Review
Chemistry, Multidisciplinary
Zhipeng Su, Tiehong Chen
Summary: This review summarizes the recent progress in strategies for preparing porous noble metals, including innovation in new methods and deeper understanding of traditional methods. It also discusses the relationship between the structure of porous noble metals and electrocatalytic performance, such as the accessibility of active sites, connectivity of skeleton structures, channel dimensions, and hierarchical structures.
Article
Chemistry, Physical
Haisheng Huang, Juan Wang, Qi Kong, Yao Xu, Zhishun Wei, Ying Chang
Summary: Anatase TiO2 hierarchically structured microspheres with co-exposed {001}/{101} facets were prepared by a facile one-pot hydrothermal method. The morphology and crystallization of the microspheres were systematically investigated under different reaction temperatures, and it was found that the microspheres exhibited better properties at a temperature of 160°C. Modification of the microspheres with different noble metals (Au, Ag, Cu, Pt, Pd) resulted in significantly enhanced photocatalytic activities, with the Pt-modified sample (TPt) showing the highest activity in the degradation of tetracycline hydrochloride and hydrogen production.
Article
Chemistry, Physical
Kinga Skalska, Anna Malankowska, Jacek Balcerzak, Maria Gazda, Grzegorz Nowaczyk, Stefan Jurga, Adriana Zaleska-Medynska
Summary: The activity enhancement effect of noble metal deposited on TiO2 in photocatalytic nitrogen oxides oxidation was compared. It was found that the decoration of noble metal can effectively improve the activity of photocatalytic nitrogen oxide oxidation, with Au0.5 catalyst showing the best NOx removal effect.
Article
Biochemistry & Molecular Biology
Guangyuan Yao, Yuqiang Liu, Jingcai Liu, Ya Xu
Summary: The porous graphitic carbon nitride prepared via pyrolysis method exhibited enhanced visible-light-driven photocatalytic performance compared to homogeneous g-C3N4. This improvement was attributed to the porous structure enhancing light capture and mass transfer ability.
Article
Chemistry, Applied
Yingkun Song, Min Jiang, Lijuan Zhou, Hongsheng Yang, Jianming Zhang
Summary: In this study, CNC/manganese dioxide/titanium dioxide porous microspheres were prepared and demonstrated high degradation efficiency and adsorption performance in wastewater treatment. The synergistic effect of two transition metal oxides enabled the porous microspheres to achieve a degradation efficiency of 97.0% for methylene blue, with easy recovery and rapid regeneration. Furthermore, the maximum removal of dyes by this material reached up to 310.2 mg/g, significantly higher than most CNC-based adsorption materials.
CARBOHYDRATE POLYMERS
(2022)
Review
Chemistry, Multidisciplinary
Lizhi Sun, Hao Lv, Ji Feng, Olga Guselnikova, Yanzhi Wang, Yusuke Yamauchi, Ben Liu
Summary: As second-generation mesoporous materials, mesoporous noble metals (NMs) have wide applications in catalysis, sensing, bioimaging, and biotherapy. This review summarizes recent progress in the design, synthesis, and catalytic applications of NM-based hollow mesoporous nanoparticles (HMNs), including five main synthesis strategies. The applications in ethanol oxidation electrocatalysis and hydrogenation reactions are discussed, highlighting the high activity, enhanced stability, and optimal selectivity of NM-based HMNs in (electro)catalysis. Prospects for further research directions are also provided.
ADVANCED MATERIALS
(2022)
Article
Polymer Science
Wei Song, Qingzhu Zhang, Yuxin Guan, Wanyan Li, Siyu Xie, Jin Tong, Mo Li, Lili Ren
Summary: Porous chitosan/saccharomycetes adsorption microspheres were successfully prepared and characterized in terms of morphology, molecular interaction, and crystallization property. The microspheres showed potential in removing preservatives, pigments, and other additives in food. The surface roughness of microspheres could be improved by increasing the mass ratio of saccharomycetes, while the microsphere structure became more compact with the increase of silica gels.
Article
Chemistry, Multidisciplinary
Xin Geng, Shuwei Li, Jaeyoung Heo, Yi Peng, Wenhui Hu, Yanchao Liu, Jier Huang, Yang Ren, Dongsheng Li, Liang Zhang, Long Luo
Summary: This comprehensive study focuses on the synthesis, characterization, and reactivity of grain-boundary-rich noble metal nanoparticle assemblies. A scalable synthesis method for Pt, Pd, Au, Ag, and Rh nanoparticle assemblies is developed, where the nanoparticles are mainly connected via sigma 3 (111) twin grain boundaries. The presence of localized tensile strain at the grain boundary sites results in the ultrahigh catalytic activity of the Pt nanoparticle assembly, making it suitable for room-temperature catalytic hydrogen sensing.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Qiang Gao, Liang Jia, Aiqin Zhang, Li Wang, Hao Peng, Wenkai Wang, Shenglin Zhou, Jun Xiang, Yi Chen, Haojun Fan
Summary: A type of porous polyurea microspheres for matting coating were prepared by precipitation polymerization, and the factors affecting the surface porosity and roughness were investigated. The results showed that polyvinylpyrrolidone played an important role in controlling the surface porosity, and adding porous polyurea microspheres significantly reduced the gloss of the coating.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Jiaqi Sun, Senshen Yu, Ziheng Cui, Lin Hu, Bowen Sun, Biqiang Chen
Summary: In this study, Ce-doped TiO2 porous microspheres with excellent photocatalytic antibacterial performance were prepared using pine pollen as a template. The reactive oxygen species generated by photocatalysis attacked bacteria, leading to effective sterilization of various pathogens.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Ceramics
Ren Guo, Congcong Rong, Song Chen, Jianan Zhang, Akiyoshi Osaka, Toshiyuki Ikoma, Xiaona Li, Weiyi Chen
Summary: In this study, chitosan/Fe3O4/TiO2@TiO2 nanowire microspheres with extracellular matrix-like fibrous surface and photothermal antibacterial property were synthesized. The microspheres significantly enhanced the attachment and proliferation of human umbilical vein endothelial cells and exhibited photothermal antibacterial activity due to the presence of nanofibrous surface and Fe3O4 component.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Engineering, Environmental
L. Cano-Casanova, A. Amoros-Perez, M. Ouzzine, M. C. Roman-Martinez, M. A. Lillo-Rodenas
Summary: TiO2-C photocatalysts were prepared by hydrothermal synthesis using titanium tetraisopropoxide, saccharose and HCl of variable concentration. The TiO2-C photocatalysts have textural properties similar to those of analogous bare TiO2 samples, but different crystalline phase composition; they only contain anatase instead of an anatase-brookite-rutile mixture in bare TiO2. This reveals that carbon contributes to the stabilization of anatase. Also, the presence of carbon has shown to favor the spherical morphology. The TiO2-C photocatalysts are more active than analogous bare TiO2 ones and P-25. The most efficient TiO2-C photocatalysts are those prepared with lower HCl concentration solutions, 0.5 and 0.8 M, which present higher surface area and lower density of hydroxyl surface groups. Carbon, about 0.3-0.7 wt%, seems to be (partially) incorporated into the TiO2 lattice and it likely leads to low electron-hole recombination rate and to emission processes that could contribute to explain the good activity of the TiO2-C samples.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Ghulam Asghar, Xue Dong, Sudong Chae, Shahid Saqlain, Seungbae Oh, Kyung Hwan Choi, Jiho Jeon, Chaeheon Woo, Tae Yeong Kim, Jungyoon Ahn, Hyung-Suk Oh, Jae-Hyuk Park, Hak Ki Yu, Jae-Young Choi
Summary: Ultraviolet radiation poses serious health risks, leading to an urgent need for more effective and safer UV filters. In this study, titanium dioxide nanoparticles were successfully embedded in silica microspheres, resulting in a new material with excellent UV protection abilities.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Physical
Yongfang Niu, Huaigang Su, Xuelian Li, Jing Li, Yanxing Qi
Summary: Transition metal oxide α-MoO3 microspheres were synthesized with the aid of CrCl(3·6H2O) via a facile hydrothermal reaction and subsequent annealing treatment. The presence of CrCl(3·6H2O) played a crucial role in manipulating the morphology and increasing the specific surface area of the synthesized products. The annealing treatment transformed the crystal structure from metastable hexagonal MoO3 to stable orthogonal MoO3, resulting in improved electron storage. The α-MoO3 microspheres demonstrated excellent specific capacitance and showed promise as electrode materials for supercapacitors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Fan Fu, Yufan Zhang, Yan Zhang, Yuyue Chen
Summary: In this experiment, Mn@TiO2 nanofibers were fabricated and their enhanced photocatalytic activity with added manganese ion was observed. The degradation efficiency under ultraviolet light significantly increased and potential applications in capacitors were explored.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Aleksandra Mielewczyk-Gryn, Sebastian Wachowski, Kacper Dzierzgowski, Iga Szpunar, Judyta Strychalska-Nowak, Tomasz Klimczuk, Miroslaw Sawczak, Maria Gazda
Summary: LaNb0.8M0.2O4-delta (M=As, Sb, V, and Ta) oxides with different ionic sizes were synthesized and their vibrational properties were investigated. The study found that the substituent element affects both the Debye temperature value and the Raman active vibrational modes. Additionally, a phase transition was observed at a lower temperature (260 K) for LaNb0.8Sb0.2O4-delta compared to previous reports.
Article
Chemistry, Physical
Silvia Mauri, Gianluca D'Olimpio, Corneliu Ghica, Luca Braglia, Chia-Nung Kuo, Marian Cosmin Istrate, Chin Shan Lue, Luca Ottaviano, Tomasz Klimczuk, Danil W. Boukhvalov, Antonio Politano, Piero Torelli
Summary: This study investigates the surface reactivity of a Ni3Sn4 catalyst operating at 250 degrees C for hydrogen production from methanol decomposition. It is found that the catalytic reaction is driven by surface tin-oxide phases, which enhance catalyst durability and H2 selectivity. These findings provide new perspectives for the development of scalable and low-cost catalysts.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Agnieszka Sulowska, Agnieszka Fiszka Borzyszkowska, Karolina Cysewska, Katarzyna Siwinska-Ciesielczyk, Konstantin Nikiforow, Grzegorz Trykowski, Anna Zielinska-Jurek
Summary: This study focuses on the use of organic-inorganic hybrid materials for photocatalytic removal of heavy metals from water. The researchers investigated the effect of the morphology of poly (3,4-ethylenedioxythiophene) (PEDOT) on the adsorption and photoreduction of Cr(VI) to Cr(III) under simulated solar light and visible light. They synthesized titanium (IV) oxide/PEDOT composites with different morphologies using a water-in-oil microemulsion method. The composite with PEDOT microvesicular morphology showed the highest efficiency of Cr(VI) photoreduction to Cr(III) and improved photocatalytic activity under visible light irradiation.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
S. Kazim, D. Mastrippolito, P. Moras, M. Jugovac, T. Klimczuk, M. Ali, L. Ottaviano, R. Gunnella
Summary: We investigated the challenging CrCl3 surface using photon energy dependent photoemission (PE). By studying the core and valence electrons of cleaved single crystals in either ultra-high vacuum (UHV) or air, we confirmed the atomic composition with respect to the expected bulk atomic structure. The presence of a stable, but only partially ordered Cl-O-Cr surface was revealed by a common spectroscopic denominator. Through analysis of multiplet components, we quantified the electron charge transfer and the reduced crystal field due to the established polarization field. The methodology used in this study can have a significant impact on determining the structure of ordered sub-oxide phases in mono or bi-layer Cr trihalides.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Alex H. Mayo, Hidefumi Takahashi, Shintaro Ishiwata, Karolina Gornicka, Jan Jaroszynski, Robert J. Cava, Weiwei Xie, Tomasz Klimczuk, Michali Winiarski
Summary: Research on magnetoresistance (MR) in nonmagnetic materials is an active area in materials science. High-mobility semimetals in single-crystalline form have been the focus for giant, positive MR. This study reports the observation of a very large positive MR in polycrystalline metallic Pt5P2, showing the significance of crystallinity and purity of samples for MR optimization.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Engineering, Environmental
Marta Gmurek, Johannes Alexander, Pawel Mazierski, Magdalena Miody, Maciej Fronczak, Tomasz Klimczuk, Adriana Zaleska-Medynska, Harald Horn, Thomas Schwartz
Summary: The study aimed to reduce facultative pathogenic bacteria and antibiotic resistance genes from secondary effluent. The efficiency of various processes in removing antibiotic resistance genes was evaluated. The study investigated the removal of selected antibiotic resistance genes, bacterial regrowth potential, and the removal of total genomic DNA content using TiO2-CuPd photocatalysts under visible light radiation. The highest removal efficiency for most targets was achieved with TiO2-CuPd/VIS. Photocatalytic ozonation with TiO2-CuPd showed significant removal of facultative pathogenic bacteria and antibiotic resistance genes. Photocatalytic ozonation has great potential for eliminating antibiotic resistance genes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Weronika Brzozowska, Izabela Wojtczak, Viorica Railean, Zhanar Bekissanova, Grzegorz Trykowski, Boguslaw Buszewski, Myroslav Sprynskyy
Summary: This research focuses on utilizing unicellular algae (diatoms) to synthesize AgNPs/TiO(2)NPs/DBP hybrid composites, and characterizes their elemental and mineral composition, structure, morphology, and photoluminescent properties using various techniques. The study reveals the epitaxial growth of Ag/TiO2 nanoparticles on the surface of pyrolyzed diatom cells. Furthermore, the antimicrobial potential of the composites is evaluated using the minimum inhibitory concentration (MIC) method.
Article
Materials Science, Multidisciplinary
Tomasz Klimczuk, Szymon Krolak, Robert J. Cava
Summary: The electronic properties of bulk Ta-Hf and Ta-Zr body centered cubic alloys, which are potential candidates for superconducting qbits, were investigated. The alloys showed type II strong coupling superconductivity, while elemental Ta showed type I superconductivity. The increase in superconducting transition temperature (Tc) observed in the alloys could not be solely explained by the increase in the density of electronic states at the Fermi level caused by decreasing the electron count per atom.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Chemistry, Physical
Mateusz A. Baluk, Pawel Mazierski, Aleksandra Pieczynska, Kostiantyn Nikiforow, Grzegorz Trykowski, Tomasz Klimczuk, Adriana Zaleska-Medynska
Summary: Various metal-organic framework (MOF)/TiO2 heterostructures can be obtained by adjusting the hydrolysis and calcination steps of Ti-based MOFs. Modification of the composition with metal nanoparticles can significantly increase the efficiency of hydrogen photogeneration and the photodegradation of phenol. These improvements are related to the excitation of MOFs and TiO2, electron transfer, electron accumulation on nanoparticles, and the generation of reactive oxygen species.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Proceedings Paper
Physics, Applied
Frank Elson, Debarchan Das, Gediminas Simutis, Ola Kenji Forslund, Ugne Miniotaite, Rasmus Palm, Yasmine Sassa, Jonas Weissenrieder, Martin Mansson
Summary: For quantum systems or materials, tuning electronic/magnetic properties using external parameters is a common approach for studying their behavior. However, in Muon Spin Rotation/Relaxation experiments, the use of a pressure cell as an external stimulus can result in a higher background signal. To tackle this issue, we have developed a simulation tool called pySRIM to calculate the stopping fractions of muons in both the sample and the pressure cell.
15TH INTERNATIONAL CONFERENCE ON MUON SPIN ROTATION, RELAXATION AND RESONANCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Jakub Sowik, Pawel Mazierski, Tomasz Klimczuk, Kostiantyn Nikiforow, Anna Malankowska, Adriana Zaleska-Medynska
Summary: In this paper, CuxO microstructures were successfully fabricated via the electrochemical method with long, regular and well-packed CuO microwires. The effects of applied potential, sodium fluoride content, and calcination conditions on the morphology, phase composition, optical and photoelectrochemical properties were investigated. The highest photocurrent response was achieved for the sample with 0.35% sodium fluoride content, 10V applied potential, 400 degrees C calcination temperature, and 60 minutes calcination time. The mechanism of photocurrent generation in the presence of CuxO/Cu under UV-Vis irradiation was proposed.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
