4.6 Article

Routes to visible light active C-doped TiO2 photocatalysts using carbon atoms from the Ti precursors

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2014.05.009

关键词

C-doped TiO2; Catalyst preparation; Photocatalysis

资金

  1. Science Foundation Ireland [07/SRC/B1160]
  2. SSE Renewables
  3. SFI-Airtricity-Stokes Professorship Grant

向作者/读者索取更多资源

In this work, different thermal treatments of titanium isopropoxide-derived photo-catalyst precursors, designed with the purpose of generating C-doped TiO2 photo-catalysts using carbon atoms present in the TiOx gel precursors as dopants, are presented. Specifically, these look at varying the standard calcination techniques using heat treatments in He (rather than calcination in air) and lower temperature calcinations (200 degrees C rather than 500 degrees C). The formed materials are characterised using N-2 physisorption, XRD, UV-Visible spectroscopy and XPS and their activities in promoting the oxidation of 4-chlorophenol under visible-light-only conditions were analysed. The nature of carbon remaining on the (or in the) material is discussed found to be both surface graphitic carbon and carbon present in anionic dopant positions. The different contributions of each type of carbon to the catalytic photo-activity under visible light are discussed. (C) 2014 Elsevier B.V. All rights reserved.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

Article Chemistry, Physical

Co-SBA-15 catalysts in the hydrolysis of NH3BH3 - Influences of Co precursors and catalyst pre-treatment

Rory Herron, Charles Marchant, James A. Sullivan

CATALYSIS COMMUNICATIONS (2018)

Article Materials Science, Multidisciplinary

Hierarchical 3D TiO2 Nanotube Arrays Sensitized by Graphene Oxide and ZnxCdyS for High Performance Photoelectrochemical Applications

Ruiyu Bao, Junfeng Geng, James A. Sullivan, Jianxin Xia, Wenzhong Wang, Wai-Yeung Wong, Hua Li

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE (2018)

Article Chemistry, Physical

Visible Light-Driven Gas-Phase Artificial Photosynthesis Reactions over Ruthenium Metal Nanoparticles Modified with Anatase TiO2

Eduardo Morais, Colin O'Modhrain, K. Ravindranathan Thampi, James A. Sullivan

INTERNATIONAL JOURNAL OF PHOTOENERGY (2019)

Article Chemistry, Multidisciplinary

CO2 Decomposition in CO2 and CO2/H2 Spark-like Plasma Discharges at Atmospheric Pressure

Sean Kelly, James A. Sullivan

CHEMSUSCHEM (2019)

Article Chemistry, Applied

Synthesis of a Sustainable Cellulose-Derived Biofuel Through a 1-Pot, 2-Catalyst Tandem Reaction

Lisa Mullins, James A. Sullivan

TOPICS IN CATALYSIS (2020)

Article Chemistry, Multidisciplinary

Ti-Doped SBA-15 Catalysts Used in Phenol Oxidation Reactions

Ghadeer Almohammadi, Colin O'Modhrain, Sean Kelly, James A. Sullivan

ACS OMEGA (2020)

Article Chemistry, Multidisciplinary

Photo-Dissociation of CO2 over Plasmonic RuO2 Nanoparticles

Eduardo Morais, K. Ravindranathan Thampi, James A. Sullivan

CHEMISTRYSELECT (2020)

Article Chemistry, Physical

Scope for Spherical Bi2WO6 Quazi-Perovskites in the Artificial Photosynthesis Reaction-The Effects of Surface Modification with Amine Groups

Eduardo Morais, Kristy Stanley, K. Ravindranathan Thampi, James A. Sullivan

Summary: The synthesis, characterisation, and modification of Bi2WO6 particles for application in artificial photosynthesis reactions are described. The modification with amine groups improved oxygen production ability while decreasing overall photocatalytic reactivity, with a change in product selectivity towards CH4/CO ratio. This opens up new possibilities for the catalyst but further research is needed to fully understand the observations.

CATALYSIS LETTERS (2021)

Article Chemistry, Multidisciplinary

Enhanced Stability and Emission Properties of Perylene Dyes by Surface Tethering: Preparation of Fluorescent Ru Nanoparticle Suspensions by Alkyne Linker Chemistry

Eduardo Morais, Cara Moloney, Colin O'Modhrain, Eoin McKiernan, Dermot F. Brougham, James A. Sullivan

Summary: Spherical ruthenium nanoparticles were successfully synthesized via a low-temperature solvothermal process without the need for templates or structure-directing agents. Surface passivation with a fluorescent perylene dye and silane ligands provided stable suspensions, with an estimated surface coverage of approximately 15%. The photophysical evaluation showed enhanced fluorescence and photostability for the bound dye.

CHEMISTRY-A EUROPEAN JOURNAL (2021)

Article Chemistry, Physical

RuO2/TiO2 photocatalysts prepared via a hydrothermal route: Influence of the presence of TiO2 on the reactivity of RuO2 in the artificial photosynthesis reaction

Eduardo Morais, Colin O'Modhrain, K. Ravindranathan Thampi, James A. Sullivan

Summary: The study investigates the formation of nanocomposites by incorporating TiO2 (at two different loadings) with plasmonic RuO2 nanoparticles (with an average size of (3 +/- 0.7) nm). XRD results show the formation of RuO2 in the rutile phase, with high levels of TiO2 forming the rutile phase and lower levels forming the anatase phase. The TiO2 incorporation significantly enhances the reactivity of RuO2 in the artificial photosynthesis reaction under visible light, leading to increased catalyst activities and changed reaction selectivity.

JOURNAL OF CATALYSIS (2021)

Article Engineering, Environmental

Degradation of an antibiotic via a photo-Fenton process on block copolymer-nanopatterned iron oxide coated substrates

Aislan Esmeraldo Paiva, Jhimli Paul Guin, Jhonattan Frank Baez Vasquez, K. Ravindranathan Thampi, James A. Sullivan, Fernanda G. L. Medeiros Borsagli, Michael A. Morris

Summary: Porous iron oxide structures were produced on glass substrates using block copolymer templating. XRD and XPS studies revealed the coexistence of FeIII/FeII. Vertically aligned PS cylinders with pore sizes of 35, 45 and 400 nm were obtained by varying the annealing time. The iron oxide-covered glass substrates showed efficient degradation of levofloxacin solution through a photo-Fenton process.

CHEMICAL ENGINEERING JOURNAL (2023)

Article Engineering, Environmental

Visible light induced degradation of perfluorooctanoic acid using iodine deficient bismuth oxyiodide photocatalyst

Jhimli Paul Guin, James A. Sullivan, Jimmy Muldoon, K. Ravindranathan Thampi

Summary: A bismuth oxyiodide photocatalyst with coexistent iodine deficient phases was prepared and used for the degradation of perfluorooctanoic acid at low concentrations under simulated solar light irradiation. High rates of PFOA degradation and defluorination were achieved through parallel redox reactions with photoexcited electrons and superoxide radicals. The catalyst transformed into a more iodine deficient phase during photocatalysis.

JOURNAL OF HAZARDOUS MATERIALS (2023)

Article Chemistry, Physical

Effect of Ni NP morphology on catalyst performance in non-thermal plasma-assisted dry reforming of methane

Kristy Stanley, Sean Kelly, James A. Sullivan

Summary: Supported nickel nanoparticle catalysts with different morphologies were studied in the non-thermal plasma-promoted dry reforming of methane. Catalysts with dendritic and flake-like particles, which had a higher ratio of (111) lattice planes and surface structures in the nanoscale, showed higher conversions and yields compared to spherical analogues. This is attributed to the favorable (111) faces for methane dissociation and the potential for microdischarges formation around their small surface features. All tested materials exhibited higher methane conversion and hydrogen production compared to reactions conducted without a catalyst.

APPLIED CATALYSIS B-ENVIRONMENTAL (2023)

Article Environmental Sciences

Enhanced removal of perfluorooctanoic acid with sequential photocatalysis and fungal treatment

Mohd Faheem Khan, Jhimli Paul Guin, Ravindranathan K. Thampi, James A. Sullivan, Cormac D. Murphy

Summary: This paper investigates the degradation of perfluorooctanoic acid (PFOA) using a photocatalyst (bismuth oxyiodide, BiOI) and a fungal biocatalyst (Cunninghamella elegans). Both the photocatalyst and biocatalyst can degrade 35-40% of 100 ppm PFOA individually, with 20-30% defluorination. However, a combination of the two treatments results in a higher degradation rate of 90% and defluorination rate of 60%. The study also identifies the products formed during the degradation process and reveals the mechanism of PFOA biodegradation.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2023)

Review Engineering, Chemical

Challenges Facing Sustainable Visible Light Induced Degradation of Poly- and Perfluoroalkyls (PFA) in Water: A Critical Review

Jhimli Paul Guin, James A. Sullivan, K. Ravindranathan Thampi

Summary: Poly- and perfluoroalkyls (PFAs) are serious threats to the environment due to their persistence and long-range spreading. Visible-light induced degradation using photocatalysts shows promising results for remediation of PFAs, but there are challenges in upscaling it for practical applications. This Review critically analyzes recent advancements in photocatalytic remediation of aqueous PFAs under visible light irradiation and suggests future directions for practical applications.

ACS ENGINEERING AU (2022)

Article Chemistry, Physical

Colorimetric and fluorimetric detection of CN- ion using a highly selective and sensitive chemosensor derived from coumarin-hydrazone

Wiem Bouali, Muejgan Yaman, Nurgul Seferogu, Zeynel Seferogu

Summary: Novel chemosensors, including coumarin hydrazide, were synthesized and demonstrated the ability to detect cyanide ions through absorption and fluorescence turn-off response. The reaction mechanism between the sensors and the ions was determined through experimental and theoretical studies. The sensors exhibited high detection ability and effectiveness.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2024)

Article Chemistry, Physical

Accelerated naked-eye identification of cations using non-plasmonic amplification by functionalized GQDs: A novel photochemical microfluidic sensor for environmental/mineral analysis using Lab-on-paper technology

Parinaz Abdollahian, Hassan Heidari, Soheila Hassanzadeh, Mohammad Hasanzadeh

Summary: This study successfully synthesized various types of thiolated-graphene quantum dots (GQDs) and utilized them in a one-droplet microfluidic paper-based analytical device for the simultaneous multi-sensing of heavy metal ions. The GQDs were functionalized and stabilized on the surface of hydrophobic fiber-glass, enabling colorimetric chemosensing of ions including iron, copper, cobalt, mercury, chrome, manganese, and nickel. The results were confirmed using fluorescence spectrometry, and the platform showed potential for facile metal ion detection in human urine models and environmental fluids.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2024)

Article Chemistry, Physical

Kinetic study of azobenzene photoisomerization under ambient lighting

S. L. Barrett, C. Meyer, E. Cwiklik, V Fieglein, M. Burns, J. Guerrero, W. J. Brittain

Summary: Laboratory illumination is strong enough to create a photostationary state (PSS) of amphiphilic azo-benzene compounds in water. The [cis]PSS/[trans]PSS ratios were observed to be 0.33-1.2 in D2O and 0.37-3.8 in dimethyl sulfoxide-d6. ortho-Fluoroazobenzene amphiphiles show higher cis-isomer concentration at equilibrium compared to non-fluorinated compounds due to differences in optical absorption profiles. The kinetics of isomerization were measured using UV-Vis spectroscopy and the ratio of trans-to-cis rates does not directly correlate with the observed PSS. The half-life for PSS formation is 40 minutes for fluorinated compounds and 80 minutes for non-fluorinated compounds.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2024)

Article Chemistry, Physical

Synthesis of eco-friendly carboxymethyl cellulose /metal-organic framework biocomposite and its photocatalytic activity

Jalil Khodayari, Karim Zare, Omid Moradi, Mohammadreza Kalaee, Niyaz Mohammad Mahmoodi

Summary: In this study, an eco-friendly biocomposite (CMC/MIL/CuO) was synthesized and characterized, and its ability to decolorize Acid Blue 92 dye was investigated. The results showed that CMC/MIL/CuO can be used as a suitable photocatalyst for dye decolorization.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2024)

Article Chemistry, Physical

Constructing the Cu2O@Au/Cu2O integrated heterostructure cooperated with LSPR effect for enhanced photocatalytic performance via a three-in-one synergy

Bo Ma, Qian Xu, Huajun Yao, Yalin Chen, Yiyang Wang, Yunfei Yang, Hongfang Shen, Youjun Lu

Summary: This study designed an integrated structure of Cu2O@Au/Cu2O heterostructure particles, which achieved significantly enhanced photocatalytic performance by simultaneously considering the integrated structural characteristics and localized surface plasmon resonance (LSPR) effect. Experimental characterization and theoretical simulation confirmed the three-in-one synergy of the integrated heterostructure, including the LSPR effect of Au nanoparticles, the light scattering based on core-shell heterostructure, and the effective charge separation based on inter-embedded heterostructure. The concept of integrated heterostructure cooperated with LSPR effect provides a new strategy for designing future catalysts.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2024)

Article Chemistry, Physical

Effects of pH-dependent speciation on the photolytic degradation mechanism of phosphonates

Robert G. H. Marks, Sarah P. Rockel, Klaus Kerpen, Holger Somnitz, Philipp R. Martin, Maik A. Jochmann, Torsten C. Schmidt

Summary: This study investigated the pH-dependent photolysis of phosphonates in aqueous solutions and analyzed the transformation products. The results showed that the photolysis rate of phosphonates was influenced by pH and light conditions. Furthermore, the carbon kinetic isotope effects varied for different types of phosphonates.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2024)

Article Chemistry, Physical

Surface chemistry of phytochemical enriched MgO nanoparticles for antibacterial, antioxidant, and textile dye degradation applications

T. M. Naren Vidaarth, S. Surendhiran, K. S. G. Jagan, S. Savitha, K. S. Balu, A. Karthik, B. Kalpana

Summary: In this study, magnesium oxide nanoparticles were synthesized using plant seed extracts, which exhibited excellent performance in removing dyes from textile water bodies. These nanoparticles also showed strong antibacterial and antioxidant properties.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2024)

Article Chemistry, Physical

Activation mechanisms of recombination processes in irradiated poly (arylenephthalides)

Mikhail Yu. Ovchinnikov, Vyacheslav A. Antipin, Sergey L. Khursan

Summary: In this study, the recombination of separated ion-radical states (SIRS) in PAPh films was analyzed, and it was found that the contribution of X-SIRS recombination to total luminescence varies with different environments. It was also shown that the recombination of labile SIRS is independent of the nature of the atmosphere. The study theoretically substantiated that SIRS recombination can occur via the transfer of both positive and negative charges, and the efficiency of thermal activation of recombination processes depends on the ratio of radiant and conductive channels of energy transfer.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2024)

Article Chemistry, Physical

Search of electron-rich and electron-deficient building blocks through data mining and library generation for the designing of polymers for organic solar cells

Sumaira Naeem, Tayyaba Mubashir, Mudassir Hussain Tahir, Jawayria Najeeb, Ahmed Z. Dewidar, Hosam O. El-ansary, Silas Lagat, Anthony Pembere

Summary: This study presents an alternative methodology using machine learning for the selection of novel organic molecules to develop high-performance organic solar cell devices.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2024)

Article Chemistry, Physical

Influence of nickel doping and cotton stalk activated carbon loading on structural, optical, and photocatalytic properties of zinc oxide nanoparticles

D. Thirumoolan, S. Ragupathy, S. Renukadevi, P. Rajkumar, Rajakumar S. Rai, R. M. Saravana Kumar, Imran Hasan, Mani Durai, Young-Ho Ahn

Summary: In this study, the photodegradation of brilliant green dye was studied in relation to the comparative photocatalytic activity of pure ZnO and Ni-doped ZnO/CSAC. The Ni-doped ZnO/CSAC showed a higher photocatalytic degradation rate under visible light irradiation, suggesting its potential as an effective wastewater treatment material.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2024)

Article Chemistry, Physical

Synthesis of novel 2D ZIF-8 single sheet from bulk multilayed ZIF-8 crystal, through facile mixed solutin strategy, with enhanced photocatalytic performance

Ajmal Khan, Zhidong Chang, Wenjun Li, Xiaohui Ma, Mei Dong, Liang Geng, Ghulam Yasin, Shuaib Khan, Hira Anwar

Summary: Due to its functional structure and tunable shape, 2D zeolitic imidazole framework (ZIFs) have gained significant interest in various fields. In this study, thin ZIF-8 sheets were prepared using a mixed solvent and then delaminated into single layers through physical sonication. These hexagonal sheets exhibited high stability and controlled morphology, and showed excellent performance in dye degradation compared to 3D ZIF-8 crystals.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2024)

Article Chemistry, Physical

Bifunctional photo- and ionochromic hybrids of indolyl(thienyl) diarylethenes and rhodamine

Vitaly A. Podshibyakin, Evgenii N. Shepelenko, Leonid D. Popov, Tatyana M. Valova, Anton O. Ayt, Lyudmila G. Kuzmina, Anton V. Lisovin, Oleg N. Burov, Mikhail E. Kletskii, Alexander D. Dubonosov, Vladimir A. Bren

Summary: Bifunctional hybrids containing photochromic indolyl(thienyl) diarylethenes and an ionochromic rhodamine moiety connected by a dimethylene spacer were synthesized. These hybrids exhibit absorption at 450-455 nm and fluorescence at 560 nm in toluene. UV light triggers ring-closed non-fluorescent diarylethene formation, which can be reversed under visible light or in the dark. In the presence of H+ cation, a naked eye effect is observed with the opening of the rhodamine-spirolactam ring and a pink-crimson coloration at 561 nm accompanied by intense long-wavelength emission at 586 nm. This process is reversible by exposure to triethylamine, as confirmed by NMR experiments. The light-induced isomerizations and proton-induced transformations were explained using computational methods. Reversible switching of fluorescent properties can be achieved by light irradiation and proton.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2024)

Article Chemistry, Physical

Green synthesis of silver nanoparticles (AgNPs) by Lallemantia royleana leaf Extract: Their Bio-Pharmaceutical and catalytic properties

Majid Sharifi-Rad, Hazem S. Elshafie, Pawel Pohl

Summary: The study investigated the synthesis of silver nanoparticles using Lallemantia royleana leaf extract, characterized their physico-chemical properties, and evaluated their biopharmaceutical and catalytic applications. The synthesized nanoparticles showed good stability and exhibited higher antioxidant, antimicrobial, anti-inflammatory, anti-arthritic, and cytotoxic activities compared to the leaf extract. These results provide a promising green synthesis route for silver nanoparticles with potential biomedical and catalytic applications.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2024)

Article Chemistry, Physical

Preparation of persistently luminescent polyacrylic acid-based nanocomposite ink for secure encoding

Meera Moydeen Abdul Hameed, Badr M. Thamer

Summary: Security encoding using photochromism is an effective method for creating authentication substrates. A unique photochromic ink has been developed that emits light continuously under UV rays and darkness. The ink is produced by dispersing lanthanidedoped aluminate nanoparticles in a polymer binder. The resulting composite ink can be used to create transparent films on paper, and the stamped patterns become visible under UV rays, changing from colorless to green.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2024)

Article Chemistry, Physical

Oxazoline-appended benzimidazolium salts for selective micromolar detection of Fe3+ions in water and an experimental and theoretical insight into Fe3+ion sensing mechanism

Monika Lamoria, Rita Kakkar, Marilyn Daisy Milton

Summary: Four novel water-soluble benzimidazolium and bis-benzimidazolium salts with a fluorophore-spacer-receptor design were synthesized and demonstrated to selectively detect Fe3+ ions with large Stokes shifts. The binding mechanism and detection performance were investigated through theoretical and experimental studies.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2024)