Nanosize MgO as antibacterial agent: preparation and characteristics

Tang, Zhen‐Xing; Fang, Xiu-Juan; Zhang, Zhiliang; Zhou, Ting; Zhang, Xinyi; Shi, Lu-E

doi:10.1590/s0104-66322012000400009

Cited by 47 publications

(30 citation statements)

References 28 publications

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“…Impurities or chemically absorbed water could conceal active spots of nanoparticles. 16,18 With increasing calcination time, antibacterial activity of CaO nanoparticles was also increased. When calcination time was increased to 15 and 10 h from TGA ( Figure 8, -B, and -C), CaO nanoparticles had a higher antibacterial activity compared with CaO-SA.…”

Section: Antibacterial Activity Of Cao Nanoparticlesmentioning

confidence: 99%

“…8,[15][16][17][18] Thermal gravimetric analysis (TGA) measurements were carried out using Netzsch STA 409 Apparatus. A helium flow of 40 cm 3 min −1 and a heating rate of 10 K min −1 were used; the size and particle size distribution was recorded in ethanol using submicron particle sizer (NICOMP 370, USA).…”

Section: Characteristics Analysis Of Cao Nanoparticlesmentioning

confidence: 99%

“…In fact, the sintering of CaO is a common phenomenon that occurs simultaneously with calcination. 15,16,18,20 Borgwardt (1989) studied that the sintering rate of CaO in an N 2 atmosphere at temperatures between 700 and 1100 °C and found that the surface area and porosity of the sorbent sharply decreased as calcination temperature increased. 21 In our case, when the intermediates were decomposed at high temperatures, small CaO nanoparticles formed, after which the contact nanoparticles formed necks and began to grow, thus resulting in an increase in the average size.…”

Section: Effect Of Calcination Conditions On the Size Of Cao Nanopartmentioning

confidence: 99%

“…When the heating rate of calcination is very fast, aggregation of CaO nanoparticles happens more easily, particularly at high calcination temperatures. 15,16,18 Therefore, a calcination heating rate of 3 °C/min was selected for the preparation of CaO nanoparticles.…”

Section: Effect Of Calcination Conditions On the Size Of Cao Nanopartmentioning

confidence: 99%

“…As per the abovementioned observations, the increase in antibacterial activity was assumed to be caused by the increase in O 2 − generated from the surface of CaO on reducing the sintering of the powder samples. 2,16,18 …”

Section: Antibacterial Activity Of Cao Nanoparticlesmentioning

confidence: 99%

See 4 more Smart Citations

Sonication-assisted preparation of CaO nanoparticles for antibacterial agents

Tang¹,

Yu²,

Zhang³

et al. 2013

Quím. Nova

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Recebido em 8/7/12; aceito em 17/2/13; publicado na web em 24/5/13The effect of calcination conditions on the size and killing activity of CaO nanoparticles towards L. plantarum was studied in this paper. The results showed that CaO nanoparticles with a diameter of 20 nm could be obtained under the investigated conditions. The lethal effect of CaO nanoparticles after incubation of 6 or 24 h increased with increasing calcination time. Using CaO-SA, CaO-SB, and CaO-SC after a 24-h exposure, 2.25, 3.37, and 5.97 log L. plantarum were killed, respectively, at a concentration of 100 ppm. The current results show that the use of CaO nanoparticles as antibacterial agents has significant potential in food-relevant industries.

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Section: Antibacterial Activity Of Cao Nanoparticlesmentioning

confidence: 99%

Section: Characteristics Analysis Of Cao Nanoparticlesmentioning

confidence: 99%

Section: Effect Of Calcination Conditions On the Size Of Cao Nanopartmentioning

confidence: 99%

Section: Effect Of Calcination Conditions On the Size Of Cao Nanopartmentioning

confidence: 99%

Section: Antibacterial Activity Of Cao Nanoparticlesmentioning

confidence: 99%

See 3 more Smart Citations

Sonication-assisted preparation of CaO nanoparticles for antibacterial agents

Tang¹,

Yu²,

Zhang³

et al. 2013

Quím. Nova

Self Cite

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Sodium alginate/magnesium oxide nanocomposite scaffolds for bone tissue engineering

Nasri‐Nasrabadi

Kaynak

Heidarian

et al. 2018

Polymers for Advanced Techs

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A simple 2‐step method, consisting of film casting and polyvinyl alcohol leaching, is proposed to prepare magnesium oxide (MO) nanoparticle‐reinforced sodium alginate scaffolds with right properties for bone tissue engineering. The cytocompatibility of the as‐prepared scaffolds was also evaluated using the 3‐(4,5‐dimethylthiazol‐2‐yl)‐2,5‐diphenyltetrazolium‐bromide yellow tetrazole assay test, wherein chondrocyte cells had been considered as target cells. According to the results, the ensuing sodium alginate nanocomposites, containing 4‐wt% MO nanoparticles, demonstrated the highest physical and mechanical properties after leaching step. The Young modulus of sodium alginate/4‐wt% MO was improved about 44%, in comparison with that of the pure alginate sample. Furthermore, incorporating MO nanoparticles up to 4 wt% controlled the liquid uptake capacity of scaffolds vis‐à‐vis the resultant pure sodium alginate sample. Moreover, with increasing the nanoparticle content, the antibacterial properties of scaffolds enhanced, but their degradation rates under in vitro conditions tapered off. With the introduction of 3‐ and 4‐wt% MO, the average diameter of the bacterial zone of the scaffold samples reduced to less than 10 mm2, suggesting an insensitive antimicrobial performance, compared with the pure sodium alginate and the samples with 1‐ and 2‐wt% MO content, which exhibit antimicrobial sensitivity. 3‐(4,5‐Dimethylthiazol‐2‐yl)‐2,5‐diphenyltetrazolium‐bromide assay test also revealed the cultivated chondrocyte cells on the 4‐wt% MO nanoparticle‐reinforced scaffold possessed better interaction as well as appropriate cell attachment and proliferation than the pristine sodium alginate sample.

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Calcination‐Dependent Morphology Transformation of Sol‐Gel‐ Synthesized MgO Nanoparticles

2017

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Sol‐gel synthesis is a widely accepted method of producing nanoparticles with high surface area‐to‐volume ratio and purity at relatively low temperatures. For metal oxide nanoparticle synthesis, sol‐gel maintains a good metal oxide composition with controlled chemical structure and the ability to fine‐tune morphology and size. Magnesium oxide (MgO) nanoparticles possess unique physicochemical characteristics that have enabled a wide range of applications from catalysis to disease treatment. The potential features of MgO nanoparticles are significantly affected by their shape and size. However, research investigating the thermo‐molecular mechanisms governing the size and shape formation of MgO nanoparticles during sol‐gel synthesis is limited. This study investigates the effect of sol‐gel synthesis conditions on the shape and size as well as other functional features of MgO nanoparticles. The results demonstrated that the size and shape alterations of MgO nanoparticles were dependent on changes in calcination temperature and also the presence of periclase phase along with their crystallinity and functional groups. TEM analysis showed the morphological evolution during the synthesis process from spherical to hexagonal and from hexagonal to rod shape. By varying the calcination temperature and gelling agent composition in sol‐gel synthesis, MgO nanoparticles with different size distributions and morphologies can be generated for various applications. The current study reveals that the gelling agent is responsible for sol‐gel phase formation which eventually affects the calcination temperature for the formation of morphologically different MgO nanoparticles.

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Nanosize MgO as antibacterial agent: preparation and characteristics

Cited by 47 publications

References 28 publications

Sonication-assisted preparation of CaO nanoparticles for antibacterial agents

Sonication-assisted preparation of CaO nanoparticles for antibacterial agents

Sodium alginate/magnesium oxide nanocomposite scaffolds for bone tissue engineering

Calcination‐Dependent Morphology Transformation of Sol‐Gel‐ Synthesized MgO Nanoparticles

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