Low-Temperature Desulfurization on Iron Oxide Hydroxides: Influence of Precipitation pH on Structure and Performance

AbstractSyntheses of ferric smectites were performed at low temperature (75° C by aging coprecipitated gels of silica and Fe2+-sulphate under initially reducing then oxidizing conditions. Under strictly reducing conditions only nuclei of a trioctahedral ferrous stevensite were observed and crystal growth did not take place. When a spontaneous oxidization, in contact with air, was effected, the ferrous smectite nuclei transformed rapidly into a ferric, nontronite-like, smectite. Crystallogenesis of the ferric smectite was studied by XRD, IR, DTA, Mössbauer and EPR spectroscopies. The end-synthesis smectite contained only Fe3+ions, all located in the octahedral sheet. This clay was mixed with a cryptocrystalline iron oxide phase containing one-third of the iron atoms and undetectable by XRD.

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Low-temperature synthesis of hetero-structures of magnetically separable iron oxide@Au-rGO nanocomposite for efficient degradation of organic dye under visible light irradiation

Environmental Research ◽

10.1016/j.envres.2021.112510 ◽

2022 ◽

Vol 205 ◽

pp. 112510

Author(s):

Maryam Roostaee ◽

Iran Sheikhshoaie ◽

Hassan karimi maleh

Keyword(s):

Iron Oxide ◽

Low Temperature ◽

Visible Light ◽

Visible Light Irradiation ◽

Organic Dye ◽

Light Irradiation ◽

Low Temperature Synthesis ◽

Temperature Synthesis ◽

Magnetically Separable

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Enhancing Interconnect Reliability and Performance by Converting Tantalum to 2D Layered Tantalum Sulfide at Low Temperature

Advanced Materials ◽

10.1002/adma.201902397 ◽

2019 ◽

pp. 1902397 ◽

Cited By ~ 4

Author(s):

Chun‐Li Lo ◽

Massimo Catalano ◽

Ava Khosravi ◽

Wanying Ge ◽

Yujin Ji ◽

...

Keyword(s):

Low Temperature ◽

Tantalum Sulfide ◽

Interconnect Reliability ◽

And Performance

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Comparison of Photoelectrochemical Current in Amorphous and Crystalline Anodized TiO2 Nanotube Electrodes

International Journal of Photoenergy ◽

10.1155/2019/9848740 ◽

2019 ◽

Vol 2019 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Candy C. Mercado ◽

Michael Eric L. Lubrin ◽

Hazel Anne J. Hernandez ◽

Reynaldo A. Carubio

Keyword(s):

Low Temperature ◽

Annealing Temperature ◽

Pore Diameter ◽

Low Voltage ◽

Tube Length ◽

Photoelectrochemical Performance ◽

Amorphous Titania ◽

Photoelectrochemical Response ◽

And Performance ◽

Photocatalytic Applications

The interest in TiO2 nanotubes has resulted in a lot of studies including the effects of various parameters on the properties and performance for different applications. This study investigated the effect of anodization at a low temperature on the properties and photoelectrochemical performance. The effects of varied anodization settings on morphology, crystallinity, and PEC response were studied. Low-temperature anodization resulted in smaller pore diameter and shorter tube length. Annealing temperature affected the presence of varied phases of TiO2 such as the prominence of anatase and amounts of rutile and amorphous TiO2 at 125°C. To observe photoelectrochemical response, annealing at 450°C is necessary. However, a cathodic response was observed for TiO2 nanotubes synthesized with low voltage at low temperature. Hence, amorphous titania nanotubes annealed at 125°C with thickness achieved in the anodization can be a potential material used for photocatalytic applications due to its determined cathodic photoelectrochemical response.

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