Thermal study of NaP zeolite with different morphologies

Huo, Zhiping; Xu, Xiangyu; Lv, Zhi; Song, Jiaqing; He, Mingyuan; Zhaofei, LI; Wang, Qian; Liang, Yan; Li, Yang

doi:10.1007/s10973-012-2301-y

Cited by 33 publications

(27 citation statements)

References 11 publications

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“…According to Breck 1 , this phenomena is usually observed when a higher symmetry array turns into a lower symmetry array; in this case, cubic zeolite NaP to tetragonal zeolite NaP. A similar behavior was observed in Huo et al 21 in which successive samples of zeolite NaP were synthesized with two different morphologies. XRD results (Figure 1) indicated that in the synthesized products were found as impurities, quartz and kaolinite, originated from the kaolin waste samples.…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 59%

“…In the KW sample (spectrum a in Figure 4), there are stretch bands of OH group at 3697, 3653 and 3621 cm Albert et al 24 while obtaining highly crystalline zeolite NaP. According to Huo et al 21 , frequencies near 1000 cm -1 are ascribed to asymmetric stretching of bonds Si-O or Al-O. Vibrations at 435 cm -1 are related to the deformation mode of the same bonds.…”

Section: Ir-spectroscopy (Ftir)mentioning

confidence: 95%

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Synthesis and characterization of zeolite NaP using kaolin waste as a source of silicon and aluminum

et al. 2014

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The synthesis of zeolite NaP using kaolin waste, from the Amazon region, as a predominant source of silicon and aluminum has been studied. The zeolitisation process occurred in hydrothermal conditions using static autoclaving and the effects of time, temperature, and the Si/Al ratio were investigated. The starting material and the phases formed as reaction products were characterized by XRD, SEM and FTIR. The results showed that pure zeolite NaP is hydrothermally synthesized, at 100 °C for 20 hours, using metakaolin waste material in alkaline medium in presence of additional silica. The XRD and SEM analyses indicate that the synthesized zeolite presents good crystallinity.

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Section: X-ray Diffraction (Xrd)mentioning

confidence: 59%

Section: Ir-spectroscopy (Ftir)mentioning

confidence: 95%

Synthesis and characterization of zeolite NaP using kaolin waste as a source of silicon and aluminum

et al. 2014

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“…As shown in Figure B, in the case of NaP‐RAW zeolite adsorbent, the asymmetric stretching and in‐plane bending vibration absorption peaks of Si–O appeared at 751 and 991 cm −1 , respectively . The bending vibration band at 561 cm −1 was assigned to the out‐of‐plane connection vibration absorption peak of Si–O . The symmetric stretching and out‐of‐plane bending vibration absorption peaks of Al–O appeared at 692 and 463 cm −1 , respectively .…”

Section: Resultsmentioning

confidence: 99%

“…36 The bending vibration band at 561 cm −1 was assigned to the outof-plane connection vibration absorption peak of Si-O. 37 The symmetric stretching and out-of-plane bending vibration absorption peaks of Al-O appeared at 692 and 463 cm −1 , respectively. 38,39 Peaks in the 500-1000 cm −1 range were the skeletal vibration bands of NaP.…”

Section: Synthesis Of Nap Zeolite Adsorbents Doped With Transition mentioning

confidence: 99%

In‐situ synthesis of NaP zeolite doped with transition metals using fly ash

et al. 2019

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Here, a novel approach has been proposed to synthesize NaP zeolite adsorbents doped with transition metals (M‐NaP) using the Na2SiO3 and NaAlO2 compounds extracted from fly ash via activation and stage treatment. The preparation process of M‐NaP employed the in‐situ synthesis in combination with organic complexation method. The effects of the addition amounts and valence state of transition metals on the zeolite products were investigated. The crystalline phase, morphology, and particle size of M‐NaP were characterized using X‐ray diffractometry (XRD), Scanning electron microscopy (SEM), and Laser particle size analyzer (PSD). The doping process was investigated using X‐ray photoelectron spectroscopy (XPS) and Materials Studio. The adsorption performance of M‐NaP was tested by the adsorption of Zn2+. The optimal molar ratio of n(Al2O3)/n(M) was identified as 8:1 for Co–NaP, Ni–NaP, and Fe–NaP, compared with 6:1 for Ti–NaP. The influence of transition metals on adsorption was: Co–NaP > Ni–NaP > Ti–NaP > Fe‐NaP. Due to largest surface area of Co–NaP (162.5 m2/g, five times than that of NaP‐RAW), the maximum removal rate of Zn2+ was above 99.50% at 25°C. The existence state of transition metals in M‐NaP primarily included: isomorphous substitution and balance of the skeletal charge, with the latter in majority. The simulation of Materials Studio indicates that Si at T4 was first substituted and then, Si at T3 opposite T4 was replaced when the replacement of Si in different sites occurred.

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“…na obtenção de zeólita NaP altamente cristalina.SegundoHuo et al (2012), freqüências observadas próximo a 1000 cm -1 , são atribuídas a estiramento asimétrico das ligações Si-O ou Al-O; assim como também, vibrações a 435 cm -1 , estão relacionadas ao modo de deformação destas mesmas ligações. Os picos próximos de 680 e 745 cm -1 são atribuídos ao estreitamento simétrico dos tetraedros internos da zeólita NaP, e o pico a 610 cm -1 indica a vibração do duplo anel que constitui a estrutura desta fase zeolítica.…”

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Síntese de zeólita do tipo faujasita utilizando rejeito de caulim da Amazônia como fonte de silício e alumínio: aplicação como adsorvente.

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Thermal study of NaP zeolite with different morphologies

Cited by 33 publications

References 11 publications

Synthesis and characterization of zeolite NaP using kaolin waste as a source of silicon and aluminum

Synthesis and characterization of zeolite NaP using kaolin waste as a source of silicon and aluminum

In‐situ synthesis of NaP zeolite doped with transition metals using fly ash

Síntese de zeólita do tipo faujasita utilizando rejeito de caulim da Amazônia como fonte de silício e alumínio: aplicação como adsorvente.

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