Solar photocatalytic activity of TiO2 modified with WO3 on the degradation of an organophosphorus pesticide

Ramos-Delgado, Norma Alicia; Gracia-Pinilla, M.A.; Maya-Treviño, L.; Hinojosa‐Reyes, Laura; Guzmán-Mar, Jorge Luis; Hernández-Ramírez, Aracely

doi:10.1016/j.jhazmat.2013.07.058

Cited by 165 publications

(54 citation statements)

References 44 publications

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“…A weak band centered at around 795 cm −1 in inset of Fig. 2 with the intensity gradually enhanced with the increase of WO 3 /TiO 2 mass ratios is assigned to the O W O stretching vibrations [41], revealing the presence of trace mount of monoclinic WO 3 in composites. Fig.…”

Section: Resultsmentioning

confidence: 94%

“…Eventually, the sample 8%WTS0.7 is deemed as the most efficient candidate among WTS series. The apparent reaction rate constants were calculated by means of a pseudo-first-order kinetic equation simplified from the well-known Langmuir-Hinshelwood kinetic model in quite diluted solutions [12], as shown in Fig. 7C and D. As expected, among WTS series sample 8%WTS0.7 is of the largest apparent reaction rate constant that is approximately 1.2, 2.1, 2.2, and 5.7 times as high as 8%WS, TS0.7, WO 3 /TiO 2 , and N-TiO 2 , respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Especially, it is a suitable candidate to fabricate composites with TiO 2 to create heterojunction structures that facilitate the transfer and separation of photoinduced electrons and holes and hereby inhibit the recombination of charge carriers [9][10][11]. Accordingly, band-gap shrinkage was observed in composites on account of the formation of heterojunction structures [12].…”

Section: Introductionmentioning

confidence: 99%

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Enhanced visible-light-driven photocatalytic performance of mesoporous W-Ti-SBA-15 prepared through a facile hydrothermal route

Chang

Wang

Luo

et al. 2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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h i g h l i g h t s• A series of tungsten-titaniumcocontained SBA15 composites were fabricated by a simple synthetic route.• These samples showed enhanced catalytic performance in comparison to those comprising bare tungsten or titanium component.• The enhancement of photocatalytic behavior under visible-light irradiation was discussed. t r a c tA facile and one-step hydrothermal procedure was adopted to fabricate a series of W-Ti-SBA15 composites (WTS). These as-prepared composites were systematically characterized by a collection of analytic and spectroscopic techniques. It was found that dual phases of titanium and tungsten species coexisted in mesoporous structures of p6 mm hexagonal symmetry. In addition, these composites were visible-light responsive and exhibited enhanced photocatalytic capability toward degradation of Rhodamine B (RhB) and 2,4-dichlorophenol (2,4-DCP) upon visible-light irradiation in comparison to samples containing single component of titanium or tungsten species. Specifically, the best candidate, sample 8%WTS0.7, had the largest apparent reaction rate constant that was nearly 1.2, 2.1, 2.2, and 5.7 times as high as those of 8%WS, TS0.7, WO 3 /TiO 2 , and N-TiO 2 , respectively. The enhancement of photocatalytic performance was mainly attributed to the well-matched band structures of both components and strengthened visiblelight adsorption ability, originating from the combination of titania with highly acidic WO 3 in SBA15 matrix with large specific surface areas. Active radical species were detected by trapping experiments and a possible photocatalytic mechanism was thus proposed.

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced visible-light-driven photocatalytic performance of mesoporous W-Ti-SBA-15 prepared through a facile hydrothermal route

Chang

Wang

Luo

et al. 2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…As a result, under the identical condition sample AB4 is the best candidate among all samples and provide a maximal catalytic degradation efficiency of 93%. The apparent reaction rate constants were estimated through a pseudo-first-order kinetic equation that was simplified from the Langmuir-Hinshelwood kinetic model in diluted solutions [33], and are listed in Table 1. Correspondingly, the sample AB4 has the largest apparent reaction rate constant value that is almost 5.3 and 8.2 times as high as the samples AB0 and N-TiO 2 , as also shown in Fig.…”

Section: Fig 3 Sem Images Of Composites Ab0 (A) and Ab4(b) And Thementioning

confidence: 99%

Ag/Bi12O17Cl2 composite: A case study of visible-light-driven plasmonic photocatalyst

Chang

Wang

Luo

et al. 2017

Molecular Catalysis

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a b s t r a c tIn this investigation, novel Ag/Bi 12 O 17 Cl 2 plasmonic composites with different Ag contents were constructed through a solvothermal and subsequent photoreduction route and fully characterized by a collection of analytical techniques. Spectroscopic results confirmed the presence and uniform dispersion of Ag nanoparticles on the 2D nanosheets of Bi 12 O 17 Cl 2 . The Ag content in composites exerted considerable influence on the extension of light-adsorption range and the enlargement of specific surface areas. The photocatalytic abilities of these Ag/Bi 12 O 17 Cl 2 composites were evaluated toward the degradation of rhodamine B (RhB) and 2,4-dichlorophenol (2,4-DCP) under the visible-light irradiation. The results demonstrated that the Ag/Bi 12 O 17 Cl 2 composites showed much higher photocatalytic efficiencies than that of pure Bi 12 O 17 Cl 2 , especially the sample with an optimal Ag content showing the best photocatalytic behavior among all tested samples. The remarkable enhancement of Ag/Bi 12 O 17 Cl 2 photocatalytic efficiency could be mainly attributed to the efficient charge separation that was induced by the localized surface plasmon resonance effect of metallic Ag, strong visible-light adsorption and the favorable morphology with enlarged specific surface areas. Eventually, the photocatalysis mechanism over Ag/Bi 12 O 17 Cl 2 composites was preliminarily proposed on the base of reactive species trapping experiments.

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“…With the advancement of material science and the evolution of synthetic methodologies allowing strict control of phase, size, and dispersion [22], now, it is possible to control the photocatalytic properties [23,24]. TiO 2 -coated windows and tiles are examples of self-cleaning materials; such materials have been used inside and outside to help the urban control of air pollutants.…”

Section: Advanced Technique: Sol-gel and Aerosolmentioning

confidence: 99%

Industrial synthesis and characterization of nanophotocatalysts materials: titania

Ramos-Delgado

Gracia-Pinilla

Mangalaraja

et al. 2016

Nanotechnology Reviews

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Despite the recent synthesis and identification of a diverse set of new nanophotocatalysts that has exploded recently, titanium dioxide (TiO 2 ) remains among the most promising photocatalysts because it is inexpensive, non-corrosive, environmentally friendly, and stable under a wide range of conditions. TiO 2 has shown excellent promise for solar cell applications and for remediation of chemical pollutants and toxins. Over the past few decades, there has been a tremendous development of nanophotocatalysts for a variety of industrial applications (i.e. for water purification and reuse, disinfection of water matrices, air purification, deodorization, sterilization of soils). This paper details traditional and new industrial routes for the preparation of nanophotocatalysts and the characterization techniques used to understand the physical chemical properties of them, like surface area, ζ potential, crystal size, and phase crystallographic, morphology, and optical transparency. Finally we present some applications of the industrial nanophotocatalysts.

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Solar photocatalytic activity of TiO2 modified with WO3 on the degradation of an organophosphorus pesticide

Cited by 165 publications

References 44 publications

Enhanced visible-light-driven photocatalytic performance of mesoporous W-Ti-SBA-15 prepared through a facile hydrothermal route

Enhanced visible-light-driven photocatalytic performance of mesoporous W-Ti-SBA-15 prepared through a facile hydrothermal route

Ag/Bi12O17Cl2 composite: A case study of visible-light-driven plasmonic photocatalyst

Industrial synthesis and characterization of nanophotocatalysts materials: titania

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