Article
Biodiversity Conservation
Hongyu Zhang, Xiao Zhang, Cong Xie, Wenbin Shi, Ping Yang
Summary: Accordion-like Ti3C2Tx MXene was successfully prepared via chemical etching, and TiO2 nanocrystals were grown on Ti3C2Tx nanosheets by in-situ oxidation using a powerful alkaline solution. The ratio of Ti3C2Tx and TiO2 was optimized, resulting in TiO2/Ti3C2Tx composites with excellent photocatalytic activity, especially for NO removal. The microstructure of TiO2/Ti3C2Tx composites contributed to the improvement of the separation and transfer efficiency of photogenerated carriers. The composite sample synthesized at 75 degrees Celsius showed the best NO removal efficiency, removing 70% of NO at a concentration of 600 ppb. This study offers a new approach for preparing high-performance MXene-based photocatalysts.
ECOLOGICAL INDICATORS
(2023)
Article
Crystallography
Federico Giuffrida, Lucia Calcagno, Gianni Pezzotti Escobar, Massimo Zimbone
Summary: The photocatalytic properties of TiO2/FeO3 and TiO2/WO3 nanocomposites were investigated for the degradation of methylene blue. The non-conventional Doctor Blade technique was proposed as an easy and inexpensive method for material preparation. The use of solid substrates rather than powders and the high surface area of nanoparticles improved the photodegradation efficiency.
Article
Environmental Sciences
Hongyu Zhang, Xiao Zhang, Cong Xie, Wenbin Shi, Ping Yang
Summary: In this paper, few-layered Ti3C2Tx MXene was prepared via a chemical etching strategy, followed by in-situ oxidation using a powerful alkaline solution to grow TiO2 nanocrystals. The TiO2/Ti3C2Tx composites showed excellent photocatalytic activity, especially for NO removal, due to the advantages of Ti3C2Tx nanosheets and TiO2 nanocrystals. The microstructure of the composites improved the separation and transfer efficiency of photogenerated carriers.
ENVIRONMENTAL RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Mohd Fadhil Majnis, Ong Chia Yee, Mohd Azam Mohd Adnan, Mohd Rashid Yusof Hamid, Ku Zilati Ku Shaari, Nurhidayatullaili Muhd Julkapli
Summary: In this study, chitosan and zirconia were integrated into titanium dioxide nanoparticles through a sol-gel fabrication method to generate CS-ZrO2/TiO2 catalyst. The hybrid catalyst showed reduced band gap energy, enhanced photocatalytic activity, and improved photodegradation efficiency of model dye compounds under solar irradiation.
Article
Environmental Sciences
Guy Didier Fanou, Mamadou Traore, Benjamin Kouassi Yao, Andrei Kanaev, Khay Chhor
Summary: A new composite photocatalyst was developed by grafting size-selected 5-nm titanium-oxo-alkoxo nanoparticles onto P25-TiO2 nanoparticles and incorporating HAP obtained by co-precipitation of salts. The photocatalytic yield was increased for the composite photocatalysts with the addition of HAP, likely due to a synergy between adsorption and photo-oxidation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Valentin Diez-Cabanes, Aprimengel Morales-Garcia, Francesc Illas, Mariachiara Pastore
Summary: Semiconducting heterojunction-based devices using transition metal oxides like tungsten (WO3) and titanium (TiO2) exhibit the best photocatalytic performance currently, due to the ability to optimize electron/hole injection barriers through size, morphology, and composition adjustments. However, this approach requires a deep understanding of structure-property relationships that are difficult to access through experiments.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Zhihui Hu, Huanmin Liu, Ningxin Kang, Kangle Lv, Qin Li
Summary: Using solvothermal methods, two-dimensional titanium carbide (Ti3C2TX) MXene was oxidized in situ into TiO2 nanocrystals, providing an effective strategy for constructing highly efficient TiO2/Ti3C2TX heterojunctions for photocatalytic applications. The choice of solvent during the process was found to have a significant impact on the oxidation and performance of Ti3C2TX. This work highlights the importance of the oxidation environment for Ti3C2TX and brings about new considerations for the processing techniques of MXene families for practical applications.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Manuel Luna, Adrian Gonzalez-Hidalgo, Ana Diaz, Daniel Goma, Jose Manuel Gatica, Maria Jesus Mosquera
Summary: This study explores the effect of SMSI induced by soft wet-chemistry in Au/TiO2 photocatalyst for environmental remediation. Different types of pollutants were evaluated, and the results showed that SMSI has a positive effect on photoactivity, promoting the removal of methylene blue and soot. However, SMSI did not provide any additional benefit in the elimination of NOx.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Yuzhi Zhou, Peilin Wang, Lixia Qin, Shi-Zhao Kang, Xiangqing Li
Summary: It is important to develop efficient composite photocatalysts and understand the electron transfer mechanism in photocatalytic hydrogen evolution. In this study, a novel composite nanoarchitectonics (Cu2O@TiO2@ZIF-8) with double-shell heterojunctions was constructed by coating zeolite imidazolate framework-8 (ZIF-8) shell on the outer surface of core-shell Cu2O/ TiO2 heterojunction. The nanoarchitectonics showed higher photocatalytic activity and stability for hydrogen evolution compared to similar systems, without loading any cocatalysts. The research demonstrated the effective suppression of electron-hole recombination and the synergistic effect between Cu2O@TiO2 and ZIF-8 in improving electron transfer and photocatalytic activity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Min Seong Lee, Sun- Kim, Bora Jeong, Jin-Woo Park, Taehyo Kim, Jung Woo Lee, Gibum Kwon, Duck Hyun Lee
Summary: Research on coating an NH4+ layer on a vanadium-based catalyst can significantly improve its NOX removal efficiency over a wide temperature range, as well as enhance its proton conductivity, reducing the amount of vanadium oxides and tungsten oxide.
Article
Chemistry, Multidisciplinary
Radek Zouzelka, Jiri Olejnicek, Petra Ksirova, Zdenek Hubicka, Jan Duchon, Ivana Martiniakova, Barbora Muzikova, Martin Mergl, Martin Kalbac, Libor Brabec, Milan Kocirik, Monika Remzova, Eva Vaneckova, Jiri Rathousky
Summary: Heterogeneous photocatalysis of TiO2 is effective for water and air purification. Hierarchical TiO2 layers showed favorable kinetics and reaction selectivity in decontamination, with better suppression of NO and NO2 compared to industrial benchmark Aeroxide(R) TiO2 P25. The hierarchical TiO2 layers have promising potential for environmental remediation.
Article
Environmental Sciences
Zahra Razavi, Nourollah Mirghaffari, Mohsen Soleimani
Summary: Efficient removal of CO2 can be achieved using synthetic and natural zeolite as a photocatalyst support under solar irradiation. The performance of CO2 photocatalytic removal is enhanced by increased sunlight irradiation. The CO2 adsorption rate of TiO2-Ze and TiO2-Cp composites increased to 61.8% and 78.9% respectively.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Ajit Dattatray Phule, Joo Hong Choi, Jin Hyoung Kim
Summary: NOx emissions from stationary and mobile sources are a major global environmental issue, with selective catalytic reduction (SCR) using V2O5-WO3/TiO2 (VWT) catalyst being the most effective technique for reducing these emissions. Manganese has been found to be the best substitute for vanadium in the VWT catalyst, improving catalytic efficiency and maintaining stable NO conversion performance. The addition of manganese in the 3Mn3V9WT powder catalyst enhances NO conversion performance, with NH3 leakage below 20ppm and NOx conversion reaching 95-98% at temperatures between 260-320 degrees Celsius.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Marta Kowalkinska, Agnieszka Fiszka Borzyszkowska, Anna Grzegorska, Jakub Karczewski, Pawel Gluchowski, Marcin Lapinski, Miroslaw Sawczak, Anna Zielinska-Jurek
Summary: In this study, a novel WO3/S-doped g-C3N4 nanocomposite was developed for efficient removal of NOx in the air through photocatalytic reactions. The photocatalytic tests were conducted in a continuous-flow photoreactor, which demonstrated that the composite exhibited high efficiency in converting NO2 and had good stability.
Article
Chemistry, Applied
Francisco Lopez-Tenllado, Rafael Estevez, Jesus Hidalgo-Carrillo, Silvia Lopez-Fernandez, Franciso Jose Urbano, Alberto Marinas
Summary: In this work, TiO2 supported on zeolite (USY62) photocatalysts were synthesized by sol-gel method and incorporated with Pt, Au, or Ag by impregnation or photodeposition. The photocatalytic activity of the composites was examined and it was found that catalysts prepared by photodeposition were more active. Moreover, zeolite-supported TiO2 showed smaller deactivation in H2 production compared to unsupported TiO2. A photocatalyst (USY-Ti-PPt) with up to four times higher activity than unsupported TiO2 under UV radiation was prepared.
Article
Computer Science, Information Systems
Bo Wang, Khaled Shaaban, Inhi Kim
Summary: Neural network models have been successfully used in traffic prediction, improving accuracy and efficiency. Discrete variables play a crucial role in these models, with entity embedding enhancing the continuity of categorical variables.
PERSONAL AND UBIQUITOUS COMPUTING
(2021)
Article
Engineering, Civil
Jaehyun (Jason) So, Jiwon Kang, Sangmin Park, Inseon Park, Jongdeok Lee
JOURNAL OF ADVANCED TRANSPORTATION
(2020)
Article
Transportation
Xinyuan Chen, Zhiyuan Liu, Inhi Kim
TRANSPORTMETRICA A-TRANSPORT SCIENCE
(2020)
Article
Ecology
Nash Jett Reyes, Franz Kevin Geronimo, Lee-Hyung Kim
ECOLOGICAL ENGINEERING
(2020)
Article
Economics
Chunliang Wu, Inhi Kim
TRANSPORTATION RESEARCH PART A-POLICY AND PRACTICE
(2020)
Article
Chemistry, Multidisciplinary
Hyeonchoel Jeong, Inhi Kim, Keejun Han, Jungeun Kim
Summary: This study utilized the traffic accident dataset from the Seoul Metropolitan Government to identify the major factors and types that affect the severity of traffic accidents in Seoul. The research findings indicate that environmental factors such as weather, season, and day of the week do not significantly impact the severity of traffic accidents in Seoul. However, pedestrian-related factors were found to be highly important.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Marine
Zahra Nourmohammadi, Fatemeh Nourmohammadi, Inhi Kim, Shin Hyoung Park
Summary: This study investigates the application of deep learning in short- and long-term predictions of accident risks associated with small vessels. Multiple influencing factors are considered, and machine learning and deep learning algorithms are implemented and compared. The results show that the proposed deep spatiotemporal ocean accident prediction model performs well in predicting accidents with a high accuracy.
Article
Chemistry, Analytical
Sicong Zhu, Hao Yue, Tatsuto Suzuki, Inhi Kim, Lei Yu, Qing Lan
Summary: This paper investigates the safety issue for cyclists and pedestrians at unsignalized intersections and proposes a method to extract cycling trajectories using an integrated portable ultra-wideband/inertial navigation system. The system is based on open-source hardware and an adaptive Kalman filter is used to enhance positioning precision. The results show that the system can provide reliable trajectories for low-mobility objects. Different cycling speed calming measures are tested at an experimental site to mitigate accident risk and severity. The statistical features of cycling velocities are evaluated and compared, and a newly proposed geometric design is found to be the most effective.
Article
Green & Sustainable Science & Technology
Sicong Zhu, Inhi Kim, Keechoo Choi
Summary: Research conducted with a high-resolution driving simulator provides insights into the acceleration profiles of leading vehicles at intersections, showing that observed accelerations are stochastic and characteristics are significantly diversified among participants. A Markov chain is used to simulate acceleration behaviors based on collected data, reconstructing profiles and reproducing randomness.
INTERNATIONAL JOURNAL OF SUSTAINABLE TRANSPORTATION
(2021)
Article
Green & Sustainable Science & Technology
Chunliang Wu, Hyungchul Chung, Zhiyuan Liu, Inhi Kim
Summary: This study investigates the impact of built environment on the structural properties of bike-sharing networks through complex network techniques and spatial regression models. The findings suggest that factors such as resident population, accessibility to subway stations and the length of main roads have significant effects on the importance of bike stations in the network.
INTERNATIONAL JOURNAL OF SUSTAINABLE TRANSPORTATION
(2021)
Review
Green & Sustainable Science & Technology
Tianqi Gu, Inhi Kim, Graham Currie
Summary: The market share of human-powered bicycles declined steadily before 2016, but with the emergence of dockless bikeshare, government policies also adjusted. E-bikes and motorbikes showed independent growth trends, with changing attitudes from the government.
INTERNATIONAL JOURNAL OF SUSTAINABLE TRANSPORTATION
(2021)
Proceedings Paper
Computer Science, Artificial Intelligence
Khaled Shaaban, Muhammad Asif Khan, Inhi Kim, Ridha Hamila
11TH INTERNATIONAL CONFERENCE ON AMBIENT SYSTEMS, NETWORKS AND TECHNOLOGIES (ANT) / THE 3RD INTERNATIONAL CONFERENCE ON EMERGING DATA AND INDUSTRY 4.0 (EDI40) / AFFILIATED WORKSHOPS
(2020)
Proceedings Paper
Computer Science, Artificial Intelligence
Wenhua Jiang, Zhenliang Ma, Inhi Kim, Seonha Lee
11TH INTERNATIONAL CONFERENCE ON AMBIENT SYSTEMS, NETWORKS AND TECHNOLOGIES (ANT) / THE 3RD INTERNATIONAL CONFERENCE ON EMERGING DATA AND INDUSTRY 4.0 (EDI40) / AFFILIATED WORKSHOPS
(2020)
Article
Engineering, Chemical
Joseph Albert Mendoza, Dong Hoon Lee, Joo-Hyon Kang
DESALINATION AND WATER TREATMENT
(2020)
Article
Green & Sustainable Science & Technology
Kun An, Wentao Jing, Inhi Kim
INTERNATIONAL JOURNAL OF SUSTAINABLE TRANSPORTATION
(2020)
