scholarly journals Structural Characterization and Antibacterial Activity of Antibiotic Streptomycin Immobilized on Zeolite Synthesized from Natural Kaolinite

2021 ◽  
Vol 11 (5) ◽  
pp. 13573-13586
Keyword(s):  
Electron Microscopy ◽  
Antibacterial Activity ◽  
Hydrothermal Process ◽  
Antibacterial Activities ◽  
Good Prospect ◽  
X Ray ◽  
Gram Positive Bacteria ◽  
Transmission Electron ◽  
Inhibition Concentration ◽  
Diffusion Technique

This study evaluated the efficacy of antibacterial activities for a zeolite A (ZEO) sample loaded with streptomycin (STR). The ZEO was synthesized from kaolinite (KAO) via the alkaline hydrothermal process and verified with various techniques, such as X-ray Diffraction, Fourier-Transform Infrared spectroscopy, Field Emission Scanning Electron Microscopy with Energy Dispersive X-ray, Transmission Electron Microscopy, and dispersion behavior to confirm the production of ZEO with high purity and reproducibility. The cubic framework of ZEO was maintained after the immobilization of STR, indicating STR molecules' adsorption on the ZEO surface. The STR-loaded ZEO (ZS) samples were prepared in three STR concentrations (50, 100, and 200 mg/L). The samples' antibacterial activity was determined using the disc diffusion technique and minimum inhibition concentration against Gram-negative bacteria (Escherichia coli ATCC 11229) and Gram-positive bacteria (Staphylococcus aureus ATCC 6538). Both bacteria were susceptible to ZS, which showed an antibacterial effect directly proportional to the STR concentration. Thus, the synthesized ZEO synthesized from natural KAO had a good prospect as a carrier system for STR for generating a broad spectrum of antibacterial activity.

Characteristic of Al-Doped ZnO Nanorods by a Hydrothermal Process

2010 ◽  
Vol 434-435 ◽  
pp. 646-648 ◽  
Author(s):  
Jenn Kai Tsai ◽  
Ju Yu Wei ◽  
Yi Chi Chen ◽  
You Cheng Jheng ◽  
Teen Hang Meen
Keyword(s):  
Electron Microscopy ◽  
Zno Nanorods ◽  
Hydrothermal Process ◽  
Zinc Nitrate ◽  
Diffraction Field ◽  
Si Substrate ◽  
X Ray ◽  
Transmission Electron ◽  
Dilute Aqueous Solution ◽  
Doped Zno

In this study, well-aligned single-crystalline zinc oxide (ZnO) nanorods arrays were synthesized on Si substrate by simple hydrothermal process in dilute aqueous solution which consisting of zinc nitrate tetrahydrate (Zn(NO3)2•4H2O) and hexamethyltetramine (C6H12N4, HMT) at 90 °C, in the autoclave. ZnO thin film was pre-deposited on Si substrate by the sputter deposition to serve as the seed layer. Aluminum nitrite (Al(NO3)3) also has been mixed into reaction solution. Al doped ZnO nanorod arrays were fabricated successfully. ZnO nanorods were characterized by high resolution X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, energy dispersive x-ray spectroscopy, and photoluminescence measurement.

Ordered Mesoporous SBA-15 for Controlled Release of Water-Insolube Drug

2011 ◽  
Vol 236-238 ◽  
pp. 1873-1876 ◽  
Author(s):  
Jun Jie Tao ◽  
Yun Qiang Xu ◽  
Guo Wei Zhou ◽  
Cui Cui Wu ◽  
Hong Bin Song ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Controlled Release ◽  
Hydrothermal Process ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Mesoscopic Structure ◽  
Ordered Mesoporous ◽  
Adsorption Desorption ◽  
Phosphate Buffered Saline

Ordered mesoporous SBA-15 was synthesized through hydrothermal process under acidic condition. The material was characterized by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), small-angle X-ray diffraction (SAXRD), and N2 adsorption-desorption. The results indicated that SBA-15 has 2-dimensional hexagonal p6mm mesoscopic structure and well-ordered parallel mesochannel. The as-obtained mesoporous silica was used for controlled release of water-insolube drug emodin. The loading capacity could achieve 6.64 mg/g, and the release profiles that studied in phosphate buffered saline (PBS, pH = 7.4) showed that released amount of emodin was 95.8 % after 48 h.

Synthesis and Magnetic Properties of CoFe2O4 Nano-Particles

2010 ◽  
Vol 148-149 ◽  
pp. 998-1002 ◽  
Author(s):  
Xiao Yun Chen ◽  
Hua Li ◽  
Yue Zeng Su ◽  
Zi Shan Huang ◽  
He Zhou Liu
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Magnetic Properties ◽  
Hydrothermal Process ◽  
Nano Particles ◽  
Vibrating Sample Magnetometer ◽  
X Ray ◽  
Transmission Electron ◽  
Structure Morphology ◽  
Water Ratio

Spinel CoFe2O4 nano-particles were synthesized by hydrothermal traditionally and Ethylene Glycol (EG) assisted hydrothermal process originally. The effects of reaction temperatures from 140°C to 200°C, different OH- provider and EG/water ratio on the nano-particles’ structure, morphology and magnetic properties of composition were studied by X-ray diffractometer (XRD), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM). The possible mechanism for the effects on the properties was also discussed in details. The results showed that NaAC as OH- provider and higher EG/water ratio in solvent were benefit for getting smaller CoFe2O4 nano-particles. And existence of EG is also important to remove the α-Fe2O3 phase.

Synthesis of ZnO2 Nanocrystals Produced by Hydrothermal Process

2009 ◽  
Vol 1242 ◽  
Author(s):  
R. Esparza ◽  
A. Aguilar ◽  
A. Escobedo-Morales ◽  
C. Patiño-Carachure ◽  
U. Pal ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Hydrogen Peroxide ◽  
Transmission Electron Microscopy ◽  
Hydrothermal Process ◽  
High Resolution Electron Microscopy ◽  
X Ray ◽  
Transmission Electron ◽  
Resolution Electron ◽  
Zinc Peroxide ◽  
20 Nm

ABSTRACTZinc peroxide (ZnO2) nanocrystals were directly produced by hydrothermal process. The nanocrystals were synthesized using zinc acetate as precursor and hydrogen peroxide as oxidant agent. The ZnO2 powders were characterized by X-ray powder diffraction and transmission electron microscopy. The results of transmission electron microscopy indicated that the ZnO2powders consisted of nanocrystals with diameters below to 20 nm and a faceted morphology. High resolution electron microscopy observations have been used in order to the structural characterization. ZnO2 nanocrystals exhibit a well-crystallized structure.

Hydrothermal Synthesis and Electrocatalytic Property for H2O2 Reduction of Co3O4 Nanocubes

2011 ◽  
Vol 311-313 ◽  
pp. 477-480
Author(s):  
Zhi Ai Yang ◽  
Li Jin Feng ◽  
Xia Wang ◽  
Rong Ma ◽  
Jian Ping Sun ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Hydrothermal Process ◽  
Linear Sweep Voltammetry ◽  
Average Crystallite Size ◽  
X Ray Diffraction ◽  
Linear Sweep ◽  
Electrocatalytic Property ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

Subscript textThe Co3O4 nanocubes were synthesized by hydrothermal process. The products are characterized in detail by multiform techniques: scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and energy-dispersive X-ray analysis. The results show that the products are uniform nanocubes with an average crystallite size about 20-40 nm. Electrocatalytic property of the prepared Co3O4 nanocubes was characterized by linear sweep voltammetry. LSV results indicate that Co3O4 nanocubes exhibit a remarkable electrocatalytic activity for the H2O2 reduction.

Preparation of Polyaniline Supported TiO2 Photocatalyst and its Photocatalytic Property

2011 ◽  
Vol 356-360 ◽  
pp. 524-528 ◽  
Author(s):  
Chun Ling Yu ◽  
Rui Xue Wu ◽  
Ying Huan Fu ◽  
Xiao Li Dong ◽  
Hong Chao Ma
Keyword(s):  
Electron Microscopy ◽  
Hydrothermal Process ◽  
Photocatalytic Property ◽  
Visible Spectrum ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
Anthraquinone Dye ◽  
X Ray ◽  
Transmission Electron ◽  
Uv Visible

A polyaniline supported titanium dioxide photocatalyst was prepared by an impregnation-hydrothermal process and characterized by powder X-ray diffraction, transmission electron microscopy and UV-visible spectroscopy. It was found that the TiO2 nanoparticles were well dispersed on the surface of the polyaniline and the photocatalyst has a stronger absorption compared with that of pure TiO2 over the whole of the visible spectrum. The photocatalyst exhibited higher photocatalytic activity than pure TiO2 for the photodegradation of solutions of the anthraquinone dye, reactive brilliant blue KN-R, under visible light irradiation.

Hydrothermal Synthesis of Zn2(MoO4)(SeO3) and Photocatalytic Applications

2013 ◽  
Vol 385-386 ◽  
pp. 16-18
Author(s):  
Yan Zhong Zhen ◽  
Dan Jun Wang ◽  
Feng Fu ◽  
Gang Lin Xue
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Hydrothermal Synthesis ◽  
Hydrothermal Process ◽  
Experimental Result ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Photocatalytic Applications ◽  
Simple Hydrothermal Process

A novel mixed metal molybdates, Zn2(MoO4)(SeO3) 1 has been synthesized by a simple hydrothermal process. Samples obtained are characterized using powder and single crystal X-ray diffraction (XRD), transmission electron microscopy (TEM). Furthermore, the photocatalytic performances of samples obtained are investigated for degradation of RhB under visible light irradiation. photocayalysis experimental result has illustrated that the compound exhibits good photocatalysis.

Shape-Controlled Synthesis of Gadolinium Oxide Nanostructure via Facile Process

2012 ◽  
Vol 182-183 ◽  
pp. 265-269
Author(s):  
Qing Zhang ◽  
Pei Wen Hao ◽  
Xin Qu ◽  
Chun Wang ◽  
Rui Xia Li
Keyword(s):  
Electron Microscopy ◽  
Hydrothermal Process ◽  
X Ray Diffraction ◽  
Hydrothermal Temperature ◽  
X Ray ◽  
Transmission Electron ◽  
Heating Treatment ◽  
Shape Controlled ◽  
Low Dimensional ◽  
Hydrolysis Of

A facile method to selectively synthesize nano-scaled Gd2O3 with different morphology such as nanosheres and nanorods has been developed in our report. The precursors GdOHCO3 can be prepared by a two-step hydrothermal process via homogeneous generation of hydroxide ions through the hydrolysis of urea, and the formation of different morphology structures were obtained under different reaction temperatures. After further heating treatment, a transformation from GdOHCO3 to cubic Gd2O3 takes place. The morphology and size of nano Gd2O3 strongly depend on that of the precursors GdOHCO3. The X-ray diffraction, transmission electron microscopy and scanning electron microscopy were employed to characterize the as-obtained low-dimensional nanostructures. And the effects of hydrothermal temperature, solvent and urea concentration on the morphologies of the products were also studied.

Synthesis of Al Doped ZnO with a Novel Rice Microstructure by Hydrothermal Process and Analysis of their Gas Sensing Properties

2014 ◽  
Vol 809-810 ◽  
pp. 724-730
Author(s):  
Zan Li ◽  
Wei Qin ◽  
Xiao Hong Wu
Keyword(s):  
Electron Microscopy ◽  
Gas Sensing ◽  
Hydrothermal Process ◽  
Hexagonal Wurtzite Structure ◽  
X Ray ◽  
Sensing Properties ◽  
Transmission Electron ◽  
Gas Sensing Properties ◽  
Doped Zno ◽  
Hydrothermal Approach

Al-doped ZnO (AZO) powers with a novel rice-like morphology have been successfully synthesized through a simple and efficient hydrothermal approach, the products have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) with an energy-dispersive X-ray analyzer and transmission electron microscopy (TEM). It showed that all the samples presented an hexagonal wurtzite structure of high crystallinity, and the microstructure was composed of numerous dumbbells. Furthermore, the heater gas sensors were fabricated and an investigation of gas sensing properties has been conducted. The sensors showed good selectivity to ethanol comparing with NH3, SO2, CO and HCHO and possible mechanism was discussed. The Sensors based AZO powers exhibited high response values, reproducible response-recovery to ethanol 50-1800 ppm at 332°C.

Hydrothermal Synthesis and Characterisation of Mn2O3 Nanowires

2014 ◽  
Vol 1033-1034 ◽  
pp. 1040-1043 ◽  
Author(s):  
Bin Deng ◽  
Hai Ying Huang
Keyword(s):  
Electron Microscopy ◽  
Hydrothermal Treatment ◽  
Raw Materials ◽  
Hydrothermal Process ◽  
Recrystallization Process ◽  
The Novel ◽  
X Ray ◽  
Industrial Manufacturing ◽  
Transmission Electron ◽  
Novel Method

In this Letter, we reported the facile synthesis of manganese (III) oxide (Mn2O3) nanowires via the facile hydrothermal treatment in the presence of ammonia, which were prepared simply by hydrothermal treatment of commercial bulky Mn2O3crystals at 160oC for 24 h. The obtained Mn2O3products consist a large quantity of nanwires with the diameters of 30-90 nm, and lengths ranging from 1 to 10 μm. Such high quality nanowires with high aspect ratio have a variety of promising applications. The simplicity of hydrothermal process, cheapness, and availability of raw materials, without the need of catalyst or template, are advantages favoring industrial manufacturing in scaled-up process by the novel method. X-ray and transmission electron microscopy, electron diffraction, and scanning electron microscopy have been employed to characterize these materials. In addition, the possible growth mechanism of the Mn2O3nanowires was also proposed. The growth of Mn2O3nanowires occurredviaa dissolution-recrystallization process.

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