Performance analysis of externally reflected photoreactor for CO2 conversion to methanol using f-C3N4/ZnV2O6 S-scheme photocatalyst

Bafaqeer, Abdullah; Tahir, Muhammad Nawaz; Amin, Nor Aishah Saidina; Al-Bastaki, Nader; Altowayti, Wahid Ali Hamood; Thabit, Hammam Abdurabu

doi:10.1016/j.eti.2023.103032

Cited by 14 publications

(3 citation statements)

References 48 publications

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“…Another study conducted by Tahir et al [80] worked with a novel externally reflected photoreactor for photocatalytic CO2 conversion in the liquid phase by the use of the functionalised carbon nitride (f-C3N4) modified with ZnV2O6 nanosheets and then compared with the solar photoreactor. The maximum production rate of CH3OH was 4.7 mole kgcat −1 , which was 1.25 times higher than the solar photoreactor (3.7 mole kgcat −1 ).…”

Section: Externally Side-illuminated Slurry Photoreactorsmentioning

confidence: 99%

Reactor and Plant Designs for the Solar Photosynthesis of Fuels

Degerli,

Gramegna,

Tommasi

et al. 2024

Energies

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Solar-boosted photo-technology stands out as a powerful strategy for photosynthesis and photocatalytic processes due to its minimal energy requirements, cost-effectiveness and operation under milder, environmentally friendly conditions compared to conventional thermocatalytic options. The design and development of photocatalysts have received a great deal of attention, whereas photoreactor development must be studied deeper to enable the design of efficient devices for practical exploitation. Furthermore, scale-up issues are important for this application, since light distribution through the photoreactor is a concurrent factor. This review represents a comprehensive study on the development of photoreactors to be used mainly for the photoreduction of CO2 to fuels, but with concepts easily transferable to other photosynthetic applications such as ammonia synthesis and water splitting, or wastewater treatment, photovoltaics combined to photoreactors, etc. The primary categories of photoreactors are thoroughly examined. It is also explained which parameters influence the design of a photoreactor and next-generation high-pressure photoreactors are also discussed. Last but not least, current technologies for solar concentrators are recalled, considering their possible integration within the photoreactor. While many reviews deal with photocatalytic materials, in the authors’ view, photoreactors with significant scale and their merged devices with solar concentrators are still unexploited solutions. These are the key to boost the efficiency of these processes towards commercial viability; thus, the aim of this review is to summarise the main findings on solar photoreactors for the photoreduction of CO2 and for related applications.

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Section: Externally Side-illuminated Slurry Photoreactorsmentioning

confidence: 99%

Reactor and Plant Designs for the Solar Photosynthesis of Fuels

Degerli,

Gramegna,

Tommasi

et al. 2024

Energies

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“…Furthermore, this composite is evidenced to possess a remarkably enhanced CO 2 adsorption capacity that is synergistically correlated with the fundamental feature of Ti 3 C 2 T x . Another group of vanadate compounds is ZnV 2 O 6 , which could be modified by proton-rich functionalized C 3 N 4 (f-C 3 N 4 ) to increase converting CO 2 in liquid form [161]. The f-C 3 N 4 /ZnV 2 O 6 composite exhibits superior performance in converting CO 2 through photosynthesis when NaOH solution is a reducing agent compared to utilizing H 2 O or KHCO 3 solutions in the photoreactor.…”

Section: Co 2 Reductionmentioning

confidence: 99%

New updates on vanadate compounds synthesis and visible-light-driven photocatalytic applications

et al. 2023

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Photocatalysis is known as a new and cost-effective method to solve the problems of energy shortage and environmental pollution. Although the application of this method seems practical, finding an efficient and stable photocatalyst with a suitable bandgap and visible-light sensitivity remains challenging. In this context, vanadate compounds photocatalysts have been synthesized and used as emerging composites, and their efficiency has been improved through elemental doping and morphology modifications. In this review, the major synthesis methods, and the design of the latest photocatalytic compounds based on vanadate are presented. In addition, the effect of vanadate microstructures on various photocatalytic applications such as hydrogen production, CO2 reduction, and removal of organic pollutants and heavy metals are discussed. For instance, the application of a 2D-1D BiVO4/CdS heterostructure photocatalyst enhances 40 times the hydrogen production from benzyl alcohol than pure BiVO4. Similarly, the InVO4/Bi2WO6 composite has a superior photocatalytic capability for the reduction of CO2 into CO compared to pure InVO4. A CO production rate of 18 μmol.g−1.h−1 can be achieved by using this heterostructure. Regarding the organic pollutants’ removal, the use of Montmorillonite/BiVO4 structure allows a complete removal of Brilliant Red 80 dye after only 2 hours of irradiation. Finally, copper heavy metal is reduced to 90 % in water, by using BiVO4/rGO/g-C3N4 optimized photocatalyst structure. Other examples on decorated vanadate compounds for enhancing photocatalytic activities are also treated.

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“…These emissions are due to the presence of intrinsic and extrinsic defects such as zinc and oxygen vacancies or zinc interstitials in the crystals. These defects can create trap states in the material that lead to non-radiative recombination and emission in the visible region[23][24][25][26][27]. The presence of yttrium ion (Y 3+ ) in the crystal lattice further increases the number of defects in the material, leading to reduced ultraviolet (UV) emissions and enhancing the deep green emission.…”

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confidence: 99%

Photoluminescence and thermoluminescence dosimetry properties of Ag/Y co‐doped ZnO nanophosphor for radiation measurements

Abdurabu Thabit,

Ismail,

Kabir

et al. 2024

Luminescence

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This work explores the thermoluminescence (TL) and photoluminescence (PL) properties of Ag/Y co‐doped zinc oxide (ZnO) nanophosphor. The proposed dosimeter was prepared by the coprecipitation method and sintered at temperatures from 400°C to 1000°C in an air atmosphere. Raman spectroscopy was studied to investigate the structural features of this composition. The new proposed dosimeter revealed two peaks at 150°C and 175°C with a small shoulder at high temperature (225°C). The PL spectrum showed strong green emissions between 500 to 550 nm. The Raman spectrum showed many bands related to the interaction between ZnO, silver (Ag), and yttrium oxide (Y2O3). The rising sintering temperature enhanced the TL glow curve intensity. The Ag/Y co‐doped ZnO nanophosphor showed an excellent linearity index within a dose from 1 to 4 Gy. The minimum detectable dose (MDD) of the Ag/Y co‐doped ZnO nanopowder (pellets) equaled 0.518 mGy. The main TL properties were achieved in this work as follows: thermal fading (37% after 45 days at 1 and 4 Gy), optical fading (53% after 1 h and 68% after 6 h by exposure to sunlight), effective atomic number (27.6), and energy response (flat behavior from 0.1 to 1.3 MeV). Finally, the proposed material shows promising results nominated to be used for radiation measurements.

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Performance analysis of externally reflected photoreactor for CO2 conversion to methanol using f-C3N4/ZnV2O6 S-scheme photocatalyst

Cited by 14 publications

References 48 publications

Reactor and Plant Designs for the Solar Photosynthesis of Fuels

Reactor and Plant Designs for the Solar Photosynthesis of Fuels

New updates on vanadate compounds synthesis and visible-light-driven photocatalytic applications

Photoluminescence and thermoluminescence dosimetry properties of Ag/Y co‐doped ZnO nanophosphor for radiation measurements

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