Characterization and performance of porous photocatalytic ceramic membranes coated with TiO2 via different dip-coating routes

Alias, Siti Salwa; Harun, Zawati; Latif, Intan Suyana Abd

doi:10.1007/s10853-018-2392-3

Cited by 44 publications

(10 citation statements)

References 23 publications

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“…As expected earlier, the density of green CWFs decreases as the porosity increases. This trend is following the other density and porosity plots of the porous kaolin-based ceramic membrane for separation, which similarly showed an inverse pattern between these two parameters (Alias et al, 2018). Additionally, water absorption also strongly depends on the porosity.…”

Section: Physical Properties Of the Ceramic Water Filter With Different Additivessupporting

confidence: 69%

Characterization and performance of rice husk as additive in green ceramic water filter fabricated by slip-casting

Alias

Harun

Mansor

2020

WJE

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Purpose The purpose of this study is to investigate the using of rice husk (RH) which is a green material derived from agricultural waste with the ability to absorb heavy metal. It has been used in wastewater treatment. In this research, a kaolin-based green ceramic water filter (CWF) incorporated with two different additives (RH and zeolite-based RH ash [RHA]) was successfully fabricated. Design/methodology/approach The weight ratio of kaolin:additive was varied (90:10, 80:20 and 70:30) and fabricated via the slip-casting technique. The green CWFs were dried (60°C for 1 h), followed by sintering (1,200°C). Findings The green CWF of kaolin:RH with a weight ratio of 70:30 showed the best properties and satisfactory performance with a porous cross-section microstructure, highest porous area (4.58 µm2), good structure, lowest shrinkage (8.00%), highest porosity (45.10%), lowest density (1.79 g cm−3), highest water absorption (55.50%) and hardness (241.40 Hv). This green CWF has also achieved good permeability (42.00 L m−2h−1) and removal of the textile dye (27.88%). The satisfactory characterization and good textile dye removal performance (75.47%) were also achieved from green CWF with kaolin:zeolite at a weight ratio of 80:20. Research limitations/implications This research is focused on green CWF and zeolite at a certain amount with the specific characterization analysis methods. Practical implications The use of low-cost waste materials to treat dye wastewater from agricultural by-products/wastes sources in treating the dye will enhance the using of green material. Social implications Avoiding the waste sludge that can pollute the environment can create a health issue. The use of low-cost waste materials to treat dye wastewater from agricultural by-products/wastes sources in treating the dye can avoid the waste sludge that can pollute the environment and create serious health issue. Originality/value All the kaolin-based green CWFs incorporated with two different additives (RH and zeolite-based RHA) fabricated using a simple slip-casting technique have shown the potential to be used as a filter in wastewater treatment applications.

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Section: Physical Properties Of the Ceramic Water Filter With Different Additivessupporting

confidence: 69%

Characterization and performance of rice husk as additive in green ceramic water filter fabricated by slip-casting

Alias

Harun

Mansor

2020

WJE

Self Cite

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“…The method can be used for modification of both polymer and inorganic membranes. Alias et al [65] used dip-coating for preparation of ceramic membranes ( Figure 1a). First, they obtained ceramic membranes by phase inversion technique from a casting solution containing PES as a binder, N-methyl-2-pyrrolidone (NMP) as a solvent and kaolin powder as membrane forming component.…”

Section: Pmrs With Immobilized Photocatalyst (Pmrs With Pms)mentioning

confidence: 99%

“…There are several reports on the removal of dyes, such as methylene blue (MB) [57,64,143], rhodamine B (RhB) [144] and eosin yellow [30]; pharmaceuticals, including ibuprofen [59], diclofenac [58], carbamazepine [53] and tetracycline [61]; or other pollutants, e.g., phenol [66], humic acids [60,65], and pesticides such as diuron and chlorfenvinphos [145]. There are also reports on using PMs for purification of simulated brackish water and seawater from methyl orange and diphenhydramine [134], as well as secondary effluents from pharmaceuticals [146].…”

Section: Applications Of Pmrs With Pmsmentioning

confidence: 99%

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Overview of Photocatalytic Membrane Reactors in Organic Synthesis, Energy Storage and Environmental Applications

et al. 2019

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This paper presents an overview of recent reports on photocatalytic membrane reactors (PMRs) in organic synthesis as well as water and wastewater treatment. A brief introduction to slurry PMRs and the systems equipped with photocatalytic membranes (PMs) is given. The methods of PM production are also presented. Moreover, the process parameters affecting the performance of PMRs are characterized. The applications of PMRs in organic synthesis are discussed, including photocatalytic conversion of CO2, synthesis of KA oil by photocatalytic oxidation, conversion of acetophenone to phenylethanol, synthesis of vanillin and phenol, as well as hydrogen production. Furthermore, the configurations and applications of PMRs for removal of organic contaminants from model solutions, natural water and municipal or industrial wastewater are described. It was concluded that PMRs represent a promising green technology; however, before the application in industry, additional studies are still required. These should be aimed at improvement of process efficiency, mainly by development and application of visible light active photocatalysts and novel membranes resistant to the harsh conditions prevailing in these systems.

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“…This improvement was ascribed to the surface-catalytic reactions between ozone and CuMn 2 O 4 particles that enhanced the ozone self-decompose to generate. Other reactive membrane systems (e.g., microwave-enhanced membrane filtration [29], photocatalytic ceramic membrane [24,25,[30][31][32], and electrochemical ceramic membrane [33][34][35][36]) were recently tested for their removal capabilities of various micropollutants including 1,4-dioxane, dyes, and drugs.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Degradation of Sulfamethoxazole (SMX) in Toilet Wastewater by Photo-Fenton Reactive Membrane Filtration

Sun

Yao

et al. 2020

Nanomaterials

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Pharmaceutical residuals are increasingly detected in natural waters, which made great threat to the health of the public. This study evaluated the utility of the photo-Fenton ceramic membrane filtration toward the removal and degradation of sulfamethoxazole (SMX) as a model recalcitrant micropollutant. The photo-Fenton catalyst Goethite (α-FeOOH) was coated on planar ceramic membranes as we reported previously. The removal of SMX in both simulated and real toilet wastewater were assessed by filtering the feed solutions with/without H2O2 and UV irradiation. The SMX degradation rate reached 87% and 92% respectively in the presence of UV/H2O2 for the original toilet wastewater (0.8 ± 0.05 ppb) and toilet wastewater with a spiked SMX concentration of 100 ppb. The mineralization and degradation by-products were both assessed under different degradation conditions to achieve deeper insight into the degradation mechanisms during this photo-Fenton reactive membrane filtration. Results showed that a negligible removal rate (e.g., 3%) of SMX was obtained when only filtering the feed solution through uncoated or catalyst-coated membranes. However, the removal rates of SMX were significantly increased to 67% (no H2O2) and 90% (with H2O2) under UV irradiation, respectively, confirming that photo-Fenton reactions played the key role in the degradation/mineralization process. The highest apparent quantum yield (AQY) reached up to approximately 27% when the H2O2 was 10 mmol·L−1 and UV254 intensity was 100 μW·cm−2. This study lays the groundwork for reactive membrane filtration to tackle the issues from micropollution.

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Characterization and performance of porous photocatalytic ceramic membranes coated with TiO2 via different dip-coating routes

Cited by 44 publications

References 23 publications

Characterization and performance of rice husk as additive in green ceramic water filter fabricated by slip-casting

Characterization and performance of rice husk as additive in green ceramic water filter fabricated by slip-casting

Overview of Photocatalytic Membrane Reactors in Organic Synthesis, Energy Storage and Environmental Applications

Enhanced Degradation of Sulfamethoxazole (SMX) in Toilet Wastewater by Photo-Fenton Reactive Membrane Filtration

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