Fabrication of Fe-doped TiO2 nanoparticles and investigation of photocatalytic decolorization of reactive red 198 under visible light irradiation
TL;DR: Among the samples, Fe-1wt% doped TiO2 nanoparticles showed the highest photocatalytic decolorization of RR198 under visible light irradiation.
About: This article is published in Ultrasonics Sonochemistry.The article was published on 2016-09-01 and is currently open access. It has received 136 citations till now. The article focuses on the topics: Visible spectrum & Photocatalysis.
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TL;DR: The main degradation by-products were recognized by GC-MS method to propose the possible sonocatalytic mechanism for the degradation of ciprofloxacin (CIP) and the stability of the nanocomposite was studied.
172 citations
Cites background from "Fabrication of Fe-doped TiO2 nanopa..."
...hkl denotes the crystal plane index, and a, b and c represent lattice parameters (for the tetragonal anatase phase of TiO2, a b c = ≠ ) [34]....
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TL;DR: An overview of current research into the development, synthesis, photocatalytic bacterial activity, biocompatibility and cytotoxic properties of various visible-light active titanium dioxide (TiO2) nanoparticles (NPs) and their nanocomposites is provided.
Abstract: This article provides an overview of current research into the development, synthesis, photocatalytic bacterial activity, biocompatibility and cytotoxic properties of various visible-light active titanium dioxide (TiO2) nanoparticles (NPs) and their nanocomposites. To achieve antibacterial inactivation under visible light, TiO2 NPs are doped with metal and non-metal elements, modified with carbonaceous nanomaterials, and coupled with other metal oxide semiconductors. Transition metals introduce a localized d-electron state just below the conduction band of TiO2 NPs, thereby narrowing the bandgap and causing a red shift of the optical absorption edge into the visible region. Silver nanoparticles of doped TiO2 NPs experience surface plasmon resonance under visible light excitation, leading to the injection of hot electrons into the conduction band of TiO2 NPs to generate reactive oxygen species (ROS) for bacterial killing. The modification of TiO2 NPs with carbon nanotubes and graphene sheets also achieve the efficient creation of ROS under visible light irradiation. Furthermore, titanium-based alloy implants in orthopedics with enhanced antibacterial activity and biocompatibility can be achieved by forming a surface layer of Ag-doped titania nanotubes. By incorporating TiO2 NPs and Cu-doped TiO2 NPs into chitosan or the textile matrix, the resulting polymer nanocomposites exhibit excellent antimicrobial properties that can have applications as fruit/food wrapping films, self-cleaning fabrics, medical scaffolds and wound dressings. Considering the possible use of visible-light active TiO2 nanomaterials for various applications, their toxicity impact on the environment and public health is also addressed.
107 citations
Cites background from "Fabrication of Fe-doped TiO2 nanopa..."
...Metals Ti Ti3+, oxygen vacancy [106,107] Mn Mn2+ [92] Fe Fe3+ [93,95] Ni Ni2+ [110] Cu Cu2+ [109] V V4+ [88] Mo Mo6+ [111,112] Ce Ce3+ [121,122] Mo and W Mo6+, W6+ [114] V and Co V4+, Co2+ [90] Fe and Co Fe3+, Co2+ [115]...
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...Similarly, Fe3+ ions of Fe-doped TiO2 can also act as hole and electron traps in prohibiting the recombination of the electron–hole pair and promoting ROS generation [84–86]....
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TL;DR: The stability test through chronoamperometry showed that S- biVO4 was more stable than H-BiVO4, and it can be depicted from the growth mechanism that ultrasonication played a definite role in the overall synthesis of pseudo-flower shaped S-Bi VO4 MAs.
92 citations
TL;DR: Progress has been summarized in the development of heterogeneousTiO2-based photocatalysts for MC-LR photodegradation under visible, UV, or solar light and some main modification methods for improving the drawbacks and performance of TiO2 nanoparticle were highlighted.
85 citations
TL;DR: Photoelectrocatalytic experimental results indicate that stratified WO3/TiO2 photoelectrode is the promising material for removing of water pollutants.
84 citations
References
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TL;DR: In this article, Nitrogen-doped TiO2 nanocatalysts with a homogeneous anatase structure were successfully synthesized through a microemulsion−hydrothermal method by using some organic compounds such as triethylamine, urea, thiourea, and hydrazine hydrate.
Abstract: Nitrogen-doped TiO2 nanocatalysts with a homogeneous anatase structure were successfully synthesized through a microemulsion−hydrothermal method by using some organic compounds such as triethylamine, urea, thiourea, and hydrazine hydrate. Analysis by Raman and X-ray photoemission spectroscopy indicated that nitrogen was doped effectively and most nitrogen dopants might be present in the chemical environment of Ti−O−N and O−Ti−N. A shift of the absorption edge to a lower energy and a stronger absorption in the visible light region were observed. The results of photodegradation or the organic pollutant rhodamine B in the visible light irradiation (λ > 420 nm) suggested that the TiO2 photocatalysts after nitrogen doping were greatly improved compared with the undoped TiO2 photocatalysts and Degussa P-25; especially the nitrogen-doped TiO2 using triathylamine as the nitrogen source showed the highest photocatalytic activity, which also showed a higher efficiency for photodecomposition of 2,4-dichlorophenol. T...
961 citations
"Fabrication of Fe-doped TiO2 nanopa..." refers background in this paper
...The optical band gap can be expressed by a Tauc equation and Kubelka-Munk function [32]: (F(R)hυ)=A(hυ-Eg) (5)...
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TL;DR: In this article, a novel adsorbent, zinc oxide nanoparticle loaded on activated carbon (ZnO-NP-AC) was synthesized by a simple, low cost and efficient procedure.
338 citations
"Fabrication of Fe-doped TiO2 nanopa..." refers background in this paper
...Their properties such as large surface area, high number of reactive atoms and large number of vacant reactive surface sites make them one of the incomparable photocatalysts[11-12]....
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TL;DR: Fe3+-doped TiO2 (Fe-TiO2) porous microspheres were prepared by controlled hydrolysis of Ti(OC4H9)4 with water generated "in situ" via an esterification reaction between acetic acid and ethanol, followed by hydrothermal treatment.
317 citations
TL;DR: Graphene/carbon composite nanofibers (CCNFs) with attached TiO2 nanoparticles (TiO2-CCNF) were prepared, and their photocatalytic degradation ability under visible light irradiation was assessed.
273 citations
"Fabrication of Fe-doped TiO2 nanopa..." refers background in this paper
...Broadly speaking, the lower the PL intensity demonstrates the lower recombination rate of the photogenerated electron-hole pairs, which leads to the higher photocatalytic activity [37]....
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TL;DR: Analysis of experimental adsorption data to various kinetic models such as pseudo-first and second order, Elovich and intraparticle diffusion models show the applicability of the second-order equation model.
267 citations
"Fabrication of Fe-doped TiO2 nanopa..." refers background in this paper
...Their properties such as large surface area, high number of reactive atoms and large number of vacant reactive surface sites make them one of the incomparable photocatalysts[11-12]....
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