Photodecolorization of Methyl Orange Using Silver Ion Modified TiO2 as Photocatalyst

Chen, Lung-Chyuan; Chou, Tse‐Chuan

doi:10.1021/ie00030a002

Cited by 49 publications

(28 citation statements)

References 16 publications

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“…4 -10 Ester crosslinks have been researched for the benefit of not using formaldehyde and the improvement of the strength for tensile and abrasion. At the same time, using nanometer titanium dioxide or other nanometer materials as catalysts has been investigated for many years to enhance the catalytic effect [11][12][13][14][15] on the improvement of some properties. Using nanometer-grade TiO 2 as a catalyst 16 to improve the crease recovery property of silk fabrics has been studied and maleic anhydride has been found to be a useful crosslinking agent.…”

Section: Introductionmentioning

confidence: 99%

Physical properties of crosslinked cellulose catalyzed with nano titanium dioxide

Wang

Chen

2005

J of Applied Polymer Sci

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Four different carboxylic acids, 1,2,3,4-butane tetracarboxylic acid (BTCA), maleic acid (MA), succinic acid (SUA), and citric acid (CA), were used as crosslinking agents to treat cotton fabrics in the presence of nanometer titanium dioxide (TiO 2 ) as a catalyst under UV irradiation. The dry crease recovery angle (DCRA) and wet crease recovery angle (WCRA) values of the treated fabrics were ranked BTCA Ͼ MA Ͼ CA Ͼ SUA and the tensile strength retention (TSR) values were ranked BTCA Ͻ MA Ͻ CA Ͻ SUA at a given resin concentration, catalyst concentration, and irradiation time period. The physical properties of the treated fabrics for nanometer silver/nanometer titanium dioxide (Ag/TiO 2 ) catalyst showed the same tendency. At a given DCRA, the WCRA values were ranked in the order BTCA Լ MA Ͼ CA Լ SUA; and at a given value of the TSR, the WCRA and DCRA values were both ranked in the order BTCA Ͼ MA Ͼ CA Ͼ SUA. The softness values of the carboxylic acid treated fabrics in the presence of nanometer TiO 2 catalyst were all better than that of the untreated fabric. Surface deposition of the treated fabrics for BTCA, which contains one vinyl double bond and four carboxylic acid groups, was higher than that for CA, which contains no vinyl double bond. IR spectra and electron spectroscopy for chemical analysis survey spectra showed the ester bond crosslink between the cellulose molecule and the various acids used in this study. The values of DCRA, WCRA, and add-on of the CA crosslinked fabrics for the mixed catalysts were in the order ZrO 2 /TiO 2 Ͻ SiO 2 /TiO 2 Ͻ Ag/ TiO 2 .

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Section: Introductionmentioning

confidence: 99%

Physical properties of crosslinked cellulose catalyzed with nano titanium dioxide

Wang

Chen

2005

J of Applied Polymer Sci

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“…Hence, it is clear that only nitrogen doping into NaTO lattice is not a predominant factor in the photooxidation of organic pollutants, but co‐doping nitrogen and Ag + /Cu 2+ into NaTO lattice enhanced the visible light photocatalytic activities. It was reported that Ag + ‐ and Cu 2+ ‐substituted TiO 2 has shown enhanced photoactivity due to effective scavenging of photogenerated electrons by the doped ions . During the photodegradation process, the substituted metal ions (Ag + /Cu 2+ ) in AgTON and CuTON trap the photo‐excited electrons, increasing the separation of electron–hole pairs which leads to higher photocatalytic activity compared to NaTON.…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic Performance of Nitrogen‐Doped and Cu²⁺ and Ag⁺ Co‐Doped Sodium Trititanate

Ravi

Veldurthi

Velchuri

et al. 2014

Int J Applied Ceramic Tech

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Nano‐sized (i) N‐doped sodium trititanate and (ii) N and Cu2+ (Ag+) co‐doped sodium trititanates CuTi3NO6−x (Ag2Ti3NO6−x) were prepared by a solid‐state and ion‐exchange methods, respectively. The materials were characterized by EDS, PXRD, XPS, FESEM, TEM, UV–visible DRS, and Raman spectroscopy. All the materials were crystallized in monoclinic lattice with P21/m space group. The bandgap energy of all the samples was deduced from their UV–visible DRS profiles. Visible‐light‐induced photocatalytic oxidation of the methylene blue (MB) and methyl orange (MO), cyclohexene and phenol, was examined. The Ag+ co‐doped trititanate exhibited the highest photocatalytic activity among the materials investigated.

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“…39 Acid crosslinking agents have attracted a great deal of scientific attention in recent years. 39, 40 Wang and Chen, through SEM images, showed that the surface of a BTCA‐treated fiber had a higher deposition of crosslinking agent, but CA‐treated and raw fibers had lower and no deposition of crosslinking agent, respectively. 39 It follows that higher amounts of TiO 2 could be absorbed on the surface of the wool.…”

Section: Resultsmentioning

confidence: 99%

Novel feature of nano‐titanium dioxide on textiles: Antifelting and antibacterial wool

Montazer

Pakdel

Behzadnia

2011

J of Applied Polymer Sci

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In this study, the antifelting and antibacterial features of wool samples treated with nanoparticles of titanium dioxide (TiO 2 ) were evaluated. To examine the antifelting properties of the treated samples, the fabric shrinkage after washing was determined. The antimicrobial activity was assessed through the calculation of bacterial reduction against Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive) bacteria. TiO 2 was stabilized on the wool fabric surface by means of carboxylic acids, including citric acid (CA) and butane tetracarboxylic acid (BTCA). Both oxidized samples with potassium permanganate and nonoxidized wool fabrics were used in this study. The relations between both the TiO 2 and carboxylic acid concentrations in the impregnated bath and the antifelting and antibacterial properties are discussed. With increasing concentration in the impregnated bath, the amount of TiO 2 nanoparticles on the surface of the wool increased; subsequently, lower shrinkage and higher antibacterial properties were obtained. The existence of TiO 2 nanoparticles on the surface of the treated samples was proven with scanning electron microscopy images and energy-dispersive spectrometry.

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Photodecolorization of Methyl Orange Using Silver Ion Modified TiO2 as Photocatalyst

Cited by 49 publications

References 16 publications

Physical properties of crosslinked cellulose catalyzed with nano titanium dioxide

Physical properties of crosslinked cellulose catalyzed with nano titanium dioxide

Photocatalytic Performance of Nitrogen‐Doped and Cu²⁺ and Ag⁺ Co‐Doped Sodium Trititanate

Novel feature of nano‐titanium dioxide on textiles: Antifelting and antibacterial wool

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Photodecolorization of Methyl Orange Using Silver Ion Modified TiO2 as Photocatalyst

Cited by 49 publications

References 16 publications

Physical properties of crosslinked cellulose catalyzed with nano titanium dioxide

Physical properties of crosslinked cellulose catalyzed with nano titanium dioxide

Photocatalytic Performance of Nitrogen‐Doped and Cu2+ and Ag+ Co‐Doped Sodium Trititanate

Novel feature of nano‐titanium dioxide on textiles: Antifelting and antibacterial wool

Contact Info

Product

Resources

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Photocatalytic Performance of Nitrogen‐Doped and Cu²⁺ and Ag⁺ Co‐Doped Sodium Trititanate