Photocatalytic degradation of a basic dye in water by nanostructured HPEI/TiO2 containing membranes

Mathumba, Penny; Maziya, Khona; Kuvarega, Alex T.; Dlamini, Langelihle Nsikayezwe; Malinga, Soraya P.

doi:10.17159/wsa/2020.v46.i3.8660

Cited by 6 publications

(5 citation statements)

References 22 publications

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“… 35 However, it is easy to agglomerate in the process of charging and discharging, which speeds up the capacity decay, and its cycle stability is poor. 36 The morphology of the material is a key factor affecting the electrochemical performance, 37 so the synthesis of TiO 2 nanoparticles is a feasible method to improve the performance of LIBs.…”

Section: Pure Nanostructured Tio 2 Materialsmentioning

confidence: 99%

Titanium dioxide-based anode materials for lithium-ion batteries: structure and synthesis

Shi

Jia

et al. 2022

RSC Adv.

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Section: Pure Nanostructured Tio 2 Materialsmentioning

confidence: 99%

Titanium dioxide-based anode materials for lithium-ion batteries: structure and synthesis

Shi

Jia

et al. 2022

RSC Adv.

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“…The results are shown in Figure 5 water droplets (20 µ The formation of the sponge-like morphology was due to the strong affinity of 1% CuO/TiO 2 @GCN (1:9) (0.5 wt%) to the CA membrane. This was a result of the rapid interchange between the solvent and non-solvent during the phase inversion fabrication process [48]. The porous 3D interconnected structures extend within the membranes with almost visible circular pores for allowing water to pass through.…”

Section: Surface Hydrophilicitymentioning

confidence: 99%

Energy-Efficient CuO/TiO2@GCN Cellulose Acetate-Based Membrane for Concurrent Filtration and Photodegradation of Ketoprofen in Drinking and Groundwater

et al. 2022

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Photocatalytic membranes possessing both photocatalytic and solid-liquid separation capabilities were developed. These materials are based on ternary 1% CuO/TiO2@GCN (1:9) embedded on cellulose acetate (CA) via the phase inversion method. The CA membranes containing 0.1, 0.3 and 0.5 wt% of 1% CuO/TiO2@GCN (1:9) (CTG–100, CTG–300 and CTG–500) were fabricated. The deposition of 1% CuO/TiO2@GCN (1:9) onto the CA membranes and the consequential changes in the materials’ properties were investigated with various characterization techniques. For instance, PXRD, FTIR, and XPS analysis provided evidence that photocatalytic membranes were formed. Electron microscopy and EDX were then used to visualize the photocatalytic membranes and show that the photocatalyst (1% CuO/TiO2@GCN (1:9)) was well dispersed onto the CA membrane. On the other hand, the properties of the photocatalytic membranes were scrutinized, where it was found that the membranes had a sponge-like morphology and that was significantly less hydrophilic compared to neat CA. The removal of KP in water using CTG–500 exhibited over 94% efficiency, while 38% for neat CA was achieved. Water permeability flux improved with increasing 1% CuO/TiO2@GCN (1:9) and hydrophilicity of the membranes. The electrical energy consumption was calculated and determined to be significantly lower than that of the CA membrane. The CTG–500 membrane after every cycle showed self-cleaning ability after operation in drinking and groundwater.

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“…The functional groups present on the membrane surfaces were confirmed by ATR‐FTIR spectroscopy as shown in Figure 1(a). The bands around 1150 and 1238 cm −1 are attributed to symmetric and asymmetric vibrations of sulfone (SO) functional groups on the PES polymer 41,48 . The vibrational bands at 1007 and 1299 cm −1 are due to stretching vibrations of the COC group.…”

Section: Resultsmentioning

confidence: 99%

Photodegradation of imidacloprid insecticide using polyethersulfone membranes modified with iron doped cerium oxide

Malatjie,

Moutloali,

Mishra

et al. 2024

J of Applied Polymer Sci

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The widespread accumulation of insecticides in water systems is a growing concern. This study reports efficient photodegradation of imidacloprid (IMD) insecticide using polyethersulfone (PES) membranes modified with iron‐doped cerium oxide (Fe‐CeO2). The work focuses on the modification of ultrafiltration polyethersulfone membranes with incremental amounts of Fe‐CeO2 photocatalysts (0.5–2.0 wt.%) using phase inversion method. An increase in Fe‐CeO2 content showed an improvement in surface roughness and porosity of membranes. Pure water flux (PWF) increased from 55.9 L m2 h−1 in M0 (PES) to 77.2 (M1, 0.5% Fe‐CeO2‐PES), 118.0 (M2, 1% Fe‐CeO2‐PES), 128.0 in M3 (1.5 wt.% Fe‐CeO2‐PES) and then decreased to 98.5 L m2 h−1 in M4 (2 wt.% Fe‐CeO2‐PES). This decrease is brought about by the high Fe‐CeO2 content, which minimizes the membranes' surface pores. Fe‐CeO2 photocatalysts are thought to give the membrane both hydrophilic and photocatalytic qualities because of their capacity to absorb light and create radical species that cause the photodegradation of IMD molecules. Consequently, under visible light irradiation, modified membranes demonstrated photocatalytic ability over IMD. Photocatalytic efficiencies of the membranes were found to be 5.2% (M0), 68.9 (M1), 75.8 (M2), 81.8 (M3), and 56.0% (M4), respectively, with M3 membranes showing the highest photocatalytic degradation efficiency and low leaching of metals. The remarkable performance observed by M3 membranes during both water filtration and photocatalytic performance may be an illustration of well dispersed photocatalyst which receives high absorption of light irradiation. Membranes with photocatalytic functionalities are tailored to exploit dual benefits of the membrane filtration and photocatalysis without compromising their original functions. However, maintaining the delicate balance of this phenomenon is still very challenging.

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Photocatalytic degradation of a basic dye in water by nanostructured HPEI/TiO2 containing membranes

Cited by 6 publications

References 22 publications

Titanium dioxide-based anode materials for lithium-ion batteries: structure and synthesis

Titanium dioxide-based anode materials for lithium-ion batteries: structure and synthesis

Energy-Efficient CuO/TiO2@GCN Cellulose Acetate-Based Membrane for Concurrent Filtration and Photodegradation of Ketoprofen in Drinking and Groundwater

Photodegradation of imidacloprid insecticide using polyethersulfone membranes modified with iron doped cerium oxide

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