Article
Chemistry, Multidisciplinary
Juliette Karpiel, Pierre Lonchambon, Frederic Dappozze, Ileana Florea, Diana Dragoe, Chantal Guillard, Nathalie Herlin-Boime
Summary: In an attempt to produce alkenes efficiently, a photocatalytic process has been developed to selectively obtain ethylene from propionic acid degradation. Copper oxide-modified titanium dioxide nanoparticles were synthesized using laser pyrolysis, and the synthesis atmosphere strongly influenced the morphology and selectivity of the photocatalysts towards different hydrocarbons and H2 products. Under a helium environment, highly dispersed copper species in CuxOy/TiO2 promoted the production of C2H6 and H2, while under an argon environment, copper oxides organized into distinct nanoparticles favored the production of C2H4, with selectivity as high as 85% compared to 1% with pure TiO2.
Article
Green & Sustainable Science & Technology
Yawei Yang, Riyao Wang, Zhongji Han, Rui Wang, Jiancheng He, Chengyu Zhang, Wenxiu Que
Summary: Semiconductor photocatalysis using TiO2 nanomaterials has shown promise in the degradation of micropollutants for environmental remediation. In this study, a scalable and refreshable photocatalytic foam was successfully fabricated by immobilizing TiO2 catalyst nanoparticles on EVA foam. The fabricated foam demonstrated excellent photocatalytic activity, stability, and refreshability for in-situ micropollutant degradation.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Polymer Science
Iryna Kovinchuk, Nadiia Haiuk, Giuseppe Lazzara, Giuseppe Cavallaro, Georgii Sokolsky
Summary: The photocatalytic degradation of low-density polyethylene (PE) films with titanium and manganese dioxide nanoparticles was investigated. Composite PE films with different photocatalysts were prepared and subjected to UV irradiation. Tests and measurements on the PE films were conducted to evaluate the effects of the nanoparticles on the degradation and thermal behavior of PE. The results showed the coupling effects of titanium and manganese dioxide nanoparticles on PE degradation, and the influence of the nanoparticles on the tensile properties and wettability of the films.
POLYMER DEGRADATION AND STABILITY
(2023)
Article
Environmental Sciences
Jiatao Dang, Wenjun Pei, Fumeng Hu, Zaihui Yu, Shuheng Zhao, Jianjun Hu, Jiuli Liu, Dongliang Zhang, Zhixuan Jing, Xuan Lei
Summary: This study investigated the photocatalytic degradation of sulfamethoxazole (SMX) using a TiO2/BC composite. The results showed that TiO2/BC-5-300 exhibited the highest degradation efficiency for SMX, reducing its impact on the growth of bean sprouts. This study provides important data and theoretical support for the treatment of antibiotic-contaminated wastewater using TiO2/BC.
Article
Green & Sustainable Science & Technology
Miguel Diaz-Sanchez, Roxana Nicoleta Murgu, Diana Diaz-Garcia, Jose M. Mendez-Arriaga, Sanjiv Prashar, Bela Urban, Jiri Pinkas, Martin Lamac, Michal Horacek, Santiago Gomez-Ruiz
Summary: This study synthesized titanium dioxide nanomaterials with improved catalytic and photocatalytic properties through co-doping with copper and fluorine. These nanomaterials showed effective degradation of industrial and emerging contaminants, as well as activity in coupling reactions and energy-related photocatalytic processes, making them potentially suitable for cleaner energy generation.
ADVANCED SUSTAINABLE SYSTEMS
(2021)
Article
Engineering, Environmental
Xueying Cheng, Renquan Guan, Yunning Chen, Yudan Qian, Qingkun Shang, Yingnan Sun
Summary: In this study, the adsorption and photocatalytic degradation of oxytetracycline (OTC) were investigated using different metal-doped TiO2 nanocatalysts (M-TiO2, M = Fe, Co, Ni, Cr). The effects of different metal dopants on the adsorption and degradation abilities of TiO2 were studied. The photocatalytic performance of Fe-TiO2 was found to be excellent due to the synergy between the separation ability of photogenerated carriers and the adsorption ability of pollutants.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Devagi Kanakaraju, Muhamad Akif Aizuddin Jasni, Andrea Pace, Muhamad Hazim Ya
Summary: The Cu/TiO2/FA composite was optimized for the removal of the model dye pollutant methyl orange under visible light irradiation using response surface methodology and Box-Behnken experimental design. The study considered three independent variables and achieved a 99.91% removal rate under the optimal operating conditions. The results support the hypothesis of a combined and synergic adsorption-photocatalytic degradation process for pollutant removal.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Karen Yuanting Tang, James Xiaoyuan Chen, Enrico Daniel R. Legaspi, Cally Owh, Ming Lin, Ice Si Yin Tee, Dan Kai, Xian Jun Loh, Zibiao Li, Michelle D. Regulacio, Enyi Ye
Summary: The Au-embedded TiO2 nanofibers showed superior photocatalytic degradation efficiency for organic dye pollutants, attributed to the plasmon resonance absorption of Au nanoparticles and effective charge separation at the Au-TiO2 hybrid heterojunction.
Article
Engineering, Environmental
Andrew B. Holmes, Aldrich Ngan, Kayleanna Giesinger, Frank Gu
Summary: In this paper, the tunability of Se reduction products during the photocatalytic reduction of selenate over TiO2 in synthetic mine-impacted brines was investigated. It was found that the solution temperature and formic acid concentration had a significant impact on the selenate removal kinetics and selectivity towards H2Se(g) or Se0(s). A two-pronged electron transfer model was proposed to explain the selectivity under varying conditions.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Patricia Renones, Fernando Fresno, Freddy E. Oropeza, Victor A. de la Pena O'shea
Summary: This work investigates the role of In2O3 in a heterojunction with TiO2, aiming to enhance the photocatalytic activity for gas-phase CO2 reduction. Different behaviors are observed depending on the nature of the used In2O3. Commercial In2O3 with high crystallite sizes improves the activity and selectivity to methane compared to TiO2, while laboratory-made In2O3 with low crystallite size leads to a further change in selectivity toward CH4, although the total conversion is lower. The presence of In2O3 enhances charge transfer and separation, particularly in the case of smaller particles. Ternary systems formed by these heterojunctions with silver nanoparticles show a drastic change in selectivity toward methane, indicating the role of silver as an electron collector.
Article
Chemistry, Inorganic & Nuclear
Shweta Manchwari, Jaya Khatter, R. P. Chauhan
Summary: This study focuses on the synthesis of TiO2/CdS nanocomposites with different concentrations of precursors and their characterization using various techniques. The results show that TiO2/CdS nanocomposites exhibit excellent photocatalytic performance in the visible range compared to pure TiO2, and they have better degradation efficiency for methylene blue dye compared to rhodamine B dye. The optimum photocatalytic performance is achieved with a 1:1 M ratio of cadmium and sulphur precursors.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Y. M. Hunge, A. A. Yadav, Sovann Khan, Kai Takagi, Norihiro Suzuki, Katsuya Teshima, Chiaki Terashima, Akira Fujishima
Summary: Organic impurities such as dyes, acids, and alcohols are discharged into potable water sources, posing a global environmental challenge. Conventional methods for removing these pollutants are inefficient, leading to the exploration of advanced oxidation processes like photocatalysis. The study demonstrates that TiO2@nanodiamond composites show efficient degradation of organic pollutants under UV light, offering a promising solution for wastewater treatment.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Shiyang Zhang, Mingwei Cai, Jiahao Wu, Zhi Wang, Xiaochuang Lu, Kaixin Li, Jng Min Lee, Yonggang Min
Summary: TiO2/MXene composites were synthesized and showed enhanced removal efficiency for methylene blue (MB) dye. The removal rate of MB by TiO2/MXene composite materials was 96.44% under ultraviolet light, 29.83% higher than pure TiO2. Under visible light, the removal rate of MB was 8.26 times higher (40.19%) than pure TiO2. This enhancement was attributed to improved charge antirecombination and high adsorption capability toward MB.
CATALYSIS COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Vijaya Kumari, Anuradha Sharma, Naveen Kumar, Mika Sillanpaa, Peter R. Makgwane, Md. Ahmaruzzaman, Ahmad Hosseini-Bandegharaei, Manju Rani, P. Chinnamuthu
Summary: Industrial pollution is a significant issue in the world of continuous innovation and intensive development. Organic contaminants from textile industries cause environmental damage and sustainability issues. Heterogeneous photocatalysis using TiO2-CeO2 based nanostructure semiconductor materials has shown great potential for efficient removal of these pollutants under light irradiation.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Chanagun Wongburapachart, Phuwadej Pornaroontham, Kyusung Kim, Pramoch Rangsunvigit
Summary: Photocatalysis is an eco-friendly technology that can contribute to achieving the Sustainable Development Goals. However, conventional photocatalysts have limitations such as slow kinetics, limited excitation wavelengths, and environmental restrictions. This study focuses on the development of a photo-chargeable photocatalyst that can operate even in the absence of light, and investigates the effects of synthesis conditions on its photocatalytic properties.
Article
Chemistry, Physical
Chloe Indermuhle, Eric Puzenat, Frederic Dappozze, France Simonet, Lina Lamaa, Laure Peruchon, Cedric Brochier, Chantal Guillard
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2018)
Article
Materials Science, Multidisciplinary
Stephanie Pigeot-Remy, Damia Gregori, Roumayssaa Hazime, Alexandre Herissan, Chantal Guillard, Corinne Ferronato, Sophie Cassaignon, Christophe Colbeau-Justin, Olivier Durupthy
JOURNAL OF MATERIALS SCIENCE
(2019)
Article
Chemistry, Multidisciplinary
Nidhal Fessi, Mohamed Faouzi Nsib, Yves Chevalier, Chantal Guillard, Frederic Dappozze, Ammar Houas, Leonardo Palmisano, Francesco Parrino
Article
Chemistry, Multidisciplinary
Jie Yu, Juying Lei, Lingzhi Wang, Chantal Guillard, Jinlong Zhang, Yongdi Liu, Masakazu Anpo
RESEARCH ON CHEMICAL INTERMEDIATES
(2019)
Article
Chemistry, Physical
Annika Holm, Marwa Hamandi, France Simonet, Bernadette Jouguet, Frederic Dappozze, Chantal Guillard
APPLIED CATALYSIS B-ENVIRONMENTAL
(2019)
Article
Chemistry, Physical
Annika Holm, Marwa Hamandi, Karima Sahel, Frederic Dappozze, Chantal Guillard
Article
Chemistry, Physical
Jie Yu, Angel Caravaca, Chantal Guillard, Philippe Vernoux, Liang Zhou, Lingzhi Wang, Juying Lei, Jinlong Zhang, Yongdi Liu
Summary: A highly efficient photocatalyst for degrading toluene has been developed, capable of converting 93% of toluene into non-toxic products. This enhanced performance is attributed to the inverse opal structure and the incorporation of carbon nitride quantum dots.
Article
Chemistry, Physical
Jie Yu, Frederic Dappozze, Juan Martin-Gomez, Jesus Hidalgo-Carrillo, Alberto Marinas, Philippe Vernoux, Angel Caravaca, Chantal Guillard
Summary: The valorization of glycerol into high added-value products by photocatalysis not only creates good economic benefits, but also meets global low-carbon and energy-saving environmental protection needs. This study found that WO3-based materials exhibit outstanding selectivity towards valuable oxidation products like glyceraldehyde, establishing a new starting point for the development of advanced materials for efficient glycerol valorization.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Editorial Material
Chemistry, Physical
Chantal Guillard, Didier Robert
Article
Chemistry, Multidisciplinary
Nicolas Crespo-Monteiro, Marwa Hamandi, Maria Alejandra Usuga Higuita, Chantal Guillard, Frederic Dappozze, Damien Jamon, Francis Vocanson, Yves Jourlin
Summary: Surface micro-nanostructuring can enhance the photocatalytic efficiency of sol-gel TiO2 coatings during formic acid degradation, leading to improved functionality and properties. Different factors, such as annealing temperature and layer thickness, can affect the degradation process.
Article
Biochemistry & Molecular Biology
Insaf Abdouli, Frederic Dappozze, Marion Eternot, Chantal Guillard, Nadine Essayem
Summary: This paper provides evidence that the model reaction of aqueous dihydroxyacetone (DHA) conversion is influenced by both the acidity and basicity of TiO2 catalysts. Different products are obtained through two parallel pathways.
Article
Chemistry, Physical
Nouha Mediouni, Frederic Dappozze, Lhoussain Khrouz, Stephane Parola, Abdesslem Ben Haj Amara, Hafsia Ben Rhaiem, Nicole Jaffrezic-Renault, Philippe Namour, Chantal Guillard
Summary: This study investigated the generation of hydrogen peroxide on commercial and synthesized ZnO from different precursors using model molecules and phenolic intermediates. The results showed that the improved efficiency of ZnO photocatalysis is related to the production of H2O2, the reduction of oxygen vacancies, and the similar number of moles of H2O2 formed per number of carbon atoms removed.
Article
Chemistry, Physical
Jie Yu, Jesus Gonzalez-Cobos, Frederic Dappozze, Nicolas Grimaldos-Osorio, Philippe Vernoux, Angel Caravaca, Chantal Guillard
Summary: In this study, a pioneering photoelectrolyser with a non-noble metal-based photoanode (WO3) was designed, tested and optimized for the valorization of glycerol. The system operated in near-neutral conditions using a proton-exchange membrane (PEM) and selectively oxidized glycerol on the anode while producing purified hydrogen on the cathode. The influence of light irradiation, external bias and cell temperature on the production rates of glyceraldehyde (GAD), dihydroxyacetone (DHA) and hydrogen was investigated, and the long-term stability of the photoelectrolyser was validated.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Juliette Karpiel, Pierre Lonchambon, Frederic Dappozze, Ileana Florea, Diana Dragoe, Chantal Guillard, Nathalie Herlin-Boime
Summary: In an attempt to produce alkenes efficiently, a photocatalytic process has been developed to selectively obtain ethylene from propionic acid degradation. Copper oxide-modified titanium dioxide nanoparticles were synthesized using laser pyrolysis, and the synthesis atmosphere strongly influenced the morphology and selectivity of the photocatalysts towards different hydrocarbons and H2 products. Under a helium environment, highly dispersed copper species in CuxOy/TiO2 promoted the production of C2H6 and H2, while under an argon environment, copper oxides organized into distinct nanoparticles favored the production of C2H4, with selectivity as high as 85% compared to 1% with pure TiO2.
Article
Biochemistry & Molecular Biology
L. M. Betts, F. Dappozze, M. Hamandi, C. Guillard
Summary: The decomposition of ethanol under green conditions for the synthesis of acetal was investigated using TiO2 activated under UV-A radiation. The nature of TiO2 and the presence of Pt were found to affect the formation of acetal and acetaldehyde. Rutile TiO2 without noble metal increased acetal formation, while Pt deposition facilitated acetal formation at lower concentrations of acetaldehyde.
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
(2022)
Article
Chemistry, Physical
Ming-Yi Chen, Ngoc Thanh Thuy Tran, Ahmed Abubakar Alao, Wen-Dung Hsu
Summary: This study demonstrates the significance of surface Pt atom arrangement for the efficiency of ORR in PEMFCs and reveals the correlation between Pt-Pt average distance and O2 dissociation barrier. Furthermore, the study discovers a robust correlation between the level of the catalyst's d-band center and O2 adsorption energy. High-entropy alloy substrates provide potential for controlling Pt arrangement and O2 dissociation barrier.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Eduardo C. Atayde Jr, Babasaheb M. Matsagar, Yu-Cheng Wang, Kevin C. -W. Wu
Summary: This study presents the first application of an acidic MOF, Sulfated MOF-808, in catalyzing the HAA reactions of furan oligomers for the production of biofuel precursors. The catalyst showed high yield, selectivity, and recyclability, making it versatile for different starting materials.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Maria do Carmo Rangel, Francieli Martins Mayer, Soraia Jesus de Oliveira, Sergio Gustavo Marchetti, Fabricio Luiz Faita, Doris Ruiz, Giovanni Saboia, Mariana Kieling Dagostini, Jonder Morais, Maria do Carmo Martins Alves
Summary: This study developed a new catalyst by investigating the effect of magnesium on the catalytic properties of hematite in ethylbenzene dehydrogenation. The catalyst showed important differences in activity, selectivity, and stability, making it a promising candidate for commercial applications.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yanjun Li, Qian Wang, Hui Tian, Mingyuan Zhu, Yuanyuan Liu
Summary: A novel strategy using microwave-assisted precipitation was proposed to prepare defective CsH3PMo11VO40 catalyst for the oxidation of methacrolein to methacrylic acid. Microwave treatment accelerates crystallization, increases vanadyl species content, and forms defective Keggin structures, thereby enhancing the oxidation capacity of the catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Rajeshwari Athavale, Sailee Gardi, Fatima Choudhary, Dayanand Patil, Nandkishor Chandan, Paresh More
Summary: In this study, a novel acidic ionic liquid catalyst was prepared and used for the synthesis of bis-indolyl methane derivatives. The catalyst exhibited short reaction times, easy purification, and reusability.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Masatomo Hattori, Takato Hattori, Masakuni Ozawa
Summary: Cu-added gamma-Al2O3 catalysts were prepared with varying Cu loadings and the effects of copper oxidation states on catalytic activity were investigated. The results showed that the addition of copper increased the catalyst activity, but excessive copper loading decreased catalytic activity. XRD and TEM analysis indicated the formation of a solid solution of copper oxide species on the surface of gamma-Al2O3. XAS and TPR data demonstrated variations in copper oxidation states among the catalysts.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liwei Fang, Shiyang Niu, Shengsen Wang, Yiqing Lu, Yuanhui Cheng
Summary: In this study, PtNi alloy on nitrogen-doped carbon and SnO2 dual-support was designed to modulate the metal-support interaction, resulting in improved catalytic activity and stability for oxygen reduction reaction. The SnO2/PtNi/NC catalyst exhibited a strongly coupled interface, enhanced electron transfer, and higher half-wave potential compared to PtNi/NC and commercial Pt/C.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura
Summary: This study investigates the catalytic performance of a composite catalyst composed of ZnZrOX and H-zeolite for the hydrogenation of CO2. The deactivation of the composite catalyst is influenced by ion exchange of Zn2+ and/or coke, with their effects differing based on the zeolite structure. Separating the grains of the composite catalyst can prevent deactivation.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Laura Proano, Christopher W. Jones
Summary: In this study, NiGa alloy particles supported on CeO2, ZrO2, and ZrO2-CeO2 solid solutions were prepared and characterized. The nature of the support was found to have a significant influence on the catalyst's activity and selectivity, with the crystalline structure of ZrO2 having the greatest impact. Pure ZrO2 showed the highest methanol selectivity and CO2 conversion at high Zr:Ce ratios. In equimolar and Ce-rich conditions, basic sites and oxygen vacancies were found to be the key parameters affecting methanol production.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liyan Zhang, Yinze Yang, Leilei Zhou, Fengyu Zhao, Haiyang Cheng
Summary: 1,6-Hexamethylenediamine was successfully synthesized via the reductive amination of 1,6-hexanediol using a Ru/PRL(x)-Al2O3 catalyst. The highly dispersed and anchored Ru species, formed by 1,10-phenanthroline (PRL), played a crucial role in the catalytic reaction. The formation of new acid-base pairs, electron deficient Ru species, and smaller nanoparticles contributed to the improved catalytic performances of the Ru/PRL-Al2O3 catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Gyorgy Safran, Valeria La Parola, Leonarda Francesca Liotta, Gregor Zerjav, Matevz Roskaric, Albin Pintar
Summary: This study investigates the catalytic and structural changes caused by the addition of 0.25 wt% indium in a 3% Ni/CeO2-Al2O3 catalyst prepared by impregnation method. The results show that the addition of indium can decrease the activity of the catalyst, but it improves its stability and reduces coking.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Ankush Kularkar, Vaibhav Vilas Khedekar, Sachin D. Chaudhari, Mudavath Ravi, Sadhana S. Rayalu, Penumaka Nagababu
Summary: Efficiently addressing the challenges of photocatalytic CO2 reduction to CH3OH is crucial. This study developed Zn-BTC MOF and its composites with CaIn2S4, achieving highly efficient and robust photocatalytic CO2 reduction to CH3OH under ambient conditions, using H2O2 as the hydrogen source. Among the composites, ZMCIS4 demonstrated excellent performance with a CH3OH evolution of 49100 μmol/g.cat and a quantum efficiency of approximately 78.41%. The enhanced performance was attributed to the production of nascent hydrogen atoms (H center dot) through the photo-splitting of H2O2 on the ZMCIS surface.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Dan Liu, Yudong Li, Chengyu Wang, Haiyue Yang, Rong Wang, Shujun Li, Xiaohui Yang
Summary: In this study, a self-supporting three-dimensional porous Co3O4 nanobelt array decorated on nickel foam (P-Co3O4 -NBA@NF) electrode with numerous active sites was successfully constructed for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA). The P-Co3O4 -NBA@NF electrode demonstrated high conversion efficiency, selectivity, and Faraday efficiency, as well as remarkable long-term stability. This research provides a promising electrocatalyst for biomass conversion.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yimin Li, Enggah Kurniawan, Fumiya Sato, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato
Summary: In this study, several silica-alumina catalysts modified with Ag were examined for the dehydration of 1,3-butanediol to 1,3-butadiene. Among them, an amorphous silica-alumina catalyst (SAL-3) modified with Ag showed the highest improvement in catalytic activity and stability when operated in H2 flow. The generation of reversible acid sites was found to be the reason behind the enhanced activity and stability of this Ag/SAL-3 catalyst. The effects of various parameters on the catalytic activity of Ag/SAL-3, such as reaction temperature, contact time, Ag content, and carrier gas, were investigated.
APPLIED CATALYSIS A-GENERAL
(2024)