Review
Green & Sustainable Science & Technology
R. Sivaranjanee, P. Senthil Kumar
Summary: Carbon spheres are widely recognized for their excellent carbonaceous source and remarkable adsorption capacity. The hydrothermal method is commonly used for synthesizing carbon spheres due to its mild conditions and environmental friendliness. This method is known for its simplicity, moderate reaction conditions, simple procedure, and natural agreeableness.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Biochemistry & Molecular Biology
Maria Balda, Katrin Mackenzie, Silke Woszidlo, Hans Uhlig, Jens Moellmer, Frank-Dieter Kopinke, Gerrit Schueuermann, Anett Georgi
Summary: Recent innovative adsorption technologies for water purification utilize micrometer-sized activated carbon for fast adsorption or in situ remediation. This study demonstrates the synthesis of tailored activated carbon spheres from sucrose as a renewable feedstock. The synthesized carbon spheres showed excellent colloid properties and the ageing process was investigated. Furthermore, the adsorption characteristics of the carbon spheres for different adsorbates were studied, showing high sorption affinities.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Applied
Nitin Gumber, Rajesh Pai, Kaushik Sanyal, Bijaideep Dutta, P. A. Hassan
Summary: Two cerium-based metal organic frameworks were prepared and characterized, with the composite material CeO2@UiO-66(Ce) showing higher uranium adsorption capacity and good thermal stability compared to UiO-66(Ce), but with slower adsorption rate. Both frameworks exhibited high selectivity to U(VI) over Fe(III), Co(II), Ni(II), and Sr(II).
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Analytical
Lan Liu, Xiaoyan Lin, Mengsha Li, Huanhuan Chu, Hongyi Wang, Yu Xie, Zhichen Du, Meijuan Liu, Lili Liang, Hongying Gong, Jian Zhou, Zhanguo Li, Xuegang Luo
Summary: In this study, phosphorus-doped hydrothermal carbon was successfully synthesized by using phytic acid and Sodium tripolyphosphate. The functionalized carbon exhibited a high uranium(VI) adsorption capacity due to the chelation of P=O, P-OH functional groups with uranium(VI), showing improved selective adsorption performance for uranium(VI).
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Chemistry, Physical
Meng Sun, Yunlong Zhou, Mei Yang
Summary: A composite photocatalyst based on g-C3N4/CdS/corn straw hydrothermal carbon spheres was prepared and its photoelectric characteristics were studied. The composite showed synergistic photocatalytic performance, with enhanced carrier transfer rate and increased surface active sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Environmental
Minhua Su, Tao Ou, Jiayi Li, Lizhi Tong, Weixing Han, Yuhua Wu, Diyun Chen
Summary: Uranium mining and nuclear energy production generate large amounts of uranium-containing radioactive wastewater. Silicate minerals such as halloysite nanotubes enriched in Fe, Al, and Si have properties suitable for treating this wastewater. In this study, nanorod composites of halloysite nanotubes loaded with alpha-Fe2O3 and Fe3O4 were used to adsorb uranyl ions. The equilibrium adsorption was achieved within a short contact time, and the maximum adsorption capacities were 74.64 mg/g and 66.40 mg/g for He-HNTs and Ma-HNTs, respectively. Ma-HNTs showed excellent magnetic separation performance for uranium-containing radioactive wastewater. The sequestration behavior of U(VI) on He-HNTs and Ma-HNTs was dominated by ion exchange, surface complexation, and electrostatic interactions. Reduction processes contributed to greater U(VI) removal efficiency in the Ma-HNTs-U(VI) system. The iron oxide-halloysite composites hold great promise for treating uranium(VI)-containing wastewater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Ziwei Zou, Lu Yang, Yuan Liu, Yue Zhang, Dandan Cao, Ziwen Du, Jie Jin
Summary: The study evaluated the adsorption, recovery, and heavy metal risk of uranium (VI) using hydrochar and pyrochar at different temperatures. The results showed that HC190 demonstrated the highest adsorption capacity for uranium (VI) under acidic conditions. The adsorption of uranium (VI) by RS and its biochars was influenced by the complexation with oxygen- and phosphorus-containing functional groups and electrostatic attraction.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Suk-Hyun Yoo, Jin-Kyu Kang, Seung-Chan Lee, Ho-Young Jang, Song-Bae Kim
Summary: The sucrose-derived carbon spheres (SDCSs) show high adsorption capacity and reusability for removing DCF from aqueous solutions. Experimental results indicate that the DCF adsorption capacity was highest at an initial pH of 5 and decreased gradually as the pH was increased to 11.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Agricultural Engineering
Weijie Ye, Jihai Cai, Fanzhe Yu, Xiaoyun Li, Xiaoying Wang
Summary: In this study, bagasse was successfully transformed into nitrogen-doped carbon spheres through hydrothermal carbonization, and the composite material with reduced graphene oxide showed promising properties as electrode material for supercapacitor, including high specific capacitance, rate capability, and cycling stability. The full solubility of bagasse in NaOH/urea aqueous system not only offers a potential method for direct conversion of lignocellulosic raw biomass into carbon spheres, but also presents a new strategy for synthesizing high capacitive and stable biomass-based electrode materials.
BIOMASS & BIOENERGY
(2021)
Article
Chemistry, Analytical
Martin Wortmann, Waldemar Keil, Bennet Brockhagen, Jan Biedinger, Michael Westphal, Christian Weinberger, Elise Diestelhorst, Wiebke Hachmann, Yanjing Zhao, Michael Tiemann, Guenter Reiss, Bruno Huesgen, Claudia Schmidt, Klaus Sattler, Natalie Frese
Summary: The study investigated the effects of temperature changes during pyrolysis on the chemical composition, morphology, and crystallinity of hydrochar, revealing the formation of oxygen-rich nanoclusters below 700 degrees Celsius which decompose below 750 degrees Celsius, leaving behind uniformly sized pores that result in a surface area of up to 480 m2/g.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Environmental Sciences
Hongliang Bao, Chunyu Xie, Ling Han, Zenghui Yue, Yuan Qian, Linjuan Zhang, Zi-Jian Li, Huangjie Lu, Jian Lin, Jian-Qiang Wang
Summary: Oxidized carbon foam showed fast sorption kinetics and high sorption capacity for U(VI) after oxidation treatment, with carboxyl groups introduced as sorption sites. Analysis using energy-dispersive X-ray spectroscopy and extended X-ray absorption fine structure spectroscopy revealed the coordination of UO22+ cation with carboxyl groups on the surface of oxidized CF.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Inorganic & Nuclear
C. Sambathkumar, M. Krishna Kumar, N. Nallamuthu, K. Rajesh, P. Devendran
Summary: In this study, Co(OH)(2), Fe2O3, and Mn3O4 nanomaterials layered over the surface of carbon spheres were successfully synthesized using the hydrothermal route. Structural confirmation and electrochemical capacitive nature analysis showed that Co(OH)(2) covered carbon spheres exhibited a higher specific capacitance value.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Review
Engineering, Environmental
Shah Abdul Fahad, Md Sadique Nawab, Mohd Azfar Shaida, Swati Verma, Mohd Umar Khan, Vasiuddin Siddiqui, Mu Naushad, Laiba Saleem, Izharul Haq Farooqi
Summary: This article summarizes recent studies on the strategies and techniques of uranium species removal using carbon-based adsorbents such as activated carbon, biochar, and graphene materials. The advantages and mechanisms of these adsorbents are discussed through surface functionalization research. The performance of various carbon-based adsorbents is compared to evaluate their usefulness in uranium removal.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Energy & Fuels
Jiankai Wang, Baoru Zhao, Xin Huang, Yue Wang, Xiaoyu Du, Liang Wei, Yong Zhang, Wenhui Ma
Summary: By preparing carbon microspheres from waste biomass corn stalks and inserting them into composite hydrogels, the restacking of graphene sheets was effectively inhibited, resulting in high-performance electrode materials with excellent electrochemical performance. This work is of great significance for the high value-added conversion of waste biomass and the preparation of supercapacitors.
Article
Chemistry, Physical
Shuang Liu, Zhe Wang, Yuexiang Lu, Hongpeng Li, Xianjie Chen, Guoyu Wei, Tong Wu, Daniel-James Maguire, Gang Ye, Jing Chen
Summary: The SUPER method utilizing a bifunctional carbon nitride material, CN550, has shown a significant improvement in both uranium adsorption capacity and photocatalytic activity. Compared to the pure physicochemical adsorption (PA) method, the SUPER method achieved a tenfold higher uranium extraction capacity, reaching up to 1556 mg g(-1).
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
