Article
Chemistry, Multidisciplinary
Changxin Li, Xiang Li, Yuan Yu, Qingwu Zhang, Li Li, Hong Zhong, Shuai Wang
Summary: This study introduced a method to synthesize hydroxyapatite-zeolite composite material using blast furnace slag, which exhibited excellent adsorption performance in removing various ions from water. The analysis identified the major phases and properties of the synthesized HAP-ZE material, laying a foundation for effective application of blast furnace slag.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Changxin Li, Xiaoya Li, Chaoyang Li, Li Li
Summary: A blast furnace slag zeolite (BFSZ) material was successfully synthesized from BFS by alkaline fusion and hydrothermal treatment. The main composition in the product is Na-A zeolite when synthesized at a crystallization temperature of 100 degrees C with initial Si/Al ratio of 1:1. The obtained BFSZ material has a great adsorption performance for removing Mn2+, Cu2+, and NH4+ ions diluted in water, owing to the higher CEC.
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
(2023)
Article
Geochemistry & Geophysics
Changxin Li, Xiang Li, Qingwu Zhang, Li Li, Shuai Wang
Summary: In this study, zeolite material was successfully prepared from blast furnace slag using alkaline fusion-hydrothermal synthesis. Analyses showed that the crystallization of BFSZ was almost complete at 6 hours, and the Si/Al (Na/Al) molar ratio was highly affected by crystallization time. Further increasing the crystallization time did not significantly influence the size and morphology of the BFSZ product.
Review
Materials Science, Ceramics
Murat Cavus, Mustafa Dayi, Yunus Dagci, Hayati Ulusu
Summary: In this study, the replacement of air lime with three different pozzolanic materials was investigated. The mechanical and physical properties of the produced pozzolanic lime mortars under different curing conditions were studied. It was found that high relative humidity cure improved the mechanical properties of pozzolan mortars, but had no significant effect on their physical properties.
CERAMICS INTERNATIONAL
(2023)
Article
Energy & Fuels
Huangyu Yan, Guojie Zhang, Ying Wang, Jun Liu, Guoqiang Li, Yuqiong Zhao, Ying Xu, Yongkang Lv
Summary: In this study, a low-cost and efficient CO2 adsorbent was prepared using tetraethylenepentamine functionalized blast furnace slag. Various characterization analyses were performed, and the effects of structure, TEPA loading, and adsorption temperature on the material properties were investigated. The results showed that BFS10.5-50TEPA with more pores and high amine efficiency was an ideal adsorbent.
Article
Green & Sustainable Science & Technology
Wenjun Duan, Diguang Wang, Zhimei Wang, Yaquan Zhan, Tongtong Mu, Qingbo Yu
Summary: A novel technical route was proposed for utilizing blast furnace slag to produce zeolite and hydrotalcite-like compound, showing good CO2 adsorption capacity and promising economic benefits in the economic evaluation.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Chemical
Guang Hu, Xu Duan, Jian Yang, Chen Yang, Qingcai Liu, Shan Ren, Jiangling Li, Liumei Teng, Weizao Liu
Summary: In this work, FAU and MFI type Ti-containing zeolites were successfully synthesized from Ti-bearing blast furnace slag through a facile hydrothermal method. The Ti-NaZSM-5 zeolite showed higher photocatalytic performance and was more suitable to be the support of the TiO2 photocatalyst than the Ti-NaX zeolite.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Chemistry, Physical
Wenjun Duan, Guangjie Li, Zhimei Wang, Diguang Wang, Qingbo Yu, Yaquan Zhan
Summary: This study investigated the optimal process conditions for synthesizing hydrotalcite-like compounds from blast furnace slag using a co-precipitation method, and established the synthesis mechanism. The results showed that a pH of 11.5, precipitation temperature of 343 K, crystallization temperature of 383 K, and a crystallization duration of 6-10 hours were the optimal conditions. Under these conditions, the compounds formed a typical crystal layered structure, providing a new technological path for the utilization of blast furnace slag and contributing to energy saving and emission reduction in the iron and steel industry.
APPLIED CLAY SCIENCE
(2022)
Article
Engineering, Environmental
Weizao Liu, Tahani Aldahri, Chunbao Xu (Charles), Chun Li, Sohrab Rohani
Summary: CO2 mineralization utilizing blast furnace slag for zeolite synthesis is an effective strategy for reducing anthropogenic CO2 emissions. Through optimization of experimental conditions, well-crystallized zeolite products can be obtained under mild conditions, reducing the overall cost of CO2 mineralization. The formation mechanism of zeolite from blast furnace slag involves dissolution of aluminate and silicate ions, formation of precursor gel, nucleation, and crystal growth.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Xiaoxin Wu, Rui Zhan, Lili Liu, Jinjing Lan, Ning Zhao, Zhiping Wang
Summary: This study investigates a low-cost approach for highly efficient phosphorus removal and recovery from wastewater using blast furnace slag as an adsorbent. The research finds that chemical adsorption is the dominant pathway, and phosphorus is evenly distributed on the surface of the slag and forms needle-like crystals. Non-magnetic particles have a larger adsorption capacity and are easier to recover compared to magnetic particles, making them suitable for phosphorus recovery from rural wastewater.
Article
Engineering, Environmental
Huimin Tang, Zhiwei Peng, Wenxing Shang, Lei Ye, Jun Luo, Mingjun Rao, Guanghui Li
Summary: The feasibility of converting high-iron electric furnace ferronickel slag and high-calcium blast furnace ferronickel slag to refractory materials was assessed. The addition of sintered magnesia was found to suppress the negative effects of FeO and CaO in the slag, resulting in the formation of refractory materials. The refractory material derived from EFFS showed higher refractoriness, lower bulk density, and larger compressive strength compared to that derived from BFFS.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Guang Hu, Sohrab Rohani, Xiaoyong Jiang, Jiangling Li, Qingcai Liu, Weizao Liu
Summary: A novel process combining CO2 mineral sequestration and zeolite synthesis was proposed in this study, resulting in the successful synthesis of a high surface area zeolite. Processing slag through this method can reduce CO2 emissions and effectively dispose of solid waste.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Construction & Building Technology
Noe Hernandez-Fernandez, Tania A. Garcia-Mejia, Rosa M. Ramirez-Zamora, Ricardo Ochoa-Diaz, Alexandra Ossa-Lopez
Summary: This study evaluated the effects of adding different types of slag on the properties of slag-modified asphalt, showing improvements in asphalt consistency and resistance to permanent deformation.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Environmental Sciences
Sabah M. Abdelbasir, Mohamed A. Abdel Khalek
Summary: Inordinate levels of heavy metals in water sources pose serious environmental and public health risks, but adsorption is an efficient, low-cost, and easy-to-operate technique for their removal. Blast furnace slag has been found to be a cheap sorbent that effectively removes Co2+ and Pb2+ ions from water. The adsorption process is influenced by factors such as pH, contact time, adsorbent dose, temperature, and initial ions concentration. The main adsorption mechanism between the slag and metal ions is ion exchange. Nonmodified BFS treatment shows great potential as a cost-effective adsorbent for water pollution treatment in terms of economics and scalability.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Construction & Building Technology
Jun Ren, Qi-Zhi Zhou, Chang-Hui Yang, Yun Bai
Summary: This paper investigates the effect of adding lignosulfonate (LS) superplasticiser at different stages of mixing on the workability and rheological behavior of sodium silicate activated slag (SSAS) to address the incompatibility between superplasticiser and alkaline activator. Various tests were conducted to understand the interactions between LS and fresh SSAS. The results show that separate addition of LS and activator improves the minislump and its retention in SSAS, with prior addition of LS yielding better results. However, a nonlinear rheological behavior was observed in LS-superplasticised SSAS, requiring the use of the modified Bingham model for description.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Chemistry, Physical
Guoxiang Yang, Yasutaka Kuwahara, Kohsuke Mori, Catherine Louis, Hiromi Yamashita
Summary: In this study, a heterogeneous catalyst for carbon dioxide hydrogenation was developed, which showed both excellent activity and recyclability. The catalyst consisted of a mononuclear Ru complex, N, P-containing porous organic polymers (POPs), and mesoporous hollow carbon spheres (MHCS). The optimized catalyst exhibited high catalytic activity and durability, attributed to the high surface area and large pore volume of MHCS, as well as the dispersion and stabilization capability of POPs. Ru3+-POPs encapsulated into MHCS reduced the activation energy barrier for CO2 hydrogenation.
Article
Nanoscience & Nanotechnology
Yukari Yamazaki, Tetsuya Toyonaga, Naoto Doshita, Kohsuke Mori, Yasutaka Kuwahara, Suzuko Yamazaki, Hiromi Yamashita
Summary: Hydrogen spillover induces defects in TiO2, improving conductivity and visible light absorption. Crystal facet engineering enhances activity by influencing electron and hole recombination. Pt-deposited TiO2-x nanorods synthesized through crystal facet engineering exhibit high catalytic activity under visible light.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Yasutaka Kuwahara, Masahiro Okada, Hao Ge, Hiromi Yamashita
Summary: The reduction of alpha-MoO3 using hydrogen spillover process combined with noble metal nanoparticles leads to the formation of hydrogen molybdenum bronze with plasmon-induced optical features. Pd-loaded hydrogen molybdenum bronze catalyst effectively promotes the hydrodeoxygenation of aromatic ketones to alkyl aromatics, and this catalytic activity is further enhanced under visible light irradiation due to the plasmonic effect.
Article
Engineering, Environmental
Ting Zhang, Yichan Wen, Zhelun Pan, Yasutaka Kuwahara, Kohsuke Mori, Hiromi Yamashita, Yixin Zhao, Xufang Qian
Summary: Fenton reaction plays important roles in biological and environmental remediation, but the low efficiency of H2O2/Fe(II/III) oxidation under acidic conditions limits its application. The study reveals that carbon quantum dots (CQDs) exhibit a higher H2O2 utilization efficiency and can improve the selectivity of toxic intermediates. Furthermore, the CQDs-Fe(III)/H2O2 process is less affected by inorganic ions and dissolved organic matter (DOM) in groundwater.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Yasutaka Kuwahara, Aiko Hanaki, Hiromi Yamashita
Summary: This study presents a facile method to convert converter slag into a CaO-Fe3O4-SiO2 composite with high CO2 adsorption performance, which can be used as an efficient solid adsorbent for CO2 capture. It offers an alternative approach that may provide solutions to both recycling of waste slag and recovery of CO2 gas that the iron and steel-making industry is currently confronting.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Applied
Zaza Hazrina Hashim, Yasutaka Kuwahara, Aiko Hanaki, Abdul Rahman Mohamed, Hiromi Yamashita
Summary: Investigations have been conducted on the use of excess slag waste in the iron and steel making industries, leading to the development of a carbon dioxide (CO2) capturing adsorbent. Various analytical techniques were employed to determine the morphological and physicochemical characteristics of the synthesized samples, revealing that the adsorbent synthesized using formic acid exhibited the highest CO2 adsorption capacity and regenerative ability. This environmentally friendly and economical adsorbent with high adsorption and reuse capability is advantageous for reducing CO2 emissions from the industry and promoting its long-term sustainability.
Article
Chemistry, Applied
Priyanka Verma, Kenjirou Tamaki, Toru Shimojitosho, Takeharu Yoshii, Yasutaka Kuwahara, Kohsuke Mori, Hiromi Yamashita
Summary: The study focuses on the effect of surface plasmon resonance on noble metal nanoparticles, and finds that coupling gold nanorods with Pd-rGO nanocomposite can enhance the catalytic performance. The successful synthesis of Pd/Au NRs@rGO catalyst was confirmed by various characterization techniques. Under visible light irradiation conditions, medium-sized gold nanorods show superior catalytic performance.
Article
Materials Science, Multidisciplinary
Katsuaki Naito, Yasutaka Kuwahara, Hiroko Yamamoto, Yasuhiro Matsuda, Katsushi Okuyama, Takuya Ishimoto, Takayoshi Nakano, Hiromi Yamashita, Mikako Hayashi
Summary: This study investigated the influence of fluoride and zinc ions on the acid resistance of dentin and found that zinc can improve the acid resistance of dentin.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Applied
Kenjirou Tamaki, Priyanka Verma, Takeharu Yoshii, Toru Shimojitosho, Yasutaka Kuwahara, Kohsuke Mori, Hiromi Yamashita
Summary: Research on the use of surface plasmon resonance induced by visible to near-infrared light for photocatalytic reactions has gained attention for solar energy utilization. This study focused on the synthesis and characterization of Pd/Au NRs@rGO nanocatalyst, which showed improved photocatalytic yield of formic acid through plasmon-mediated catalytic reactions under visible light irradiation. The prepared catalyst exhibited efficient transport of hot electrons to the reaction substrate, leading to a 2.7-fold increase in formic acid yield compared to dark reaction conditions.
Article
Energy & Fuels
Yasutaka Kuwahara, Hiromi Yamashita
Summary: This review discusses the design, preparation, and applications of multi-functional adsorbents and catalysts using poly(ethyleneimine) (PEI) as a CO2 adsorbent and nanoporous materials as supports. By tuning the surface properties of the support materials, the CO2 adsorption capacity and catalytic activity can be significantly improved, resulting in efficient regeneration and reusability.
JOURNAL OF THE JAPAN PETROLEUM INSTITUTE
(2022)
Article
Chemistry, Physical
Hao Ge, Yasutaka Kuwahara, Kazuki Kusu, Zhenfeng Bian, Hiromi Yamashita
Summary: This study demonstrates a simple strategy of utilizing plasmonic absorption effect to enhance the photothermal catalysis of CO2 to CH4. In situ infrared spectroscopic analysis reveals the pathway of the photothermal catalytic CO2 methanation reaction. This research provides new insights for developing efficient plasmonic catalysts for CO2 methanation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Review
Chemistry, Multidisciplinary
Hao Ge, Yasutaka Kuwahara, Hiromi Yamashita
Summary: The review explores the potential use of defective molybdenum oxide (HxMoO3-y) as a promising plasmonic material for various catalytic reactions due to its strong plasmonic absorption. The LSPR effect of HxMoO3-y can be tuned by controlling the doping amount, leading to the formation of unique and useful active sites in catalytic processes.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Hao Ge, Yasutaka Kuwahara, Kazuki Kusu, Hisayoshi Kobayashi, Hiromi Yamashita
Summary: This study presents a novel approach for photothermal catalytic reduction of CO2 using a Mo-doped Pt/WOy catalyst. The Pt/HxMoWOy catalyst exhibits excellent catalytic performance due to the abundance of surface free electrons and oxygen vacancies which play a crucial role in CO2 adsorption and transfer of photoinduced electrons. Experimental and analytical results confirm the feasibility and mechanism of this catalyst, with Mo doping being shown to promote the formation of oxygen vacancies.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Multidisciplinary
Priyanka Verma, Yasutaka Kuwahara, Kohsuke Mori, Robert Raja, Hiromi Yamashita
Summary: Plasmonic nanostructures offer unique opportunities for enhancing chemical reactions under light irradiation. However, challenges such as lower efficiency, stability, and understanding of reaction mechanisms still exist. This review explores plasmonic catalysis, including trends, challenges, and applications, using advanced characterization techniques to establish the structure-property relationship of plasmonic hybrid nanostructures based on noble metals in hydrogen generation and CO2 reduction reactions.
Article
Chemistry, Physical
Haibo Yin, Zhen Chen, Shangchao Xiong, Jianjun Chen, Chizhong Wang, Rong Wang, Yasutaka Kuwahara, Jingshan Luo, Hiromi Yamashita, Yue Peng, Junhua Li
Summary: PdCu/Cu2O hybrids with mesoporous hollow sphere structure exhibit high selectivity and Faradaic efficiency for NH3 synthesis from NO3(-) due to the electron transfer between Pd and Cu, as well as the blockage of intermediate generation by PdCu alloys.
