Article
Chemistry, Analytical
Hari Krishna Sadhanala, Saurav Aryal, Kusha Sharma, Ziv Orpaz, Shulamit Michaeli, Aharon Gedanken
Summary: In this study, photoluminescent N-doped carbon dots were synthesized and used for the selective detection and imaging of intracellular magnesium ions. This is the first report of using carbon dots for sensing and imaging of magnesium ions in cells.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Physical
Huiyu Li, Pingping Zuo, Shijie Qu, Fangfang Qin, Na Li, Wenzhong Shen
Summary: Nitrogen, sulfur codoped hierarchical porous carbon tubes were synthesized using oxidized asphaltene, melamine and trithiocyanuric acid. They exhibited excellent performance in detecting trace amounts of Cd2+/Pb2+ due to their sulfur and nitrogen functional groups as well as hierarchical porous structure.
APPLIED SURFACE SCIENCE
(2023)
Review
Nanoscience & Nanotechnology
Prashant Choubey, Mamta Devi Sharma, Mrinmoyee Basu
Summary: By constructing a heterostructure using WO3 2D nanosheets and sulfur/nitrogen-codoped carbon dots (SNCDs), the photoelectrochemical performance and hydrogen production can be enhanced. The heterostructure exhibits higher carrier density and lower charge-transfer resistances, and demonstrates good photostability under uninterrupted illumination.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Joon Yeob Lee, Jeong-Hak Choi
Summary: A nanomaterial, Cu-BTC MOF, was prepared and applied for the removal of Pb(II) ions from an aqueous solution, showing high adsorption capacity and efficient extraction with ion exchange as the dominant mechanism.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Environmental Sciences
Chien-Te Hsieh, Po-Yu Sung, Yasser Ashraf Gandomi, Kuan Shiong Khoo, Jeng-Kuei Chang
Summary: By using a highly efficient solid-phase microwave-assisted synthesis technique, nitrogen and boron doped graphene quantum dots (GQDs) were successfully synthesized. These doped GQDs were utilized as sensing probes for detecting pesticides and iron ions in aqueous solutions. The maximal B/C and N/C atomic ratios in the GQD structures reached as high as 28.6 and 86.4 at.%, respectively.
Article
Chemistry, Analytical
Anqi Huang, Xiaofang Yang, Ting Xia, Daichun He, Rui Zhang, Zongtao Li, Shengchun Yang, Yong Liu, Xiaodong Wen
Summary: A sulfur quantum dots fluorescent probe was developed for rapid and sensitive detection of excessive copper ion residue in traditional Chinese medicine. The probe showed excellent stability, high selectivity, and satisfactory results in the detection of actual samples.
MICROCHEMICAL JOURNAL
(2022)
Article
Biotechnology & Applied Microbiology
Yingnan Wang, Zhanbin Huang, Linlin Sheng, Mengmeng Zhao, Junyi Feng
Summary: Humic acid residue (HAS) was utilized to prepare an NH4H2PO4 modified material (NH4H2PO4-HAS) for the efficient adsorption of Pb2+ in aqueous solutions. The adsorption equilibrium was well fitted with the Langmuir isotherm model and the kinetic adsorption data followed the pseudo-second-order model. The thermodynamic parameters indicated that the adsorption process was spontaneous and more favorable at high temperatures. The adsorption mechanism involved physical adsorption, surface complexation adsorption, and precipitation of Pb2+ by NH4H2PO4-HAS.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Chemistry, Multidisciplinary
Luogang Xie, Yang Yang, Gaoshang Gong, Shiquan Feng, Dewei Liu
Summary: This study prepared surface-functionalized molybdenum disulfide quantum dots (MoS2 QDs) with high selectivity and sensitivity using a hydrothermal method, and improved their photoluminescence quantum yield. The detection limit for lead ions was 0.056 μM.
Article
Chemistry, Multidisciplinary
Tao Zhang, Jingpeng Zhou, Haiming Li, Jiliang Ma, Xing Wang, Haiqiang Shi, Meihong Niu, Yanshao Liu, Fengshan Zhang, Yanzhu Guo
Summary: This study proposes a simple, green and feasible method to construct afterglow materials by confining fluorescence carbon dots from lignin into silica. The obtained afterglow materials exhibit excellent phosphorescence behavior in both solid-state and aqueous solution, with a phosphorescence quantum yield of 5.97% and a lifetime of 834 ms. Additionally, a multi-modal information encryption strategy based on the phosphorescence characteristics of the afterglow materials is designed.
Article
Environmental Sciences
Gabriela Buema, Maria Harja, Nicoleta Lupu, Horia Chiriac, Loredana Forminte, Gabriela Ciobanu, Daniel Bucur, Roxana Dana Bucur
Summary: The study demonstrates that the fly ash from the CET II Holboca power plant in Romania can be utilized for producing new materials applicable for environmental decontamination. Through various characterization and adsorption experiments, it was found that the fly ash treated with NaOH has a high adsorption capacity for copper ions, and the adsorption process follows a chemisorption mechanism.
Article
Multidisciplinary Sciences
Shuanglei Xie, Chuanqi Pan, Yuan Yao, Xianglin Yu, Ze Xu, Weidong Yuan, Yi Zhang, Ning Guo, Xue Li, Xuefei Mao, Shengqiang Xiao, Junbo Li, Yanbing Guo
Summary: Hydrogen-substituted graphdiyne (HsGDY) was successfully fabricated and employed as an effective adsorbent to remove lead ions from sewage and lead-containing blood. HsGDY exhibited a high adsorption capacity of lead, approximately five times larger than that of graphdiyne (GDY), due to its unique hexagonal hole and stack mode that allows for more lead adsorption. The strong bonding of lead atom on HsGDY and the easy regeneration process further enhance its performance as a promising adsorbent for lead removal.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Chemistry, Physical
Juan Yang, Pei Li, Zailing Song, Jie Li, Huan Yang, Fan Yan, Lu Li, Can Xu, Junlang Chen, Liang Chen
Summary: In this study, graphene quantum dots (GQDs) modified by scandium ions (Sc3+) were prepared to improve their photoluminescence (PL) properties in aqueous solution containing heavy metal ions. It was found that GQDs modified by other metal ions, such as aluminum (Al3+) and gallium (Ga3+), also exhibited similar results, confirming the universality of this approach.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Yiting Zheng, Qingxuan Li, Chenfei Wang, Ming Su
Summary: This paper introduces a new method for enhancing the sensitivity of fluorescence detection of lead ions in water by utilizing the volume reduction of hydrogels upon dehydration. The method is low-cost, easy to operate, and highly sensitive, making it suitable for detecting lead ions in drinking water.
Article
Spectroscopy
Kunfeng Liu, Chongshu Xia, Yahui Guo, Hang Yu, Yunfei Xie, Weirong Yao
Summary: Surface modification of N, S-CDs was performed using cysteine and polyethylenimine as raw materials. The prepared N, S-CDs exhibited excitation-independent in the range of 300-380 nm. A fluorescence sensor with high sensitivity and selectivity to detect Hg2+ was developed based on the quenching effect of Hg2+ on the fluorescence intensity of N, S-CDs.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Biotechnology & Applied Microbiology
Jacques R. Njimou, Martin Pengou, Herve K. Tchakoute, Mary Sieugaing Tamwa, Chedly Tizaoui, Ulrich Fannang, Patrick N. Lemougna, Charles P. Nanseu-Njiki, Emmanuel Ngameni
Summary: The novel adsorbent synthesized from phosphate-based geopolymer cement composite material showed high adsorption capacity for lead removal from aqueous solutions, making it a promising option for developing countries. The experimental results indicated that the adsorption equilibrium and rate were well described by different models, with a maximum adsorption capacity of 0.38 mmol g(-1) from the Langmuir isotherm. The phosphate-based geopolymer cement composite can be a suitable solution for removing heavy metals from wastewaters.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2021)