Influence of zinc oxide nanoparticles in the nanofiltration of hazardous Congo red dyes

Hairom, Nur Hanis Hayati; Mohammad, Abdul Wahab; Kadhum, Abdul Amir Hassan

doi:10.1016/j.cej.2014.08.068

Cited by 51 publications

(12 citation statements)

References 24 publications

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“…For this reason, these agglomerations lead to a bad distribution of metal nanoparticles along both polymer structure and surface, negatively altering membrane flux and antifouling properties by changing parameters such as surface roughness and hydrophilicity [47,51,52]. Some researchers suggested that the preparation of nanoparticles with a stabilizer and the use of ultrasonication could be applied in order to prevent the agglomeration of metal nanoparticles [53,54].…”

Section: Morphological Studymentioning

confidence: 99%

Comparison between hydrophilic and hydrophobic metal nanoparticles on the phase separation phenomena during formation of asymmetric polyethersulphone membranes

García-Ivars

Iborra–Clar

Alcaina–Miranda

et al. 2015

Journal of Membrane Science

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ElsevierGarcía Ivars, J.; Iborra Clar, MI.; Alcaina Miranda, MI.; Van Der Bruggen, B. (2015). Comparison between hydrophilic and hydrophobic metal nanoparticles on the phase separation phenomena during formation of asymmetric polyethersulphone membranes. ABSTRACTInorganic nanoparticles have been applied as additive in membrane synthesis for improving different properties from the base polymer such as hydrophilicity, fouling resistance or permselectivity. To investigate the changes caused by the presence of the inorganic nanoparticles in the formation of the membrane structure, two different metallic compounds with opposite hydrophilicity were used as additives: hydrophilic zinc oxide (ZnO) and hydrophobic tungsten disulphide (WS 2 ). For this purpose, the effect of these metal nanoparticles at ultra-low concentrations (0.05 and 0.25 wt% metal nanoparticles/polymer ratio) in the preparation of flat-sheet membranes based on polyethersulphone (PES) by immersion-precipitation method was investigated. Nmethyl-2-pyrrolidone (NMP) was used as solvent. The influence of both metal nanoparticles on the characteristics and permselective properties of PES membranes was studied with microscopic observations, contact angle measurements, and filtration experiments. Although the incorporation of metal nanoparticles could turn the system into thermodynamically unstable, the demixing process during formation of membranes was slightly delayed, suppressing the macrovoid formation (remarkably using WS 2 ).Regardless the nature of the metal nanoparticles, results showed an overall improvement in membrane hydrophilicity and permselectivity by adding metal nanoparticles compared to the control PES membrane, demonstrating that the behaviour of both metal nanoparticles at ultra-low concentrations was very similar.

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Section: Morphological Studymentioning

confidence: 99%

Comparison between hydrophilic and hydrophobic metal nanoparticles on the phase separation phenomena during formation of asymmetric polyethersulphone membranes

García-Ivars

Iborra–Clar

Alcaina–Miranda

et al. 2015

Journal of Membrane Science

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“…Similar result was reported by Adams et al [28] whereby no diffraction peaks assigned to Pd species were detected on the TiO2, SiO2 and Al2O3 supports due to the small amount and well distribution Pd species on the surface of the support. Furthermore, several peaks at 2θ = 34.5° (002), 36.3° (101), 47.6° (102), and 56.7° (110), which are characteristic peaks of ZnO wurtzite structure were observed on Zn/mZSM5 [29]. In brief, the XRD results indicated that no significance structural degradation was observed after metal introduction and the impregnated metals (Rh, Co, Pd and Zn) are mainly exists as metal oxides form.…”

Section: Physicochemical Properties Of Catalystsmentioning

confidence: 98%

Catalytic CO Methanation over Mesoporous ZSM5 with Different Metal Promoters

Teh

Triwahyono

Jalil

et al. 2019

Bull. Chem. React. Eng. Catal.

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The carbon monoxide methanation has possessed huge potential as an effective method to produce synthetic natural gas (SNG). The basic requirements such as high catalytic activity at low temperatures (<500 °C) and high stability throughout all temperatures is needed for an ideal methanation catalysts. The ultimate goal of the study is to examine the influential of different metal promoters towards catalytic properties and catalytic CO methanation performance. A series of metal promoters (Rh, Co, Pd and Zn) mesoporous ZSM5 were synthesized using an incipient-wetness impregnation method and evaluated for catalytic CO methanation. XRD analysis showed that only metal oxides and no metallic phase of Rh, Co, Pd, and Zn were observed. The nitrogen physisorption analysis showed that mZSM5 possessed high surface area and micro-mesoporosity with intra-and interparticle pores. FE-SEM analysis illustrated that mZSM5 had typical coffin-type morphology and Rh metal dispersed on the surface of the support was confirmed by EDX analysis. Moreover, Rh (CO conversion = 95%, CH4 yield = 82%) and Co (CO conversion = 91%, CH4 yield = 71%) promoters showed significant improvement in CO methanation. On the other hand, Pd (CO conversion = 18%, CH4 yield = 12%) and Zn (CO conversion = 10%, CH4 yield = 9%) promoters had only low benefit to the CO methanation. This study affirmed that the catalytic activity of CO methanation was influenced by the variation in the type of metal loading due to different nature of metallic phases and their synergistic interaction with the supporting material.

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“…The results portray the ability of the both photocatalyst to recover event though there might be slightly different of their performance. In addition, The smaller size of the ZnO-PEG really affected its capability in degrading the colour of POME due to higher effective surface area [11].…”

Section: Turbidity Reduction Percentage Analysismentioning

confidence: 99%

“…The performance of the photocatalyst such as ZnO nanoparticles in the photocatalysis process is undeniable especially in the utilization of coupling photocatalytic reactor and membrane. Recently, Desa et al, and Chiranont et al, reported that ZnO-PVP and ZnO-PEG nanoparticles have a great potential as a photocatalyst for industrial dye wastewater treatment [10][11]. Along with its steady wurtzite structure and wide bandgap (3.4 eV) compound semiconductor, ZnO nanoparticles has been generally used as a catalyst for dye wastewater treatment [11] By using ZnO as photocatalyst, Hairom et al, managed to achieve 100% colour removal, 100% turbidity reduction, 100% suspended solid rejection by coupling the photocatalysis and the membrane filtration [12].…”

Section: Introductionmentioning

confidence: 99%

Reusability Performance of Zinc Oxide Nanoparticles for Photocatalytic Degradation of POME

et al. 2018

Self Cite

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Performance and reusability of different zinc oxide nanoparticles (ZnO-PVP and ZnO-PEG) for photocatalytic degradation of palm-mill oil effluent (POME) has been studied. The nanoparticles properties were characterised with fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The TEM results show that ZnO-PEG nanoparticles exhibit the smaller size than ZnO-PVP with less agglomeration. It was found that ZnO-PEG shows better effectiveness than ZnO-PVP in reducing turbidity, colour and increasing the dissolved oxygen (DO). By using two types of reusability methods: (a) oven drying (b) hot water rinsing, the oven drying method portrayed the most efficient route for POME treatment. This research would be a solution to the palm oil industry for photocatalyst recovering as well as reduction of the chemical usage in order to meet the development of advanced and greener technologies.

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Influence of zinc oxide nanoparticles in the nanofiltration of hazardous Congo red dyes

Cited by 51 publications

References 24 publications

Comparison between hydrophilic and hydrophobic metal nanoparticles on the phase separation phenomena during formation of asymmetric polyethersulphone membranes

Comparison between hydrophilic and hydrophobic metal nanoparticles on the phase separation phenomena during formation of asymmetric polyethersulphone membranes

Catalytic CO Methanation over Mesoporous ZSM5 with Different Metal Promoters

Reusability Performance of Zinc Oxide Nanoparticles for Photocatalytic Degradation of POME

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