Nitrogen-doped TiO2 nanoparticles by using EDTA as nitrogen source and soft template: Simple preparation, mesoporous structure, and photocatalytic activity under visible light

Nitrophenols (NPs) and related derivatives are industrially important chemicals, used notably to synthesize pharmaceuticals, insecticides, herbicides, and pesticides. However, NPs and their metabolites are highly toxic and mutagenic. They pose a serious threat to human health and ecosystem. Current work was undertaken to develop a suitable visible-light active catalyst for the sustainable and efficient mineralization of NPs in an aqueous environment. Nanocrystalline cellulose (NCs)-based nitrogen-doped titanium dioxide and carbonaceous material (N-TiO 2 /C) was synthesized by pyrolysis and sol–gel methods using NCs, polydopamine, and TiO 2 . The synthesized N-TiO 2 /C was characterized using different analytical techniques. Photocatalytic degradation of NPs under visible light indicated that acidic pH (3) was most suitable for the optimal degradation. 4-NP degradation followed both pseudo-first-order ( R 2 = 0.9985) and Langmuir–Hinshelwood adsorption kinetic models (adsorption constant, K LH = 1.13 L mg –1 ). Gas chromatography–mass spectrometry and ion chromatography analysis confirmed the total mineralization of 4-NP into smaller molecular fragments such as acids, alcohols, and nitrates. The total organic carbon showed that 67% of total carbon present in 4-NP was mineralized into CO 2 and CO. The catalyst was recycled for five consecutive cycles without losing its catalytic activities. The degradation mechanism of NPs with N-TiO 2 /C was also explored.

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“…The decrease in binding energy of pure TiO 2 from 459.54 to 458.68 eV is due to the N-doping to TiO 2 . 18…”

Section: Resultsmentioning

confidence: 99%

Nanocrystalline Cellulose-Derived Doped Carbonaceous Material for Rapid Mineralization of Nitrophenols under Visible Light

et al. 2018

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“…Modification of TiO 2 to improve the photocatalytic efficiency of TiO 2 under sunlight visible irradiation is necessary. The modification by non-metal [36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51] and metal doping on TiO 2 has been attempted. The metal doping agents introduced for TiO 2 are transition metals (Fe, Cu, Cr, Co, and Ni) [52][53][54][55][56] and noble metals (Ag, Au, Pd, and Pt) .…”

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticle Incorporated Titanium Oxide for Bacterial Inactivation and Dye Degradation

Wahyuni¹,

Roto²

2018

Titanium Dioxide - Material for a Sustainable Environment

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This chapter deals with preparation and characterization of silver nanoparticles incorporated in titania or TiO 2-AgNP in short and its performance study as a visible light responsive photocatalyst for bacterial inactivation and dye degradation. The preparation of TiO 2-AgNP performed by several methods including sol-gel, impregnation, precipitation, and photocatalytic deposition is described. Characterizations by XRD, XPS, FTIR, DRUV, and SEM/TEM machines to confirm the formation of the metallic silver nanoparticle, as well as the shape and size, and to follow the interaction between Ag atoms and other atoms in the crystal lattice of TiO 2, are presented. Further, the antibacterial performance and dye degradation activity of TiO 2-AgNP, both under UV and visible light, are described.

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“…Amines have been widely used as sources of nitrogen for doping in mp-TiO 2 [151][152][153][154][155][156][157][158][159]. Nassoko et al synthesized nitrogen-doped mp-TiO 2 (N-mp-TiO 2 ) nanoparticles by a sol-gel method using ethylene-diaminetetraacetic acid as both a soft template and a source of nitrogen [153].…”

Section: Aminesmentioning

confidence: 99%

“…Nassoko et al synthesized nitrogen-doped mp-TiO 2 (N-mp-TiO 2 ) nanoparticles by a sol-gel method using ethylene-diaminetetraacetic acid as both a soft template and a source of nitrogen [153]. The resulting N-mp-TiO 2 nanoparticles showed enhanced rhodamine B degradation under visible light irradiation.…”

Section: Aminesmentioning

confidence: 99%

Synthesis and Catalytic Applications of Non-Metal Doped Mesoporous Titania

et al. 2017

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Mesoporous titania (mp-TiO 2 ) has drawn tremendous attention for a diverse set of applications due to its high surface area, interfacial structure, and tunable combination of pore size, pore orientation, wall thickness, and pore connectivity. Its pore structure facilitates rapid diffusion of reactants and charge carriers to the photocatalytically active interface of TiO 2 . However, because the large band gap of TiO 2 limits its ability to utilize visible light, non-metal doping has been extensively studied to tune the energy levels of TiO 2 . While first-principles calculations support the efficacy of this approach, it is challenging to efficiently introduce active non-metal dopants into the lattice of TiO 2 . This review surveys recent advances in the preparation of mp-TiO 2 and their doping with non-metal atoms. Different doping strategies and dopant sources are discussed. Further, co-doping with combinations of non-metal dopants are discussed as strategies to reduce the band gap, improve photogenerated charge separation, and enhance visible light absorption. The improvements resulting from each doping strategy are discussed in light of potential changes in mesoporous architecture, dopant composition and chemical state, extent of band gap reduction, and improvement in photocatalytic activities. Finally, potential applications of non-metal-doped mp-TiO 2 are explored in water splitting, CO 2 reduction, and environmental remediation with visible light.

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Nitrogen-doped TiO2 nanoparticles by using EDTA as nitrogen source and soft template: Simple preparation, mesoporous structure, and photocatalytic activity under visible light

Cited by 60 publications

References 43 publications

Nanocrystalline Cellulose-Derived Doped Carbonaceous Material for Rapid Mineralization of Nitrophenols under Visible Light

Nanocrystalline Cellulose-Derived Doped Carbonaceous Material for Rapid Mineralization of Nitrophenols under Visible Light

Silver Nanoparticle Incorporated Titanium Oxide for Bacterial Inactivation and Dye Degradation

Synthesis and Catalytic Applications of Non-Metal Doped Mesoporous Titania

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