Experimental and theoretical investigation of enhancing the photocatalytic activity of Mg doped ZnO for nitrophenol degradation

Tanji, Karim; Mrabet, Imane El; Fahoul, Youssef; Soussi, A.; Belghiti, Mohamed Alaoui El; Jellal, Ilyass; Naciri, Yassine; Gaidoumi, Abdelali El; Kherbeche, Abdelhak

doi:10.1007/s11144-023-02385-0

Cited by 27 publications

(3 citation statements)

References 52 publications

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“…This probably happens due to the catalytic activity of the ZnO on the degradation process. Similar behavior was reported in papers for coal combustion pro-cesses with Fe 2 O 3 , CeO 2 , and CaO [38][39][40] and for enhanced photodegradation processes using ZnO nanoparticles [41][42][43].…”

Section: Thermogravimetric Tg% Analysis Of Pure Ac and Zno@ac Compositessupporting

confidence: 86%

Hydrogen Sulfide Removal via Sorption Process on Activated Carbon–Metal Oxide Composites Derived from Different Biomass Sources

Baikousi,

Gantzoudi,

Gioti

et al. 2023

Molecules

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Biomass exploitation is a global trend due to the circular economy and the environmentally friendly spirit. Numerous applications are now based on the use of biomass-derived products. Hydrogen sulfide (H2S) is a highly toxic and environmentally hazardous gas which is emitted from various processes. Thus, the efficient removal of this toxic hazardous gas following cost-effective processes is an essential requirement. In this study, we present the synthesis and characterization of biomass-derived activated carbon/zinc oxide (ZnO@AC) composites from different biomass sources as potential candidates for H2S sorption. The synthesis involved a facile method for activated carbon production via pyrolysis and chemical activation of biomass precursors (spent coffee, Aloe-Vera waste leaves, and corncob). Activated carbon production was followed by the incorporation of zinc oxide nanoparticles into the porous carbon matrix using a simple melt impregnation method. The synthesized ZnO@AC composites were characterized using X-ray diffraction (XRD), infrared spectroscopy (IR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and nitrogen porosimetry. The H2S removal performance of the ZnO@AC composites was evaluated through sorption experiments using a handmade apparatus. Our findings demonstrate that the Aloe-Vera-, spent coffee-, and corncob-derived composites exhibit superior H2S sorption capacity up to 106 mgH2S/gads., 66 mgH2S/gads., and 47 mgH2S/gads., respectively.

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Section: Thermogravimetric Tg% Analysis Of Pure Ac and Zno@ac Compositessupporting

confidence: 86%

Hydrogen Sulfide Removal via Sorption Process on Activated Carbon–Metal Oxide Composites Derived from Different Biomass Sources

Baikousi,

Gantzoudi,

Gioti

et al. 2023

Molecules

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“…Modification of photocatalysts with metals, including transition metals, , rare earth metals, , noble metals, , semimetals, and alkaline earth metals, , improves organic pollutant treatment. Generally, doping of metals is carried out by reducing and precipitating ion metals into the ZnO and/or TiO 2 nanoparticle suspensions in the presence of a reduction agent.…”

Section: Photocatalystsmentioning

confidence: 99%

A Review of Synthesis Methods, Modifications, and Mechanisms of ZnO/TiO₂-Based Photocatalysts for Photodegradation of Contaminants

Ghamarpoor,

Fallah,

Jamshidi

2024

ACS Omega

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The environment being surrounded by accumulated durable waste organic compounds has become a critical crisis for human societies. Generally, organic effluents of industrial plants released into the water source and air are removed by some physical and chemical processes. Utilizing photocatalysts as cost-effective, accessible, thermally/ mechanically stable, nontoxic, reusable, and powerful UV-absorber compounds creates a new gateway toward the removal of dissolved, suspended, and gaseous pollutants even in trace amounts. TiO 2 and ZnO are two prevalent photocatalysts in the field of removing contaminants from wastewater and air. Structural modification of the photocatalysts with metals, nonmetals, metal ions, and other semiconductors reduces the band gap energy and agglomeration and increases the affinity toward organic compounds in the composite structures to expand their usability on an industrial scale. This increases the extent of light absorbance and improves the photocatalytic efficiency. Selecting a suitable synthesis method is necessary to prepare a target photocatalyst with distinct properties such as high specific surface area, numerous surface functional groups, and an appropriate crystalline phase. In this Review, significant parameters for the synthesis and modification of TiO 2 -and ZnO-based photocatalysts are discussed in detail. Several proposed mechanistic routes according to photocatalytic composite structures are provided. Some electrochemical analyses using charge carrier trapping agents and delayed recombination help to plot mechanistic routes according to the direction of photoexcited species (electron−hole pairs) and design more effective photocatalytic processes in terms of cost-effective photocatalysts, saving time and increasing productivity.

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“…Moreover, the rapid recombination rate of electron hole pairs produced by light decreases their rate of degradation. In order to improve the photocatalytic efficiency of ZnO, co-catalysts are one of the most effective methods, such as metal deposition [ 18 , 19 ], heterojunction construction [ 20 ], and co-catalysts [ 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Activity of V2C MXene-Coupled ZnO Porous Nanosheets with Increased Surface Area and Effective Charge Transfer

Zhou,

Sun,

et al. 2024

Materials

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Photocatalysis performs excellently when degrading organic pollutants, but the photocatalytic degradation rate is not high for most photocatalysts due to their narrow sunlight adsorption range and high recombination rate of electron hole pairs. Herein, we use V2C-MXene with a wide sunlight adsorption range to couple ZnO porous nanosheets and form ZnO/MXene hybrids using a facile electrostatic self-assembly method. The ZnO/MXene hybrids acquired demonstrated improved photochemical efficiency in breaking down methylene blue (MB) when contrasted with porous ZnO nanosheets. The degradation rate of MB reached 99.8% under UV irradiation for 120 min after the ZnO/MXene hybrid formation, while 38.6% was attained by the ZnO porous nanosheets. Moreover, photodegradation rate constants (k) were calculated as 3.05 × 10−3 and 5.42 × 10−2 min−1 for ZnO porous nanosheets and ZnO/MXene hybrids, respectively, indicating that the photodegradation performance was enhanced by 17.8 times after the modification of V2C. This was probably because the modification of V2C can increase the specific surface area to provide more sites for MB adsorption, widen the sunlight adsorption range to produce good photothermal effect, and facilitate the transfer of photogenerated carriers in ZnO to promote the reaction of more photogenerated carriers with MB. Hence, this work offers a simple approach to creating effective photocatalysts for breaking down organic contaminants.

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Experimental and theoretical investigation of enhancing the photocatalytic activity of Mg doped ZnO for nitrophenol degradation

Cited by 27 publications

References 52 publications

Hydrogen Sulfide Removal via Sorption Process on Activated Carbon–Metal Oxide Composites Derived from Different Biomass Sources

Hydrogen Sulfide Removal via Sorption Process on Activated Carbon–Metal Oxide Composites Derived from Different Biomass Sources

A Review of Synthesis Methods, Modifications, and Mechanisms of ZnO/TiO₂-Based Photocatalysts for Photodegradation of Contaminants

Enhanced Photocatalytic Activity of V2C MXene-Coupled ZnO Porous Nanosheets with Increased Surface Area and Effective Charge Transfer

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Experimental and theoretical investigation of enhancing the photocatalytic activity of Mg doped ZnO for nitrophenol degradation

Cited by 27 publications

References 52 publications

Hydrogen Sulfide Removal via Sorption Process on Activated Carbon–Metal Oxide Composites Derived from Different Biomass Sources

Hydrogen Sulfide Removal via Sorption Process on Activated Carbon–Metal Oxide Composites Derived from Different Biomass Sources

A Review of Synthesis Methods, Modifications, and Mechanisms of ZnO/TiO2-Based Photocatalysts for Photodegradation of Contaminants

Enhanced Photocatalytic Activity of V2C MXene-Coupled ZnO Porous Nanosheets with Increased Surface Area and Effective Charge Transfer

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Product

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A Review of Synthesis Methods, Modifications, and Mechanisms of ZnO/TiO₂-Based Photocatalysts for Photodegradation of Contaminants