High efficient photocatalytic activity of Zn-Al-Ti layered double hydroxides nanocomposite

Amor, F.; Diouri, A.; Ellouzi, Imane; Ouanji, Fatiha; Kacimi, Mohammed

doi:10.1051/matecconf/201814901087

Cited by 13 publications

(8 citation statements)

References 16 publications

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“…The coprecipitation method using sodium hydroxide precipitate was carried out in the preparation of ZnNi/Al (Qi et al, 2018) and ZnCo/Al (Li et al, 2018) as a catalyst for rhodamine-B degradation, while ZnCu/Al-TiO 2 (Seftel et al, 2015) in phenol degradation. The studies of coprecipitation technique that used calcination temperatures include the preparation of Zn/AlGa calcined 500 • C (Amor et al, 2018) , Zn/Al LDH calcined 500 • C and 900 • C (Abderrazek et al, 2016) , Zn/Al-TiO 2 calcined 500 • C (Hadnadjev-Kostic et al, 2017) , Zn/Al LDH calcined 800 • C (Huo et al, 2013) which were respectively used during the degradation of methylene blue, preparation of Zn/AlCe calcined 450-900 • C (Zhu et al, 2016) and Zn/Al-TiO 2 calcined 500 • C (Rudic et al, 2014) as catalysts in the degradation of rhodamine-B and the preparation of Zn/AlGa calcined at 550 • C used for phenol degradation (Prince et al, 2015) . From the studies of LDH-based composites that have been carried out, it appears that not a few have prepared LDHtype metal oxides LDH-TiO 2 and LDH-ZnO as photocatalysts for organic pollutant degradation.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Congo Red Photodegradation Performance Through Zn/Al-TiO2 and Zn/Al-ZnO Preparation

Yuliasari

Amri²,

Mohadi

et al. 2022

Sci. Technol. Indones

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Layered double hydroxide (LDH) is an anionic clay material known to be effective as a catalyst for the photodegradation of dye organic pollutants. Zn/Al LDH was synthesized by coprecipitation then impregnated with metal oxides and calcined at 300oC to form Zn/Al-TiO2 and Zn/Al-ZnO as photodegradation catalysts of congo red (CR). The characterization of the catalysts after preparation using SEM and UV-DRS while the catalyst that have been used in 5 regeneration cycles was characterized by XRD and FTIR. Photodegradation of CR was carried out by optimizing pH, catalyst weight, and time radiation. Zn/Al LDH which was modified into Zn/Al-TiO2 and ZnAl-ZnO had a better degradation percentage, rate constant, and stability than Zn/Al LDH pristine structure. Zn/Al LDH, Zn/Al TiO2 and Zn/Al-ZnO catalyzed CR photodegradation for 120 minutes with percent degradation 68.39%, 81.24% and 71.09%, respectively.

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Section: Introductionmentioning

confidence: 99%

Improvement of Congo Red Photodegradation Performance Through Zn/Al-TiO2 and Zn/Al-ZnO Preparation

Yuliasari

Amri²,

Mohadi

et al. 2022

Sci. Technol. Indones

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“…ZnAl hydrotalcite materials have been of significant interest to researchers and scientists. The precursors used to synthesize these materials are also highly diverse, ranging from nitrate, chloride and sulfate salts with molar ratios of Zn 2+ /Al 3+ of 2:1; 3:1 and 4:1, respectively [1][2][3][4][5]. The XRD analysis results show that the Zn 2+ /Al 3+ molar ratios of approximately 2:1 and 1.5:1 were the most suitable for the structure of LDHs [1] and CuZnAl material [2].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Degradation of Rhodamine-B under Led Light Using CuZnAl Hydrotalcite Synthesized by Co-Precipitation Technique

Pham

Chanthavong

et al. 2022

Inorganics

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The co-precipitation method was employed to synthesize a set of ZnAl hydrotalcite materials modified by Cu2+. The synthesized materials have a similar lamellar structure to that of hydrotalcite. The distance between layers is in the range of 7.73–8.56 Å. The network parameters a and c ranged from 3.058 to 3.074 Å and from 23.01 to 24.44, respectively. According to the IUPAC classification, the composites possess a mesoporous structure which belongs to class IV, type H 3. Particularly, the absorption edge shifts strongly to the visible light region when increasing the molar ratio of Cu2+ in the samples from 0 to 3.5. The photocatalytic activity of the synthetic materials was evaluated through the degradation efficiency of rhodamine-B (Rh-B) in the water and colorants in textile wastewater. The present study was the first to synthesize a material sample that contains a molar ratio of Cu2+ in the range of 2.5–3.5 and has high catalytic activities. They were able to degrade Rh-B at a high concentration (100 ppm) with a conversion rate of approximately 90% after 240 min of irradiation using a 30 W LED light. The catalytic activity of the composites depends on the molar ratio of modified Cu2+, the value of environmental pH, the H2O2 concentration and the irradiation time.

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“…This role has a potentially enhanced effectivity in the photocatalytic mechanism. Zn-Al LDHs were reported to have high effectivity in the degradation of methylene blue and rhodamine B and some other organic compounds [ 5 , 6 , 7 ]. Based on the contribution of the ionic adsorption mechanism in the photocatalytic process, it can be hypothesized that Zn-Al LDHs have the capability to be utilized in peat water treatment; in addition, the use for peat water treatment was not reported yet.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Activity of Zn-Al Layered Double Hydroxides for Methyl Violet and Peat Water Photooxidation

et al. 2022

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Zn-Al Layered Double Hydroxides (Zn-Al LDHs) and its calcined form were successfully prepared and utilized for the removal of methyl violet (MV) and treatment of peat water by photocatalytic oxidation. The research was aimed to evaluate the effect of calcination to Zn-Al LDHs for the effect on the physicochemical character and the capability as a photocatalyst. The characterization of the samples was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer–Emmet–Teller specific surface area (BET), and X-ray photoelectron spectroscopy (XPS). The results showed that the increased BET specific surface area along with the enhanced porous structure was achieved by the calcination procedure, which is associated with the enhanced interlayer space of d003 identified by XRD analysis. Thermal conversion showed an influence to the increased band gap energy from 3.10 eV in the uncalcined Zn-Al LDHs into 3.16 eV for the calcined material. These character changes contributed to the enhanced photocatalytic activity of the Zn-AL LDHs by calcination, which was proposed and verified by experiments. It was observed that photocatalytic activity of the material for MV gave about a 45.57% removal of MV and a 68% removal for the natural organic material of the peat water.

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High efficient photocatalytic activity of Zn-Al-Ti layered double hydroxides nanocomposite

Cited by 13 publications

References 16 publications

Improvement of Congo Red Photodegradation Performance Through Zn/Al-TiO2 and Zn/Al-ZnO Preparation

Improvement of Congo Red Photodegradation Performance Through Zn/Al-TiO2 and Zn/Al-ZnO Preparation

Enhanced Photocatalytic Degradation of Rhodamine-B under Led Light Using CuZnAl Hydrotalcite Synthesized by Co-Precipitation Technique

Enhanced Photocatalytic Activity of Zn-Al Layered Double Hydroxides for Methyl Violet and Peat Water Photooxidation

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