Enhanced near-visible-light photocatalytic removal of formaldehyde over Au-assisted ZnSn(OH)6 microcubes

Pham, Minh-Thuan; Bui, Dai‐Phat; Lin, In-Fu; Phương, Nguyễn Hoàng; Huang, Yu; Cao, Junji; You, Sheng‐Jie; Wang, Ya-Fen

doi:10.1016/j.eti.2020.101112

Cited by 17 publications

(24 citation statements)

References 37 publications

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“…Figure 3a shows the FTIR spectra of 1%, 5%, 10%, 20% and 30% of Ag:cZHS and cZHS, the tracing region in the range from 400-4000 cm − 1 . The wide peak observed in 3800 cm − 1 to 2750 cm − 1 shows OH bending and stretching vibrations [12]. Besides, the sharp peak appears at 1170 cm − 1 , attributed to Sn -OH deformation vibration [28].…”

Section: Materials Characterizationsmentioning

confidence: 99%

“…Extensive research on photocatalytic NO x removal from ambient air or ue gas has been performed using various methods, such as selective catalytic reduction, selective non-catalytic reduction, bio ltration, adsorption, absorption, and absorption photocatalytic [8][9][10][11]. Among them, photocatalytic materials have attracted much attention due to their great potential, including eco-friendly, low-cost, high e ciency, and non-toxic [12,13]. A wide range of photocatalysts has been studied for NOx gas removals, such as Bi 2 O 3 [14], ZnSn(OH) 6 [15], g-C 3 N 4 [16], SnO 2 [17] and TiO 2 [18].…”

Section: Introductionmentioning

confidence: 99%

“…However, its wide bandgap (~ 3.7 eV) remains the key challenge for the wide-spread use of ZnSn(OH) 6 in visible light [15]. Therefore, several methods have been performed to reduce the bandgap, including the combination with noble metals (Au, Ag, Cu), metal oxides (ZnO, SnO 2 ) [12,19,20], and non-metals (C, S) [21,22]. The metal decoration is one of the best ways to signi cantly enhance the photocatalytic performance for NO x gas removal through the surface plasmon resonance (SPR) effect [23,24].…”

Section: Introductionmentioning

confidence: 99%

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Enhanced photocatalytic removal of nitric oxide over Ag-decorated ZnSn(OH)6 microcubes

Pham¹,

Vân²,

Nguyen³

et al. 2021

Preprint

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Presently, most of the population has been facing a string of severe climate change problems that primarily come from the intensive emission of nitric oxide (NO), which requires a practical approach to sustain our living conditions. Herein, Ag nanoparticles-decorated ZnSn(OH)6 microcubes (Ag:cZHS) photocatalysts were synthesized rapidly and used for photocatalytic NO removal under solar light activation. The properties of the newly prepared photocatalysts are comprehensively characterized by a series of routine methods. The NO removal performance over the ZnSn(OH)6 microcubes (c:ZHS) photocatalysts was increased markedly upon being combined with Ag nanoparticles through the surface plasmon resonance effect. The contribution of e−, h+, •OH, and •O2 was extensively investigated through trapping tests and electron spin resonance analysis (ESR). Also, the by-products and apparent quantum efficiency of the cZHS photocatalysts were studied.

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Section: Materials Characterizationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced photocatalytic removal of nitric oxide over Ag-decorated ZnSn(OH)6 microcubes

Pham¹,

Vân²,

Nguyen³

et al. 2021

Preprint

Self Cite

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“…ZHS has ultraviolet (UV) light response and fast recombination of photogenerated carriers, which explains its low photoactivity and stability. Several viable approaches are reported to overcome this restriction, such as element doping [13,14], morphology control [15,16], noble metal deposition [17,18], and construction of heterojunctions [19,20]. The latter, in particular, allows to obtain feasible ZHS photocatalysts with good efficiency for the spatial separation of electron-hole pairs [21], and is one of the most promising methodologies used for improving the performance of the pristine materials [22].…”

Section: Introductionmentioning

confidence: 99%

Creation of an internal electric field in SnO2@ZnS-ZnSn(OH)6 dual-type-II heterojunctions for efficient NO photo-oxidation

Chen

Ouyang

et al. 2023

Sci. China Mater.

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Well-designed heterojunction photocatalysts are promising high-performance materials, effective in inducing charge transfer to achieve a particular migration path and long-lasting carriers. However, the traditional binary heterojunction photocatalysts still show low-efficiency charge separation. Herein, we report a direct dual-type-II SnO 2 @ZnS-ZHS (ZHS = ZnSn(OH) 6 ) ternary heterojunction, obtained by a facile in-situ face-to-face growth approach. Experimental results and density functional theory calculations reveal that the carrier dynamics of SnO 2 @ZnS-ZHS, with dual-type-II mechanisms, enables the photogenerated holes (h + ) of SnO 2 to migrate to the valence bands of ZHS and ZnS. This ensures that SnO 2 @ZnS-ZHS has twice as much oxidizing potential to produce enough hydroxyl radicals (•OH) to participate in NO oxidation reactions. With a unique dual-type-II ternary structure, SnO 2 @ZnS-ZHS shows the highest NO removal rate (44.5%) after 30 min, which is 23.5, 29.7 and 15.9 times higher than the values shown by the single components ZHS, SnO 2 and ZnS, respectively. A reaction mechanism is proposed. The improved photocatalytic activity shows the advantages of the SnO 2 @ZnS-ZHS heterostructure as a promising candidate for ternary heterojunction design.

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“…were used as effective scavengers of the holes, hydroxyl radicals, and photogenerated electrons, respectively, in this procedure. The kinetics K= (ln(C/Co))/t of the photocatalysts were measured using the obvious first-order rate constant k (min -1 ) of NO (ppbV) at the initial C0, and C is the final concentration at different time (min) (Pham et al, 2020).…”

Section: Pollutant Photocatalytic Degradation Measurementsmentioning

confidence: 99%

Photodegradation of Nitrogen Oxide under Solar Light Using a Facile Synthesis Catalyst

Fenelon

You

Wang

2021

Aerosol Air Qual. Res.

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NOx is becoming a hot issue due to its contribution to ozone, PM2.5 formation, and its negative impacts on the ecosystem. In this study, the synthesis of an MgO/Bi2S3-BiOCl composite was carried out via the co-precipitation method for the photodegradation of nitrogen oxide (NO) under solar light. The BiOCl heterojunction is a result of interactions between the Bi2S3 solution and the MgCl2.6H2O precursor. This BiOCl heterojunction provides more available active species that enhance the degradation of NO. The successful synthesis of this composite using a co-precipitation method was confirmed by different characterization analyses (XRD, FTIR, SEM, TEM, DRS, and ESR). The photocatalytic degradation of NO under solar light using 7% MgO/Bi2S3-BiOCl reached an efficiency of 74.6%, which was better than that obtained using pure Bi2S3 (42.8%) and MgO (11.2%). The reusability test showed that the 7% MgO/Bi2S3-BiOCl material was maintained stability in the photodegradation of NO even after five cycles.The trapping test showed that the holes (h + ) and hydroxyl ( • OH -) were the main active factors in the photodegradation process. The findings of this study confirmed that MgCl2.6H2O is a suitable precursor leading to improvements in the performance of Bi2S3 for the purpose of promoting a new composite that can be used in the photodegradation of NO and could be a candidate for practical applications.

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Enhanced near-visible-light photocatalytic removal of formaldehyde over Au-assisted ZnSn(OH)6 microcubes

Cited by 17 publications

References 37 publications

Enhanced photocatalytic removal of nitric oxide over Ag-decorated ZnSn(OH)6 microcubes

Enhanced photocatalytic removal of nitric oxide over Ag-decorated ZnSn(OH)6 microcubes

Creation of an internal electric field in SnO2@ZnS-ZnSn(OH)6 dual-type-II heterojunctions for efficient NO photo-oxidation

Photodegradation of Nitrogen Oxide under Solar Light Using a Facile Synthesis Catalyst

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