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
Engineering, Environmental
Haitham M. El-Bery, Hani Nasser Abdelhamid
Summary: Water splitting via photocatalysis using titanium dioxide holds great potential for hydrogen gas generation. In this study, cobalt oxide embedded nitrogen-doped carbon (Co3O4@C) was synthesized using zeolitic imidazolate framework (ZIF-67) as a sacrificial precursor, which showed significant enhancement in photocatalytic performance and hydrogen generation rates when used as a co-catalyst with TiO2. The Co3O4@C/TiO2 system exhibited recyclability for more than four cycles without significant loss of performance, indicating its potential for further exploration in effective photocatalysis.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Yerin Hong, Yongjoon Cho, Eun Min Go, Pankaj Sharma, Hyeonjin Cho, Byongkyu Lee, Sang Myeon Lee, Sung O. Park, Myohwa Ko, Sang Kyu Kwak, Changduk Yang, Ji-Wook Jang
Summary: The study introduced a hydrophobic organic/inorganic photocatalyst that can utilize visible light and suppress H2O2 decomposition, leading to improved H2O2 production efficiency.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Analytical
Xiaoxia Jian, Jing Xu, Yiming Wang, Chenxi Zhao, Zhida Gao, Yan-Yan Song
Summary: The study evaluated a high-performance solid-state ECL H2O2 sensor based on MIL-88B(Fe) nanocrystal-anchored Ti microwires, showing ultrahigh sensitivity, long-term stability, and excellent photocatalytic activity in the visible-light range at the single-cell level. The electrode demonstrated synergistic effects between the TiO2 luminophore and the peroxidase-like activity of MIL-88B(Fe), making it suitable for cytosensing applications.
ANALYTICAL CHEMISTRY
(2021)
Article
Engineering, Chemical
Jie Zhao, Yunning Chen, Renquan Guan, Xueying Cheng, Zhengkai Wu, Nana Zhao, Qingkun Shang, Yingnan Sun
Summary: In this study, the authors successfully prepared two composite photocatalysts, TiO2@PDI-NapSO3H and Fe-TiO2@PDI-NapSO3H, by bonding water-soluble PDI derivatives with TiO2 or iron-doped TiO2. These photocatalysts showed improved performance in degrading phenol and diclofenac sodium (DCF) under visible light. The addition of PDI-NapSO3H enhanced the optical absorption properties of TiO2, while the doping of Fe in TiO2 prevented the recombination of photogenerated carriers. The Fe-TiO2@PDI-NapSO3H exhibited higher photocatalytic activity compared to TiO2@PDI-NapSO3H, with almost 99% degradation of phenol or DCF achieved within 90 or 120 minutes, respectively. The authors also discussed the effects of energy band structure and photogenerated carrier separation efficiency on the photocatalytic performance of Fe-TiO2@PDI-NapSO3H through various analyses. They proposed possible degradation pathways of DCF and explained the reduction of environmental toxicity after photocatalytic degradation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Applied
Jing Liu, Gary Hodes, Junqing Yan, Shengzhong (Frank) Liu
Summary: The study introduced work function engineering by doping 3d metals into Mo2C to modulate the Fermi energy level, which enhanced the efficiency of the neutral hydrogen evolution reaction and improved photocatalytic efficiency. The modified work function also led to enhanced carrier transition and lowered Schottky barrier, ultimately improving the electrocatalytic performance.
CHINESE JOURNAL OF CATALYSIS
(2021)
Article
Green & Sustainable Science & Technology
Xuan-xuan Zhang, Ying-guan Xiao, Shun-sheng Cao, Zheng-liang Yin, Zhao-Qing Liu
Summary: A new confined ternary photocatalyst TiO2@Bi2O3@TiO2 was designed by embedding Bi2O3 into hierarchical hollow TiO2 spheres. This photocatalyst exhibited strong visible-light absorption and efficient charge separation, enabling the complete degradation of tetracycline under visible light. The introduction of confinement effect significantly improved the cyclic stability of the catalyst.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Jie Li, Yuxiang Yang, Zhiyong Han, Yan Huang, Hongming Yuan, Chaoying Ni
Summary: In this paper, Fe-Ce bimetallic-doped composites were synthesized using SiO2 aerogel as a carrier for the adsorption and degradation of trinitrogen from industrial or domestic wastewater. The photocatalytic efficiency was found to be the best when the catalyst dosage was 0.01 g, pH value was 11.0, and the concentration of H2O2 was 80 mmol/L, with the degradation efficiency of trinitrogen remaining above 70%.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Karol Cwieka, Zuzanna Bojarska, Kamil Czelej, Dariusz Lomot, Przemyslaw Dziegielewski, Alexey Maximenko, Kostiantyn Nikiforow, Leon Grado, Ming-Yu Qi, Yi-Jun Xu, Juan Carlos Colmenares
Summary: In this study, atomically dispersed Cu on TiO2 composite nanoparticles synthesized by the wet impregnation method were shown to be highly active and selective in hydrogen production by photoreforming of methanol. The photocatalyst exhibited a significant quantum efficiency and clean and sustainable characteristics.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Tao Liu, Aori Qileng, Nuermaimaitijiang Wubulikasimu, Zhixiong Liu, Weipeng Liu, Yingju Liu
Summary: In this study, Fe-N co-doped TiO2 heterojunction photocatalysts were successfully synthesized, which exhibited multiple rutile/anatase TiO2 heterojunction structure, low bandgap, and significant absorption in visible light. The doped N from the TiO2-based metal organic framework (MOF) provided Ti-O-Fe tetrahedra and more oxygen vacancies, improving the photocatalytic efficiency of CO2 reduction to CH4.
Review
Materials Science, Multidisciplinary
Shuang Tian, Yuxiao Feng, Ziye Zheng, Zuoli He
Summary: In order to address environmental pollution and energy shortage issues, titanium dioxide (TiO2)-based photocatalysts have been widely used as an efficient technology for pollution removal and fuel production in the field of photocatalysis. In practical applications, TiO2-based photocatalysts are usually prepared on various substrates to separate the catalyst from water and improve photocatalytic stability. This review focuses on the research progress of TiO2-based heterogeneous photocatalytic coatings deposited on glass substrates with various deposition techniques, demonstrating excellent performance in self-cleaning, pollution removal, air purification, and antibiosis.
Article
Materials Science, Ceramics
Wenjing Shen, Nan Li, Shixiang Zuo, Mianmian Wu, Guifang Sun, Qingfei Li, Minghao Shi, Jiangquan Ma
Summary: This study reports a Bi2WO6/Black TiO2 heterojunction with a high piezo-photocatalytic activity. The results show that this heterojunction has a higher degradation efficiency for cationic and anionic dyes under simultaneous ultrasonication and sunlight, compared to independent photocatalysis and piezocatalysis. The study also provides evidence for the Z-scheme piezophotocatalytic mechanism of the Bi2WO6/B-TiO2 heterojunction.
CERAMICS INTERNATIONAL
(2022)
Article
Environmental Sciences
Li-qiang Qi, Zhe Yu, Qi-hao Chen, Jing-xin Li, Hao-bo Xue, Feng Liu
Summary: This paper proposed a hybrid system that combined dielectric barrier discharge plasma with catalysis for toluene degradation. Photocatalysts TiO2 doped with Mn and Fe were used to improve the performance of the system. The effects of doping ratio, electric field intensity, AC frequency, gas flow rate, and initial concentration on toluene degradation efficiency, ozone decomposition capacity, and COx selectivity were investigated. The best doping ratios were found to be 1.0% for both Mn and Fe, and increasing electric field intensity significantly improved the synergism of the system.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Marcos Gonzalez-Tejero, Joyce G. Villachica-Llamosas, Alba Ruiz-Aguirre, Gerardo Colon
Summary: Cu/TiO2/SrTiO3 hybrid structures were synthesized by impregnation method from Cu/TiO2 and SrTiO3 systems. The composites effectively covered SrTiO3 with Cu/TiO2, leading to an outstanding improvement of photoactivity for hydrogen production from methanol photoreforming. The optimal 30wt% SrTiO3 heterojunction achieved a photoproduction of 81.7 mmol/g H2 after 6 hours, 1.7 times higher than bare Cu/TiO2.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Environmental Sciences
Manjiri A. Mahadadalkar, NaHyun Park, Mohammad Yusuf, Saravanan Nagappan, Muthuchamy Nallal, Kang Hyun Park
Summary: Water pollution caused by industrial wastewater is a critical environmental problem. Synthetic dyes used in various industries have complex composition, high toxicity, and low biodegradability, causing negative impacts on ecosystems. To address this issue, TiO2 fibers photocatalyst doped with Fe was synthesized using sol-gel and electrospinning techniques for the degradation of dyes. The fabricated fibers showed excellent photocatalytic degradation activity, with 99% degradation of rhodamine B in 120 minutes. The fibers also demonstrated good photocatalytic activity even after 5 cycles of reuse.
Article
Chemistry, Physical
Antoni Waldemar Morawski, Katarzyna Cmielewska, Kordian Witkowski, Ewelina Kusiak-Nejman, Iwona Pelech, Piotr Staciwa, Ewa Ekiert, Daniel Sibera, Agnieszka Wanag, Marcin Gano, Urszula Narkiewicz
Summary: A new photocatalyst for CO2 reduction has been developed, which shows high CO2 adsorption capacity and selectivity towards CO. The use of this photocatalyst eliminates the need for separating CO from the gas mixture after the reaction.
Article
Biochemistry & Molecular Biology
Paulina Rokicka-Konieczna, Agata Markowska-Szczupak, Ewelina Kusiak-Nejman, Antoni W. Morawski
Summary: This study presents the characteristics of saccharose-modified TiO2 photocatalysts obtained through a low-temperature hydrothermal method. The influence of these photocatalysts on the survivability and enzyme activity of Escherichia coli and Staphylococcus epidermidis under UV-A and artificial solar light was examined. The TiO2-1%-S-100 photocatalysts were capable of achieving complete inactivation of the bacteria under artificial solar light irradiation in less than 1 hour. The study also discusses the impacts of sugars on the photocatalytic activity and disinfection performance.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Physical
Nikos Guskos, Grzegorz Zolnierkiewicz, Ewelina Kusiak-Nejman, Aleksander Guskos, Konstantinos Aidinis, Marta Bobrowska, Pawel Berczynski, Agnieszka Wanag, Iwona Pelech, Urszula Narkiewicz, Antoni W. Morawski
Summary: Nanocomposites based on nanocrystalline titania modified with graphene-related materials showed the presence of magnetic agglomerates. The magnetic resonance spectra parameters depended strongly on the materials' modification processes. Reduction of graphene oxide increased the number of magnetic moments and caused changes in reorientation and relaxation processes. At room temperature, wide resonance lines dominated in all studied nanocomposites, with narrow resonance lines derived from conduction electrons in some cases. Some nanocomposites exhibited single domain magnetic (ferromagnetic) arrangement, while others showed magnetic anisotropy. In addition, EPR spectra of free radicals were observed for all samples at 4K. Magnetic resonance imaging methods can capture even small number of localized magnetic moments, significantly affecting the physicochemical properties of the materials.
Article
Chemistry, Multidisciplinary
Antoni W. Morawski, Ewelina Kusiak-Nejman, Iwona Pelech, Katarzyna Cmielewska, Daniel Sibera, Piotr Staciwa, Agnieszka Wanag, Marcin Gano, Ewa Ekiert, Joanna Kapica-Kozar, Kordian Witkowski, Urszula Narkiewicz
Summary: This paper describes a new approach for hydrogen production from water using carbon dioxide-mediated water decomposition under UV radiation. By saturating the water solution with dissolved sodium hydroxide and gaseous carbon dioxide, the formed bicarbonate and carbonate ions prevent the recombination of hydroxyl and hydrogen radicals, leading to the prioritized formation of hydrogen gas. In the best system, the hydrogen production reached 0.6 μmol/h during 24 hours of UV-C radiation.
Article
Engineering, Environmental
A. W. Morawski, K. Cmielewska, E. Ekiert, E. Kusiak-Nejman, I. Pelech, P. Staciwa, D. Sibera, A. Wanag, J. Kapica-Kozar, M. Gano, Z. Lendzion-Bielun, U. Narkiewicz
Summary: This study presents a photocatalytic process for synthesizing ammonia from nitrogen and hydrogen derived from water vapor under mild conditions. By using a gas-phase photocatalytic reactor with a bed made of a UV transparent glass fiber cloth coated with AEROXIDE (R) P25 TiO2, ammonia can be easily absorbed and separated from the gas phase, thus shifting the ammonia synthesis equilibrium towards the product.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Biochemistry & Molecular Biology
Iwona Pelech, Ewelina Kusiak-Nejman, Piotr Staciwa, Daniel Sibera, Joanna Kapica-Kozar, Agnieszka Wanag, Filip Latzke, Karolina Pawlowska, Adrianna Michalska, Urszula Narkiewicz, Antoni W. Morawski
Summary: This study aimed to obtain hybrid composites based on photoactive metal oxide and carbon with adsorption properties. The results showed that increasing the carbon sphere content in the nanocomposites resulted in a broader combustion temperature range, and the addition of oxides to carbon spheres improved their adsorption properties.
Review
Energy & Fuels
K. Machaj, J. Kupecki, Z. Malecha, A. W. Morawski, M. Skrzypkiewicz, M. Stanclik, M. Chorowski
Summary: This review examines the opportunities and challenges facing the maritime sector in light of the game-changing goals set by the International Maritime Organization (IMO). It discusses the feasibility of renewable energy sources, such as green hydrogen and ammonia, and their use as marine fuel. The impact of emission regulations and the challenges of using ammonia on ships are also considered. Additionally, a technical justification for using solid oxide fuel cells is presented.
ENERGY STRATEGY REVIEWS
(2022)
Article
Biotechnology & Applied Microbiology
Sylwia Mozia, Revathy Rajakumaran, Kacper Szymanski, Marek Gryta
Summary: The study focuses on the treatment of contaminated water using a hybrid system combining advanced oxidation processes and membrane technology. The results showed that increasing the feed temperature improved the permeate flux and degradation efficiency, while aeration of the feed enhanced product quality. The system exhibited good stability and produced high-quality permeate during long-term operation.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Environmental Sciences
Agnieszka Wanag, Joanna Kapica-Kozar, Agnieszka Sienkiewicz, Paulina Rokicka-Konieczna, Ewelina Kusiak-Nejman, Antoni W. Morawski
Summary: This study presents the impact of TiO2 properties on the CO2 adsorption properties of TiO2 modified with APTES. The APTES-modified TiO2 materials were prepared by solvothermal process and thermal modification. The results showed that APTES modification is an efficient method for preparing CO2 sorbents with higher adsorption capacity and excellent cyclic stability.
Article
Chemistry, Physical
Aleksandra Babyszko, Agnieszka Wanag, Ewelina Kusiak-Nejman, Antoni Waldemar Morawski
Summary: This paper investigates the effects of fumed silica modification and calcination temperature on the physicochemical properties and activity of photocatalysts under UV-VIS and VIS light. The materials were synthesized using titanium tetraisopropoxide hydrolysis and subsequent calcination. Various analytical techniques were used to characterize the nanomaterials. It was found that SiO2 modification inhibited phase transformation and crystal growth during calcination. The photocatalytic activity was enhanced by SiO2 addition and calcination, with the highest activity observed for the SiO2(11.1%)/TiO2_600 photocatalyst.
Article
Chemistry, Physical
Ewelina Kusiak-Nejman, Katarzyna Cmielewska, Agnieszka Wanag, Ewa Ekiert, Iwona Pelech, Urszula Narkiewicz, Antoni W. Morawski
Summary: Industrial TiO2 suspension from sulphate technology was used for samples preparation. One sample was directly calcined in an argon stream at 800 C-o. The second one, before the calcination in the same conditions, was modified with APTES in such a way that the final product contained about 2 wt% of silicon. Photocatalysts were tested in the CO2 reduction reaction containing the addition of gaseous nitrogen and water vapour. No activity was observed in the CO2 reduction reaction for a directly calcined sample that mainly consists of a rutile phase. It was found that the addition of silicon prevents the anatase-to-rutile phase transition by forming a Si-O-Ti chain containing the anatase phase and leads to gaseous products: hydrogen, carbon monoxide and methane, and ammonia. The presence of silicon generates paramagnetic recentres with g= 2.0028, which are associated with oxygen vacancies and delocalized electrons. This electronic structure is critical to the photocatalytic reduction of CO2 because the pure rutile phase (without silicon modification) does not reduce CO2, but only the presence of ammonia was found in the products.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Biochemistry & Molecular Biology
Magdalena Chareza, Katarzyna Przygrodzka, Anna Zywicka, Bartlomiej Grygorcewicz, Peter Sobolewski, Sylwia Mozia, Marcin Smiglak, Radoslaw Drozd
Summary: Bacterial biofilms are a major problem in the wound healing process due to antibiotic resistance mechanisms. This study investigated the therapeutic properties of alginate lyase (AlgL) immobilised on BC membranes for protecting wounds from Pseudomonas aeruginosa infection. The AlgL immobilisation significantly reduced the amount of polysaccharides in the biofilm and showed synergism with gentamicin in killing bacterial cells.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Paulina Rokicka-Konieczna, Agnieszka Wanag, Agnieszka Sienkiewicz, Dylan Shun Izuma, Ewa Ekiert, Ewelina Kusiak-Nejman, Chiaki Terashima, Atsuo Yasumori, Akira Fujishima, Antoni W. W. Morawski
Summary: The antibacterial activity of TiO2 photocatalysts modified by 3-aminopropyltriethoxysilane (APTES) was evaluated against Escherichia coli and Staphylococcus epidermidis under artificial solar light (ASL) irradiation. APTES-functionalized TiO2 samples were prepared through a solvothermal process followed by calcination. The best antibacterial properties were observed in the TiO2-4 h-120 degrees C-300 mM-Ar-300 degrees C sample, which had a positive zeta potential, high surface area, and porous volume.
Article
Chemistry, Physical
Ewelina Kusiak-Nejman, Katarzyna Cmielewska, Iwona Pelech, Ewa Ekiert, Piotr Staciwa, Daniel Sibera, Agnieszka Wanag, Joanna Kapica-Kozar, Marcin Gano, Urszula Narkiewicz, Antoni W. Morawski
Summary: This study presents new photocatalysts obtained by treating carbon spheres and TiO2 in a microwave reactor at high pressure and temperature, and depositing them on glass fibre cloths. These photocatalysts showed high CO2-adsorption and photoactivity in simultaneous water-splitting process, generating H-2, reducing CO2 to CO and CH2, and reducing N-2 to NH3. The addition of carbon spheres maintained a high selectivity of nitrogen fixation.
Article
Chemistry, Physical
Antoni W. Morawski, Marcin Gano, Katarzyna Cmielewska, Ewelina Kusiak-Nejman, Iwona Pelech, Piotr Staciwa, Ewa Ekiert, Urszula Narkiewicz
Summary: In the face of increasing global carbon dioxide emissions and the urgent need to mitigate climate change, the development of efficient and sustainable strategies for CO2 conversion has gained significant attention. This paper uses ZnO as a photocatalyst to investigate its efficiency in the photoreduction of CO2 in a gas-phase system. The study found that the particle size of ZnO has a significant impact on the process efficiency, with the smallest particle size (18 nm) showing the most effective catalytic activity for CO2 photoreduction.
