Ag modified ZnS for photocatalytic water pollutants degradation: Influence of metal loading and preparation method

Sacco, Olga; Vaiano, Vincenzo; Sannino, Diana; Picca, Rosaria Anna; Cioffi, Nicola

doi:10.1016/j.jcis.2018.11.073

Cited by 48 publications

(16 citation statements)

References 70 publications

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“…Figure 8 shows that the photocatalytic degradation rates remain constant for the range of concentrations investigated. This behavior differs from the results previously reported in literature, showing that photocatalytic degradation rate decreases with the increasing initial pollutant concentration [27,28]. Some authors [28,29] suggested that the observed worsening of photocatalytic activity was due to the competition for the adsorption sites on the photocatalyst surface between the target pollutant and the reaction by-products which increase by increasing the pollutant concentration [29].…”

Section: Resultscontrasting

confidence: 75%

Highly Robust and Selective System for Water Pollutants Removal: How to Transform a Traditional Photocatalyst into a Highly Robust and Selective System for Water Pollutants Removal

et al. 2019

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Highly porous monolithic aerogels based on ZnO photocatalyst and syndiotactic polystyrene (s-PS) were obtained by supercritical CO2 treatment of ZnO/s-PS gels. The prepared aerogels were characterized and their photocatalytic activity was evaluated using phenol and toluene as water pollutant models. The s-PS nanoporous crystalline phase, able to absorb pollutant molecules, was proven to be necessary to ensure high photocatalytic efficiency as the aerogel acts not only as a support, but also as pollutant pre-concentrator. The reusability of ZnO/s-PS aerogels is also strong showing no decrease in photocatalytic activity after six consecutive degradation trials. Finally, the aerogel matrix prevents ZnO dissolution occurring under acidic conditions and promotes a selective removal of the pollutants. The synergy between the photocatalyst and the innovative polymeric support provides the composite system with robustness, chemical stability, easy recovery after treatment, high efficiency of pollutant removal with a marked selectivity which make these materials promising for large scale applications.

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Section: Resultscontrasting

confidence: 75%

Highly Robust and Selective System for Water Pollutants Removal: How to Transform a Traditional Photocatalyst into a Highly Robust and Selective System for Water Pollutants Removal

et al. 2019

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“…Moreover, one of the most notable merit of metal sulfides is their relatively smaller bandgaps, which make sure that many of them can directly utilize visible light . Especially in recent years, the metal sulfide based photocatalysts (CuS, ZnS, CdS et al) have been extensively used in wastewater treatment field because of its greater light absorption range and excellent photocatalytic performance …”

Section: Introductionmentioning

confidence: 99%

One‐Step Transformation from Cu₂S Nanocrystal to CuS Nanocrystal with Photocatalytic Properties

et al. 2019

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Herein, we have realized the transformation from Cu 2 S to CuS phase by a facile secondary vulcanization. The CuS completely inherited the special morphology of the precursor nanocrystal, and the feature excludes the structural and dimensional influence in the study of the effects of Cu(I) and Cu(II) on photocatalytic properties. Under visible light irradiation, the photocatalytic performances of Cu 2 S@CT (CT, biomass carbon tube) and CuS@CT composites were examined on organic dye (methylene blue, MB) degradation and Cr (VI) reduction at different original solution pH. Both photocatalysts exhibit good photocatalytic activity under favourable conditions, which should be attributed to the high specific surface area and luxuriant active sites of the materials with special nanostructures. Moreover, the Cu 2 S@CT and CuS@CT show distinctdifferent oxidability and reducibility due to the compositional difference, Cu 2 S@CT composites have better reduction properties of Cr(VI) at pH = 2, while the CuS@CT composites exhibit better degradation activity of MB at pH = 10.

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“…Moreover, this method does not transfer the pollutant from one phase to another, as in the case of certain conventional treatment techniques (such as adsorption), but rather eliminates the target compound [8,9]. Usually, semiconductors including TiO 2 , WO 3 , ZnO, CdS and ZnS are selected as photocatalysts due to their electronic structure involving narrow band gaps [10][11][12][13][14][15][16][17][18]. Among the different semiconductors, TiO 2 is almost the only material suitable for industrial use at present and also probably in the future.…”

Section: Why N-doped Tio2 For Heterogeneous Photocatalysis?mentioning

confidence: 99%

Catalytic Composite Systems Based on N-Doped TiO2/Polymeric Materials for Visible-Light-Driven Pollutant Degradation: A Mini Review

et al. 2021

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This mini review summarizes the preparation and testing of polymeric composites with a N-doped TiO2 photocatalyst to effectively design a photocatalytic system for water pollutant degradation under visible light. In detail, the various N-doped TiO2/polymer composites reported in the literature are briefly discussed along with some examples dealing with the use of N-doped TiO2 particles, both supported on the external surface of polymers and dispersed within the structure of visible-light-transparent polymeric aerogels. Finally, the scope for future works and challenges for the commercialization of such materials are highlighted.

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Ag modified ZnS for photocatalytic water pollutants degradation: Influence of metal loading and preparation method

Cited by 48 publications

References 70 publications

Highly Robust and Selective System for Water Pollutants Removal: How to Transform a Traditional Photocatalyst into a Highly Robust and Selective System for Water Pollutants Removal

Highly Robust and Selective System for Water Pollutants Removal: How to Transform a Traditional Photocatalyst into a Highly Robust and Selective System for Water Pollutants Removal

One‐Step Transformation from Cu₂S Nanocrystal to CuS Nanocrystal with Photocatalytic Properties

Catalytic Composite Systems Based on N-Doped TiO2/Polymeric Materials for Visible-Light-Driven Pollutant Degradation: A Mini Review

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Ag modified ZnS for photocatalytic water pollutants degradation: Influence of metal loading and preparation method

Cited by 48 publications

References 70 publications

Highly Robust and Selective System for Water Pollutants Removal: How to Transform a Traditional Photocatalyst into a Highly Robust and Selective System for Water Pollutants Removal

Highly Robust and Selective System for Water Pollutants Removal: How to Transform a Traditional Photocatalyst into a Highly Robust and Selective System for Water Pollutants Removal

One‐Step Transformation from Cu2S Nanocrystal to CuS Nanocrystal with Photocatalytic Properties

Catalytic Composite Systems Based on N-Doped TiO2/Polymeric Materials for Visible-Light-Driven Pollutant Degradation: A Mini Review

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One‐Step Transformation from Cu₂S Nanocrystal to CuS Nanocrystal with Photocatalytic Properties