Investigation of novel titanate nanotubes modified with Ce, Fe, Zn and Zr for efficient dye degradation performance, inhibition of bacterial and fungal growth and anticorrosion activity in acid medium

The effect of ultrasound on the degradation of the dye Acid Brown 83 by seven different degradation methods (blank test using only ultrasound, hydrogen peroxide in a neutral medium, hydrogen peroxide in a sulfuric acid medium and hydrogen peroxide in a sulfuric acid medium in the presence of Fe(II), both without and with ultrasonic irradiation) is studied in this paper. The effectiveness of these methods is compared by analyzing the degradation percentages of the dye and its initial degradation rate. The application of ultrasound leads to a significant increase in the efficiency of any of the degradation method studied. Kinetic study of Acid Brown 83 degradation by the above-mentioned methods is carried out by using four kinetic models (first order, second order, Behnajady and pseudo-first order). The pseudo-first order model is the one that best fits the experimental data in all the used degradation methods. Although when the degradation is performed in the presence of Fe(II), the Behnajady model presents correlation coefficients slightly higher than those of the pseudo-first order, the maximum experimental conversions obtained fit much better in all cases to the pseudo first order model.

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In situ Sn2+-incorporation synthesis of titanate nanotubes for photocatalytic dye degradation under visible light illumination

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2012.08.081 ◽

2013 ◽

Vol 546 ◽

pp. 95-101 ◽

Cited By ~ 15

Author(s):

Chien-Cheng Tsai ◽

Liang-Che Chen ◽

Te-Fu Yeh ◽

Hsisheng Teng

Keyword(s):

Visible Light ◽

Dye Degradation ◽

Titanate Nanotubes ◽

Light Illumination ◽

Visible Light Illumination ◽

Photocatalytic Dye Degradation

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One-Pot Synthesis of Au Supported Titania Composite Photocatalyst and its Photocatalytic Activities for Dye Degradation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.512-515.2080 ◽

2012 ◽

Vol 512-515 ◽

pp. 2080-2083

Author(s):

Qing Hong Zhang ◽

Wei Wei Yu ◽

Hong Zhi Wang

Keyword(s):

Dye Degradation ◽

Synthesis Method ◽

Titanate Nanotubes ◽

One Pot ◽

Isothermal Adsorption ◽

Composite Photocatalyst ◽

One Pot Synthesis ◽

Surface Areas ◽

Degradation Of Dyes ◽

Adsorption Desorption

Au supported titania composite photocatalyst was prepared by one-pot synthesis method where titanate nanotubes as supports and which was subsequently transformed into anatase TiO2 during the water vapor treatment. The composite was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and N2 isothermal adsorption-desorption. Au nanoparticles in the crystallite size of 10-15 nm were uniformly deposited onto the surface of titanate nanotubes or anatase TiO2 nanoparticles. Some nanotubes were kept even at 120 °C and the composite had specific surface areas ranged from 163 to 310 m2.g1 depending on the vapor temperature. The photocatalytic activity of the composite photocatalyst was evaluated in the degradation of dyes acid red G (ARG) and methylene blue (MB) under UV irradiation. Au supported TiO2 had good adsorption ability to dyes, and showed an enhanced photocatalytic efficiency compared to the pristine titanate nanotubes.

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Preparation and Application of Titanate Nanotubes on Dye Degradation from Aqueous Media by UV Irradiation

Journal of Spectroscopy ◽

10.1155/2015/680183 ◽

2015 ◽

Vol 2015 ◽

pp. 1-9 ◽

Cited By ~ 4

Author(s):

Rui Liu ◽

Wein-Duo Yang ◽

Hui-Ju Chueng ◽

Bin-Qiao Ren

Keyword(s):

Electron Microscopy ◽

Surface Area ◽

Uv Irradiation ◽

Dye Degradation ◽

Morphological Changes ◽

Irradiation Time ◽

Aqueous Media ◽

Titanate Nanotubes ◽

Hydrothermal Temperature ◽

Bet Analysis

Titanate nanotubes were synthesized by a hydrothermal method using commercial TiO2powder and then used as a photocatalyst. The titanate nanotubes were synthesized by varying the hydrothermal temperature from 110°C to 180°C. The morphological changes and phase transformation of the TiO2nanotubes were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The particles’ scattering behavior was investigated by Raman studies, and the surface area of the nanotubes was determined by a Brunauer, Emmett, and Teller (BET) analysis. Comparative studies show that the surface area of nanotubes increases with increasing temperature up to 130°C. The catalytic behavior of the synthesized nanotubes was also studied. The as-prepared titanate nanotubes were applied to methylene blue (MB, an organic dye) degradation in aqueous media by UV irradiation. Approximately 99% of the dye was removed from the aqueous media using 2 g/L titanate nanotube when the initial dye concentration was 9 mg/L. The total irradiation time was 2 h.

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Studies on the Fungal Pathogen of Dutch Elm Disease

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100098502 ◽

1981 ◽

Vol 39 ◽

pp. 400-401

Author(s):

H.M. Mazzone ◽

G. Wray ◽

R. Zerillo

Keyword(s):

Fungal Pathogen ◽

Fungal Growth ◽

Polymyxin B ◽

The United States ◽

Dutch Elm Disease ◽

Effective Control ◽

Sabouraud Agar ◽

Total Inhibition ◽

Zones Of Inhibition ◽

Control Plate

The fungal pathogen of the Dutch elm disease (DED), Ceratocystis ulmi (Buisman) C. Moreau, has eluded effective control since its introduction in the United States more than sixty years ago. Our studies on DED include establishing biological control agents against C. ulmi. In this report we describe the inhibitory action of the antibiotic polymyxin B on the causal agent of DED.In screening a number of antibiotics against C. ulmi, we observed that filter paper discs containing 300 units (U) of polymyxin B (Difco Laboratories) per disc, produced zones of inhibition to the fungus grown on potato dextrose agar or Sabouraud agar plates (100mm x 15mm), Fig. 1a. Total inhibition of fungal growth on a plate occurred when agar overlays containing fungus and antibiotic (polymyxin B sulfate, ICN Pharmaceuticals, Inc.) were poured on the underlying agar growth medium. The agar overlays consisted of the following: 4.5 ml of 0.7% agar, 0.5 ml of fungus (control plate); 4.0 ml of 0.7% agar, 0.5 ml of fungus, 0.5 ml of polymyxin B sulfate (77,700 U). Fig. 1, b and c, compares a control plate and polymyxin plate after seven days.

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