Preparation of photoactive nitrogen-doped rutile

Dolat, D.; Moszyński, Dariusz; Guskos, N.; Ohtani, Bunsho; Morawski, Antoni W.

doi:10.1016/j.apsusc.2012.12.048

Cited by 26 publications

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“…In other words, TiN cannot be fully formed at 800 °C. Dolat et al [ 30 , 31 ] observed that the modification of TiO 2 at 800 °C in an ammonia atmosphere produces a nitrogen-doped TiO 2 –TiN composite. Therefore, TiN 800 °C is denoted as TiO 2 & TiN 800 °C in this study.…”

Section: Resultsmentioning

confidence: 99%

Study on the Performance of Nano-Titanium Nitride-Coated Stainless Steel Electrodes in Electro-Fenton Systems

Wang

Lin

2018

Nanomaterials

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The electro-Fenton (EF) process is a type of electrochemical oxidation process; ·OH radicals are generated on the cathode using electricity and decolorize dye wastewaters. Most studies on EF systems in the past have focused on the operating parameters of this process. In recent years, the influence of electrode performance on the EF process has begun to receive more attention. In this study, direct nitridation was used to prepare titanium nitride powders, which were thereafter coated on an SUS304 stainless steel substrate. The performance of this system in the treatment of rhodamine B dye wastewaters via the EF process was investigated. The experimental methods used in this work include: (1) scanning electron microscopy (SEM); (2) X-ray diffraction (XRD); (3) electrochemical Tafel curves; (4) linear sweep voltammetry (LSV); (5) and cyclic voltammetry (CV). It was shown that high-purity TiN can be formed at nitriding temperatures above 900 °C, and the strength of the (111) crystal plane increases with the increase in nitriding temperature; the TiN coating effectively activates the reactive surface of the electrode owing to its porous structure. In terms of corrosion resistance, the corrosion potential and corrosion current of the TiN 1000 °C/SUS304 electrode were 116.94 mV and 205 nA/cm2, respectively, and the coating had a coating porosity of 0.89 × 10−7. As compared with SUS304 stainless steel, the TiN 1000 °C/SUS304 composite electrode had a significantly greater degree of corrosion resistance and exhibited higher redox activity in LSV tests. This composite electrode could achieve a decolorization rate of 49.86% after 30 min, and 94.46% after 120 min. In summary, the TiN 1000 °C/SUS304 composite electrode is very stable and has excellent decolorization efficacy in the EF process. Our findings will serve as a useful reference for future studies on EF electrodes.

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Section: Resultsmentioning

confidence: 99%

Study on the Performance of Nano-Titanium Nitride-Coated Stainless Steel Electrodes in Electro-Fenton Systems

Wang

Lin

2018

Nanomaterials

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“…In recent years, many studies have focused on the improvement of the photoactivity of rutile TiO 2 under visible irradiation. Hence, in order to obtain visible-lightsensitized rutile TiO 2 , TiO 2 was modified with metals and/ or nonmetals [10,[14][15][16][17], or new synthesis methods were developed to produce particles with different structural and morphological properties [8,9,11,18]. Since the crystallite phase, shape, size, specific surface area, and optical properties highly influence its catalytic performances, it is important to synthesize a catalyst with characteristic properties that leads to high photoactivity.…”

Section: Introductionmentioning

confidence: 99%

“…Since the crystallite phase, shape, size, specific surface area, and optical properties highly influence its catalytic performances, it is important to synthesize a catalyst with characteristic properties that leads to high photoactivity. Therefore, considerable attention has been given to the synthesis and characterization of rutile TiO 2 nanoparticles for the determination of energy-efficient and environmentally friendly methods and appropriate conditions at which TiO 2 particles with controlled properties can be synthesized [9,14,[18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…There are several studies that examined the photocatalytic performance of rutile TiO 2 under visible light illumination [8,9,11,14,16]. However, to the best of our knowledge, there are no studies reported in regard to the visible light photocatalytic degradation of terephthalic acid (TPA), which is a raw material for the manufacture of polyester fibers and films and is produced in millions of tons all over the world [31].…”

Section: Introductionmentioning

confidence: 99%

“…Many synthetic methods were developed to produce rutile TiO 2 such as thermal hydrolysis, microemulsion, solgel, hydro-and solvothermal, thermal annealing, and sonochemical [3,9,14,[18][19][20][21][22][23][24][25][26][27][28][29][30]. They have different drawbacks; some of them are complex, require high energy or special equipment, cause a low yield, or need calcination at high temperature for phase transition.…”

Section: Introductionmentioning

confidence: 99%

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Visible light photocatalytic activity of rutile TiO2 fiber clusters in the degradation of terephthalic acid

Yener

Helvacı

2015

Appl. Phys. A

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Rutile TiO 2 nanoparticles, in different structural and morphological properties, were produced by the hydrolysis of titanium tetrachloride in a highly acidic reaction media at moderate temperatures without calcination. Their photocatalytic activities were investigated in the liquid-phase degradation of terephthalic acid under visible light illumination. The parameters, which are the concentration of the titanium tetrachloride solution (0.1-1 M) and reaction temperature (60-95°C), effective on the properties of the particles, and their photocatalytic performances, were investigated. The XRD patterns indicated a pure rutile crystal structure at moderate temperatures without need of calcination. The FEGSEM images showed the formation of flower-, pinecone-, and sphere-like clusters consisting of interconnected nanofibers. The N 2 adsorption-desorption isotherms pointed out the microporous structure of the clusters. Band gap energies were found to be varying between 3.02 and 3.08 eV due to the well-developed rutile crystallite structure. Systematic studies elucidated that the optimum reactant concentration and reaction temperature are 0.5 M TiCl 4 and 95°C, respectively. The rutile clusters synthesized at the optimum reaction conditions exhibited 99 % of the photocatalytic degradation of TPA under visible light illumination at shorter irradiation times compared with commercial P25 TiO 2 .

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Development of Defect‐Free Rutile‐TiO₂ by N‐Doping and its Enhanced Photocatalytic Efficiency

Padmini,

Thilakan

2024

ChemistrySelect

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Undoped and Nitrogen‐doped Rutile‐TiO2 (R‐TiO2) nano‐spindles were synthesized via sol‐gel synthesis. XPS studies revealed the combined presence of Ti4+ and Ti3+ ionic states in the undoped sample. Among them, Ti3+ was observed contributing a trap state in its Photoluminescence spectrum. Whereas, nitrogen doping was found resulting in the presence of Ti4+ state alone without Ti3+, confirmed from the XPS measurement. These corresponding trap states of Ti3+ were also found missing in the photoluminescence spectrum. XRD characterization confirmed the crystallization of rutile structure and their corresponding HR‐TEM studies showed the crystallization of nano‐spindles. Raman studies reveal a grouped red shift in the peak positions of A1g, and Eg peaks and a blue shift of second order peak (241 cm−1) position, especially in N‐doped samples. The values of Flat‐band (FB) potential derived from Electrochemical impedance (EIS) measurement found varied from −0.48 V–−0.71 V for N‐doped samples, which confirms that the energy level of N‐doped R‐TiO2 is higher than the reduction potential of “O2−” (−0.33 V). Hence, the R‐TiO2(N)/electrolyte interface seems facilitating the synergetic charge transport, which in turn exhibits an improvement in the Methylene Blue (MB) dye degradation efficiency from 63 % (undoped R‐TiO2) to 81 % (2 wt. % of N‐doping).

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Preparation of photoactive nitrogen-doped rutile

Cited by 26 publications

References 62 publications

Study on the Performance of Nano-Titanium Nitride-Coated Stainless Steel Electrodes in Electro-Fenton Systems

Study on the Performance of Nano-Titanium Nitride-Coated Stainless Steel Electrodes in Electro-Fenton Systems

Visible light photocatalytic activity of rutile TiO2 fiber clusters in the degradation of terephthalic acid

Development of Defect‐Free Rutile‐TiO₂ by N‐Doping and its Enhanced Photocatalytic Efficiency

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Preparation of photoactive nitrogen-doped rutile

Cited by 26 publications

References 62 publications

Study on the Performance of Nano-Titanium Nitride-Coated Stainless Steel Electrodes in Electro-Fenton Systems

Study on the Performance of Nano-Titanium Nitride-Coated Stainless Steel Electrodes in Electro-Fenton Systems

Visible light photocatalytic activity of rutile TiO2 fiber clusters in the degradation of terephthalic acid

Development of Defect‐Free Rutile‐TiO2 by N‐Doping and its Enhanced Photocatalytic Efficiency

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Development of Defect‐Free Rutile‐TiO₂ by N‐Doping and its Enhanced Photocatalytic Efficiency