Detoxification of mustard gas surrogate on ZnO2/g-C3N4 composites: Effect of surface features’ synergy and day-night photocatalysis

Florent, Marc; Giannakoudakis, Dimitrios A.; Bandosz, Teresa J.

doi:10.1016/j.apcatb.2020.119038

Cited by 46 publications

(21 citation statements)

References 64 publications

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“…Anatase is more photoactive than are other TiO 2 polymorphs, like rutile, [49] and the co-existence of two phases in close proximity has a beneficial effect on the photoreactivity, by promoting the separation of photogenerated electrons and holes. [50] In the case of anatase-rutile interfaces, the separation of e − /h + was linked to the differences in valence and conduction energy levels, with the holes moving towards rutile and electrons-towards anatase. [51] Krylova et al showed that in core-shell-like structures consisting of a rutile shell and an amorphous core, the electrons can migrate to the core from the shell, due to the higher electron affinity of the former owing to © 2020 Wiley-VCH GmbH a lower covalent band position of the amorphous phase than that of rutile.…”

Section: Resultsmentioning

confidence: 99%

Boosting the Photoactivity of Grafted Titania: Ultrasound‐Driven Synthesis of a Multi‐Phase Heterogeneous Nano‐Architected Photocatalyst

Giannakoudakis

Qayyum

Łomot

et al. 2020

Adv Funct Materials

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The herein presented low‐power high‐frequency (500 kHz) ultrasound‐assisted precipitation synthesis (LPHF‐US) leads to a unique multiphase nano‐structured titanium dioxide, grafted with oxygen‐containing organic functionalities. The material exhibits a high porosity (surface area 326 m2 g−1 and total pores volume 0.484 cm3 g−1) and heterogeneous surface chemistry. In the used LPHF‐US synthetic protocol, the energy‐demanding calcination step leading to crystallization is eliminated and an organic residue is simultaneously grafted to the surface. That organic residue affects the anatase nanocrystals, size (4–7 nm), which are embedded in an amorphous titanium hydroxide network. This nanomaterial shows superior performance as a heterogenous photocatalyst either in a gaseous phase by decomposing toxic vapors of chemical warfare agents (a mustard‐gas surrogate), or in a liquid phase by selectively oxidizing benzyl alcohol, a model lignin‐biomass‐derived compound. The grafted organic phase enhances the catalyst's photoreactivity under visible light, by acting as a photosensitizer (antenna effect) and/or as a source of chromophores.

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Section: Resultsmentioning

confidence: 99%

Boosting the Photoactivity of Grafted Titania: Ultrasound‐Driven Synthesis of a Multi‐Phase Heterogeneous Nano‐Architected Photocatalyst

Giannakoudakis

Qayyum

Łomot

et al. 2020

Adv Funct Materials

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“…Therefore, it is highly imperative to adjust the band gaps of two different systems in the artificial Z-scheme in order to improve the synergistic effects of wide-range solar-spectrum utilization and thermodynamic pouring force for photocatalytic reactions. [24,25] Extensive research based on the metal-oxide semiconductor nanoparticles, such as zinc oxide (ZnO), [26] tin oxide (SnO 2 ), [27] indium oxide (In 2 O 3 ), [28] tungsten oxide (WO 3 ), [29] molybdenum oxide (MoO 3 ), [30] and vanadium oxide (V 2 O 5 ), [31] have been conducted to promote the photocatalytic conversion efficiency. Among these oxide materials, WO 3 , an n-type semiconductor, is deliberated as a vanguard material for photocatalysis.…”

Section: Introductionmentioning

confidence: 99%

“…Extensive research based on the metal‐oxide semiconductor nanoparticles, such as zinc oxide (ZnO), [ 26 ] tin oxide (SnO 2 ), [ 27 ] indium oxide (In 2 O 3 ), [ 28 ] tungsten oxide (WO 3 ), [ 29 ] molybdenum oxide (MoO 3 ), [ 30 ] and vanadium oxide (V 2 O 5 ), [ 31 ] have been conducted to promote the photocatalytic conversion efficiency. Among these oxide materials, WO 3 , an n‐type semiconductor, is deliberated as a vanguard material for photocatalysis.…”

Section: Introductionmentioning

confidence: 99%

Exceptional Photocatalytic Activities of rGO Modified (B,N) Co‐Doped WO₃, Coupled with CdSe QDs for One Photon Z‐Scheme System: A Joint Experimental and DFT Study

et al. 2021

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Artificial Z-scheme, a tandem structure with two-step excitation process, has gained significant attention in energy production and environmental remediation. By effectively connecting and matching the band-gaps of two different photosystems, it is significant to utilize more photons for excellent photoactivity. Herein, a novel one-photon (same energy-two-photon) Z-scheme system is constructed between rGO modified boron-nitrogen co-doped-WO 3 , and coupled CdSe quantum dots-(QDs). The coctalyst-0.5%Rh x Cr 2 O 3 (0.5RCr) modified amount-optimized sample 6%CdSe/1%rGO3%BN-WO 3 revealed an unprecedented visible-light driven overall-water-splitting to produce ≈51 μmol h −1 g −1 H 2 and 25.5 μmol h −1 g −1 O 2 , and it remained unchanged for 5 runs in 30 h. This superior performance is ascribed to the one-photon Z-scheme, which simultaneously stimulates a two photocatalysts system, and enhanced charge separation as revealed by various spectroscopy techniques. The density-functional theory is further utilized to understand the origin of this performance enhancement. This work provides a feasible strategy for constructing an efficient one-photon Z-scheme for practical applications.

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“…The obtained oxidized graphitic carbon nitride nanosphere, referred to as gCNox, showed more than double adsorption efficiency and rate of photocatalytic decomposition of toxic vapors of a surrogate of mustard gas. Going a step onward, gCNox was used as a composite feeler to synthesize novel composites based on MOF, as for instance HKUST-1 or UiO-66 phases [ 116 , 117 , 142 ] or with other inorganic nanostructures such as zinc peroxide nanoparticles (ZnO 2 /gCNox) [ 147 ]. In the case of the MOFs, their composites showed alteration of the physicochemical features important for photocatalytic applications such as improved porosity and surface chemistry heterogeneity.…”

Section: Photo- and Sono-catalytic Selective Oxidation Of Hmf And Dec...mentioning

confidence: 99%

Carbon-Based Nanocatalysts (CnCs) for Biomass Valorization and Hazardous Organics Remediation

et al. 2022

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The continuous increase of the demand in merchandise and fuels augments the need of modern approaches for the mass-production of renewable chemicals derived from abundant feedstocks, like biomass, as well as for the water and soil remediation pollution resulting from the anthropogenic discharge of organic compounds. Towards these directions and within the concept of circular (bio)economy, the development of efficient and sustainable catalytic processes is of paramount importance. Within this context, the design of novel catalysts play a key role, with carbon-based nanocatalysts (CnCs) representing one of the most promising class of materials. In this review, a wide range of CnCs utilized for biomass valorization towards valuable chemicals production, and for environmental remediation applications are summarized and discussed. Emphasis is given in particular on the catalytic production of 5-hydroxymethylfurfural (5-HMF) from cellulose or starch-rich food waste, the hydrogenolysis of lignin towards high bio-oil yields enriched predominately in alkyl and oxygenated phenolic monomers, the photocatalytic, sonocatalytic or sonophotocatalytic selective partial oxidation of 5-HMF to 2,5-diformylfuran (DFF) and the decomposition of organic pollutants in aqueous matrixes. The carbonaceous materials were utilized as stand-alone catalysts or as supports of (nano)metals are various types of activated micro/mesoporous carbons, graphene/graphite and the chemically modified counterparts like graphite oxide and reduced graphite oxide, carbon nanotubes, carbon quantum dots, graphitic carbon nitride, and fullerenes.

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Detoxification of mustard gas surrogate on ZnO2/g-C3N4 composites: Effect of surface features’ synergy and day-night photocatalysis

Cited by 46 publications

References 64 publications

Boosting the Photoactivity of Grafted Titania: Ultrasound‐Driven Synthesis of a Multi‐Phase Heterogeneous Nano‐Architected Photocatalyst

Boosting the Photoactivity of Grafted Titania: Ultrasound‐Driven Synthesis of a Multi‐Phase Heterogeneous Nano‐Architected Photocatalyst

Exceptional Photocatalytic Activities of rGO Modified (B,N) Co‐Doped WO₃, Coupled with CdSe QDs for One Photon Z‐Scheme System: A Joint Experimental and DFT Study

Carbon-Based Nanocatalysts (CnCs) for Biomass Valorization and Hazardous Organics Remediation

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Detoxification of mustard gas surrogate on ZnO2/g-C3N4 composites: Effect of surface features’ synergy and day-night photocatalysis

Cited by 46 publications

References 64 publications

Boosting the Photoactivity of Grafted Titania: Ultrasound‐Driven Synthesis of a Multi‐Phase Heterogeneous Nano‐Architected Photocatalyst

Boosting the Photoactivity of Grafted Titania: Ultrasound‐Driven Synthesis of a Multi‐Phase Heterogeneous Nano‐Architected Photocatalyst

Exceptional Photocatalytic Activities of rGO Modified (B,N) Co‐Doped WO3, Coupled with CdSe QDs for One Photon Z‐Scheme System: A Joint Experimental and DFT Study

Carbon-Based Nanocatalysts (CnCs) for Biomass Valorization and Hazardous Organics Remediation

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Exceptional Photocatalytic Activities of rGO Modified (B,N) Co‐Doped WO₃, Coupled with CdSe QDs for One Photon Z‐Scheme System: A Joint Experimental and DFT Study