Fabrication of TiO2/MoS2@zeolite photocatalyst and its photocatalytic activity for degradation of methyl orange under visible light

Zhang, Weiping; Xiao, Xinyan; Zheng, Lili; Chen, Wan

doi:10.1016/j.apsusc.2015.08.054

Cited by 137 publications

(38 citation statements)

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“…In addition, the presence of a peak in 2h = 28°r elated to the TiO 2 species is an indication of the existence of TiO 2 in the pores of zeolite [27,28]. Meanwhile, broadening of a peak in the region of 22°-35°is related to the presence of TiO 2 nanoparticles on zeolite structures [29].…”

Section: Resultsmentioning

confidence: 96%

Host (nanocavity of dealuminated Y zeolite)-guest (Ce(IV) salophen/TiO2) nanocomposite materials as an efficient photocatalyst for degradation of 4-nitrophenol

2016

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Ce(IV) salophen encapsulated into dealuminated Y zeolite was prepared by the flexible ligand method. Incorporation of TiO 2 into nanocages of dealuminated Y zeolite was performed by the impregnation method. The obtained photocatalyst was characterized by FT-IR, XRD, DRS, SEM, EDS and ICP techniques. The amount of Ce(salophen) in the zeolite supercages was 0.07 mg/g of encapsulated zeolite. This catalytic system was investigated in the photodegradation of 4-nitrophenol. In this work, the effect of dark conditions, and visible and UV illumination was investigated for the degradation of 4-nitrophenol. In addition, the effect of other parameters including catalyst loading, H 2 O 2 and TiO 2 was studied in the degradation of 4-nitrophenol. The obtained results reveal that the photocatalyst performance depends on catalyst loading, the presence of H 2 O 2, and UV illumination.

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Section: Resultsmentioning

confidence: 96%

Host (nanocavity of dealuminated Y zeolite)-guest (Ce(IV) salophen/TiO2) nanocomposite materials as an efficient photocatalyst for degradation of 4-nitrophenol

2016

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“…•− ) in photo-catalytic reaction and the superoxide radical anions is the mainly oxidation species in the photo-catalytic reaction. Jiang et al recently reported a novel ternary photocatalyst composed of TiO 2 -In 2 O 3 nanocrystals decorated with graphitic carbon nitride g-C 3 N 4 for dye degradation and H 2 evolution [186] . These ternary composites exhibited the highest RhB degradation rate, which is 6.6 times higher than that of g-C 3 N 4 .…”

Section: The New Promising Semiconductors In Photo-degradation Of Dyesmentioning

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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“…Until [20]. However, researches have been rarely studied for MoS 2 /TiO 2 heterostructure thin film.…”

Section: Introductionmentioning

confidence: 99%

Investigating Visible-Photocatalytic Activity of MoS₂/TiO₂ Heterostructure Thin Films at Various MoS₂ Deposition Times

Phung

Tran

Nguyen

et al. 2017

Journal of Nanomaterials

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MoS 2 /TiO 2 heterostructure thin films were fabricated by sol-gel and chemical bath deposition methods. Crystal structure, surface morphology, chemical states of all elements, and optical property of the obtained thin films were characterized by using X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and UV-Vis spectroscopy techniques, respectively. Photocatalytic activity of all thin films was evaluated by measuring decomposition rate of methylene blue solution under visible light irradiation. The results indicate that ultrathin MoS 2 film on TiO 2 -glass substrate improves photocatalytic activity of TiO 2 in the visible light due to the efficient absorption of visible photon of MoS 2 few layers and the transfer of electrons from MoS 2 to TiO 2 . All MoS 2 /TiO 2 heterostructure thin films exhibit higher visible light photocatalytic activity than that of pure MoS 2 and TiO 2 counterparts. The best MoS 2 /TiO 2 heterostructure thin film at MoS 2 layer deposition time of 45 minutes can decompose about 60% MB solution after 150 minutes under visible light irradiation. The mechanism of the enhancement for visible-photocatalytic activity of MoS 2 /TiO 2 heterostructure thin film was also discussed.

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Fabrication of TiO2/MoS2@zeolite photocatalyst and its photocatalytic activity for degradation of methyl orange under visible light

Cited by 137 publications

References 50 publications

Host (nanocavity of dealuminated Y zeolite)-guest (Ce(IV) salophen/TiO2) nanocomposite materials as an efficient photocatalyst for degradation of 4-nitrophenol

Host (nanocavity of dealuminated Y zeolite)-guest (Ce(IV) salophen/TiO2) nanocomposite materials as an efficient photocatalyst for degradation of 4-nitrophenol

Advances in Photo-catalytic Materials for Environmental Applications

Investigating Visible-Photocatalytic Activity of MoS₂/TiO₂ Heterostructure Thin Films at Various MoS₂ Deposition Times

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Fabrication of TiO2/MoS2@zeolite photocatalyst and its photocatalytic activity for degradation of methyl orange under visible light

Cited by 137 publications

References 50 publications

Host (nanocavity of dealuminated Y zeolite)-guest (Ce(IV) salophen/TiO2) nanocomposite materials as an efficient photocatalyst for degradation of 4-nitrophenol

Host (nanocavity of dealuminated Y zeolite)-guest (Ce(IV) salophen/TiO2) nanocomposite materials as an efficient photocatalyst for degradation of 4-nitrophenol

Advances in Photo-catalytic Materials for Environmental Applications

Investigating Visible-Photocatalytic Activity of MoS2/TiO2 Heterostructure Thin Films at Various MoS2 Deposition Times

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Investigating Visible-Photocatalytic Activity of MoS₂/TiO₂ Heterostructure Thin Films at Various MoS₂ Deposition Times