Synthesis and photocatalytic properties of three dimensional laminated structure anatase TiO<sub>2</sub>/nano-Fe<sup>0</sup> with exposed (001) facets

Dong, Yanan; Meng, Fanjun

doi:10.1039/d0ra01429j

Cited by 4 publications

(1 citation statement)

References 69 publications

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“…It is widely used in the degradation of organic pollutants [28], heavy metals [29], dye-sensitized solar cells [26], biomedical fields [27]. However, anatase (TiO 2 ) particles have defects such as low utilization of visible light and easy recombination of photogenerated electrons and holes [30]. With improvements in synthesis technology and further study of the crystal structure of anatase (TiO 2 ), theoretical and experimental studies have shown that anatase (TiO 2 ) with exposed (001) facets has high photocatalytic activity [31].…”

Section: Introductionmentioning

confidence: 99%

Adsorption and Mechanism of Glycine on the Anatase with Exposed (001) and (101) Facets

et al. 2022

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As a widely existing mineral types on Earth, semiconductor minerals play an important role in the origin of life and the material geochemical cycle. The first step of peptide formation is amino acid adsorption on the mineral surface, but the role and mechanism of different crystal facets of semiconductor minerals are not well understood. Anatase (TiO2) with exposed (001) facets was synthesized by a hydrothermal method, and then analyzed and compared with the purchased ordinary anatase (TiO2) for the adsorption of glycine, the simplest amino acid. XRD, SEM and TEM results show that the hydrothermally synthesized anatase (TiO2) has a good anatase crystal form, which is micro-nano-scale flake particles and mainly composed of (001) facets. The results of HPLC used in the adsorption experiment showed that under optimal conditions (pH 5 to 6, an adsorption time of 24 h, and an initial concentration of 0.09 mol/L), the adsorption quantity of glycine on anatase (TiO2) with exposed (001) facets may reach 10 mg/m2, which is larger than that for ordinary anatase (TiO2) with exposed (101) facets. Based on a combination of various characterizations and simulation calculations, the results proved that anatase can activate thermodynamically stable γ-glycine to β-glycine. The adsorption of glycine on anatase (TiO2) has two forms, one is the zwitterionic form in which the carboxyl group forms a bridge structure with two Ti atoms connected by surface bridging oxygen, and the dissociated form is in which the amino group forms a bond with the surface Ti atom. Among these, glycine is mainly adsorbed to anatase by dissociative molecules on the anatase (TiO2) with exposed (001) facets and by zwitterion adsorption on the anatase (TiO2) with exposed (101) facets. This research elucidates the conditions and mechanism of amino acid adsorption by semiconductor minerals in weak acidic environment, which is similar to the environmental pH that was beneficial to the formation of life on the early Earth. Therefore, these can provide a reference for the further study of the role of semiconductor minerals in the adsorption and polymerization of small biomolecules in the origin of life.

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Section: Introductionmentioning

confidence: 99%

Adsorption and Mechanism of Glycine on the Anatase with Exposed (001) and (101) Facets

et al. 2022

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New consideration on the application of nano-zero-valent iron (nZVI) in groundwater remediation: refractions to existing technologies

Xu,

Zanli,

Chen

2024

J Nanopart Res

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TiO2 nanoflower photocatalysts: Synthesis, modifications and applications in wastewater treatment for removal of emerging organic pollutants

Chakraborty

Samriti

Ruzimuradov

et al. 2022

Environmental Research

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Synthesis and photocatalytic properties of three dimensional laminated structure anatase TiO₂/nano-Fe⁰ with exposed (001) facets

Abstract: Three dimensional laminated structure anatase TiO2/nano-Fe0 with exposed (001) facets were successfully synthesized, which exhibited higher photocatalytic performance in the photocatalytic degradation of methylene blue.

Cited by 4 publications

References 69 publications

Adsorption and Mechanism of Glycine on the Anatase with Exposed (001) and (101) Facets

Adsorption and Mechanism of Glycine on the Anatase with Exposed (001) and (101) Facets

New consideration on the application of nano-zero-valent iron (nZVI) in groundwater remediation: refractions to existing technologies

TiO2 nanoflower photocatalysts: Synthesis, modifications and applications in wastewater treatment for removal of emerging organic pollutants

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Synthesis and photocatalytic properties of three dimensional laminated structure anatase TiO2/nano-Fe0 with exposed (001) facets

Abstract: Three dimensional laminated structure anatase TiO2/nano-Fe0 with exposed (001) facets were successfully synthesized, which exhibited higher photocatalytic performance in the photocatalytic degradation of methylene blue.

Cited by 4 publications

References 69 publications

Adsorption and Mechanism of Glycine on the Anatase with Exposed (001) and (101) Facets

Adsorption and Mechanism of Glycine on the Anatase with Exposed (001) and (101) Facets

New consideration on the application of nano-zero-valent iron (nZVI) in groundwater remediation: refractions to existing technologies

TiO2 nanoflower photocatalysts: Synthesis, modifications and applications in wastewater treatment for removal of emerging organic pollutants

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Synthesis and photocatalytic properties of three dimensional laminated structure anatase TiO₂/nano-Fe⁰ with exposed (001) facets