Improved photocatalytic activity of SnO2–ZnAl LDH prepared by one step Sn4+ incorporation

Mendoza-Damián, G.; Tzompantzi, Francisco; Mantilla, A.; Pérez-Hernández, R.; Hernández-Gordillo, Agileo

doi:10.1016/j.clay.2015.12.007

Cited by 80 publications

(44 citation statements)

References 43 publications

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“…Well known that hydroxyl radical reacts with TA, and produce 2‐hydroxy terephthalic acid, which emits fluorescence at almost 428 nm on the excitation of its own 315 nm absorption peak. The PL intensity was considerably increased at 428 nm with time in the presence of ZnTiO 3 @TiO 2 heterostructure nanomaterial as well as irradiation time, confirming that OH radical was generated on the surface of ZnTiO 3 @TiO 2 heterostructure nanomaterial under visible light …”

Section: Resultsmentioning

confidence: 71%

Synthesis of ZnTiO₃@TiO₂ Heterostructure Nanomaterial as a Visible light Photocatalyst

Bhagwat

Asiri³

et al. 2019

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Here ZnTiO3@TiO2 heterostructure nanomaterial was prepared through a simple sonochemical strategy using TiO2 (P25) with zinc nitrate as a precursor and then calcined the obtained sample at 700 °C in 2h for the photocatalytic degradation of Congo red dye solution. XRD result confirms that the diffraction patterns related to the ZnTiO3 and TiO2 as heterostructure with high purity. SEM confirms that particles are irregular in shape with high agglomeration and HRTEM reveals that ZnTiO3@TiO2 is highly crystalline with a lattice spacing of 0.37 nm. The calculated band gap of as‐synthesized ZnTiO3@TiO2 heterostructure nanomaterial is found to be 3.07 eV. The photocatalytic degradation of as prepared ZnTiO3@TiO2 heterostructure was investigated for the degradation of Congo red dye by varying the effect of catalyst amount and initial dye concentration. The ZnTiO3@TiO2 heterostructure nanomaterial exhibited 96% degradation efficiency of Congo red in 4h under visible light illumination. Moreover, the photodegradation mechanism of Congo red was studied with various scavengers such as EDTA, IPA, and Benzoquinone. Further, the detection of OH radicals during photocatalytic processes was confirmed by luminescence technique using terephthalic acid (TA) as a test molecule.

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Section: Resultsmentioning

confidence: 71%

Synthesis of ZnTiO₃@TiO₂ Heterostructure Nanomaterial as a Visible light Photocatalyst

Bhagwat

Asiri³

et al. 2019

ChemistrySelect

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“…The weak band at 1,633 cm −1 is due to the bending mode of water molecules. A very strong absorption peak at 1,360 cm −1 indicates the presence of

{CO}_{3}^{2 -}

in the interlayer space . The bands observed at low wave number value, i.e.…”

Section: Resultsmentioning

confidence: 94%

Synthesis of polyacrylamide/layered double hydroxides hybrid composite gel via in situ polymerization and study of its rheological and thermal behavior

et al. 2017

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A hybrid nanocomposite gel of layered double hydroxides (LDHs)/acrylamide was prepared by polymerization of acrylamide in the presence of LDH via sonochemical shaking method. Acrylamide monomer is initially intercalated in the interlayer of LDH and polymerized within the layers to get the hybrid gel. The morphology and structure properties of the prepared sample were characterized by FT‐IR, XRD, FESEM, particle size, as well as its flow behavior and rheology studies. Thermal analysis was investigated by thermogravimetric analysis method. The thermal analysis was performed at four different heating rates. The successful preparation of the nanocomposite and the intercalation of polyacylamide into the interlayer space of the LDH was confirmed by FT‐IR and XRD analysis. The synthesized gel exhibited a non‐Newtonian flow motion with a pseudo‐plastic behavior. Herschel‐Bulkley model gave a good description on the rheological behavior of the hybrid gel. Four mass loss steps were observed and could be attributed to the removal of weakly absorbed water from the external surface of the hydrotalcite, the removal of interlayer water, the decomposition of interlayer anions and dehydroxylation and the destruction of the layers of LDH, respectively. The apparent activation energy of the decomposition has been calculated by using Kissinger, Flynn‐Wall‐Ozawa (FWO) and modified Coats Redfern methods. The most probable mechanism function describing the nanocomposite degradation was found to be that of Jander equation: true(3/2true)[1−|1−bold-italicα1/3]−1(1−α)2/3. The results are of great interest in the understanding the thermodynamic properties of polyacrylamide/Mg‐Al layered double hydroxide hybrid nanocomposite gel and for its further applications. POLYM. COMPOS., 39:E1606–E1617, 2018. © 2017 Society of Plastics Engineers

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“…Hydroxy (OH) radical generates 2‐hydroxy terephthalic acid by reacting with Terephthalic acid which emits fluorescence at around 432 nm excited at 315 nm. From observation, the fluorescence intensity was significantly increased with the increase in irradiation period suggests that the OH radical is formed in the presence of PbTiO 3 nanorods during the photocatalytic reaction and therefore, the CR might have been degraded through OH radicals formed at the surface of PbTiO 3 nanorods …”

Section: Resultsmentioning

confidence: 98%

“…The catalyst dose plays an important role in the photocatalytic degradation process which can be seen in Figure (a) . In addition, for knowing more about the optimum catalyst dose for maximum photocatalytic degradation and to avoid excess catalyst, the catalyst dose was varied from 25, 50,75 and 100 mg in 100 mL Congo red dye solution, keeping the initial dye concentration of Congo red was 1 x 10 −5 M and pH 6 constant during all photocatalytic experiments .…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic Degradation of Congo Red Using PbTiO₃ Nanorods Synthesized via a Sonochemical Approach

Bhagwat

Asiri³

et al. 2018

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Lead titania (PbTiO 3 ) possessing nanorods morphology was synthesized through facile and straightforward sonochemical approach using titanium tetraisopropoxide and lead nitrate as a starting material followed by annealing at 700°C for 2 h and was utilized as an efficient photocatalyst to examine the degradation of Congo red dye (CR) under visible light. The assynthesized PbTiO 3 nanorods were characterized by physicalchemical methods such as phase identification, morphology, Chemical composition, and elemental analysis. To study the effect of PbTiO 3 nanorods on dye degradation, various experimental parameters such as photocatalyst dosage, pH, and initial dye concentration was optimized. About 92% dye was degraded at pH 6 in the existence of PbTiO 3 nanorods under visible light. To know the mineralization of Congo red in the presence of sonochemically synthesized PbTiO 3 nanorods, the total organic carbon (TOC) removal studies carried out and it shows about 46% Congo red can be totally abated in 150 min under visible light.

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Improved photocatalytic activity of SnO2–ZnAl LDH prepared by one step Sn4+ incorporation

Cited by 80 publications

References 43 publications

Synthesis of ZnTiO₃@TiO₂ Heterostructure Nanomaterial as a Visible light Photocatalyst

Synthesis of ZnTiO₃@TiO₂ Heterostructure Nanomaterial as a Visible light Photocatalyst

Synthesis of polyacrylamide/layered double hydroxides hybrid composite gel via in situ polymerization and study of its rheological and thermal behavior

Photocatalytic Degradation of Congo Red Using PbTiO₃ Nanorods Synthesized via a Sonochemical Approach

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Improved photocatalytic activity of SnO2–ZnAl LDH prepared by one step Sn4+ incorporation

Cited by 80 publications

References 43 publications

Synthesis of ZnTiO3@TiO2 Heterostructure Nanomaterial as a Visible light Photocatalyst

Synthesis of ZnTiO3@TiO2 Heterostructure Nanomaterial as a Visible light Photocatalyst

Synthesis of polyacrylamide/layered double hydroxides hybrid composite gel via in situ polymerization and study of its rheological and thermal behavior

Photocatalytic Degradation of Congo Red Using PbTiO3 Nanorods Synthesized via a Sonochemical Approach

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Synthesis of ZnTiO₃@TiO₂ Heterostructure Nanomaterial as a Visible light Photocatalyst

Synthesis of ZnTiO₃@TiO₂ Heterostructure Nanomaterial as a Visible light Photocatalyst

Photocatalytic Degradation of Congo Red Using PbTiO₃ Nanorods Synthesized via a Sonochemical Approach