Ceria and titania incorporated silica based catalyst prepared from rice husk: Adsorption and photocatalytic studies of methylene blue

Adam, Farook; Muniandy, Lingeswarran; Radhika, T.

doi:10.1016/j.jcis.2013.05.066

Cited by 37 publications

(8 citation statements)

References 38 publications

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“…The typical H3 hysteresis loops indicate that the slit-shaped mesopores are included in those catalysts. 50 Their BET specific surface areas (SSAs) are small and listed in Figure 1f. Among them, the desired Mo/S(0.2)-450 has the relative larger BET SSAs of ∼8.45 m 2 g −1 than those of the other catalysts.…”

Section: Resultsmentioning

confidence: 99%

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“Bulk” 1T/2H-MoS₂ with Tunable Phases and Residual S, N Co-Doped Carbon as a Highly Active and Durable Catalyst for Hydrogen Evolution

Yin

Chen

et al. 2019

ACS Appl. Energy Mater.

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Molybdenum sulfide (MoS2) is considered as low-cost catalyst with great potential for hydrogen evolution reaction (HER). In this contribution, a promising Mo-precursor was first designed and prepared via partial reduction of commercial (NH4)6Mo7O24·4H2O by dl-tartaric acid. A simple pyrolysis method as a new “bottom-up” approach was then developed to achieve the desired HER catalysts by using the Mo-precursor. The resulting catalysts consist of multiphasic 1T/2H-MoS2 and residual S, N co-doped carbon (SNC) with oxygen functional groups. In comparison with (NH4)6Mo7O24·4H2O, Mo-precursor with high content of Mo5+ promotes the full formation of MoS2, while its high content of carbon is more favorable to gain the residual SNC in the resulting catalysts. The further results demonstrate that the percentages of 1T-MoS2 and the content of the residual SNC can be facilely tuned by the pyrolysis temperatures or the Mo/S feeding molar ratios. Notably, although the resulting catalysts exhibit the “bulk” and irregular morphology with low specific surface areas, the high percentages of 1T-MoS2 as the primary advantage, the highly exposed active sites mainly stemming from disordered stacking of S–Mo–S layers, and the high content of the SNC residues are synergistically responsible for their high electrocatalytic HER activity. The high thermal stability of 1T-MoS2 and the excellent durability and stability during HER processes are attributed to the stabilizing effects of the residual SNC. Under the optimized synthetic conditions, the achieved Mo/S(0.2)-450 has a low overpotential of ∼130 mV at 10 mA cm–2, a low Tafel slope of 77 mV dec–1, a high specific activity of 17.53 μA cmCat.–2, and the excellent durability and stability in 0.5 M H2SO4. This work can provide a promising Mo-precursor and a facile route to developing the highly efficient HER catalysts.

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Section: Resultsmentioning

confidence: 99%

“…Figure f exhibits the III-type N 2 sorption isotherms of the resulting catalysts prepared at 450 °C. The typical H3 hysteresis loops indicate that the slit-shaped mesopores are included in those catalysts . Their BET specific surface areas (SSAs) are small and listed in Figure f.…”

Section: Results and Discussionmentioning

confidence: 99%

“Bulk” 1T/2H-MoS₂ with Tunable Phases and Residual S, N Co-Doped Carbon as a Highly Active and Durable Catalyst for Hydrogen Evolution

Yin

Chen

et al. 2019

ACS Appl. Energy Mater.

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“…However, in the absence of light with as prepared photoactive pristine titania material shows slight degradation for methylene blue discoloration reaction. Methylene blue is used as model compound for the all photo sensitive catalytic reaction study in presence and absence of sunlight and photo light irradiation at visible region and already some reports are reported using visible light driven catalysis on methylene blue degradation [20]. doped titania shows slow and steady increase in degradation of methylene blue with respect to reaction time.…”

Section: Resultsmentioning

confidence: 99%

SYNTHESIS AND OPTICAL PROPERTY CHARACTERIZATION OF METAL ION AND HETERO ATOM DOPED TiO2 NANOCOMPOSITE FABRICATION FOR PHOTO CATALYSIS

RAMALINGAM¹,

LOHEDAN²,

AL-DHAYAN³

et al. 2020

JOR

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The transition metal ions and heteroatoms such as iron cobalt and nickel modified titania were synthesized by insitu precipitation and hydrothermal technique. Prepared materials are further treated by thermal analysis towards crystalline phase formation. The particle size of prepared titania calculated from intense d-space values of prepared materials and it is found to be 22-23 nm. Raman spectra and the DR UV-Visible spectra of metal ion and nitrogen doped titania extends to the visible region (450-650 nm). Methylene blue (MB) dye degradation was performed to evaluate the photosensitivity property of the as prepared materials under sun light irradiation. Metal ion modified titania (0.01Fe- TiO2, 0.01CoTiO2 and 0.01Ni-TiO2) materials are showing complete degradation of MB. For the comparison purpose, the powder nanotitania samples are prepared and also coated on ITO (indium tin oxide) plates by electrodeposition method. XRD and DRS properties of coated titania were tested for electrode application.

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“…On the other hand, nanomaterials based catalytic oxidative and reductive degradation converts the toxic pollutants into harmless components and the process is low-cost, convenient, fast and environment-friendly as well. Oxidative degradation includes the photocatalytic degradation of pollutants by nanoparticle of TiO 2 , ZnO using "advanced oxidation process" [4][5][6]. Reductive degradation of the pollutants can be achieved by using metal nanoparticle as catalyst in combination with a common reducing agent like NaBH 4 [7].…”

Section: Introductionmentioning

confidence: 99%

Catalytic and antibacterial activity of copper nanoparticle-starch composite

Dinda¹

2021

Advanced Materials Proceedings

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We report the successful synthesis of copper nanoparticle (CuNP)-starch composite employing low cost green protocol without inert gas protection. UV-Vis spectroscopy, X-Ray diffraction (XRD) and Transmission electron microscopy (TEM) were used to characterize the CuNP-starch composite. Mono-disperse almost spherical CuNP having average diameter 4.02 ± 0.076 nm was obtained. The catalytic activity of the as-synthesized CuNP-starch composite during reduction of pollutants, like, 4-nitrophenol (4-NP) and dyes, Eosine Blue (EB), Eriochrome Black T (EBT) and Brilliant Cresyl Blue (BCB by NaBH 4 has been investigated. High catalytic efficiency of the composite was demonstrated by rapid decrease of the intensity of the UV-Vis absorption peaks at respective λ max of the pollutants with time when reaction mixture contained NaBH 4 and small quantity of CuNP-starch composite. The rate constant of each processes was calculated by considering that the reactions follow pseudo-first-order kinetics with respect to substrate. The obtained rate constants for 4-NP, EB, EBT and BCB are 0.021S -1 , 0.011S -1 , 0.036S -1 and 0.032S -1 respectively. The other application, antibacterial activity was tested against Gm positive and Gm negative bacteria. Plate count and minimum inhibitory concentration (MIC) studies show higher susceptibility of Gm positive bacteria towards CuNP-starch composite. The as-synthesized CuNP-starch composite may find potential application in the field of environmental remedies and antibacterial formulations. Copyright©2018 VBRI Press.

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Ceria and titania incorporated silica based catalyst prepared from rice husk: Adsorption and photocatalytic studies of methylene blue

Cited by 37 publications

References 38 publications

“Bulk” 1T/2H-MoS₂ with Tunable Phases and Residual S, N Co-Doped Carbon as a Highly Active and Durable Catalyst for Hydrogen Evolution

“Bulk” 1T/2H-MoS₂ with Tunable Phases and Residual S, N Co-Doped Carbon as a Highly Active and Durable Catalyst for Hydrogen Evolution

SYNTHESIS AND OPTICAL PROPERTY CHARACTERIZATION OF METAL ION AND HETERO ATOM DOPED TiO2 NANOCOMPOSITE FABRICATION FOR PHOTO CATALYSIS

Catalytic and antibacterial activity of copper nanoparticle-starch composite

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Ceria and titania incorporated silica based catalyst prepared from rice husk: Adsorption and photocatalytic studies of methylene blue

Cited by 37 publications

References 38 publications

“Bulk” 1T/2H-MoS2 with Tunable Phases and Residual S, N Co-Doped Carbon as a Highly Active and Durable Catalyst for Hydrogen Evolution

“Bulk” 1T/2H-MoS2 with Tunable Phases and Residual S, N Co-Doped Carbon as a Highly Active and Durable Catalyst for Hydrogen Evolution

SYNTHESIS AND OPTICAL PROPERTY CHARACTERIZATION OF METAL ION AND HETERO ATOM DOPED TiO2 NANOCOMPOSITE FABRICATION FOR PHOTO CATALYSIS

Catalytic and antibacterial activity of copper nanoparticle-starch composite

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“Bulk” 1T/2H-MoS₂ with Tunable Phases and Residual S, N Co-Doped Carbon as a Highly Active and Durable Catalyst for Hydrogen Evolution

“Bulk” 1T/2H-MoS₂ with Tunable Phases and Residual S, N Co-Doped Carbon as a Highly Active and Durable Catalyst for Hydrogen Evolution