Article
Chemistry, Physical
Tzu-Yang Cheng, Feng-Pai Chou, Sheng-Cih Huang, Chin-Yuan Chang, Tung-Kung Wu
Summary: This article describes the synthesis of stable S,N co-doped graphene oxide quantum dots (S,N-GOQDs) and their optoelectrical applications. The S,N-GOQDs exhibit high yield and excitation-independent emission, making them suitable for use as emitters in light-emitting diode devices and as photocatalysts for energy conversion.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Inorganic & Nuclear
Xirui Miao, Jinna Bai, Yidan Liang, Menglei Sun, Yuanqing Sun, Xudong Yang
Summary: A novel gold and copper bimetallic nanocluster-doped chitosan fluorescent composite film was successfully prepared by synthesizing gold and copper bimetallic nanoclusters emitting strong red fluorescence and utilizing a solution casting method. The composite film showed stable optical properties and could be stored for a long time. It exhibited strong and bright red fluorescence, making it suitable for real-time detection of Cr(vi), with a low detection limit (0.26 ppb) and satisfactory results in actual water samples. Its portability, high selectivity, and sensitivity also enable its extension to chemical and food detection.
DALTON TRANSACTIONS
(2023)
Article
Engineering, Environmental
Miriam Rangel, Sarvagya Saluja, V. Barba, J. S. Perez-Huerta, V. Agarwal
Summary: Dual-emissive water-dispersible sulfur-doped carbon dots (S-CDs) were synthesized from canola oil and exhibited wavelength-dependent and independent emissions. These S-CDs showed selectivity and linear turn-off fluorescence in the presence of Cr(VI) and acetone, making them potential nanosensors. The emission spectrum of S-CDs red-shifted in the presence of acetone, with a concentration-dependent response. The nanoparticles were also effective in reducing Cr(VI) to Cr(III) and could be incorporated into a polymer matrix for water decontamination.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Naveen Kumar Reddy Bogireddy, Sergio Eduardo Sotelo Rios, Vivechana Agarwal
Summary: A simple one-step synthesis method was optimized to obtain dual-emissive carbon dots (DECDs) with intriguing characteristics, showing high stability and potential for various applications.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Yang Chen, Huijing Cui, Mao Wang, Xudong Yang, Shujie Pang
Summary: A fluorescent probe based on carbon dots (CDs) with low cost, low environmental impact, high stability, and good water solubility was developed for the detection of Cr(VI). Unlike most previous sensors, this probe enhances fluorescence rather than quenching it, and has a very low detection limit.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Analytical
Guiqiao Wang, Shurong Zhang, Jinzhi Cui, Wensu Gao, Xing Rong, Yaxin Lu, Canzhu Gao
Summary: A novel ionic sensor based on nitrogen-doped carbon quantum dots (N-CQDs) was developed for sensitive detection of hypochlorite ions and dichromate ions by fluorescence spectrometry. The sensor exhibited high fluorescence quantum yield, broad linear detection range, and good reliability in actual water sample analysis.
ANALYTICA CHIMICA ACTA
(2022)
Article
Environmental Sciences
Dong Chen, Xiaohu Du, Kunyuan Chen, Guangrong Liu, Xin Jin, Chuanfu Song, Feidei He, Qiang Huang
Summary: FeS nanoparticles loaded on nitrogen-doped biochar were successfully prepared by pyrolyzing coffee husks treated with Mohr's salt. The FeS/NBC composite exhibited a synergistic scavenging effect of Cr(VI) and showed promising potential for chromium pollution remediation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Jianhua Qu, Weihang Zhang, Fuxuan Bi, Shaojuan Yan, Xuemei Miao, Bo Zhang, Yifan Wang, Chengjun Ge, Ying Zhang
Summary: Nitrogen-doped biochar loaded with FeS (FeS@NBCBM) synthesized through two-step ball milling processes showed superior adsorption capacity for Cr(VI) and tetracycline, with stable performance and innovative decorating method for water purification.
ENVIRONMENTAL POLLUTION
(2022)
Article
Engineering, Environmental
Le Yu, Junyan Zhou, Zhaoyi Xu, Shourong Zheng
Summary: The newly designed Pt@NCMK-3 catalyst shows high activity and stability in eliminating Cr(VI) pollution simultaneously at near neutral pH, with superior breakthrough performance under experimental conditions.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Juan Meng, Shiqian Li, Ling Ding, Chuang Zhou, Rui Jiang, Qingtian Zhang, Zhengzai Cheng, Mario Gauthier, Ya Hu, Lin Wu
Summary: In this study, nitrogen-doped carbon dots (N-CDs) were successfully prepared as a fluorescent chemosensor for Cr(VI) detection in water. The N-CDs exhibited excellent selectivity, sensitivity, reproducibility, and stability, making them a promising candidate for accurate Cr(VI) detection.
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
(2022)
Article
Engineering, Environmental
Xueqi Chen, Zihui Song, Bingnan Yuan, Xiaojuan Li, Shaopeng Li, Tat Thang Nguyen, Minghui Guo, Zhanhu Guo
Summary: A novel hydrogel material, NCDs-CNF/CSgel, was developed for the simultaneous detection and adsorption of Cu(II) and Cr(VI) in water, showing superior fluorescence response for Cr(VI) and high adsorption capacities for both heavy metal ions.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Multidisciplinary Sciences
Galal Magdy, Amira A. Al-enna, Fathalla Belal, Ramadan A. El-Domany, Ahmed M. Abdel-Megied
Summary: In this study, highly fluorescent sulfur and nitrogen doped carbon quantum dots were used as nanosensors for the direct estimation of gliclazide and saxagliptin. The method does not require any pre-derivatization steps and the mechanism of interaction between the quantum dots and the drugs was studied.
ROYAL SOCIETY OPEN SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Terefe Tafese Bezuneh, Tadesse Haile Fereja, Haijuan Li, Yongdong Jin
Summary: In this study, N and S codoped highly fluorescent graphene quantum dots (N/S-GQDs) were prepared using a simple one-step solid-phase pyrolysis synthesis procedure. The as-synthesized quantum dot exhibited blue fluorescence emission dependent on excitation wavelength, with a relative quantum yield of about 22%, and showed good biocompatibility, high water dispersibility, and excellent stability under extreme conditions (ionic strength, pH, and temperature). The applicability of the as-synthesized quantum dot was demonstrated through solution-and paper-based fluorescence (FL) detection modes for Cr(VI) detection, with lower limit of detection (LOD) values of 0.01 and 0.4 μM, respectively. The paper-and solution-based FL sensors constructed in this study proved the feasibility of sensitive, cost-effective, and on-site detection of Cr(VI).
Article
Chemistry, Analytical
Xia Zhao, Zanling Huang, Wanying Zhang, Peipei Li, Fushen Lu, Liangsheng Hu
Summary: The sensor reported in this study utilizes N-doped carbon coated TiC nanofiber arrays for detecting Cr(VI) with excellent sensitivity, low detection limit, wide linear range, and good selectivity.
Article
Polymer Science
Hua Zeng, Zhiyuan Hu, Chang Peng, Lei Deng, Suchun Liu
Summary: A composite hydrogel of CS/CNCD with strong sorption and sensitive detection abilities for Cr(VI) was developed. The hydrogel, based on natural cellulose nanocrystals and carbon dots, demonstrated efficient adsorption capacity and quantification for Cr(VI) even after repeated regenerations.