Chemical and physical characterization of a natural clay and its use as photocatalyst for the degradation of the methabenzthiazuron herbicide in water

Khennaoui, Badis; Zehani, Fouzia; Malouki, Moulay Abderrahmane; Menacer, Rafik; Canle, Moisés

doi:10.1016/j.ijleo.2020.165024

Cited by 10 publications

(8 citation statements)

References 37 publications

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“…However, Khennaoui et al (2020) have reported that Algerian natural clay showed an intense UV-vis absorption band situated at 201 nm and four weak bands situated at 243, 248, 366 and 430 nm. It was thought that balance between SiO2 and TiO2 could alter the photocatalytic activity of the mechanical mixed clay in this study.…”

Section: Optical Analysis Of Gol; 5 % Cnt-gol and 10 % Cnt-golmentioning

confidence: 99%

“…The X-ray diffraction (XRD) patterns of (black colour) GOL clay, (red colour) 5% CNT-GOL clay and (green colour) 10% CNT-GOL clay samples are shown in Figure 3 previously (Zhu et al, 2004;Oh et al, 2010). The peaks corresponding to TiO2 from karrooite SiO2, Al2O3, Fe2O3 and TiO2 which was successfully used as photocatalyst for the degradation of the methabenzthiazuron herbicide in water (Khennaoui, et al, 2020). for GOL clay blended with CNT were due to internal hydroxyls linked to the aluminium (Chargui et al, 2018).…”

Section: Chemical Phases Determination and Functional Groups Identifi...mentioning

confidence: 99%

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Titania containing natural clay doped with carbon nanotubes for enhanced natural photocatalytic discoloration of wastewater

et al. 2021

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Water contamination with dyes is harmful to humans and the environment. This study investigated the photocatalytic activity of natural clay (GOL) mixed with carbon nanotubes (CNT) for removal of brilliant black (BB) in wastewater. The materials were characterized with FESEM-EDS, XRD, XRF, FTIR and UV-vis DRS. The natural clay contains 2.34 % TiO2 which is 75 % more than most natural clays. SEM showed that CNT were well dispersed and mixed with clay. DRS spectra showed two absorption bands above 380 nm. CNT in GOL has decreased significantly the energy band gaps from 2.75 and 3.25 eV to 1.53 and 2.90 eV for GOL and 10 % CNT-GOL respectively. Photocatalytic activity was enhanced with degradation of BB increased from 66 % to 95 % with GOL and 10 % CNT-GOL respectively after 45 min of visible light irradiation. The improvement can be attributed to the synergy of the interface heterojunction of clay and CNT. The presence of CNT reduces the e − and h + (e − / h + ) pairs recombination, facilitates the production of reactive oxygen species responsible for the decay of dye. The addition of H2O2 to the experiment (2 mmoL) confirmed the role of holes and hydroxyl radicals. 85 % of BB carbon content was removed with 10 % CNT-GOL suggesting that mineralization occurred. After 45 min of visible light irradiation, the degradation kinetic studies followed a second-order reaction with a R 2 = 0.997. Therefore, natural clay-CNT nanocomposites can be applied to treat dyes containing wastewaters.

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Section: Optical Analysis Of Gol; 5 % Cnt-gol and 10 % Cnt-golmentioning

confidence: 99%

Section: Chemical Phases Determination and Functional Groups Identifi...mentioning

confidence: 99%

Titania containing natural clay doped with carbon nanotubes for enhanced natural photocatalytic discoloration of wastewater

et al. 2021

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“…The largest silica alumina content is found in clay minerals. Clay is one of the most prevalent materials on the Earth's surface and the most important minerals due to it is a major component in some applications, such as an adsorbent, support catalyst, and as a raw material in ceramic fabrication (Khennaoui et al, 2020;Putri et al, 2023). The properties of natural clay are one of the crucial factors that must be researched before using clay in this application.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Investigations of Natural Clay From Pattallassang District, Takalar Regency, South Sulawesi Province, Indonesia

et al. 2023

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The study aimed to investigate the microstructure of natural clay from Pattallassang District, Takalar Regency, South Sulawesi Province. The clay was characterized using X-ray diffractometer (XRD), surface area analyzer (SAA), and scanning electron microscope (SEM). The XRD analysis showed that the main mineral composition of the clay was kaolinite, quartz, hematite, geothite, magnetite, and anatase phases. The SAA using BET analysis shows the large surface area of 59.26 m2/g and BJH analysis for pore distribution of 32.77 nm. SEM observations revealed that the clay consists of plate-like kaolinite particles arranged randomly. The results indicate that the natural clay from Pattallassang District has good potential for use in various industrial applications due to its high kaolinite content and favorable microstructure.Keywords: kaolinite, microstructure, mineral, clay.

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“…Clay is one of the essential minerals because it is used as a primary material in various industries, such as in ceramic fabrication (Putri et al, 2018), as an adsorbent, and as a photocatalyst (Khennaoui et al, 2020). One of the essential things that must be studied before using clay in this application is the mineral content, metal oxides, and characteristics of natural clay.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Natural Clay from Gowa Regency, South Sulawesi Province, Indonesia

Side

Putri

2022

J. Akademika Kimia

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Clay is one of the essential natural minerals in human life, especially in the industrial sector, which is widely used as a raw material for ceramics fabrication, adsorbents, and photocatalysts. The characteristics of clay significantly affect the quality of the resulting material. This study will study the aspects of natural clay in Gowa Regency, South Sulawesi Province, without the leaching process and with acid leaching. Acid leaching uses 3 M HCl, previously roasted at a temperature of 600 oC. The characterization consisted of metal oxide analysis using XRF, mineral content analysis using XRD, morphological analysis, and compound content using SEM-EDX. The results showed that the primary metal oxide content in natural clay was Fe2O3, Al2O3, and SiO2, the content of Fe2O3 decreased after the raw clay was treated with acid. The main mineral content in the sample is quartz, kaolinite, and hematite. The sample's morphology looks different after being given acid treatment; the acid leaching natural clay sample shows a porous morphology, while the natural clay without acid leaching shows the morphology in the form of lumps. The EDX mapping analysis showed that the number of impurities decreased after being given acid treatment.

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Chemical and physical characterization of a natural clay and its use as photocatalyst for the degradation of the methabenzthiazuron herbicide in water

Cited by 10 publications

References 37 publications

Titania containing natural clay doped with carbon nanotubes for enhanced natural photocatalytic discoloration of wastewater

Titania containing natural clay doped with carbon nanotubes for enhanced natural photocatalytic discoloration of wastewater

Microstructure Investigations of Natural Clay From Pattallassang District, Takalar Regency, South Sulawesi Province, Indonesia

Characterization of Natural Clay from Gowa Regency, South Sulawesi Province, Indonesia

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