Recent advances in photocatalysis on cement-based materials

Chen, Xiangyu; Qiao, Lige; Zhao, Rixu; Wu, Jianhao; Gao, Jingyang; Li, Lan; Chen, Jinchao; Wang, Wen; Galloni, Melissa Greta; Scesa, Federico M.; Chen, Zhi; Falletta, Ermelinda

doi:10.1016/j.jece.2023.109416

Cited by 14 publications

(4 citation statements)

References 86 publications

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“…In this way, an electron is prompted to move from the valence band (VB) to the conduction band (CB), generating an electronhole pair, producing and promoting redox reactions. [22,23] This process could be exploitable in countries where solar irradiation is abundant throughout the year.…”

Section: Introductionmentioning

confidence: 99%

An Innovative Sunlight‐Driven Device for Photocatalytic Drugs Degradation: from laboratory‐ to real‐Scale Application. A First Step Toward Vulnerable Communities

Galloni,

Falletta,

Mahdi

et al. 2024

Advanced Sustainable Systems

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Freshwater represents one of the most precious resources on the planet, so it is fundamental to preserve it. In this work, an innovative sunlight‐driven device composed of bismuth oxybromide (BiOBr) grown on a material derived from natural sources, i.e., Lightweight Expanded Clay Aggregates (LECA), is developed to clean surface waters under natural solar light irradiation. For this purpose, the photodegradation of two non‐steroidal anti‐inflammatory drugs, ibuprofen, and diclofenac, is investigated under varying operative conditions. Laboratory‐ and real‐scale experiments reveal that the fabricated floating BiOBr/LECA photocatalyst fully degrades diclofenac, whereas limited abatement of ibuprofen is observed. Based on the identification of specific transformation products (TPs) during the degradation, this behavior seems to be strongly related to the different structures of the two drugs. In fact, the main TP produced during diclofenac degradation derives from dechlorination and ring condensation: this type of photocatalytic degradation pathway is generally favored over the C─C bonds's cleavage, which is a unique possibility for IBU abatement. Moreover, the potential partial adsorption of these species on the photocatalyst's active sites can cause their deactivation. Finally, reusability tests demonstrate the high stability of the floating composite.

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Section: Introductionmentioning

confidence: 99%

An Innovative Sunlight‐Driven Device for Photocatalytic Drugs Degradation: from laboratory‐ to real‐Scale Application. A First Step Toward Vulnerable Communities

Galloni,

Falletta,

Mahdi

et al. 2024

Advanced Sustainable Systems

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“…13 These problems limit its further application in the field of photocatalysis. 9,14 Metal−organic frameworks (MOFs) are a class of porous crystalline materials with high porosity, large specific surface area, abundant active centers, and adjustable composition and structure, showing great potential in the field of semiconductor photocatalysis. 15−19 Among them, MIL-101(Fe) is synthesized by a self-assembly reaction of Fe precursor and benzene-1,4-dicarboxylic acid as an organic connector, with 2.3−2.7 nm average pore size.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, photocatalytic degradation of organic pollutants in water has received widespread attention due to its simplicity and environmental friendliness. , The key to this method is the preparation of effective photocatalysts. , Traditional semiconductor materials such as metal oxides (e.g., TiO 2 ), , sulfides (e.g., CdS), − and nitrides (e.g., C 3 N 4 ) , have been studied and applied as photocatalysts. The CdS, with appropriate valence band structure and high visible-light-induced activity, is a widely used photocatalyst for organic pollutant degradation .…”

Section: Introductionmentioning

confidence: 99%

“…To increase its surface area and active sites, CdS crystals with nanometer size can be prepared, which would require a carrier for dispersion to prevent agglomeration of CdS and rapid recombination of the electron–hole pairs in the photocatalytic process . These problems limit its further application in the field of photocatalysis. , Metal–organic frameworks (MOFs) are a class of porous crystalline materials with high porosity, large specific surface area, abundant active centers, and adjustable composition and structure, showing great potential in the field of semiconductor photocatalysis. − Among them, MIL-101(Fe) is synthesized by a self-assembly reaction of Fe precursor and benzene-1,4-dicarboxylic acid as an organic connector, with 2.3–2.7 nm average pore size . It has been identified as a visible light-responsive reductive photocatalyst with good catalytic performance for degrading organic pollutants. , However, due to its relatively large band gap width compared to semiconductor materials, its photoactivity is limited by low conductivity, easily recombined electron–hole pairs, and low energy conversion efficiency .…”

Section: Introductionmentioning

confidence: 99%

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CdS Nanoparticles Supported on a Dual Metal–Organic Framework as a Catalyst for the Photodegradation of Tetracycline

Jin,

Mi,

Qian

et al. 2024

ACS Appl. Nano Mater.

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The photocatalytic activity of individual metal− organic frameworks (MOFs) such as UiO-66-NH 2 and MIL-101(Fe) is less satisfactory due to the disappointing separation rate of electron−hole pairs and weak solar energy utilization efficiency. In this context, we develop hierarchical dual Z-scheme heterostructured photocatalysts prepared via an in situ hydrothermal synthesis method anchoring cadmium sulfide (CdS) nanoparticles onto the (UiO-66-NH 2 )-(MIL-101(Fe)) (UM) dual metal− organic frameworks. Attributed to the synergistic effects of CdS, UiO-66-NH 2 , and MIL-101(Fe), the (UiO-66-NH 2 )-(MIL-101)(Fe)-CdS (UM-CdS) exhibits outstanding degradation activities toward TC degradability. Typically, 10 mg of UM-CdS achieved an 87% degradation rate of TC within 140 min, which is 8.7, 2.4, and 1.4 times than those of UiO-66-NH 2 , MIL-101(Fe), and CdS, which achieved higher photocatalytic degradation rate with a less dosage of catalysts compared with previous reports. The outstanding photocatalytic activity of UM-CdS is primarily attributed to its hierarchical structure, which provides numerous active sites. Additionally, the special heterostructure not only exhibits a dual Z-scheme migration mechanism for charge carriers, which facilitates the efficient separation and migration of photoinduced electrons and holes, but also promotes the redox capability of UM-CdS. Furthermore, the trapping tests demonstrated that • O 2 − , • OH, and h + were the main active species during the photocatalytic process. The degradation products or intermediates were also studied in-depth through the liquid chromatography−mass spectrometry (LC-MS) technique. Besides, the UM-CdS possesses excellent stability, retaining more than 90% initial photocatalytic activity after the fifth cycle. This work provides a double MOF-supported CdS strategy to prepare recyclable dual Z-scheme heterojunction photocatalysts for the degradation of refractory antibiotics (e.g., TC) in sewage.

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Construction of Z‐scheme 1T/2H‐MoS₂/CdS for improving photocatalytic degradation of antibiotic residues

Liu,

Wu,

Wang

et al. 2024

Fuel Cells

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Abstract1T/2H‐MoS2/CdS composite was effectively prepared by a two‐step hydrothermal method, which greatly improved the photocatalytic degradation efficiency of tetracycline hydrochloride and photocatalytic cycle stability compared with pristine 1T/2H‐MoS2. The highest photodegradation efficiency of 70.8% is achieved when the molar ratio of 1T/2H‐MoS2 to cadmium sulfide is 1:4. The capture experiment indicates that hydroxyl radical (⋅OH) and superoxide radical (⋅O2−) play a role in the photocatalytic degradation process. A Z‐type heterojunction may be formed on the 1T/2H‐MoS2/CdS composite based on a series of analyses, which improves the photocatalytic performance effectively via expanding the range of light response and promoting the separation of photogenerated electrons and holes. This work provides an alternative to constructing novel Z‐scheme photocatalysts with high performance in the absence of noble metals.

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Recent advances in photocatalysis on cement-based materials

Cited by 14 publications

References 86 publications

An Innovative Sunlight‐Driven Device for Photocatalytic Drugs Degradation: from laboratory‐ to real‐Scale Application. A First Step Toward Vulnerable Communities

An Innovative Sunlight‐Driven Device for Photocatalytic Drugs Degradation: from laboratory‐ to real‐Scale Application. A First Step Toward Vulnerable Communities

CdS Nanoparticles Supported on a Dual Metal–Organic Framework as a Catalyst for the Photodegradation of Tetracycline

Construction of Z‐scheme 1T/2H‐MoS₂/CdS for improving photocatalytic degradation of antibiotic residues

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Recent advances in photocatalysis on cement-based materials

Cited by 14 publications

References 86 publications

An Innovative Sunlight‐Driven Device for Photocatalytic Drugs Degradation: from laboratory‐ to real‐Scale Application. A First Step Toward Vulnerable Communities

An Innovative Sunlight‐Driven Device for Photocatalytic Drugs Degradation: from laboratory‐ to real‐Scale Application. A First Step Toward Vulnerable Communities

CdS Nanoparticles Supported on a Dual Metal–Organic Framework as a Catalyst for the Photodegradation of Tetracycline

Construction of Z‐scheme 1T/2H‐MoS2/CdS for improving photocatalytic degradation of antibiotic residues

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Construction of Z‐scheme 1T/2H‐MoS₂/CdS for improving photocatalytic degradation of antibiotic residues