ZnO/Mg-Al Layered Double Hydroxides as a Photocatalytic Bleaching of Methylene Orange - A Black Box Modeling by Artificial Neural Network

Hosseini, Seyed Abolfazl; Akbari, Mansor

doi:10.9767/bcrec.11.3.570.299-315

Cited by 5 publications

(2 citation statements)

References 47 publications

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“…The good photocatalytic activity of LDH is able to efficiently degrade organic dyes [4]. LDH synthesis is relatively simple and economical both in a laboratory scale and even in an industrial scale [5].…”

Section: Introductionmentioning

confidence: 99%

Modification of pristine layered double hydroxide to form metal oxide composites as an anionic dye photodegradation catalysts

Yuliasari

Amri

Mohadi

et al. 2022

CST

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Pristine layered double hydroxide (LDH) in the form of clay Mg/Al LDH was enhanced its catalytic ability by impregnating metal oxides to form Mg/Al-metal oxide composites in congo red (CR) degradation. The composite was calcined at a not high temperature of 300 oC and characterized using SEM and DRUV. In this report, the photodegradation of CR as anionic dye was optimized based on the variables of pH, catalyst weight and time radiation. The stability of the catalyst was studied from the percent degradation in the recycling test. The characterization of the catalyst that has undergone 5th regeneration cycles was carried out using XRD and FTIR. The results of this study revealed that catalysis by Mg/Al-metal oxide composites resulted in a better percent degradation, rate constant and materials stability than pristine Mg/Al LDH. Mg/Al LDH, Mg/Al-TiO2 and Mg/Al-ZnO catalyzed the photodegradation of CR by 65.97%, 73.06 % and 86.86%, respectively.

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Section: Introductionmentioning

confidence: 99%

Modification of pristine layered double hydroxide to form metal oxide composites as an anionic dye photodegradation catalysts

Yuliasari

Amri

Mohadi

et al. 2022

CST

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“…TiO 2 @CoAl-CO 3 and ZnO@CuAl-CO 3 core-shell materials have been shown to exhibit water splitting capabilities for H 2 production [ 25 , 26 , 27 , 28 ]. Likewise, ZnO/MgAl-CO 3 composites have been used for the photodegradation of dyes such as Malachite Green and Methylene Orange [ 29 , 30 ]. By altering the LDH in composites from MgAl-CO 3 to ZnCr-CO 3 type, magnetic core-shell composites have also been applied to adsorption and photocatalysis of methylene blue [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

Towards the Continuous Hydrothermal Synthesis of ZnO@Mg2Al-CO3 Core-Shell Composite Nanomaterials

et al. 2020

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Core-shell Zinc Oxide/Layered Double Hydroxide (ZnO@LDH) composite nanomaterials have been produced by a one-step continuous hydrothermal synthesis process, in an attempt to further enhance the application potential of layered double hydroxide (LDH) nanomaterials. The synthesis involves two hydrothermal reactors in series with the first producing a ZnO core and the second producing the Mg2Al-CO3 shell. Crystal domain length of single phase ZnO and composite ZnO was 25 nm and 42 nm, respectively. The ZnO@LDH composite had a specific surface area of 76 m2 g−1, which was larger than ZnO or Mg2Al-CO3 when produced separately (53 m2 g−1 and 58 m2 g−1, respectively). The increased specific surface area is attributed to the structural arrangement of the Mg2Al-CO3 in the composite. Platelets are envisaged to nucleate on the core and grow outwards, thus reducing the face–face stacking that occurs in conventional Mg2Al-CO3 synthesis. The Mg/Al ratio in the single phase LDH was close to the theoretical ratio of 2, but the Mg/Al ratio in the composite was 1.27 due to the formation of Zn2Al-CO3 LDH from residual Zn2+ ions. NaOH concentration was also found to influence Mg/Al ratio, with lower NaOH resulting in a lower Mg/Al ratio. NaOH concentration also affected morphology and specific surface area, with reduced NaOH content in the second reaction stage causing a dramatic increase in specific surface area (> 250 m2 g−1). The formation of a core-shell composite material was achieved through continuous synthesis; however, the final product was not entirely ZnO@Mg2Al-CO3. The product contained a mixture of ZnO, Mg2Al-CO3, Zn2Al-CO3, and the composite material. Whilst further optimisation is required in order to remove other crystalline impurities from the synthesis, this research acts as a stepping stone towards the formation of composite materials via a one-step continuous synthesis.

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Tailoring amount of TiO₂ doped onto fibrous silica ZSM-5 for enhanced photodegradation of paracetamol

Aziz

Jalil

Hitam

et al. 2020

IOP Conf. Ser.: Mater. Sci. Eng.

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Photocatalytic degradation of paracetamol has received much attention due to its low energy consumption, high efficiency and safety to environment. A simple electrolysis system was used to synthesis a series of titania (1-5 wt%) supported on fibrous silica ZSM-5 (TiO2/FZ). The FESEM images showed the cockscomb-like surface of FZ was preserved even after the addition of TiO2. FTIR results confirmed that TiO2 is successfully incorporated with FZ through the Si-O-Ti bonds. The adsorption edge of TiO2 shifted to the higher wavelength after supported on FZ and lowering the band gap of TiO2. The photodegradation of paracetamol was resulted in the following order: 3 wt% TiO2/FZ (90%) > 5 wt% TiO2/FZ (71%) > 1 wt% TiO2/FZ (65%). 3 wt% TiO2/FZ exhibits excellent photodegradation of paracetamol owing to the highest number of Si-O-Ti bonds and lowest band gap. The result obtained give new insight for other wastewater treatment processes over photodegradation of various pollutants.

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ZnO/Mg-Al Layered Double Hydroxides as a Photocatalytic Bleaching of Methylene Orange - A Black Box Modeling by Artificial Neural Network

Cited by 5 publications

References 47 publications

Modification of pristine layered double hydroxide to form metal oxide composites as an anionic dye photodegradation catalysts

Modification of pristine layered double hydroxide to form metal oxide composites as an anionic dye photodegradation catalysts

Towards the Continuous Hydrothermal Synthesis of ZnO@Mg2Al-CO3 Core-Shell Composite Nanomaterials

Tailoring amount of TiO₂ doped onto fibrous silica ZSM-5 for enhanced photodegradation of paracetamol

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ZnO/Mg-Al Layered Double Hydroxides as a Photocatalytic Bleaching of Methylene Orange - A Black Box Modeling by Artificial Neural Network

Cited by 5 publications

References 47 publications

Modification of pristine layered double hydroxide to form metal oxide composites as an anionic dye photodegradation catalysts

Modification of pristine layered double hydroxide to form metal oxide composites as an anionic dye photodegradation catalysts

Towards the Continuous Hydrothermal Synthesis of ZnO@Mg2Al-CO3 Core-Shell Composite Nanomaterials

Tailoring amount of TiO2 doped onto fibrous silica ZSM-5 for enhanced photodegradation of paracetamol

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Tailoring amount of TiO₂ doped onto fibrous silica ZSM-5 for enhanced photodegradation of paracetamol