A Novel Synthetic Method for N Doped TiO2 Nanoparticles Through Plasma-Assisted Electrolysis and Photocatalytic Activity in the Visible Region

Abstract

Nitrogen doped TiO2 (N-TiO2) nanoparticles were synthesized via a novel plasma enhanced electrolysis method using bulk titanium (Ti) as a source material and nitric acid as the nitrogen dopant. This method possesses remarkable merits with regard to the direct-metal synthesis of nanoparticles with its one-step process, eco-friendliness, and its ability to be mass produced. The nanoparticles were synthesized from bulk Ti metal and dipped in 5–15 mmol of a nitric acid electrolyte under the application of AC 500 V, the minimum range of voltage to generate plasma. By controlling the electrolyte concentration, the nanoparticle size distribution could be tuned between 12.1 and 24.7 nm using repulsion forces via variations in pH. The prepared N-TiO2 nanoparticles were calcined at between 100 and 300°C to determine their photocatalytic efficiency within the visible-light region, which depended on their crystal structure and N doping content. Analysis showed that the temperature treatment yielded an anatase TiO2 crystalline structure when the N doping content was varied from 0.4 to 0.54 at.%. In particular, the 0.4 at.% N doped TiO2 catalyst exhibited the highest catalytic performance with quadruple efficiency compared to the P-25 standard TiO2 nanoparticles, which featured a 91% degradation of methyl orange organic dye within 300 min. This solid-liquid reaction based on plasma enhanced electrolysis could open new pathways with regard to high purity mass producible ceramic nanoparticles with advanced properties.

Appraisal of Comparative Therapeutic Potential of Undoped and Nitrogen-Doped Titanium Dioxide Nanoparticles

“…Regarding bioremediation studies, the photocatalytic property of N-doped TiO 2 nanoparticles for air and water purification was exclusively described [19,20,21]. Talking about biomedical properties, Zane et al [22] reported the biocompatibility and antibacterial activity of N-doped TiO 2 nanoparticles and its applications in dental resin formulations.…”

Influence of Solvents' Polarity on the Physicochemical Properties and Photocatalytic Activity of Titania Synthesized Using Deinbollia pinnata Leaves

“…molecular weight metabolites, such as long chain fatty acids, galloyl ester or long chain esters. The last weight loss at 503 • C marked the decomposition of all organic compounds (Kim et al, 2018). The irregular band line shown in the spectrum may be attributed to the nature of the products formed.…”

“…The 3Dtetragonal crystal structure showed a supportive lattice parameter at a = 3.7963Å and c = 9.52847Å with angle of 90 • .The quantitative analysis showed a figure of merit at 0.149 with a space group at 141: 141/amd:1. Such crystallinity, crystal phase, and peak sharpness of green TiO 2 NP S anatase were reported to influence their application as catalyst (Kim et al, 2018) or as support (Bagheri et al, 2014), acting as gas sensor (Zakrzewska and Radecka, 2017), degradation of pollutants (Phuinthiang and Kajitvichyanukul, 2019) and in solar cell (Kang et al, 2019).…”

“…The naturally occurring oxide of titanium (IV) oxide or titania (TiO 2 ) possesses unique optical and electronic properties (Ahmad et al, 2019). The surface chemistry of nanostructures in terms of smaller size and uniqueness have already been utilized in medicine, nutrition, energy (Venugopal et al, 2017;Agarwal et al, 2018;Kim et al, 2018) and in the biosynthesis of TiO 2 NPs with metabolites present in plants extract to reduce and stabilize bulk metal into elemental forms (Mohamad et al, 2014). Plants are a major segment of biodiversity affected by many living and non-living components with their medicinal values.…”

Mo‐doped TiO2 using plasma in contact with liquids: advantages and limitations

“…[12][13][14][15][16] It can lead to the formation of amorphous products. 15 In our previous work, we successfully doped TiO 2 with various metals under underwater plasma conditions. 17 Metal electrodes were used as precursors of doping metals.…”