titanium suboxide
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Author(s):  
Yaye Wang ◽  
Randall “David” Pierce ◽  
Huanhuan Shi ◽  
Chenguang Li ◽  
Qingguo Huang

Correction for ‘Electrochemical degradation of perfluoroalkyl acids by titanium suboxide anodes’ by Yaye Wang et al., Environ. Sci.: Water Res. Technol., 2020, 6, 144–152, DOI: 10.1039/C9EW00759H.


Author(s):  
Pengchao Si ◽  
Mengqi Li ◽  
Xiang Wang ◽  
Feifei Sun ◽  
Jingjing Liu ◽  
...  

2021 ◽  
Vol 1 ◽  
Author(s):  
Sara El Hakim ◽  
Tony Chave ◽  
Amr A. Nada ◽  
Stéphanie Roualdes ◽  
Sergey I. Nikitenko

In this work, we provide new insights into the design of Ti@TiO2 photocatalyst with enhanced photothermal activity in the process of glycerol reforming. Ti@TiO2 nanoparticles have been obtained by sonohydrothermal treatment of titanium metal nanoparticles in pure water. Variation of sonohydrothermal temperature allows controlling nanocrystalline TiO2 shell on Ti0 surface. At 100 < T < 150°C formation of TiO2 NPs occurs mostly by crystallization of Ti(IV) amorphous species and oxidation of titanium suboxide Ti3O presented at the surface of Ti0 nanoparticles. At T > 150°C, TiO2 is also formed by oxidation of Ti0 with overheated water. Kinetic study highlights the importance of TiO2 nanocrystalline shell for H2 generation. Electrochemical impedance spectroscopy points out more efficient electron transfer for Ti@TiO2 nanoparticles in correlation with photocatalytic data. The apparent activation energy, Ea = (25–31) ± 5 kJ·mol−1, assumes that photothermal effect arises from diffusion of glycerol oxidation intermediates or from water dynamics at the surface of catalyst. Under the heating, photocatalytic H2 emission is observed even in pure water.


Author(s):  
Fabiana D’Isanto ◽  
Federico Smeacetto ◽  
Hans-Peter Martin ◽  
Richard Sedlák ◽  
Maksym Lisnichuk ◽  
...  

RSC Advances ◽  
2021 ◽  
Vol 11 (40) ◽  
pp. 24976-24984
Author(s):  
Jiabin Liang ◽  
Shijie You ◽  
Yixing Yuan ◽  
Yuan Yuan

A stainless steel pipe (SSP) was used as a cathode. A tubular Magnéli-phase titanium suboxide (M-TiSO) anode was posited in the center. A spiral static mixer was used to process intensification.


2020 ◽  
Vol 1 (4) ◽  
Author(s):  
Peizeng Yang ◽  
Yaye Wang ◽  
Junhe Lu ◽  
Viktor Tishchenko ◽  
Qingguo Huang ◽  
...  

This study examined the degradation of perfluorooctanesulfonate (PFOS) in electrochemical oxidation (EO) processes in the presence of trichloroethylene (TCE). The EO experiment was performed in a gas-tight reactor using Magnéli phase titanium suboxide (Ti4O7) as the anode. The experimental data demonstrated that 75% of PFOS (2 μM) was degraded at 10 mA/cm2 current density in 30 min without TCE present in the solution, while the presence of 76 μM TCE apparently inhibited the degradation of PFOS, reducing its removal down to 53%. Defluorination ratio suggested that PFOS was significantly mineralized upon EO treatment, and it appeared to be not influenced by the presence of TCE. The respective pseudo-first order rate constants (kobs) of PFOS removal were 0.0471 and 0.0254 min-1 in the absence and presence of TCE. The degradation rates of both PFOS and TCE increased with current density rising from 2.5 to 20 mA/cm2. In the presence of TCE, chloride, chlorate, and perchlorate were formed that accounted for 79.7 %, 5.53%, and 1.51% of the total chlorine at 60 min. This work illustrates the promise of the Magnéli phase Ti4O7 electrode based electrochemical oxidation technology for degrading per- and polyfluoroalkyl substances (PFASs) and co-contaminants in groundwaters.


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