Ultrasound with low intensity assisted the synthesis of nanocrystalline TiO2 without calcination

Ghows, Narjes; Entezari, Mohammad Hassan

doi:10.1016/j.ultsonch.2010.03.010

Cited by 76 publications

(35 citation statements)

References 53 publications

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“…Ghows et al . synthesized nano‐sized TiO 2 particles through the ultrasonic waves at relatively low temperature with titanium isopropoxide in acidic media. They found that the crystalline phases of TiO 2 in the resulting particles were anatase.…”

Section: Introductionmentioning

confidence: 99%

“…Alammar et al (13) synthesized spherical-shaped anatase nanoparticles in the ionic liquid from titanium isopropoxide by ultrasound-assisted synthesis under ambient conditions. Ghows et al (10) synthesized nano-sized TiO 2 particles through the ultrasonic waves at relatively low temperature with titanium isopropoxide in acidic media. They found that the crystalline phases of TiO 2 in the resulting particles were anatase.…”

Section: Introductionmentioning

confidence: 99%

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Rapid Sonosynthesis of N‐Doped Nano TiO₂ on Wool Fabric at Low Temperature: Introducing Self‐cleaning, Hydrophilicity, Antibacterial/Antifungal Properties with low Alkali Solubility, Yellowness and Cytotoxicity

Behzadnia

Montazer

Rashidi

et al. 2014

Photochem & Photobiology

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Nano nitrogen-doped titanium dioxide was rapidly prepared by hydrolysis of titanium isopropoxide at 75-80°C using in situ sonochemical synthesis by introducing ammonia. Various concentrations of titanium isopropoxide were examined to deposit nano nitrogen-doped titanium dioxide through impregnation of the wool fabric in ultrasound bath followed by curing. The antibacterial/antifungal activities of wool samples were assessed against two common pathogenic bacteria including Escherichia coli and Staphylococcus aureus and the diploid fungus Candida albicans. The sonotreated wool fabrics indicated no adverse effects on human dermal fibroblasts. The presence of nanoparticles on the sonotreated wool fabrics were confirmed by FE-SEM images and EDS patterns and X-ray mapping and the crystalline size of nanoparticles were estimated through XRD results. The role of both pH and precursor concentration on the various properties of the fabric was investigated and the optimized conditions introduced using response surface methodology.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rapid Sonosynthesis of N‐Doped Nano TiO₂ on Wool Fabric at Low Temperature: Introducing Self‐cleaning, Hydrophilicity, Antibacterial/Antifungal Properties with low Alkali Solubility, Yellowness and Cytotoxicity

Behzadnia

Montazer

Rashidi

et al. 2014

Photochem & Photobiology

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“…The degree of anatase crystallinity of Samples 1–3 calculated by analysis software (Mdi jade 5.0) were 98.1%, 93.7% and >99.9%, respectively. And the average grain sizes calculated by Scherrer formula were 9.9, 7.0 and 15.1 nm, respectively . The difference of crystallisation properties between Samples 1 and 2 was caused by the variation of impurities after modification.…”

Section: Results and Analysismentioning

confidence: 91%

“…And the average grain sizes calculated by Scherrer formula were 9.9, 7.0 and 15.1 nm, respectively. [14] The difference of crystallisation properties between Samples 1 and 2 was caused by the variation of impurities after modification. As is reported, impurities like PO 4 3À , SO 4 2À , Al 3þ will hinder the growth of TiO 2 grains to some extent during the calcination process.…”

Section: Xrdmentioning

confidence: 99%

The modification of industrial grade metatitanic and application in SCR DeNO_X catalyst preparation

2013

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In this paper, industrial grade metatitanic (H2TiO3) from sulphate process was used as the raw material to prepare TiO2 through a series of modification. Granular and honeycomb SCR DeNOX catalysts were made by granulation and molding processes respectively with those TiO2 as the carrier material. The characterisation, mechanical strength and denitration performance of the carrier/catalyst samples were tested and compared with those of commercial anatase nano‐TiO2 products. The results showed that the TiO2 sample after the modified operation was remarkably improved in particle diameter, dispersion characteristic (average particle size from 15.79 to 1.746 µm) and the degree of crystallinity (from 93.7% to 98.1%), also the impurity content of K, Na, Ca, Mg, Al, S, etc. was significantly reduced; however, the grain size was increased (from 7.0 to 9.9 nm), and the specific surface area was decreased slightly (from 148.1 to 112.6 m2/g). As a whole, the characterisation was extremely close to commercial anatase nano‐TiO2. Catalyst samples prepared with TiO2 after the modified operation had an upgrade on catalytic activity (the maximum denitration rate of granular catalyst from 95.0% to 97.1%; honeycomb catalyst from 92.2% to 93.3%), and the mechanical properties of honeycomb catalysts have been enhanced significantly (compressive strength of axial direction changed from 0.1063 to 0.5965 Mpa). The work indicated that TiO2 prepared with the industrial grade metatitanic from sulphate process was suitable as a carrier material for SCR DeNOX catalyst production. Also the modification was necessary.

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“…In comparison to other phases, using anatase phase of TiO 2 nanoparticles with controlled diameters, the high homogeneity, good morphology, high surface area and porosity is very suitable to photocatalystic applications because of higher electron mobility, lower fixed dielectric and density [50][51][52] . However, thermodynamic stability is particle-size dependent and at particle diameters below 15 nm, anatase is more stable than rutile [53] .…”

Section: Equation Reactionmentioning

confidence: 99%

Advances in Photo-catalytic Materials for Environmental Applications

Ra¹

2016

Res. Rev. J Mat. Sci

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INTRODUCTIONOver two thirds of Earth's surface is covered by water; less than a third is taken up by land. As Earth's population continues to grow, people are putting ever-increasing pressure on the planet's water resources. In a sense, our oceans, rivers, and other inland waters are being "squeezed" by human activities-not so they take up less room, but so their quality is reduced. Poorer water quality means water pollution. We know that pollution is a human problem because it is a relatively recent development in the planet's history: before the 19 th century Industrial Revolution, people lived more in harmony with their immediate environment. As industrialization has spread around the globe, so the problem of pollution has spread with it. When Earth's population was much smaller, no one believed pollution would ever present a serious problem. It was once popularly believed that the oceans were far too big to pollute. Today, with around 7 billion people on the planet, it has become apparent that there are limits. Pollution is one of the signs that humans have exceeded those limits.Water pollution can be defined in many ways. Usually, it means one or more substances have built up in water to such an extent that they cause problems for animals or people. Water pollution almost always means that some damage has been done to an ocean, river, lake, or other water source. A 1969 United Nations report defined ocean pollution as: "The introduction by man, directly or indirectly, of substances or energy into the marine environment (including estuaries) resulting in such deleterious effects as harm to living resources, hazards to human health, hindrance to marine activities, including fishing, impairment of quality for use of sea water and reduction of amenities."Most water pollution doesn't begin in the water itself. Take the oceans: around 80 percent of ocean pollution enters our seas from the land. Virtually any human activity can have an effect on the quality of our water environment. When farmers fertilize the fields, the chemicals they use are gradually washed by rain into the groundwater or surface waters nearby. Sometimes the causes of water pollution are quite surprising. Chemicals released by smokestacks (chimneys) can enter the atmosphere and then fall back to earth as rain, entering seas, rivers, and lakes and causing water pollution. That's called atmospheric deposition. Water pollution has many different causes like: Sewage, Nutrients, Chemical waste, radioactive waste, Oil pollution, Plastics and Alien species. The common pollutants include toxic organic compounds like chlorinated and non-chlorinated aliphatic and aromatic compounds, dyes, inorganic compounds like heavy metals, noxious gases like NO x , SO x , CO and NH 3 , and pathogens like bacteria, fungi and viruses. ABSTRACTThe growth of industry worldwide has extremely increased the generation and accumulation of waste by products. This has caused severe environmental problems that have become a major concern. Because of this, photo-catalytic polluta...

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Ultrasound with low intensity assisted the synthesis of nanocrystalline TiO2 without calcination

Cited by 76 publications

References 53 publications

Rapid Sonosynthesis of N‐Doped Nano TiO₂ on Wool Fabric at Low Temperature: Introducing Self‐cleaning, Hydrophilicity, Antibacterial/Antifungal Properties with low Alkali Solubility, Yellowness and Cytotoxicity

Rapid Sonosynthesis of N‐Doped Nano TiO₂ on Wool Fabric at Low Temperature: Introducing Self‐cleaning, Hydrophilicity, Antibacterial/Antifungal Properties with low Alkali Solubility, Yellowness and Cytotoxicity

The modification of industrial grade metatitanic and application in SCR DeNO_X catalyst preparation

Advances in Photo-catalytic Materials for Environmental Applications

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Ultrasound with low intensity assisted the synthesis of nanocrystalline TiO2 without calcination

Cited by 76 publications

References 53 publications

Rapid Sonosynthesis of N‐Doped Nano TiO2 on Wool Fabric at Low Temperature: Introducing Self‐cleaning, Hydrophilicity, Antibacterial/Antifungal Properties with low Alkali Solubility, Yellowness and Cytotoxicity

Rapid Sonosynthesis of N‐Doped Nano TiO2 on Wool Fabric at Low Temperature: Introducing Self‐cleaning, Hydrophilicity, Antibacterial/Antifungal Properties with low Alkali Solubility, Yellowness and Cytotoxicity

The modification of industrial grade metatitanic and application in SCR DeNOX catalyst preparation

Advances in Photo-catalytic Materials for Environmental Applications

Contact Info

Product

Resources

About

Rapid Sonosynthesis of N‐Doped Nano TiO₂ on Wool Fabric at Low Temperature: Introducing Self‐cleaning, Hydrophilicity, Antibacterial/Antifungal Properties with low Alkali Solubility, Yellowness and Cytotoxicity

Rapid Sonosynthesis of N‐Doped Nano TiO₂ on Wool Fabric at Low Temperature: Introducing Self‐cleaning, Hydrophilicity, Antibacterial/Antifungal Properties with low Alkali Solubility, Yellowness and Cytotoxicity

The modification of industrial grade metatitanic and application in SCR DeNO_X catalyst preparation