Self-modification of titanium dioxide materials by Ti3+ and/or oxygen vacancies: new insights into defect chemistry of metal oxides

RSC Advances ◽  
2014 ◽  
Vol 4 (27) ◽  
pp. 13979-13988 ◽  
Author(s):  
Juan Su ◽  
Xiaoxin Zou ◽  
Jie-Sheng Chen
Keyword(s):  
Titanium Dioxide ◽  
Metal Oxides ◽  
Oxygen Vacancies ◽  
Defect Chemistry ◽  
Modification Of Titanium

In this review, we highlight the recent research efforts towards understanding the defect chemistry of titanium dioxide. Particular attention is paid to the synthesis of self-modified TiO2 materials with Ti3+/oxygen vacancies and the favorable effects of these defects on the properties and applications of the obtained materials.

Room temperature Mg reduction of TiO2: formation mechanism and application in photocatalysis

2019 ◽  
Vol 55 (53) ◽  
pp. 7675-7678 ◽  
Author(s):  
Di Zu ◽  
Zhongfei Xu ◽  
Ao Zhang ◽  
Haiyang Wang ◽  
Hehe Wei ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Metal Oxides ◽  
Formation Mechanism ◽  
Room Temperature ◽  
Oxygen Vacancies ◽  
Oxide Structure

A Mg/HCl infiltrated metal oxide structure was designed as a facile approach for implanting oxygen vacancies and H atoms into metal oxides.

C-axis preferentially oriented and fully activated TiO2 nanotube arrays for lithium ion batteries and supercapacitors

2014 ◽  
Vol 2 (29) ◽  
pp. 11454-11464 ◽  
Author(s):  
Dengyu Pan ◽  
He Huang ◽  
Xueyuan Wang ◽  
Liang Wang ◽  
Haobo Liao ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Ethylene Glycol ◽  
Lithium Ion Batteries ◽  
Oxygen Vacancies ◽  
Lithium Ion ◽  
Tio2 Nanotube Arrays ◽  
Nanotube Arrays ◽  
High Concentration ◽  
Oxygen Conditions ◽  
Titanium Dioxide Nanotube Arrays

We report the fabrication of long titanium dioxide nanotube arrays with highly c-axis preferentially oriented crystallization and a high concentration of oxygen vacancies by second anodization in ethylene glycol and annealing under poor-oxygen conditions.

scholarly journals SURFACE MODIFICATION OF TITANIUM DIOXIDE NANOPARTICLES WITH ACRYLIC ACID/ISOBUTYLENE COPOLYMER UNDER ULTRASONIC TREATMENT

2019 ◽  
Vol 16 (32) ◽  
pp. 338-344
Author(s):  
Nikolay A. BULYCHEV ◽  
Lev N. RABINSKIY
Keyword(s):  
Titanium Dioxide ◽  
Surface Modification ◽  
Composite Materials ◽  
Acrylic Acid ◽  
Ultrasonic Treatment ◽  
Titanium Dioxide Nanoparticles ◽  
Polymer Coatings ◽  
Pigment Surface ◽  
Electrokinetic Sonic Amplitude ◽  
Modification Of Titanium

The influence of the ultrasonic treatment of block copolymer solution on its solid-liquid interface behavior was investigated in detail. The surface modification of titanium dioxide nanoparticles in aqueous dispersions of specially tailor-made periodic acrylic acid/isobutylene copolymer by ultrasonic treatment was studied in order to get new approaches for the creation of hybrid composite materials or polymer coatings. The pigment surface modification by the above copolymer was comparatively investigated regarding conventional adsorption as contrasted to an ultrasonic treatment assisted procedure. The course and efficiency of the polymer adsorption onto the pigment surface were quantified by electrokinetic sonic amplitude measurements. The higher efficiency of the pigment surface coating by the copolymer as achieved by ultrasonic treatment in comparison to conventional adsorption is a consequence of ultrasonically induced pigment surface activation. Two perspective avenues of the utilization of the discovered effects for creation of organic-inorganic composite materials are anticipated: the nanoparticles could first be treated by ultrasound in the presence of polymers and so create a surface modifying coating and the second option is an entrainment of the nanoparticles into the monomer matrix which can be polymerized afterward yielding a polymer with immobilized nanoparticles.

Controlled oxygen vacancy engineering on In2O3−x/CeO2−y nanotubes for highly selective and efficient electrocatalytic nitrogen reduction

2020 ◽  
Vol 7 (19) ◽  
pp. 3609-3619
Author(s):  
Zengyao Wang ◽  
Jianfeng Shen ◽  
Wenzhi Fu ◽  
Jiangwen Liao ◽  
Juncai Dong ◽  
...  
Keyword(s):  
Transition Metal ◽  
Oxygen Vacancy ◽  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Oxygen Vacancies ◽  
Reduction Reaction ◽  
Nitrogen Reduction

Introducing and adjusting the oxygen vacancies (VO) of transition metal oxides has been proposed as a significant and effective way to tackle the sluggish nitrogen reduction reaction (NRR) in the electrocatalysis process.

Tuning metal oxide defect chemistry by thermochemical quenching

2020 ◽  
Vol 22 (11) ◽  
pp. 6308-6317
Author(s):  
Shehab Shousha ◽  
Sarah Khalil ◽  
Mostafa Youssef
Keyword(s):  
Low Temperature ◽  
Metal Oxide ◽  
Metal Oxides ◽  
First Principles ◽  
Growth Conditions ◽  
Defect Chemistry ◽  
First Principles Calculations

Based on first-principles calculations, we show how to tune the low temperature defect chemistry of metal oxides by varying growth conditions.

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