Advances in Nanomaterials for Photocatalysis

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Energy and Catalysis".

Deadline for manuscript submissions: closed (10 December 2024) | Viewed by 5026

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Kiel University of Applied Sciences, Institute for Materials & Surface Technologym, 24149 Kiel, Germany
Interests: nanomaterials; functional coatings; electrocatalysis; electrochemical processes
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Special Issue Information

Dear Colleagues,

Semiconductor nanomaterials and heterojunctions thereof, including those with (noble) metal nanoparticles, are of critical importance to photocatalysis. Over the past decades advances have been made to boost photocatalytic performance via designing multicomponent catalysts for a more efficient charge separation. The applications span a wide range of vital areas to the future of human society, most important among them are solar energy harvesting for water splitting, CO2 reduction and pollutant and microorganism control.

This special issue of “Nanomaterials” will address current progress and future perspectives of nanophotocatalysts. We are inviting qualified reviews and progress research papers on the following topics:

  • Nanomaterials design for photoelectrocatalysts, including 0D, 1D and 2D nanomaterials and their applications to water splitting;
  • Nanophotocatalysts for CO2 reduction;
  • Nanophotocatalysts for pollutant and microorganism control;
  • Processing methods, including but not limited to chemical, electrochemical and biomimetic methods;
  • Nanophotocatalysts supports, design, processing and property control.

Prof. Dr. Mohammed Es-Souni
Guest Editor

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Keywords

  • nanophotocatalysts
  • photocatalysis
  • water splitting
  • CO2 reduction
  • pollutant control
  • microorganism control
  • environmental remediation

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Published Papers (3 papers)

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Research

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14 pages, 2296 KiB  
Article
Fluoride-Treated Nano-HZSM-5 Zeolite as a Highly Stable Catalyst for the Conversion of Bioethanol to Propylene
by Jian Zhou, Ni Zhang, Tao Meng, Qiangsheng Guo, Zhaoteng Xue and Dongsen Mao
Nanomaterials 2024, 14(19), 1558; https://doi.org/10.3390/nano14191558 - 26 Sep 2024
Cited by 1 | Viewed by 994
Abstract
Fluoride treatment of ZSM-5 zeolite can effectively adjust surface acidity and generate a secondary pore structure. In this study, a series of modified nano-HZSM-5 zeolites were prepared by NH4F-HF mixed solution treatment and applied to the selective conversion of bioethanol to [...] Read more.
Fluoride treatment of ZSM-5 zeolite can effectively adjust surface acidity and generate a secondary pore structure. In this study, a series of modified nano-HZSM-5 zeolites were prepared by NH4F-HF mixed solution treatment and applied to the selective conversion of bioethanol to propylene at 500 °C, atmospheric pressure, and a WHSV of 10 h−1. The results showed that NH4F-HF modification weakened the surface acidity of nano-HZSM-5 zeolites, thus inhibiting coke formation. Additionally, the mesopores in the nano-HZSM-5 zeolites increased after NH4F-HF treatment, thereby enhancing the mass transfer rate and improving the coke-resistance ability. The NH4F-HF mixed solution modification significantly improved the stability of nano-HZSM-5 zeolites in catalyzing bioethanol to propylene and greatly extended the working life of nano-HZSM-5 zeolites. It can be seen from the characterization of the deactivated catalysts that coke deposition and weakening of acidity may be the key factors for catalyst deactivation. Full article
(This article belongs to the Special Issue Advances in Nanomaterials for Photocatalysis)
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17 pages, 5257 KiB  
Article
Nitrogen-Rich Triazine-Based Covalent Organic Frameworks as Efficient Visible Light Photocatalysts for Hydrogen Peroxide Production
by Shu Yang, Keke Zhi, Zhimin Zhang, Rukiya Kerem, Qiong Hong, Lei Zhao, Wenbo Wu, Lulu Wang and Duozhi Wang
Nanomaterials 2024, 14(7), 643; https://doi.org/10.3390/nano14070643 - 8 Apr 2024
Cited by 3 | Viewed by 2219
Abstract
Covalent organic frameworks (COFs) have been widely used in photocatalytic hydrogen peroxide (H2O2) production due to their favorable band structure and excellent light absorption. Due to the rapid recombination rate of charge carriers, however, their applications are mainly restricted. [...] Read more.
Covalent organic frameworks (COFs) have been widely used in photocatalytic hydrogen peroxide (H2O2) production due to their favorable band structure and excellent light absorption. Due to the rapid recombination rate of charge carriers, however, their applications are mainly restricted. This study presents the design and development of two highly conjugated triazine-based COFs (TBP-COF and TTP-COF) and evaluates their photocatalytic H2O2 production performance. The nitrogen-rich structures and high degrees of conjugation of TBP-COF and TTP-COF facilitate improved light absorption, promote O2 adsorption, enhance their redox power, and enable the efficient separation and transfer of photogenerated charge carriers. There is thus an increase in the photocatalytic activity for the production of H2O2. When exposed to 10 W LED visible light irradiation at a wavelength of 420 nm, the pyridine-based TTP-COF produced 4244 μmol h−1 g−1 of H2O2 from pure water in the absence of a sacrificial agent. Compared to TBP-COF (1882 μmol h−1 g−1), which has a similar structure but lacks pyridine sites, TTP-COF demonstrated nearly 2.5 times greater efficiency. Furthermore, it exhibited superior performance compared to most previously published nonmetal COF-based photocatalysts. Full article
(This article belongs to the Special Issue Advances in Nanomaterials for Photocatalysis)
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Review

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34 pages, 6710 KiB  
Review
Prospects of Halide Perovskites for Solar-to-Hydrogen Production
by Huilong Liu, Tulja Bhavani Korukonda and Shubhra Bansal
Nanomaterials 2024, 14(23), 1914; https://doi.org/10.3390/nano14231914 - 28 Nov 2024
Viewed by 1345
Abstract
Solar-driven hydrogen generation is one of the promising technologies developed to address the world’s growing energy demand in an sustainable way. While, for hydrogen generation (otherwise water splitting), photocatalytic, photoelectrochemical, and PV-integrated water splitting systems employing conventional semiconductor oxides materials and their electrodes [...] Read more.
Solar-driven hydrogen generation is one of the promising technologies developed to address the world’s growing energy demand in an sustainable way. While, for hydrogen generation (otherwise water splitting), photocatalytic, photoelectrochemical, and PV-integrated water splitting systems employing conventional semiconductor oxides materials and their electrodes have been under investigation for over a decade, lead (Pb)- halide perovskites (HPs) made their debut in 2016. Since then, the exceptional characteristics of these materials, such as their tunable optoelectronic properties, ease of processing, high absorption coefficients, and long diffusion lengths, have positioned them as a highly promising material for solar-driven water splitting. Like in solar photovoltaics, a solar-driven water splitting field is also dominated by Pb-HPs with ongoing efforts to improve material stability and hydrogen evolution/generation rate (HER). Despite this, with the unveiling potential of various Pb-free HP compositions in photovoltaics and optoelectronics researchers were inspired to explore the potential of these materials in water splitting. In this current review, we outlined the fundamentals of water splitting, provided a summary of Pb HPs in this field, and the associated issues are presented. Subsequently, Pb-free HP compositions and strategies employed for improving the photocatalytic and/or electrochemical activity of the material are discussed in detail. Finally, this review presents existing issues and the future potential of lead-free HPs, which show potential for enhancing productivity of solar-to-hydrogen conversion technologies. Full article
(This article belongs to the Special Issue Advances in Nanomaterials for Photocatalysis)
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