Photocatalytic kinetics of 2,4-dichloroaniline degradation by NiO-clinoptilolite nanoparticles

Iazdani, Fereshteh; Nezamzadeh‐Ejhieh, Alireza

doi:10.1016/j.saa.2020.119228

Cited by 12 publications

(7 citation statements)

References 65 publications

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“…Moreover, NiO, with an energy band gap of about 3.6-4 eV, can act as a promoter to produce OH radicals during the photocatalysis process. NiO/CP composite photocatalysts were prepared to degrade cefuroxime [85], cotrimoxazole [86], and 2,4-dichloroanilyne [87] under UV light. Similarly, NiS/CP photocatalysts were obtained by the same synthetic route and used to degrade furfural [88].…”

Section: Common Semiconductor/clinoptilolite Photocatalystsmentioning

confidence: 99%

Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water

Zhou,

Wang,

Shen

et al. 2024

Catalysts

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One of the most challenging problems for people around the world is the lack of clean water. In the past few decades, the massive discharge of emerging organic pollutants (EOPs) into natural water bodies has exacerbated this crisis. Considerable research efforts have been devoted to removing these EOPs due to their biotoxicity at low concentrations. Heterogeneous photocatalysis via coupling clay minerals with nanostructured semiconductors has proven to be an economical, efficient, and environmentally friendly technology for the elimination of EOPs in drinking water and watershed water. Natural zeolite minerals (especially clinoptilolites) are regarded as appropriate supports for semiconductor-based photocatalysts due to their characteristics of having a low cost, environmental friendliness, easy availability, co-catalysis, etc. This review summarizes the latest research on clinoptilolites used as supports to prepare binary and ternary metal oxide or sulfide semiconductor-based hybrid photocatalysts. Various preparation methods of the composite photocatalysts and their degradation efficiencies for the target contaminants are introduced. It is found that the good catalytic activity of the composite photocatalyst could be attributed to the synergistic effect of combining the clinoptilolite adsorbent with the semiconductor catalyst in the heterogeneous system, which could endow the composites with an excellent adsorption capacity and produce more e−/h+ pairs under suitable light irradiation. Finally, we highlight the serious threat of EOPs to the ecological environment and propose the current challenges and limitations, before putting the zeolite mineral composite photocatalysts into practice. The present work would provide a theoretical basis and scientific support for the application of zeolite-based photocatalysts for degrading EOPs.

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Section: Common Semiconductor/clinoptilolite Photocatalystsmentioning

confidence: 99%

Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water

Zhou,

Wang,

Shen

et al. 2024

Catalysts

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“…The crystallite size in our work is greater in comparison with a similar study [24]-175-180 nm vs 90-110 nm, which is due to a different degree of the zeolitization processes that have proceeded with time. Much lower values of the crystallite size are obtained by mechanical, thermal, and chemical pre-treatment of clinoptilolite-between 10 nm and 65 nm [35][36][37][38][39][40][41][42]. 2+ Cations in the Clinoptilolite Structure during Cadmium Exchange The designed initial model of the Cd-clinoptilolite structure was based on the data of Cappelletti et al [46] for natural clinoptilolite from volcanoclastites of North-Western Sardinia (monoclinic system, space group C2/m).…”

Section: Rietveld Structural Interpretation Of Natural and CD 2+ Exchanged Clinoptilolite With Time And Temperaturementioning

confidence: 99%

“…The crystallite size in our work is greater in comparison with a similar study [24]-175-180 nm vs. 90-110 nm, which is due to a different degree of the zeolitization processes that have proceeded with time. Much lower values of the crystallite size are obtained by mechanical, thermal, and chemical pre-treatment of clinoptilolite-between 10 nm and 65 nm [35][36][37][38][39][40][41][42].…”

Section: Movement Of H2o Molecules and CDmentioning

confidence: 99%

“…Mechanical tribo-and thermo-chemical treatment are the most often used methods to lower the size of the crystallites in the nanoscale range [35][36][37]. Iazdani and Nezamzadeh-Ejhieh [38,39] estimated, using the Scherrer equation, the average crystallite size of the pretreated via the ball-mill method clinoptilolite nanoparticles and FeO-and Ni-modified clinoptilolite samples. The value of the crystallite size obtained for the pretreated natural clinoptilolite is 56 nm.…”

Section: Introductionmentioning

confidence: 99%

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Powder XRD Study of Changes of Cd2+ Modified Clinoptilolite at Different Stages of the Ion Exchange Process

Dimowa

Tzvetanova

2021

Minerals

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Cadmium exchange on clinoptilolite is performed and structurally studied for different durations of the ion exchange process (2 h, 24 h, 72 h, 168 h, 12 days, 22 days) at room temperature and 90 °C. The distribution of Cd2+ ions in all samples is elucidated after exchange on clinoptilolite using powder XRD data processed by Rietveld structural software. Clinoptilolite is not selective for cadmium cations, but at 90 °C the exchange is ~2.5 cations per unit cell. At RT it reaches ~1.25 cations per unit cell being twice as low. The obtained maximum exchanged sample for 22 days 90 °C was structurally refined in order to find the cadmium positions in the clinoptilolite voids. The structural refinements of the occupations of the incoming and outgoing cations give an idea of how the intracrystalline diffusion is processed. A good correlation between results obtained by structural refinement of the Cd-exchanged samples and the data of the EDS measurements was achieved.

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“…In contrast, cupric oxide (CuO) has a bandgap energy ranging between 1.2–2.0 eV, with conduction band (CB) and valence band (VB) potential positions at 0.46 eV and 2.16 eV, respectively. These values are conductive to the production of hydroxyl ( − OH) and superoxide radicals (O 2 ⋅ − ), which are essential reactive species in photodegradation [26] …”

Section: Introductionmentioning

confidence: 99%

Evaluation of Catalytic Conditions for Dye Discoloration Using Nano‐TiO₂ Films: A Fractional Factorial Design Approach

Naranjo‐Castañeda,

García‐Rocha,

Gallardo‐Hernández

et al. 2024

ChemistrySelect

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In this research, selected catalytic activity conditions of nano Cu‐TiO2 films were evaluated through a 2IV4−1 Fractional Factorial Design for methylene blue discoloration. The following conditions were set at two levels: dye concentration (mg/L) (A) at 3.13 and 5.81; aeration (psi) (B) with and without; radiation (nm) (C) at 320 (UV) and 470 (Visible); and nano‐TiO2 films (D) without and with Cu‐doping. Films were prepared by the Sol‐Gel dip‐coating method and characterized using X‐ray diffraction, revealing an anatase phase in TiO2; and anatase, rutile, and brookite crystalline phases in Cu‐doped nano‐TiO2, with average band gap energies of 3.82 and 3.77 eV. The catalytic activity of films was significantly affected (p<0.05) by aeration (0.0002), radiation (0.001), and Cu‐doped nano‐TiO2 (0.004). Dye concentration did not have a significant effect; however, the AC interaction was significant (p=0.015). A discoloration efficiency of 46.23 % was obtained with 5.81 mg/L dye concentration using Cu‐doped TiO2, with UV radiation and without aeration, whereas a 52.32 % efficiency was achieved with 3.13 mg/L dye concentration using non Cu‐doped TiO2. Using factorial designs allows us to identify the main variables and their interactions to determine the optimal conditions for the catalytic activity of nano‐TiO2.

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Photocatalytic kinetics of 2,4-dichloroaniline degradation by NiO-clinoptilolite nanoparticles

Cited by 12 publications

References 65 publications

Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water

Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water

Powder XRD Study of Changes of Cd2+ Modified Clinoptilolite at Different Stages of the Ion Exchange Process

Evaluation of Catalytic Conditions for Dye Discoloration Using Nano‐TiO₂ Films: A Fractional Factorial Design Approach

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Photocatalytic kinetics of 2,4-dichloroaniline degradation by NiO-clinoptilolite nanoparticles

Cited by 12 publications

References 65 publications

Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water

Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water

Powder XRD Study of Changes of Cd2+ Modified Clinoptilolite at Different Stages of the Ion Exchange Process

Evaluation of Catalytic Conditions for Dye Discoloration Using Nano‐TiO2 Films: A Fractional Factorial Design Approach

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Evaluation of Catalytic Conditions for Dye Discoloration Using Nano‐TiO₂ Films: A Fractional Factorial Design Approach