Preparation and characterization of TiO2 nanoparticles by two different precipitation methods

Wang, Zhinuo; Liu, Shimin; Cao, Xin; Wu, Sumei; Liu, Chaoqian; Li, Gang; Jiang, Weiwei; Wang, Hualin; Wang, Nan; Ding, Wanyu

doi:10.1016/j.ceramint.2020.03.075

Cited by 34 publications

(17 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Various attempts have been reported for the enhancement of characteristics such as crystal phase, particle size, morphology and crystallinity of TiO 2 in order to ensure its remarkable activity [8] , [11] . For the synthesis of TiO 2 catalyst, different method such as sol gel [12] , hydrothermal [13] , precipitation [14] , solvothermal [5] and direct synthesis [15] has been employed. Among these methods, sol gel is widely studied synthesis method because of its mild experimental conditions and simple preparation approach.…”

Section: Introductionmentioning

confidence: 99%

Improved direct synthesis of TiO2 catalyst using sonication and its application for the desulfurization of thiophene

Tiple

Sinhmar

Gogate

2021

Ultrasonics Sonochemistry

View full text Add to dashboard Cite

Highlights Development of best synthesis process for TiO 2 catalyst using ultrasound. Lower particle size and uniform morphology can be obtained using ultrasound. Performance of catalytic activity evaluated for the desulfurization of thiophene. UV and US in combination with oxidant/catalyst gives best treatment approach. Role of solvent in affecting desulfurization of thiophene demonstrated.

show abstract

Section: Introductionmentioning

confidence: 99%

Improved direct synthesis of TiO2 catalyst using sonication and its application for the desulfurization of thiophene

Tiple

Sinhmar

Gogate

2021

Ultrasonics Sonochemistry

View full text Add to dashboard Cite

show abstract

“…To extract Ti, various leaching treatments have been suggested, such as using the mixture of hydrogen peroxide and sulfuric acid with a suppression of Si dissolution [71], as well as using alkaline solutions [72], phosphoric acid [47], etc. However, the most promising way for Ti extraction from the residue is the leaching by concentrated hydrochloric acid with its dissolution and subsequent precipitation of TiO 2 [73]. The obtained amorphous SiO 2 can be used for the production of white carbon black [74].…”

Section: Discussionmentioning

confidence: 99%

Research on High-Pressure Hydrochloric Acid Leaching of Scandium, Aluminum and Other Valuable Components from the Non-Magnetic Tailings Obtained from Red Mud after Iron Removal

Zinoveev

Grudinsky

Zhiltsova

et al. 2021

Metals

View full text Add to dashboard Cite

Red mud is a hazardous waste of the alumina industry that contains high amounts of iron, aluminum, titanium and rare-earth elements (REEs). One of the promising methods for the extraction of iron from red mud is carbothermic reduction with the addition of sodium salts. This research focuses on the process of hydrochloric high-pressure acid leaching using 10 to 20% HCl of two samples of non-magnetic tailings obtained by 60 min carbothermic roasting of red mud at 1300 °C and the mixture of 84.6 wt.% of red mud and 15.4 wt.% Na2SO4 at 1150 °C, respectively, with subsequent magnetic separation of metallic iron. The influence of temperature, leaching duration, solid-to-liquid-ratio and acid concentration on the dissolution behavior of Al, Ti, Mg, Ca, Si, Fe, Na, La, Ce, Pr, Nd, Sc, Zr was studied. Based on the investigation of the obtained residues, a mechanism for passing valuable elements into the solution was proposed. It has shown that 90% Al, 91% Sc and above 80% of other REEs can be dissolved under optimal conditions; Ti can be extracted into the solution or the residue depending on the leaching temperature and acid concentration. Based on the research results, novel flowsheets for red mud treatment were developed.

show abstract

“…To extract Ti, various leaching treatment was suggested using the mixture of hydrogen peroxide and sulfuric acid with suppression of Si dissolution [65], as well as using alkaline solutions [66], phosphoric acid [45], etc. However, the most promising way for Ti extraction from the residue is the leaching by concentrated hydrochloric acid with its dissolution and subsequent precipitation of TiO2 [67]. The obtained amorphous SiO2 can be used for production of white carbon black [68].…”

Section: Discussionmentioning

confidence: 99%

Research on High-Pressure Hydrochloric Acid Leaching of Scandium, Aluminium and Other Valuable Components from the Non-Magnetic Residues Obtained from Red Mud after Iron Removal

Zinoveev¹,

Grudinsky²,

Zhiltsova³

et al. 2021

Preprint

View full text Add to dashboard Cite

Red mud is a hazardous waste of alumina industry that contains high amounts of iron, aluminum, titanium and REEs. One of the promising methods for the extraction of iron from red mud is car-bothermic reduction with the addition of sodium salts. This research focuses on the process of hy-drochloric high-pressure acid leaching using 10–20% HCl of two samples of non-magnetic tailings obtained by 60-minute carbothermic roasting of red mud at 1300 °C and the mixture of 84.6 wt. % of red mud and 15.4 wt. % Na2SO4 at 1150 °C, respectively, with subsequent magnetic separation of metallic iron. An influence of temperature, leaching duration, solid-to-liquid-ratio and acid con-centration on dissolution behavior of Al, Ti, Mg, Ca, Si, Fe, Na, La, Ce, Pr, Nd, Sc, Zr were studied. Based on the investigation of the obtained residues, mechanism of passing of valuable elements into the solution was proposed. It has shown that 90% Al, 91% Sc and above 80% of other REEs can be dissolved under optimal conditions; Ti can be extracted into the solution or the residue depending on the leaching temperature and acid concentration. Based on the research results, novel flowsheets for red mud treatment were developed.

show abstract

Preparation and characterization of TiO2 nanoparticles by two different precipitation methods

Cited by 34 publications

References 54 publications

Improved direct synthesis of TiO2 catalyst using sonication and its application for the desulfurization of thiophene

Improved direct synthesis of TiO2 catalyst using sonication and its application for the desulfurization of thiophene

Research on High-Pressure Hydrochloric Acid Leaching of Scandium, Aluminum and Other Valuable Components from the Non-Magnetic Tailings Obtained from Red Mud after Iron Removal

Research on High-Pressure Hydrochloric Acid Leaching of Scandium, Aluminium and Other Valuable Components from the Non-Magnetic Residues Obtained from Red Mud after Iron Removal

Contact Info

Product

Resources

About