Article
Engineering, Environmental
Xiangtong Kong, Shikha Garg, Guifeng Chen, David Waite
Summary: In this study, the performance of a catalytic ozonation process for treating coal chemical industry wastewater using Fe2O3/Al2O3·SiO2 catalyst was investigated. The catalyst's activity decreased over time due to the formation of a carbonaceous layer on its surface, which inhibited the ozone-catalyst interaction. Calcination was found to be an effective method for restoring the catalyst's activity by removing the carbonaceous layer. Cost analysis showed that regeneration through calcination is economically viable compared to catalyst replacement.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Rashmi Mahajan, Subramanian Suriyanarayanan, Ian A. Nicholls
Summary: Monodisperse magnetic gamma-Fe2O3 nanoparticles (MNPs) were prepared using SDS and PEG 6000 as double capping reagents, leading to improved uniformity and colloidal stability. These MNPs with silica coatings can be used in a variety of applications, such as magnetic separation, catalysis, and templated nanogel synthesis.
Article
Nanoscience & Nanotechnology
Ji Hun Jung, Gye Seok An
Summary: This study investigates a method for synthesizing gamma-Fe2O3@SiO2 nanoparticles using sodium silicate (Na2SiO3) as a precursor. A surface treatment involving an acid or base is utilized to prepare activation sites for grafting the SiO2 network onto the magnetic particles. The effects of pH on the surface charge and coating layer thickness of the nanoparticles are analyzed, and the optimal pH is determined. The resulting nanoparticles exhibit improved dispersibility and are evaluated for DNA purification. Residual Na ions on the particle surface can reduce the purification efficiency, so additional acid treatment is performed to remove them. The correlation between surface charge and interparticle forces is examined, and it is found that the purification efficiency improves as the zeta potential and particle size distribution increase. In conclusion, gamma-Fe2O3@Na2SiO3 nanoparticles are successfully fabricated using Na2SiO3 and additional acid treatment, providing a promising alternative method for synthesizing gamma-Fe2O3@SiO2 nanoparticles with improved dispersibility and purification efficiency.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Saruta Deeprasert, Lilin Wang, Konstantinos Simeonidis, Nguyen Thi Kim Thanh, Etienne Duguet, Stefanos Mourdikoudis
Summary: The study describes a synthesis method for nanocomposites composed of silica nanoparticles decorated with magnetic maghemite nanoparticles on their surface dimples, for use in detecting and recovering arsenic in water. The process involves amination and carboxylation to graft the maghemite nanoparticles onto the silica nanoparticles, resulting in magnetic nanocomposites suitable for environmentally friendly arsenic detection and removal. This approach shows promise in the field of environmental remediation.
Article
Materials Science, Multidisciplinary
Tae Jun Park, Joon Sung Choi, Dong Joon Min
Summary: Increasing the Al2O3 content in the Fe2O3-CaO-Al2O3-SiO2 pseudo-quaternary system led to a decrease in hematite content in the sintered ore, affecting its reducibility. The correlation between the creation of SFCA and the cooling effect associated with varying the Al2O3 content is discussed in detail in the paper.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Jiankang Wang, Taiping Xie, Guokang Han, Quanxi Zhu, Yajing Wang, Yuan Peng, Songli Liu, Zhongping Yao
Summary: A mesoporous gamma-Fe2O3@MnO2 magnetic catalyst with SiO2 assistance was synthesized to enhance the specific surface area and improve phenol degradation efficiency through PMS activation. This study provides guidance for the synthesis of highly efficient catalysts for sewage remediation.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Rui-Feng Xin, Xing-Min Guo
Summary: SiO2 plays a crucial role in the crystallization of calcium ferrite during the sintering process of iron ore. Increasing SiO2 content changes the crystal morphology and size, and higher cooling rates promote certain crystalline phases while inhibiting others.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Siyu Cheng, Maksym Shevchenko, Peter C. Hayes, Evgueni Jak
Summary: New experimental measurements have been conducted to determine liquidus isotherms and equilibria in various systems, providing more accurate data for multi-component Fe-Ca-Si-O-Al-Mg-Cu-S systems relevant to cement, ferrous, and non-ferrous metallurgical industries.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2021)
Article
Chemistry, Applied
Nassira Ferroudj, Patricia Beaunier, Anne Davidson, Sebastien Abramson
Summary: The study explored the relationship between the activity and structure of γ-Fe2O3/SiO2 nanocomposite microspheres as heterogeneous catalysts, revealing that doped Fe3+ and ordered mesoporosity significantly enhance the activity of the materials, demonstrating excellent oxidation and mineralization effects on simulated water pollutants.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Physical
Ho Jin Lee, Eun Duck Park
Summary: This study investigates the efficiency of ammonia decomposition by controlling the particle size of Ru catalysts. It is found that Ru/SiO2 catalysts with high surface area and particle sizes ranging between 5 and 6 nm achieve the highest ammonia conversion at 400 degrees Celsius, supporting the notion that ammonia decomposition is a structure-sensitive reaction.
Article
Geochemistry & Geophysics
Isis R. Ignacio, Geoffrey Brooks, Mark Pownceby, M. Akbar Rhamdhani, Willian John Rankin, Nathan A. S. Webster
Summary: Porosity plays a crucial role in determining the reducibility of sinter materials, and the presence of SFCA bonding phases is not necessary to achieve high reducibility.
Article
Chemistry, Physical
Ashish Nadar, Atindra Mohan Banerjee, M. R. Pai, Sher Singh Meena, A. K. Patra, P. U. Sastry, R. Singh, M. K. Singh, A. K. Tripathi
Summary: The study focused on addressing the issues of catalytic activity and stability of the Fe2O3/SiO2 catalyst using different preparation methods. The catalysts showed varying properties and the sample prepared by polyol method exhibited higher activity and stability.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Crystallography
Ratnawulan Ratnawulan, Ramli Ramli, Ahmad Fauzi, Sukma Hayati AE
Summary: This study synthesized PS/CuO-Fe2O3 nanocomposites for hydrophobic coatings. By varying the composition of CuO and Fe2O3 as well as the calcination temperature, the highest contact angle value was achieved. Characterization of samples was done using XRD, SEM, and UV-Vis analysis.
Article
Materials Science, Multidisciplinary
Jun Gil Yang, Joo Ho Park, Ji Yeon Kang, Hyun Sik Park, Joo Hyun Park
Summary: The study found that gold solubility in the CaO-SiO2-Al2O3-Fe2O3 slag system increases with increasing slag basicity, while the influence of Fe2O3 and Al2O3 on gold solubility is minimal. Gold is stabilized as the aurate complex ion, and its dissolution reaction into the slag was proposed.
Article
Energy & Fuels
F. Dashtestani, M. Nusheh, V. Siriwongrungson, J. Hongrapipat, V. Materic, S. Pang
Summary: This study investigated the impact of contaminants in biomass gasification producer gas on the CO2 capture performance of a CaO and Fe2O3 based sorbent material. Experimental results showed effective CO2 capture in the initial stages and a catalytic effect of the sorbent material in removing contaminants from the gas.
Article
Chemistry, Multidisciplinary
M. J. Al-Marri, M. M. Khader, M. Tawfik, G. Qi, E. P. Giannelis
Article
Chemistry, Physical
Bin Liang, Wu Zhan, Genggeng Qi, Sensen Lin, Qian Nan, Yuxuan Liu, Bing Cao, Kai Pan
JOURNAL OF MATERIALS CHEMISTRY A
(2015)
Article
Materials Science, Multidisciplinary
Kasibhatta Kumara Ramanatha Datta, Genggeng Qi, Radek Zboril, Emmanuel P. Giannelis
JOURNAL OF MATERIALS CHEMISTRY C
(2016)
Article
Chemistry, Physical
Jiupeng Cao, Yifan Zhao, Yatong Zhu, Xiaoyu Yang, Peng Shi, Hongdi Xiao, Na Du, Wanguo Hou, Genggeng Qi, Jianqiang Liu
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2017)
Article
Materials Science, Multidisciplinary
Jiupeng Cao, Yatong Zhu, Xiaoyu Yang, Sha Liu, Dong Liu, Xiaoyan Tang, Hongdi Xiao, Wanguo Hou, Genggeng Qi, Jianqiang Liu
MATERIALS RESEARCH EXPRESS
(2017)
Article
Chemistry, Physical
Jianqiang Wang, Chao Luo, Genggeng Qi, Kai Pan, Bing Cao
APPLIED SURFACE SCIENCE
(2014)
Article
Chemistry, Multidisciplinary
Liling Fu, Genggeng Qi, Osama Shekhah, Youssef Belmabkhout, Luis Estevez, Mohamed Eddaoudi, Emmanuel P. Giannelis
Article
Engineering, Environmental
Moshe Ben-Sasson, Katherine R. Zodrow, Qi Genggeng, Yan Kang, Emmanuel P. Giannelis, Menachem Elimelech
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2014)
Article
Engineering, Chemical
Shuai Liang, Genggeng Qi, Kang Xiao, Jianyu Sun, Emmanuel P. Giannelis, Xia Huang, Menachem Elimelech
JOURNAL OF MEMBRANE SCIENCE
(2014)
Article
Polymer Science
Kai Pan, Haizhu Li, Bin Liang, Genggeng Qi, Bing Cao
POLYMER INTERNATIONAL
(2015)
Article
Engineering, Environmental
Moshe Ben-Sasson, Xinglin Lu, Edo Bar-Zeev, Katherine R. Zodrow, Siamak Nejati, Genggeng Qi, Emmanuel P. Giannelis, Menachem Elimelech
Article
Multidisciplinary Sciences
Genggeng Qi, Liling Fu, Emmanuel P. Giannelis
NATURE COMMUNICATIONS
(2014)
Article
Materials Science, Multidisciplinary
Liling Fu, Kasibhatta Kumara Ramanatha Datta, Konstantinos Spyrou, Genggeng Qi, Ali Sardar, Mahmoud M. Khader, Radek Zboril, Emmanuel P. Giannelis
APPLIED MATERIALS TODAY
(2017)
Article
Nanoscience & Nanotechnology
Lihong Lao, Liling Fu, Genggeng Qi, Emmanuel P. Giannelis, Jintu Fan
ACS APPLIED MATERIALS & INTERFACES
(2017)
Article
Chemistry, Inorganic & Nuclear
Mahsa Saberian, Alireza Nezamzadeh-Ejhieh
Summary: CuO was successfully supported on clinoptilolite nanoparticles (NCP) via ion exchange and calcination, forming CuO-NCP photocatalysts. CuO-NCP exhibited enhanced photocatalytic activity towards tetracycline (TC), and the best degradation performance was achieved under optimal conditions (25 ppm TC solution, pH 4.8, and 0.5 g/L catalyst).
SOLID STATE SCIENCES
(2024)
