Synthesis and characterization of Mg doped TiO2 nanoparticles for photocatalytic applications

Athira, K.; Merin, K.T.; Raguram, T.; Rajni, K S

doi:10.1016/j.matpr.2020.04.580

Cited by 13 publications

(9 citation statements)

References 31 publications

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“…The samples exhibit similar XRD curves for both samples, and all the diffraction peaks can be indexed to the TiO2 anatase powder that is being used for the synthesis. For MgS-2, the TiO2 crystals in the form of rutile were found at around 27.42° (R110), 36.12° (R200), 41.28° (R111), and 54.0° (R220) [26]. The XRD analysis of MgS-2 revealed that the anatase phase accounted for 31% of the sample, whereas the rutile phase accounted for 18%.…”

Section: Characterization Of Mgs-tio2mentioning

confidence: 98%

Enhanced Effect of Metal Sulfide Doping (MgS-TiO2) Nanostructure Catalyst on Photocatalytic Reduction of CO2 to Methanol

et al. 2023

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The conversion of CO2 gas from the global emission to methanol can be a route to look at in addressing greenhouse gas (GHG) issues. Photocatalysis has been attracting attention in the conversion of CO2 to methanol, as it is seen to be one of the most viable, economic, and sustainable strategies. The biggest hindrance to the use of metal oxide photocatalysts was the poisoning by sulfur content in the CO2 gas feedstock. Therefore, in the development of photocatalysts using metal oxide-based additives, the metal needs to be in the form of metal sulfides to avoid catalyst poisoning due to the presence of H2S. The magnesium sulfide-based TiO2 (MgS-TiO2) photocatalyst has not been synthesized and studied for its photocatalytic potential. In this study, a novel MgS-TiO2 photocatalyst was synthesized using a combination of wet impregnation and hydrothermal method and characterized to determine the physical and chemical properties of the photocatalyst. Characterization results have shown the presence of MgS on the native TiO2 photocatalyst. The optimization of MgS-TiO2 formulation was conducted, wherein the MgS and TiO2 ratio of 0.5 wt % has been shown to give the highest methanol yield of 229.1 μmol/g·h. The photocatalytic parameter optimization results showed that temperature and catalyst loading were the most important factors that impacted the photocatalytic process. In contrast, reaction time had the least significant effect on the CO2 photocatalytic reduction to methanol. This concludes that the MgS-TiO2 photocatalyst has potential and can be used for the photocatalytic reduction of CO2 to methanol.

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Section: Characterization Of Mgs-tio2mentioning

confidence: 98%

Enhanced Effect of Metal Sulfide Doping (MgS-TiO2) Nanostructure Catalyst on Photocatalytic Reduction of CO2 to Methanol

et al. 2023

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“…6a). This shift may be resulted from the substitutional doping of TiO 2 by Zn and Mg which was inturn caused by an extra energy level band formed above the valence band by replacing Ti 4+ in TiO 2 by Mg 2+ [33]. The mixing of Mg (2p) with O (2p) orbital which facilitate electron excitement in visible region [14].…”

Section: Uv-vis-diffuse Re Ectance Spectroscopymentioning

confidence: 99%

Biogenic surfactant mediated facile synthesis of visible light sensitized Zn/Mg co-doped TiO2 Nanomaterials– A Green approach: Evaluation of photocatalytic activity by degradation of Amido Black 10B

Tirukkovalluri

Jaishree

Divya

et al. 2022

Preprint

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Visible light driven Zn and Mg co-doped TiO2 nanomaterials were synthesized by varying dopant concentrations in presence of biogenic surfactant Sapindus emerginatus biogenic extract via Solgel method and has been successfully applicated to the degradation of Amido Black 10B, an exemplary anionic textile azo dye pollutant. In this study, explored the potent capping properties of biogenic extract surfactant by encapsulating the Zn/Mg co-doped TiO2. In a view to assess the physical and optical properties of as synthesized catalyst, various advanced instrumental techniques were adopted. The Transmission Electron Microscopy and Scanning Electron Microscopy analysis shows the formation of small particle size (6.92 nm) and rough surface respectively pertaining to ZMT4S2. The substitutional doping of Zn and Mg into TiO2 framework by substituting Ti4+ ion and the encapsulation of surfactant around catalyst was confirmed by Fourier Transform-Infrared Spectroscopy (FTIR) spectral studies. The surface area of the ZMT4S2 was found to be high (195.20 m2 g−1) as compared with undoped TiO2 (32.50 m2 g−1) and ZMT4 (7.02 m2 g−1). The red shift in the absorbance was observed for all the catalysts analyzed using UV-DRS making them active in visible region with maximum shift corresponds to a band energy difference of 2.1 eV for ZMT4S2. The sensitivity of the catalyst towards visible light was confirmed by its band gap energy measurement using UV-vis DRS. The anatase phase of all the catalysts were confirmed using Powder X-ray diffraction. The composition and wt% of dopants revealed the EDX spectra agrees well with the calculated value. The slightly shifted frequency bands (FTIR) further confirmed the doping of Zn and Mg. The characterization analysis reports further accounts for the effective degradation of AB10B dye (99%) taking place within 20 min of irradiation time at optimized reaction parameters such as best dopant concentration ZMT4, catalyst dosage (100 mgL−1), dye concentration (10 mgL−1) and solution pH 3.

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“…It is possible to exert a certain degree of control over the oxygen vacancy and the carrier concentration in order to enhance the desirable properties depending on the application field [ 8 ]. For example, doping the material with suitable metal ion dopants (Al, Nb, Sn, Ge, and Ni, among others) has proven to be an effective method for adjusting the material properties for their application into photovoltaic devices or photocatalysis and pollution sensors [ 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Sputtered Ultrathin TiO2 as Electron Transport Layer in Silicon Heterojunction Solar Cell Technology

2022

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This work presents the implementation of ultrathin TiO2 films, deposited at room temperature by radio-frequency magnetron sputtering, as electron-selective contacts in silicon heterojunction solar cells. The effect of the working pressure on the properties of the TiO2 layers and its subsequent impact on the main parameters of the device are studied. The material characterization revealed an amorphous structure regardless of the working pressure; a rougher surface; and a blue shift in bandgap in the TiO2 layer deposited at the highest-pressure value of 0.89 Pa. When incorporated as part of the passivated full-area electron contact in silicon heterojunction solar cell, the chemical passivation provided by the intrinsic a-Si:H rapidly deteriorates upon the sputtering of the ultra-thin TiO2 films, although a short anneal is shown to restore much of the passivation lost. The deposition pressure and film thicknesses proved to be critical for the efficiency of the devices. The film thicknesses below 2 nm are necessary to reach open-circuit values above 660 mV, regardless of the deposition pressure. More so, the fill-factor showed a strong dependence on deposition pressure, with the best values obtained for the highest deposition pressure, which we correlated to the porosity of the films. Overall, these results show the potential to fabricate silicon solar cells with a simple implementation of electron-selective TiO2 contact deposited by magnetron sputtering. These results show the potential to fabricate silicon solar cells with a simple implementation of electron-selective TiO2 contact.

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Synthesis and characterization of Mg doped TiO2 nanoparticles for photocatalytic applications

Cited by 13 publications

References 31 publications

Enhanced Effect of Metal Sulfide Doping (MgS-TiO2) Nanostructure Catalyst on Photocatalytic Reduction of CO2 to Methanol

Enhanced Effect of Metal Sulfide Doping (MgS-TiO2) Nanostructure Catalyst on Photocatalytic Reduction of CO2 to Methanol

Biogenic surfactant mediated facile synthesis of visible light sensitized Zn/Mg co-doped TiO2 Nanomaterials– A Green approach: Evaluation of photocatalytic activity by degradation of Amido Black 10B

Sputtered Ultrathin TiO2 as Electron Transport Layer in Silicon Heterojunction Solar Cell Technology

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