Article
Engineering, Environmental
Yoonkyung Lee, Teayoep Kim, Bumsoo Kim, Sun Choi, Kyunghoon Kim
Summary: In this study, we synthesized amorphous MoSx (a-MoSx) and Ag on TiO2 to improve the removal of photocatalytic organic pollutants. The TiO2/a-MoSx/Ag (TMA) photocatalyst showed significantly enhanced degradation performance of methylene blue compared to TiO2 photocatalyst. Moreover, by coating the TMA photocatalyst on an ultrafiltration (UF) membrane using polydopamine (PDA), fouling of the membrane was successfully mitigated, resulting in increased hydrophilicity and improved flux recovery ratio.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Applied
Juan Carlos Escamilla-Mejia, Jesus Hidalgo-Carrillo, Juan Martin-Gomez, Francisco J. Lopez-Tenllado, Rafael C. Estevez-Toledano, Alberto Marinas, Francisco J. Urbano
Summary: Platinum was incorporated onto titania-mesoporous carbon composite and tested for glycerol photoreforming. The high surface area of the mesoporous carbon promoted the dispersion of titania, while photodeposition led to preferential incorporation of platinum onto titania. The Pt/TiO2-MCH catalyst, with 18.4 wt% titania and 1.3 wt% platinum, showed a hydrogen production three times higher than the Pt/TiO2 catalyst after 12 hours.
Article
Materials Science, Multidisciplinary
Lianqing Yu, Xiaomeng Ji, Xingyu Zhao, Yaping Zhang, Haifeng Zhu
Summary: A TiO2/NiOOH composite sensor was prepared to monitor the concentration of glucose. The composite showed enhanced photoelectrochemical properties due to the synergistic effect of Ag and NiOOH, with a sensitivity of 2490 μA cm(-2) mM(-1) and a low detection limit of 0.44 μM.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
Haocheng Wu, Yuanbo Song, Yidan Liu, Guoli Chen, Mengmeng Zhang, Rongrong Jia, Yun Ling, Yili Shi, Xiang Wang, Lei Huang
Summary: By increasing the irradiation intensity, the interaction between Pt and TiO2 is strengthened, resulting in enhanced activity for HCHO oxidation. The balanced electronic and spatial structure promote the activation of oxygen species, facilitating both the conversion of dioxymethylene to HCOO- and the subsequent decomposition of HCOO-.
JOURNAL OF CATALYSIS
(2023)
Article
Environmental Sciences
Liming Wang, Mengyao Li, Liang Pei, Tingting Liu, Tian Zhang, Dong Ao
Summary: In this study, Pt-N co-modified TiO2 nanotube electrodes were created using photodeposition and plasma. The electrodes were characterized using various techniques, and the results showed that the Pt-N co-modified TiO2 electrodes exhibited excellent photoelectrocatalytic activity and conductivity, making them suitable for oxytetracycline degradation in wastewater.
Article
Engineering, Electrical & Electronic
Mohamad Mohsen Momeni, Parisa Zeinali
Summary: A combined technique of electrochemical anodization and ultraviolet light-assisted photochemical preparation was used to prepare Cu/TiO2, Ag/TiO2, Cu@Ag/TiO2, and Ag@Cu/TiO2 nanotubes. XRD, SEM with EDS, and UV-Vis absorption spectroscopy were employed to characterize the crystalline phase, morphology, and optical absorption properties of the samples. The results showed that the morphology and photoelectrochemical properties of the prepared nanotubes were influenced by the deposition sequence of particles, with TiO2 nanotubes enhancing light absorption and photoelectrochemical properties.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Applied
M. Carmen Herrera-Beurnio, Francisco J. Lopez-Tenllado, Jesus Hidalgo-Carrillo, Juan Martin-Gomez, Rafael Estevez, Miguel Castillo-Rodriguez, Gustavo de Miguel, Francisco J. Urbano, Alberto Marinas
Summary: Platinum was deposited on g-C3N4-TiO2 systems using UV or Vis light, and the resulting particle size and distribution were influenced by the absorption properties of the semiconductors. Smaller platinum particles were obtained on g-C3N4 under visible light and on TiO2 under UV radiation. The preferential deposition of platinum on g-C3N4 or TiO2 was observed, especially in physical mixtures of both semiconductors, depending on the radiation source. The solids showed enhanced hydrogen photoproduction activity under visible light, compared to physical mixtures or simultaneous incorporation of platinum.
Article
Chemistry, Physical
A. Yu. Fedorov, A. V. Bukhtiyarov, M. A. Panafidin, I. P. Prosvirin, Y. V. Zubavichus, V. I. Bukhtiyarov
Summary: The intentional tailoring of surface structure in bimetallic nanoparticles, especially those containing bulk-immiscible metals like Pt and Ag, has attracted great interest in academic research and industry. However, our investigation on the Ag-Pt/HOPG bimetallic system reveals that while partial alloying of Ag and Pt occurs at the preparation stage, thermal annealing does not further enhance the alloying degree due to surface segregation of silver. Increasing the annealing temperatures leads to structure ruins and even partial phase separation. These findings highlight the limited alloying capability of Pt and Ag at the nanoscale, which should be considered for the design and functioning of bimetallic catalysts.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Yuanbo Song, Hongyun Du, Haocheng Wu, Liyi Shi, Dongqi Yu, Rongrong Jia, Chirawat Chitpakdee, Supawadee Namuangruk, Lei Huang
Summary: A new method was developed to fabricate highly dispersed dual Au-Pt alloy on TiO2, showing excellent catalytic oxidation performance for HCHO. The alloyed Au-Pt facilitates oxygen adsorption and dissociation, promoting rapid oxidation of formaldehyde with reduced reaction barrier.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Weijian Gao, Caixia Kan, Shanlin Ke, Qinru Yun, Xingzhong Zhu, Xiaoguang Zhu
Summary: In this study, a novel Au-Pt@TiO2 nanocomposite was synthesized, featuring strong localized electric field enhancement and energy transfer to facilitate carrier separation, resulting in improved photocatalytic performance and durability. The nanoboxes with nanocavities effectively manage the usage of localized energy and provide space for reaction, making it a promising candidate in pollutant degradation and chemical reaction catalysis.
NANOSCALE ADVANCES
(2021)
Article
Nanoscience & Nanotechnology
Shubham Biswas, Ha-Young Lee, Manohar Prasad, Abhishek Sharma, Jong-Sung Yu, Siddhartha Sengupta, Devendra Deo Pathak, Apurba Sinhamahapatra
Summary: This study presents a new approach to photoassisted hydrogen generation using a Ni-based cocatalyst with a small amount of Pt, which exhibits better charge separation efficiency and hydrogen generation rate compared to a Pt-only cocatalyst in the photodegradation of methanol-water.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Juan Carlos Escamilla-Mejia, Jesus Hidalgo-Carrillo, Juan Martin-Gomez, Francisco J. Lopez-Tenllado, Rafael Estevez, Alberto Marinas, Francisco J. Urbano
Summary: This study synthesized biochars from olive stones and used them as supports for TiO2 and Pt. The results showed that the photocatalyst with a mesoporous structure and small particle size had better hydrogen production. The activity of Pt/TiO2-PyCF was almost 4 times higher than that of Pt/TiO2, indicating the positive effect of a well-dispersed TiO2 phase on a carbonaceous support.
Article
Chemistry, Physical
Meng Wang, Simin Li, Xiongkai Tang, Dongjie Zuo, Yanyuan Jia, Shuo Guo, Zong-Jie Guan, Hui Shen
Summary: This study reports the one-step synthesis of Pt/Ag alloy nanoclusters that exhibit high catalytic activity in the cycloaddition reactions of CO2 and epoxides. The molecular structure of the nanoclusters is protected by the shell of phosphine ligands and halides. The research is important for studying structure-performance relationships and the reaction mechanism of heterogeneous metal catalysts.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Priyanka Midya, Pooja P. Sarngan, Abhijit Dutta, Kalyan Kumar Chattopadhyay, Debabrata Sarkar
Summary: A multifunctional critical nano-composite material, Carbon-modified Ag@TiO2 nanourchin, was synthesized to investigate its visible light photocatalytic activity. The carbon-modified nanourchin was prepared by a two-step chemical synthesis method. The existence of both carbon and silver nanoparticles on the TiO2 nanostructure enhanced the visible light photocatalytic activity. The experimental results showed that the carbon-modified nanourchin exhibited higher photocatalytic efficiency compared to pure TiO2 nanourchin and commercial TiO2 powder. This improvement can be attributed to the formation of a Schottky barrier between silver nanoparticles and TiO2, which greatly improved the surface charge separation, as well as the presence of carbon serving as a sensitizer to absorb visible light and inject electrons into the conduction band of TiO2.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Engineering, Environmental
Manpreet Kaur Aulakh, Bonamali Pal
Summary: Solar irradiated plasmonic Ag-TiO2 (P25) nanocomposites showed higher efficiency in reducing nitroaromatics compared to bare TiO2, with the focus on the impact of photodeposition time on the photocatalytic activity and characteristics of deposited Ag nanoparticles on the titania surface.
CHEMICAL ENGINEERING JOURNAL
(2022)
