was produced, and around 26% COD removal was achieved at a P1/TiO2 loading of 4.0 g/L, a light intensity of 5.93 mW/cm2, and a radiation time of 4 h. This is because the P1/TiO2 photocatalyst exhibited lower point of zero charge values and a more appropriate band position compared with other Nm x /TiO2 photocatalysts to produce H+, which can consequently form H2, and reactive oxygen species (HO· and O2 · -), which serve as oxidizing agents to degrade the organic pollutants. Increasing the content of the P element doped into the TiO2-based material up to 7.0% by weight enhanced the H2 production and COD removal up to 8.34 mmol/g photocatalyst and 50.6%, respectively. This is attributed to the combined effect of the point of zero charge value and the S BET of the prepared photocatalysts. The photocatalytic activity of the P7/TiO2 photocatalyst was still higher than the TiO2-based material after the fourth use.
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Affiliation(s)
- Natjakorn Jandam
- Fuels
Research Center, Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok 10330, Thailand
| | - Karn Serivalsatit
- Department
of Materials Science, Faculty of Science, Chulalongkorn University,Phayathai Road, Pathumwan, Bangkok 10330, Thailand
| | - Mali Hunsom
- Department
of Chemical Engineering, Faculty of Engineering, Mahidol University, Phuttamonthon 4 Road, Nakhon Pathom 73170, Thailand
- Associate
Fellow of Royal Society of Thailand (AFRST), Bangkok 10300, Thailand
| | - Kejvalee Pruksathorn
- Fuels
Research Center, Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok 10330, Thailand
- Center
of Excellence on Petrochemical and Material Technology, Chulalongkorn University, Bangkok 10330, Thailand
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59
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Zhao Y, Li Y, Sun L. Recent advances in photocatalytic decomposition of water and pollutants for sustainable application. CHEMOSPHERE 2021; 276:130201. [PMID: 33725623 DOI: 10.1016/j.chemosphere.2021.130201] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 03/03/2021] [Accepted: 03/04/2021] [Indexed: 06/12/2023]
Abstract
Photoinduced reduction and oxidation, the important processes in photocatalytic water splitting and organic degradation, have generated increasing interest to address the energy and environmental issues. In this review, the recent developments in bandgap and interfacial engineering for enhanced light absorption, efficient charge separation and interfacial reaction are focused toward the applications in photocatalytic water splitting and organic degradation. In photoinduced reduction for hydrogen evolution, three major strategies are discussed: cocatalysts, sacrificial agents and heterojunctions. In photoinduced oxidation for organic degradation, three types of emerging pollutants of current concerns are highlighted: organic dyes, pharmaceuticals and volatile organic compounds. The key challenges of promising photocatalysts are discussed for future development and practical application.
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Affiliation(s)
- Yujie Zhao
- School of Materials Science and Engineering, Beihang Unviersity, Beijing, 100191, China
| | - Yan Li
- School of Materials Science and Engineering, Beihang Unviersity, Beijing, 100191, China.
| | - Lidong Sun
- School of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China.
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60
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Beasley C, Gnanamani MK, Qian D, Hopps SD. Photocatalytic Reforming of Sucrose and Dextrose for Hydrogen Production on Pd/TiO
2. ChemistrySelect 2021. [DOI: 10.1002/slct.202101277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Charles Beasley
- University of Kentucky Center for Applied Energy Research 2540 Research Park Drive Lexington KY 40511 USA
| | - Muthu Kumaran Gnanamani
- University of Kentucky Center for Applied Energy Research 2540 Research Park Drive Lexington KY 40511 USA
| | - Dali Qian
- University of Kentucky Center for Applied Energy Research 2540 Research Park Drive Lexington KY 40511 USA
- University of Kentucky Electron Microscopy Center (EMC), ASTeCC Building 145 Graham Avenue Lexington KY 40506 USA
| | - Shelley D. Hopps
- University of Kentucky Center for Applied Energy Research 2540 Research Park Drive Lexington KY 40511 USA
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61
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The Influence of Photocatalytic Reactors Design and Operating Parameters on the Wastewater Organic Pollutants Removal—A Mini-Review. Catalysts 2021. [DOI: 10.3390/catal11050556] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The organic pollutants removal by conventional methods (adsorption, coagulation, filtration, microorganism and enzymes) showed important limitation due to the reluctance of these molecules. An alternative to this issue is represented by the photocatalytic technology considered as an advanced oxidation process (AOP). The photoreactors design and concepts vary based on the working regime (static or dynamic), photocatalyst morphology (powders or bulk) and volume. This mini-review aims to provide specific guidelines on the correlations between the photoreactor concept characteristics (working regime, volume and flow rate), irradiation scenarios (light spectra, irradiation period and intensity) and the photocatalytic process parameters (photocatalyst materials and dosage, pollutant type and concentration, pollutant removal efficiency and constant rate). The paper considers two main photoreactor geometries (cylindrical and rectangular) and analyses the influence of parameters optimization on the overall photocatalytic efficiency. Based on the systematic evaluation of the input data reported in the scientific papers, several perspectives regarding the photocatalytic reactors’ optimization were included.
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62
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Rahman A, Harunsani MH, Tan AL, Khan MM. Zinc oxide and zinc oxide-based nanostructures: biogenic and phytogenic synthesis, properties and applications. Bioprocess Biosyst Eng 2021; 44:1333-1372. [PMID: 33661388 DOI: 10.1007/s00449-021-02530-w] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 02/04/2021] [Indexed: 11/25/2022]
Abstract
Zinc oxide nanoparticles (ZnO NPs) are considered as very significant and essential material due to its multifunctional properties, stability, low cost and wide usage. Many green and biogenic approaches for ZnO NPs synthesis have been reported using various sources such as plants and microorganisms. Plants contain biomolecules that can act as capping, oxidizing and reducing agents that increase the rate of reaction and stabilizes the NPs. This review emphasizes and compiles different types of plants and parts of plant used for the synthesis of ZnO and its potential applications at one place. The influence of biogenic and phytogenic synthesized ZnO on its properties and possible mechanisms for its fabrication has been discussed. This review also highlights the potential applications and future prospects of phytogenic synthesized ZnO in the field of energy production and storage, sun light harvesting, environmental remediation, and biological applications.
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Affiliation(s)
- Ashmalina Rahman
- Chemical Sciences, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, BE 1410, Brunei Darussalam
| | - Mohammad Hilni Harunsani
- Chemical Sciences, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, BE 1410, Brunei Darussalam
| | - Ai Ling Tan
- Chemical Sciences, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, BE 1410, Brunei Darussalam
| | - Mohammad Mansoob Khan
- Chemical Sciences, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, BE 1410, Brunei Darussalam.
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63
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Construction of Bi2WO6/MoSe2/Bi12O17ClxBr2−x heterostructures for the production of hydrogen energy and degradation of methylene blue. APPLIED NANOSCIENCE 2021. [DOI: 10.1007/s13204-020-01640-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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64
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Zhurenok AV, Larina TV, Markovskaya DV, Cherepanova SV, Mel’gunova EA, Kozlova EA. Synthesis of graphitic carbon nitride-based photocatalysts for hydrogen evolution under visible light. MENDELEEV COMMUNICATIONS 2021. [DOI: 10.1016/j.mencom.2021.03.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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65
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Davis KA, Yoo S, Shuler EW, Sherman BD, Lee S, Leem G. Photocatalytic hydrogen evolution from biomass conversion. NANO CONVERGENCE 2021; 8:6. [PMID: 33635439 PMCID: PMC7910387 DOI: 10.1186/s40580-021-00256-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 02/16/2021] [Indexed: 05/03/2023]
Abstract
Biomass has incredible potential as an alternative to fossil fuels for energy production that is sustainable for the future of humanity. Hydrogen evolution from photocatalytic biomass conversion not only produces valuable carbon-free energy in the form of molecular hydrogen but also provides an avenue of production for industrially relevant biomass products. This photocatalytic conversion can be realized with efficient, sustainable reaction materials (biomass) and inexhaustible sunlight as the only energy inputs. Reported herein is a general strategy and mechanism for photocatalytic hydrogen evolution from biomass and biomass-derived substrates (including ethanol, glycerol, formic acid, glucose, and polysaccharides). Recent advancements in the synthesis and fundamental physical/mechanistic studies of novel photocatalysts for hydrogen evolution from biomass conversion are summarized. Also summarized are recent advancements in hydrogen evolution efficiency regarding biomass and biomass-derived substrates. Special emphasis is given to methods that utilize unprocessed biomass as a substrate or synthetic photocatalyst material, as the development of such will incur greater benefits towards a sustainable route for the evolution of hydrogen and production of chemical feedstocks.
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Affiliation(s)
- Kayla Alicia Davis
- Department of Chemistry, State University of New York College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, NY, 13210, USA
| | - Sunghoon Yoo
- Department of Chemistry, Gachon University, Seongnam, Gyeonggi-do, 13306, Republic of Korea
- Department of Chemical and Molecular Engineering, Hanyang University, Ansan, Gyeonggi-do, 15588, Republic of Korea
| | - Eric W Shuler
- Department of Chemistry, State University of New York College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, NY, 13210, USA
| | - Benjamin D Sherman
- Department of Chemistry and Biochemistry, Texas Christian University, Campus Box 298860, Fort Worth, TX, 76129, USA
| | - Seunghyun Lee
- Department of Chemical and Molecular Engineering, Hanyang University, Ansan, Gyeonggi-do, 15588, Republic of Korea.
| | - Gyu Leem
- Department of Chemistry, State University of New York College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, NY, 13210, USA.
- The Michael M. Szwarc Polymer Research Institute, 1 Forestry Drive, Syracuse, NY, 13210, USA.
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66
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Hierarchical Ternary Sulfides as Effective Photocatalyst for Hydrogen Generation Through Water Splitting: A Review on the Performance of ZnIn2S4. Catalysts 2021. [DOI: 10.3390/catal11020277] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
One of the major aspects and advantages of solar energy conversion is the photocatalytic hydrogen generation using semiconductor materials for an eco-friendly technology. Designing a low-cost efficient material to overcome limited light absorption as well as rapid recombination of photogenerated charge carriers is essential to achieve considerable hydrogen generation. In recent years, sulfide based semiconductors have attracted scientific research interest due to their excellent solar response and narrow band gap. The present review focuses on the recent approaches in the development of hierarchical ternary sulfide based photocatalysts with a special focus on ZnIn2S4. We also observe how the electronic structure of ZnIn2S4 is beneficial for water splitting and the various strategies involved for improving the material efficiency for photocatalytic hydrogen generation. The review places emphasis on the latest advancement/new insights on ZnIn2S4 being used as an efficient material for hydrogen generation through photocatalytic water splitting. Recent progress on essential aspects which govern light absorption, charge separation and transport are also discussed in detail.
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67
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Nagakawa H, Nagata M. Elucidating the Factors Affecting Hydrogen Production Activity Using a CdS/TiO 2 Type-II Composite Photocatalyst. ACS OMEGA 2021; 6:4395-4400. [PMID: 33644552 PMCID: PMC7906583 DOI: 10.1021/acsomega.0c05749] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 01/20/2021] [Indexed: 06/12/2023]
Abstract
CdS/TiO2 is a composite photocatalyst that has been studied over many years and in which electron transfer from CdS to TiO2 is believed to lead to high photocatalytic activity. However, most reports on improved activity involve hydrogen production in the presence of a sulfide reducing agent. In this study, we comprehensively examined the effects of electron transfer, hydrogen overvoltage, substrate adsorption, and the cocatalyst from relationships between hydrogen production ability and the total number of trapped electrons in the presence of various reducing agents. As a result, we clarified that the electron transfer between CdS and TiO2 does not necessarily lead to high activity. We showed that the composite photocatalyst needs to be designed for the intended purpose and that evaluating the hydrogen production ability using sacrificial reagents provides insufficient information for use in an actual environment.
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Affiliation(s)
- Haruki Nagakawa
- Department of Industrial Chemistry, Graduate School of Engineering, Tokyo University of Science, 12-1 Ichigayafunagawara-cho, Shinjuku-ku, Tokyo 162-0826, Japan
| | - Morio Nagata
- Department of Industrial Chemistry, Graduate School of Engineering, Tokyo University of Science, 12-1 Ichigayafunagawara-cho, Shinjuku-ku, Tokyo 162-0826, Japan
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68
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Wastewater Contaminated with Hydrazine as Scavenger Agent for Hydrogen Production by Cu/Ti Nanostructures. Catalysts 2021. [DOI: 10.3390/catal11010074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Cu/Ti photocatalysts were prepared by the sol-gel process with different copper loadings (1.0, 2.5, and 5.0 wt.%) and then thermally treated at several calcination temperatures from 400 to 600 °C. The materials were characterized by X-ray diffraction (XRD), N2 physisorption, Scanning Electronic Microscopy with Energy Dispersive X-ray Spectroscopy (SEM-EDS), Ultraviolet-visible-Diffuse Reflection Spectroscopy, Ultraviolet-visible spectroscopy as a function of the temperature, (Temperature Programmed Reduction) TPR-chemisorption, XPS (X-ray Photoelectron Spectroscopy) and OH determination through DRIFTS (Diffuse reflectance infrared Fourier transform spectroscopy). The Cu/Ti photocatalysts were evaluated for the photocatalytic production of hydrogen using hydrazine as scavenging agent. Moreover, a detailed study of the Cu1+/Cu2+ ratio and the corresponding formation of copper oxide was carried out to understand the correlation between the copper species and the photocatalytic activity. Simultaneously, the OH groups on the TiO2 surface also show insights into the behavior of these materials during the photocatalytic reaction. Despite the low hydrazine concentration (20 mM), the 1.0 (wt.%) Cu/Ti 500 photocatalyst enhanced the hydrogen production three and two times more than photolysis and bare TiO2, respectively. The 1.0 Cu/Ti 500 photocatalyst displayed outstanding stability for at least three continuous cycles of 8 h each, preserving the hydrogen production. The novel ability shown in this work represents an alternative to reduce the hydrazine residues in wastewater to transform it into a hydrogen-producing energy source and must be extended to other reductive pollutants found in wastewater.
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69
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Larder RR, Bennett TM, Blankenship LS, Fernandes JA, Husband BK, Atkinson RL, Derry MJ, Toolan DTW, Centurion HA, Topham PD, Gonçalves RV, Taresco V, Howdle SM. Porous hollow TiO2 microparticles for photocatalysis: exploiting novel ABC triblock terpolymer templates synthesised in supercritical CO2. Polym Chem 2021. [DOI: 10.1039/d1py00334h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the synthesis of phase separated PMMA-b-PS-b-P4VP microparticles via RAFT-mediated dispersion polymerisation in scCO2 and their use as a structure-directing agent for the fabrication of TiO2 microparticles for photocatalysis.
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70
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Zhurenok AV, Markovskaya DV, Gerasimov EY, Cherepanova SV, Bukhtiyarov AV, Kozlova EA. Composite photocatalysts based on Cd 1−xZn xS and TiO 2 for hydrogen production under visible light: effect of platinum co-catalyst location. RSC Adv 2021; 11:37966-37980. [PMID: 35498100 PMCID: PMC9044054 DOI: 10.1039/d1ra06845h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 11/16/2021] [Indexed: 11/21/2022] Open
Abstract
Ternary composite photocatalysts based on titania and solid solutions of CdS and ZnS were prepared and studied by a set of physicochemical methods including XRD, XPS, HRTEM, UV-vis spectroscopy, and electrochemical tests. Two synthetic techniques of platinization of Cd1−xZnxS/TiO2 were compared. In the first case, platinum was deposited on the surface of synthesized Cd1−xZnxS (x = 0.2–0.3)/TiO2 P25; in the second one, Cd1−xZnxS (x = 0.2–0.3) was deposited on the surface of Pt/TiO2 P25. The photocatalytic properties of the obtained samples were compared in the hydrogen evolution from TEOA aqueous solution under visible light (λ = 425 nm). The Cd1−xZnxS (10–50 wt%; x = 0.2–0.3)/Pt (1 wt%)/TiO2 photocatalysts demonstrated much higher photocatalytic activity than the Pt (1 wt%)/Cd1−xZnxS (10–50 wt%; x = 0.2–0.3)/TiO2 ones. It turned out that the arrangement of platinum nanoparticles precisely on the titanium dioxide surface in a composite photocatalyst makes it possible to achieve efficient charge separation according to the type II heterojunctions and, accordingly, a high rate of hydrogen formation. The highest photocatalytic activity was demonstrated by 20% Cd0.8Zn0.2S/1% Pt/TiO2 in the amount of 26 mmol g−1 h−1 (apparent quantum efficiency was 7.7%) that exceeds recently published values for this class of photocatalysts. The determination of the preferred location of platinum particles in TiO2–Cd1−xZnxS systems was carried out for the first time.![]()
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Affiliation(s)
- Angelina V. Zhurenok
- Federal Research Center Boreskov Institute of Catalysis, 630090, Pr. Ak. Lavrentieva, 5, Novosibirsk, Russia
| | - Dina V. Markovskaya
- Federal Research Center Boreskov Institute of Catalysis, 630090, Pr. Ak. Lavrentieva, 5, Novosibirsk, Russia
| | - Evgeny Yu. Gerasimov
- Federal Research Center Boreskov Institute of Catalysis, 630090, Pr. Ak. Lavrentieva, 5, Novosibirsk, Russia
| | - Svetlana V. Cherepanova
- Federal Research Center Boreskov Institute of Catalysis, 630090, Pr. Ak. Lavrentieva, 5, Novosibirsk, Russia
| | - Andrey V. Bukhtiyarov
- Federal Research Center Boreskov Institute of Catalysis, 630090, Pr. Ak. Lavrentieva, 5, Novosibirsk, Russia
| | - Ekaterina A. Kozlova
- Federal Research Center Boreskov Institute of Catalysis, 630090, Pr. Ak. Lavrentieva, 5, Novosibirsk, Russia
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71
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Comparative Study of Zn2Ti3O8 and ZnTiO3 Photocatalytic Properties for Hydrogen Production. Catalysts 2020. [DOI: 10.3390/catal10121372] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In the present work, zinc titanates (ZTO) as photocatalysts were synthesized, characterized, and evaluated aiming to study their photocatalytic properties for hydrogen production under visible-light irradiation and employing MeOH (methanol) and TEOA (Triethanolamine) as sacrificial agents. ZTO were synthesized by modified Pechini method. Characterization of materials consisted in TGA, XRD, TEM, EELS, BET, and UV–Vis. Surface interaction studies consisted of FT-IR spectroscopy and determination of MeOH and TEOA adsorption–desorption capacities on the ZTO by TGA. Zinc titanates were evaluated as photocatalyst for H2 production using an artificial visible light and monitored by GC. TGA results led to establish calcination temperatures of 550 °C (Zn2Ti3O8) and 700 °C (ZnTiO3) to reach their crystalline phases. XRD analysis of sample cds-ZTO found cubic Zn2Ti3O8 and traces of the ZnO crystalline phase, while p-ZTO exhibited a mixture of cubic and hexagonal ZnTiO3 crystalline phases. Surface area for cds-ZTO was 88 m2/g, while ZnTiO3 had 13 m2/g. Photocatalytic H2 production for cds-ZTO and p-ZTO using TEOA as sacrificial agent showed the highest photocatalytic activities generating 548 and 441 µmolH2/h.gcat. TEOA adsorption–desorption capacity was found superior on cds-ZTO and p-ZTO than that for MeOH on both samples.
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72
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Piccolo L, Afanasiev P, Morfin F, Len T, Dessal C, Rousset JL, Aouine M, Bourgain F, Aguilar-Tapia A, Proux O, Chen Y, Soler L, Llorca J. Operando X-ray Absorption Spectroscopy Investigation of Photocatalytic Hydrogen Evolution over Ultradispersed Pt/TiO2 Catalysts. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03464] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- L. Piccolo
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, F-69626 Villeurbanne, France
| | - P. Afanasiev
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, F-69626 Villeurbanne, France
| | - F. Morfin
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, F-69626 Villeurbanne, France
| | - T. Len
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, F-69626 Villeurbanne, France
| | - C. Dessal
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, F-69626 Villeurbanne, France
| | - J. L. Rousset
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, F-69626 Villeurbanne, France
| | - M. Aouine
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, F-69626 Villeurbanne, France
| | - F. Bourgain
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, F-69626 Villeurbanne, France
| | - A. Aguilar-Tapia
- Université Grenoble Alpes, CNRS, Institut Néel, F-38000 Grenoble, France
| | - O. Proux
- Université Grenoble Alpes, CNRS, OSUG, F-38041 Grenoble, France
| | - Y. Chen
- Institute of Energy Technologies, Department of Chemical Engineering and Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, EEBE, Eduard Maristany 16, 08019 Barcelona, Spain
| | - L. Soler
- Institute of Energy Technologies, Department of Chemical Engineering and Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, EEBE, Eduard Maristany 16, 08019 Barcelona, Spain
| | - J. Llorca
- Institute of Energy Technologies, Department of Chemical Engineering and Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, EEBE, Eduard Maristany 16, 08019 Barcelona, Spain
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73
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Samsudin MFR, Frebillot C, Kaddoury Y, Sufian S, Ong WJ. Bifunctional Z-Scheme Ag/AgVO 3/g-C 3N 4 photocatalysts for expired ciprofloxacin degradation and hydrogen production from natural rainwater without using scavengers. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 270:110803. [PMID: 32721291 DOI: 10.1016/j.jenvman.2020.110803] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 05/01/2020] [Accepted: 05/18/2020] [Indexed: 06/11/2023]
Abstract
To maximize the employment of sustainable solar energy in treating the recalcitrant pollutant and hydrogen energy production, the development of a highly efficient photocatalyst is desirable. Herein, a Z-scheme Ag/AgVO3/g-C3N4 photocatalyst was synthesized via a wet-impregnation method. The amount of Ag/AgVO3 deposited onto g-C3N4 has a significant effect on the photocharge carrier separation and migration of the as-developed Z-scheme photocatalyst. It was found that 0.5 wt % Ag/AgVO3/g-C3N4 photocatalyst exhibited a profound photocatalytic degradation performance with 82.6% ciprofloxacin removal and 3.57 mmol/h of hydrogen produced from natural rainwater under visible-light irradiation. Additionally, the apparent quantum efficiency (AQE) of this sample was 9.95% at 420 nm which is four times higher than the pure sample. The remarkable photocatalytic performance was attributed to the enhanced crystallographic structure, evidently from the XRD and XPS analysis. Moreover, the intimate contact between Ag/AgVO3 and g-C3N4 nanoparticles allows the smooth photocharge carrier separation and migrations, resulting in superior photocatalytic performance in comparison to the pure samples. Interestingly, the profound photocatalytic activity demonstrated here was achieved without the addition of any sacrificial reagents. This work demonstrates the feasibility of utilizing visible-light-driven photocatalysts in treating the recalcitrant antibiotic pollutants and producing hydrogen from natural rainwater.
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Affiliation(s)
| | - Chloe Frebillot
- DUT Science et Genie des Materiaux, Institut Universitaire et Technologique de Chalon-sur-Saone, 71100, Chalon-sur-Saone, Bourgogne, France
| | - Yasser Kaddoury
- Université de Bourgogne, ESIREM, 9 Av. Alain Savary, BP 47 870, 21000, Dijon, France
| | - Suriati Sufian
- Chemical Engineering Department, Universiti Teknologi PETRONAS, 32610, Bandar Seri Iskandar, Perak, Malaysia; Centre of Innovative Nanostructures & Nanodevices (COINN), Universiti Teknologi PETRONAS, 32610, Bandar Seri Iskandar, Perak, Malaysia.
| | - Wee-Jun Ong
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China; School of Energy and Chemical Engineering, Xiamen University Malaysia, Selangor Darul Ehsan, 43900, Malaysia.
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74
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Wang X, Zheng X, Han H, Fan Y, Zhang S, Meng S, Chen S. Photocatalytic hydrogen evolution from biomass (glucose solution) on Au/CdS nanorods with Au3+ self-reduction. J SOLID STATE CHEM 2020. [DOI: 10.1016/j.jssc.2020.121495] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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75
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Poschmann M, Groß H, Amin R, Fritsch C, Dankwort T, Radinger H, Indris S, Kienle L, Bensch W. CuCo
2
S
4
Deposited on TiO
2
: Controlling the pH Value Boosts Photocatalytic Hydrogen Evolution. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000555] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Michael Poschmann
- Institute of Inorganic Chemistry Kiel University Max‐Eyth Straße 2 24118 Kiel Germany
| | - Hendrik Groß
- Institute of Materials Science Kiel University Kaiserstraße 2 24143 Kiel Germany
| | - Reza Amin
- Department of Chemistry Faculty of Sciences University of Guilan Rasht Guilan Iran
| | - Charlotte Fritsch
- Institute for Applied Materials Karlsruhe Institute of Technology (KIT) Hermann‐von‐Helmholtz‐Platz 1 76344 Eggenstein‐Leopoldshafen Germany
| | - Torben Dankwort
- Institute of Materials Science Kiel University Kaiserstraße 2 24143 Kiel Germany
| | - Hannes Radinger
- Institute for Applied Materials Karlsruhe Institute of Technology (KIT) Hermann‐von‐Helmholtz‐Platz 1 76344 Eggenstein‐Leopoldshafen Germany
| | - Sylvio Indris
- Institute for Applied Materials Karlsruhe Institute of Technology (KIT) Hermann‐von‐Helmholtz‐Platz 1 76344 Eggenstein‐Leopoldshafen Germany
| | - Lorenz Kienle
- Institute of Materials Science Kiel University Kaiserstraße 2 24143 Kiel Germany
| | - Wolfgang Bensch
- Institute of Inorganic Chemistry Kiel University Max‐Eyth Straße 2 24118 Kiel Germany
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76
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Bowker M, Jones W. Methanol photo-reforming with water on pure titania for hydrogen production. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2020; 378:20200058. [PMID: 32623989 PMCID: PMC7422889 DOI: 10.1098/rsta.2020.0058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/21/2020] [Indexed: 06/11/2023]
Abstract
The behaviour of titania for the photo-reforming of methanol with water at ambient temperature has been examined. It is shown that the reactivity is very poor, compared with metal-loaded catalysts at low methanol levels in solution, but the rate becomes much higher at high methanol levels, such that the difference from metal-loaded samples is much less. The optimum yield is with approximately a 1 : 1 methanol/water solution. The reaction also proceeds well in the gas phase. During all such catalysis, the titania becomes blue, due to light absorption increasing across the range 400-800 nm. However, this does not result in visible range activity for the photo-reforming and is due to the reduction of the material in the presence of light and the formation of anion vacancies and Ti3+ centres. These anion vacancies are only very slowly re-oxidized in air on P25 titania, taking days to recover the original whiteness of the oxide. The performance of anatase, rutile and the mixed phase is compared. This article is part of a discussion meeting issue 'Science to enable the circular economy'.
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Affiliation(s)
- M. Bowker
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, UK
- The UK Catalysis Hub, Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell, Oxon OX11 0FA, UK
| | - W. Jones
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, UK
- The UK Catalysis Hub, Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell, Oxon OX11 0FA, UK
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77
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Bhawna, Gupta A, Kumar P, Tyagi A, Kumar R, Kumar A, Singh P, Singh RP, Kumar V. Facile Synthesis of N‐Doped SnO
2
Nanoparticles: A Cocatalyst‐Free Promising Photocatalyst for Hydrogen Generation. ChemistrySelect 2020. [DOI: 10.1002/slct.202001301] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Bhawna
- Department of Chemistry, Kirori Mal CollegeUniversity of Delhi India
- Department of ChemistryUniversity of Delhi India
| | - Akanksha Gupta
- Department of Chemistry, Sri Venkateswara CollegeUniversity of Delhi India
| | - Prashant Kumar
- Department of Metallurgical Engineering and Material ScienceIndian Institute of Technology Bombay, Powai Mumbai India
| | - Adish Tyagi
- Chemistry DivisionBhabha Atomic Research Centre (BARC) Mumbai India
| | - Ravinder Kumar
- Department of ChemistryGurukula Kangri Vishwavidyalaya Haridwar India
| | - Ashwani Kumar
- Nanoscience Laboratory Institute CentreIndian Institute of Technology Roorkee India
| | - Prashant Singh
- Department of ChemistryAtma Ram Sanatan Dharma College, Delhi University New Delhi India
| | - R. P. Singh
- Department of Chemistry, Sri Venkateswara CollegeUniversity of Delhi India
| | - Vinod Kumar
- Department of Chemistry, Kirori Mal CollegeUniversity of Delhi India
- Special Centre for Nano SciencesJawaharlal Nehru University Delhi India
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78
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Preparation and Photocatalytic Properties of Heterostructured Ceria/Polyaniline Nanoparticles. Catalysts 2020. [DOI: 10.3390/catal10070732] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Cerium dioxide (CeO2, ceria), a promising and abundant catalytic material with high-efficiency, nontoxicity, photochemical stability, and affordability, can be used as a photocatalyst to photocatalytically degrade organics and split water for hydrogen production under ultraviolet (UV) irradiation (about 5% of solar energy). However, the applications of the CeO2 photocatalyst are limited due to low photocatalytic efficiency under sunlight irradiation. In this study, a nanosized CeO2 powder was prepared by the precipitation method. Subsequently, various amounts of polyaniline (PANI) nanoparticles were deposited onto the surface of the CeO2 nanoparticles to form a heterostructure by the polymerization method. The crystal structure, morphology, surface and optical properties of the CeO2/PANI nanoparticles were investigated by X-ray diffractometry (XRD), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), ultraviolet-visible (UV-Vis) absorption spectroscopy, and photoluminescence (PL). Experimental results demonstrated that PANI deposition improved the light absorption of CeO2 nanoparticles in the visible light region. The heterostructured CeO2/PANI nanoparticle with 4 wt % PANI deposition exhibited optimal photocatalytic activities with a hydrogen production rate of 462 μmolg−1 within 6 h and a methyl orange (MO) degradation rate of 45% within 4 h under visible light irradiation. The photocatalytic mechanisms of the composite powder are also proposed in this report.
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79
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Abstract
Solar energy conversion is one of the sustainable technologies that tackles the global warming and energy crisis [...]
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80
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Tzompantzi-Flores C, Castillo-Rodríguez JC, Gómez R, Pérez Hernández R, Santolalla-Vargas CE, Tzompantzi F. Photocatalytic Evaluation of the ZrO2:Zn5(OH)6(CO3)2 Composite for the H2 Production via Water Splitting. Top Catal 2020. [DOI: 10.1007/s11244-020-01236-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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81
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Pudkon W, Bahruji H, Miedziak PJ, Davies TE, Morgan DJ, Pattisson S, Kaowphong S, Hutchings GJ. Enhanced visible-light-driven photocatalytic H2 production and Cr(vi) reduction of a ZnIn2S4/MoS2 heterojunction synthesized by the biomolecule-assisted microwave heating method. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00234h] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photocatalytic applications of flower-like ZnIn2S4/MoS2 composite, synthesized by biomolecule-assisted microwave heating method, in H2 evolution and Cr(vi) reduction reactions.
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Affiliation(s)
- Watcharapong Pudkon
- Department of Chemistry
- Faculty of Science
- Chiang Mai University
- Chiang Mai 50200
- Thailand
| | - Hasliza Bahruji
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | - Peter J. Miedziak
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | - Thomas E. Davies
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | - David J. Morgan
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | - Samuel Pattisson
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | - Sulawan Kaowphong
- Department of Chemistry
- Faculty of Science
- Chiang Mai University
- Chiang Mai 50200
- Thailand
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82
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Kahng S, Yoo H, Kim JH. Recent advances in earth-abundant photocatalyst materials for solar H2 production. ADV POWDER TECHNOL 2020. [DOI: 10.1016/j.apt.2019.08.035] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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83
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Feng J, Yang F, Ye Y, Wang W, Yao X, Fan Q, Liu L, Aleisa RM, Guo J, Yin Y. Surface-bound sacrificial electron donors in promoting photocatalytic reduction on titania nanocrystals. NANOSCALE 2019; 11:19512-19519. [PMID: 31573006 DOI: 10.1039/c9nr05453g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Titania nanocrystals have been investigated for fast color switching through photocatalytic reduction of dyes and hexacyanometalate pigments. Here we reveal that direct binding of sacrificial electron donors (SEDs) to the surface of titania nanocrystals can significantly promote the charge transfer rate by more efficiently scavenging photogenerated holes and releasing more photogenerated electrons for reduction reactions. Using diethylene glycol (DEG) as an example, we show that its binding to the nanoparticle surface, which can be achieved either during or after the nanoparticle formation, greatly enhances the photocatalytic reduction in comparison with the case where free DEG molecules are simply added as external SEDs.
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Affiliation(s)
- Ji Feng
- Department of Chemistry, University of California, Riverside, CA 92521, USA.
| | - Fan Yang
- Department of Chemistry, University of California, Riverside, CA 92521, USA.
| | - Yifan Ye
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Wenshou Wang
- National Engineering Research Center for Colloidal Materials, School of Chemistry and Chemical Engineering, Shandong University, Ji'Nan 250100, P.R. China
| | - Xiaxi Yao
- School of Chemistry and Materials Engineering, Changshu Institute of Technology, Changshu 215500, P. R. China
| | - Qingsong Fan
- Department of Chemistry, University of California, Riverside, CA 92521, USA.
| | - Luntao Liu
- National Engineering Research Center for Colloidal Materials, School of Chemistry and Chemical Engineering, Shandong University, Ji'Nan 250100, P.R. China
| | - Rashed M Aleisa
- Department of Chemistry, University of California, Riverside, CA 92521, USA.
| | - Jinghua Guo
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Yadong Yin
- Department of Chemistry, University of California, Riverside, CA 92521, USA.
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84
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Modified Nimo Nanoparticles for Efficient Catalytic Hydrogen Generation from Hydrous Hydrazine. Catalysts 2019. [DOI: 10.3390/catal9070596] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Precious metal-free NiMoM (M = Pr2O3, Cu2O) catalysts have been synthesized through a simple coreduction method, without any surfactant or support material, and characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The resultant Pr2O3- or Cu2O-modified NiMo catalysts exhibit different structures, which is due to a difference in the synergistic effects of NiMo and the modifying elements. NiMoPr2O3 has an amorphous structure, with low crystallinity and uniform particle dispersion, while NiMo@Cu2O adopts the core–shell structure, where the core and shell are synergistic with each other to promote electron transfer efficiency. The support material-free nanocatalysts Ni9Mo1(Pr2O3)0.375 and Ni4Mo@Cu2O are both highly efficient compared with bimetallic NiMo catalysts, in terms of hydrogen generation from hydrous hydrazine (N2H4·H2O) at 343 K, with total turnover frequencies (TOFs) of 62 h−1 and 71.4 h−1, respectively. Their corresponding activation energies (Ea) were determined to be 43.24 kJ mol−1 and 46.47 kJ mol−1, respectively. This is the first report on the use of Pr-modified NiMo and core–shell NiMo@Cu2O catalysts, and these results may be used to promote the effective application of noble metal-free nanocatalysts for hydrogen production from hydrous hydrazine.
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Sumesh CK, Peter SC. Two-dimensional semiconductor transition metal based chalcogenide based heterostructures for water splitting applications. Dalton Trans 2019; 48:12772-12802. [DOI: 10.1039/c9dt01581g] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recent research and development is focused in an intensive manner to increase the efficiency of solar energy conversion into electrical energy via photovoltaics and photo-electrochemical reactions.
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Affiliation(s)
- C. K. Sumesh
- Department of Physical Sciences
- P. D. Patel Institute of Applied Sciences
- Charotar University of Science and Technology (CHARUSAT)
- Changa-388421
- India
| | - Sebastian C. Peter
- New Chemistry Unit
- Jawaharlal Nehru Centre for Advanced Scientific Research
- Bengaluru 560064
- India
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