A review of clay based photocatalysts: Role of phyllosilicate mineral in interfacial assembly, microstructure control and performance regulation

Li, Chunquan; Zhu, Ningyuan; Yang, Shanshan; He, Xuwen; Zheng, Shuilin; Sun, Zhiming; Dionysiou, Dionysios D.

doi:10.1016/j.chemosphere.2021.129723

Cited by 67 publications

(20 citation statements)

References 163 publications

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“…Therefore, modification and improvement of the bare catalysts are of high interest in water treatment research. In recent years, several studies have demonstrated the applicability of using various clay-based materials as improved photocatalysts that provide efficient and stable reactions [44,[47][48][49][50]. Furthermore, irradiation of UVC light with a combination of a homogeneous catalyst as hydrogen-peroxide and clay-based heterogeneous catalysts may deliver an effective advanced oxidation process, as was recently shown for BPS [51].…”

Section: Introductionmentioning

confidence: 93%

“…The most common heterogeneous photocatalysts for CBZ photodegradation are catalytic grade oxides such as TiO 2 , ZnO, and MoS 2 [27,42,43]. The main disadvantages of using such conventional catalysts are the difficulties with separation of the particles and their reuse, weak stability, and low quantum efficiency [44][45][46]. Therefore, modification and improvement of the bare catalysts are of high interest in water treatment research.…”

Section: Introductionmentioning

confidence: 99%

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Carbamazepine Removal by Clay-Based Materials Using Adsorption and Photodegradation

Levakov

Shahar

Rytwo

2022

Water

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Carbamazepine (CBZ) is one of the most common emerging contaminants released to the aquatic environment through domestic and pharmaceutical wastewater. Due to its high persistence through conventional degradation treatments, CBZ is considered a typical indicator for anthropogenic activities. This study tested the removal of CBZ through two different clay-based purification techniques: adsorption of relatively large concentrations (20–500 μmol L−1) and photocatalysis of lower concentrations (<20 μmol L−1). The sorption mechanism was examined by FTIR measurements, exchangeable cations released, and colloidal charge of the adsorbing clay materials. Photocatalysis was performed in batch experiments under various conditions. Despite the neutral charge of carbamazepine, the highest adsorption was observed on negatively charged montmorillonite-based clays. Desorption tests indicate that adsorbed CBZ is not released by washing. The adsorption/desorption processes were confirmed by ATR-FTIR analysis of the clay-CBZ particles. A combination of synthetic montmorillonite or hectorite with low H2O2 concentrations under UVC irradiation exhibits efficient homo-heterogeneous photodegradation at μM CBZ levels. The two techniques presented in this study suggest solutions for both industrial and municipal wastewater, possibly enabling water reuse.

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Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Carbamazepine Removal by Clay-Based Materials Using Adsorption and Photodegradation

Levakov

Shahar

Rytwo

2022

Water

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“…Parallel to the discovery of petroleum, various types of materials were also discovered and applied in crude oil production, consumption, and treatment to reduce or eliminate the associated environmental pollution. Firstly, bulky materials containing common elements, such as aluminum [27] and silicon [28], and naturally occurring materials, such as clays and zeolites, were used [29,30]. Since 1998, a new era of nanotechnology and nanomaterials has flourished.…”

Section: The Contribution Of Nanomaterials In Energy and Environmenta...mentioning

confidence: 99%

Recent Breakthrough in Layered Double Hydroxides and Their Applications in Petroleum, Green Energy, and Environmental Remediation

et al. 2022

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The fast development of the world civilization is continuously based on huge energy consumption. The extra-consumption of fossil fuel (petroleum, coal, and gas) in past decades has caused several political and environmental crises. Accordingly, the world, and especially the scientific community, should discover alternative energy sources to safe-guard our future from severe climate changes. Hydrogen is the ideal energy carrier, where nanomaterials, like layered double hydroxides (LDHs), play a great role in hydrogen production from clean/renewable sources. Here, we review the applications of LDHs in petroleum for the first time, as well as the recent breakthrough in the synthesis of 1D-LDHs and their applications in water splitting to H2. By 1D-LDHs, it is possible to overcome the drawbacks of commercial TiO2, such as its wide bandgap energy (3.2 eV) and working only in the UV-region. Now, we can use TiO2-modified structures for infrared (IR)-induced water splitting to hydrogen. Extending the performance of TiO2 into the IR-region, which includes 53% of sunlight by 1D-LDHs, guarantees high hydrogen evolution rates during the day and night and in cloudy conditions. This is a breakthrough for global hydrogen production and environmental remediation.

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“…The coating of activated carbon with TiO2 has widely been suggested to overcome some limitations of adsorption and photocatalysis by increasing the lifetime of photocatalyst/activated composite, reduced release of toxic by-products, synergism of adsorption with ROSs oxidation in the same platform and easy recovery of materials [30,31]. With the exception of activated carbon, many materials with high surface area including clays [32], zeolites [33], carbonaceous biomass [34] and synthesised MOFs [35] have been used as sorbing platforms to support photocatalytic NPs. Another example of hybrid systems is the so-called sono-photocatalysis, combining sonolysis and photocatalysis for enhanced ROSs yield generation, to prevent the fast deactivation of photocatalysis through in situ sonoregeneration and better mineralization of by-products [36] •.…”

Section: What the Scientific Community Has Done To Overcome The Techn...mentioning

confidence: 99%

SWOT analysis of photocatalytic materials towards large scale environmental remediation

Djellabi

Giannantonio²,

Falletta

et al. 2021

Current Opinion in Chemical Engineering

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A review of clay based photocatalysts: Role of phyllosilicate mineral in interfacial assembly, microstructure control and performance regulation

Cited by 67 publications

References 163 publications

Carbamazepine Removal by Clay-Based Materials Using Adsorption and Photodegradation

Carbamazepine Removal by Clay-Based Materials Using Adsorption and Photodegradation

Recent Breakthrough in Layered Double Hydroxides and Their Applications in Petroleum, Green Energy, and Environmental Remediation

SWOT analysis of photocatalytic materials towards large scale environmental remediation

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