4.6 Article

High photoluminescent nitrogen-doped carbon dots with unique double wavelength fluorescence emission for cell imaging

Journal

MATERIALS LETTERS
Volume 216, Issue -, Pages 84-87

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2018.01.002

Keywords

Carbon materials; Luminescence; Carbon dots; Double emission; Cell imaging

Funding

  1. National Natural Science Foundation of China [21576071, 21776061, U1504215]
  2. State Key Laboratory of Fine Chemicals [KF1514]

Ask authors/readers for more resources

High photoluminescent (PL) nitrogen-doped carbon dots (N-CDs) have been synthesized using ferric ammonium citrate (FAC) and urea as raw materials by simple one-pot hydrothermal process. The N-CDs possess bright blue fluorescence (centred at 450 nm; 36.2% quantum yield) and green fluorescence (centred at 530 nm; 47.6% quantum yield) only by adjusting the excitation wavelength from 310 nm to 510 nm. The N-CDs exhibited high N content of 32.81 wt%, low cytotoxicity, and good PL stability at different pH values, ion strengths and temperature, respectively. As-prepared N-CDs were explored for cell imaging with great biocompatibility. The remarkable properties of N-CDs indicated their potential toward sensing and biological applications. (C) 2018 Elsevier B.V. All rights reserved.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

Article Engineering, Environmental

Single-atom Mn anchored on N-doped graphene oxide for efficient adsorption-photocatalytic degradation of sulfanilamide in water: Electronic interaction and mineralization pathway

Honghong Lyu, Pin Li, Jingchun Tang, Weixin Zou, Pengfei Wang, Bin Gao, Lin Dong

Summary: The synergy between adsorption and photocatalysis provides an ideal green technology for treating antibiotic pollution in water. In this study, single-atom Mn anchored on N-doped graphene oxide (Mn-NGO) was synthesized and showed enhanced adsorptive-photocatalytic removal of aqueous sulfanilamide (SNM). The mechanisms behind the enhanced performance were revealed, including upgraded electronic structures, increased adsorption and polarizing of SNM, and the generation of key reaction intermediates.

CHEMICAL ENGINEERING JOURNAL (2023)

Review Environmental Sciences

Recovery of phosphorus from wastewater: A review based on current phosphorous removal technologies

Yulin Zheng, Yongshan Wan, Yue Zhang, Jinsheng Huang, Yicheng Yang, Daniel C. W. Tsang, Hailong Wang, Hao Chen, Bin Gao

Summary: This study provides a comprehensive overview of the latest developments in phosphorus removal technologies in wastewater treatment. The analysis focuses on the mechanisms, removal efficiencies, and recovery potential of four typical treatment processes, as well as comparing their design principles, feasibility, operation parameters, and pros & cons. The study also proposes perspectives and future research directions for phosphorus removal and recovery in the context of sustainable water treatment technology.

CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY (2023)

Article Environmental Sciences

Microwave biochar produced with activated carbon catalyst: Characterization and adsorption of heavy metals

Guangdou Qi, Zhifei Pan, Xueyang Zhang, Shuaishuai Chang, Hongbo Wang, Min Wang, Wei Xiang, Bin Gao

Summary: Microwave biochar produced with activated carbon catalyst shows excellent potential in removing heavy metals from waste water due to its high specific surface area and adsorption capacity. The optimum pH value for heavy metal removal is between 5-6, and Pb2+ exhibits the strongest affinity. The adsorption process is mainly explained by monolayer adsorption and chemical adsorption mechanisms. Complexation with oxygen-containing functional groups and precipitation with carbonate are the predominant adsorption mechanisms.

ENVIRONMENTAL RESEARCH (2023)

Article Engineering, Environmental

Effects of biofilms on the retention and transport of PFOA in saturated porous media

Jiaju Fu, Bin Gao, Hongxia Xu, Shefeng Hao, Jinghua Ren, Jichun Wu, Yuanyuan Sun

Summary: This study investigated the impact of biofilm, specifically Gram-positive Bacillus subtilis (BS), Gram-negative Pseudomonas aeruginosa (PA), and wild microbiota (WM), on the transport of perfluorooctanoic acid (PFOA) in saturated sand columns. The results showed that biofilm increased the retention of PFOA, but the effects varied depending on the bacterial species. In addition, the influence of ionic strength on PFOA transport differed among the biofilm types. The findings of this study have important implications for the risk assessment and remediation of PFOA contamination.

JOURNAL OF HAZARDOUS MATERIALS (2023)

Review Engineering, Environmental

Degradation of organic pollutants from water by biochar-assisted advanced oxidation processes: Mechanisms and applications

Tao Jiang, Bing Wang, Bin Gao, Ning Cheng, Qianwei Feng, Miao Chen, Shengsen Wang

Summary: Biochar has shown great potential in environmental remediation due to its low cost, large specific surface area, porosity, and high conductivity. However, there is still a need to further explore the effects of biochar properties on catalytic performance and fill in the knowledge gaps in the reaction mechanisms of biochar-assisted advanced oxidation processes. Additionally, there is a lack of regeneration methods for biochar catalysts. Therefore, it is necessary to systematically review the latest research progress of biochar-assisted advanced oxidation processes in the treatment of organic pollutants in water.

JOURNAL OF HAZARDOUS MATERIALS (2023)

Article Engineering, Environmental

Granular limestone amended sand filters for enhanced removal of nanoplastics from water: Performance and mechanisms

Xiaohui Li, Yuanyuan Zhang, Hongxia Xu, Yuanyuan Sun, Bin Gao, Jichun Wu

Summary: Effluent from wastewater treatment plants is a major source of nanoplastics in the environment. This study found that integrating granular limestone into rapid sand filter systems can greatly enhance nanoplastics removal from water. The higher removal efficiency of nanoplastics by limestone is attributed to its chemical composition, surface heterogeneity, and roughness.

WATER RESEARCH (2023)

Review Environmental Sciences

Pros and Cons of Biochar to Soil Potentially Toxic Element Mobilization and Phytoavailability: Environmental Implications

Sabry M. Shaheen, Ahmed Mosa, Parimala Gnana Soundari Arockiam Jeyasundar, Noha E. E. Hassan, Xing Yang, Vasileios Antoniadis, Ronghua Li, Jianxu Wang, Tao Zhang, Nabeel Khan Niazi, Muhammad Shahid, Gaurav Sharma, Daniel S. S. Alessi, Meththika Vithanage, Zeng-Yei Hseu, Ajit K. K. Sarmah, Binoy Sarkar, Zengqiang Zhang, Deyi Hou, Bin Gao, Hailong Wang, Nanthi Bolan, Joerg Rinklebe

Summary: This study critically reviews the effects of biochar (BC) on the mobilization, phytoextraction, phytostabilization, and bioremediation of potentially toxic elements (PTEs) in contaminated soils. The potential mechanisms of interaction between BC and PTEs in soils are discussed in detail. The review demonstrates the contradictory effects of BC on PTE mobilization and highlights the opportunities for using BC as a mobilizing agent to enhance phytoremediation of PTE-contaminated soils.

EARTH SYSTEMS AND ENVIRONMENT (2023)

Article Engineering, Chemical

Removal of aqueous eriochrome blue-black R by novel Na-bentonite/hickory biochar composites

Xiaodong Yang, Xueqin Shao, Jin Tong, Jinfeng Zhou, Ying Feng, Rui Chen, Qiang Yang, Ye Han, Xizhen Yang, Lili Wang, Xuewen Ma, Zhongqing Fan, Zhi Song, Andrew R. Zimmerman, Bin Gao

Summary: This study investigated a facile and environmentally-friendly method to synthesize a porous Na-bentonite/hickory-biochar composite sorbent from hickory waste biomass. The composite sorbents showed increased microporosity and O-containing functional groups. The composite prepared with 10% biomass by weight and at 600°C exhibited the highest adsorption capacity for Eriochrome Blue Black R (EBBR) anionic organic dyes.

SEPARATION AND PURIFICATION TECHNOLOGY (2023)

Article Chemistry, Physical

Enhanced photocatalytic toluene oxidation on CN species modified TiO2: Nitrogen doping state and anti-inactivation mechanism

Haiqin Wan, Xiaoshan Zeng, Bingqing Shi, Qiuhui Qian, Qing Tong, Weixin Zou, Bin Gao, Lin Dong

Summary: The photocatalytic oxidation of toluene is improved by introducing cheap carbon and nitrogen species on the surface of titanium dioxide. UT1 photocatalyst showed the best performance with a conversion rate of around 90% and a mineralization rate of 85% for toluene under light (λ≥400 nm, RH= 20%) for at least 720 minutes. The excellent activity of UT1 photocatalyst is attributed to the presence of interstitial nitrogen and CN species with triple bonds.

APPLIED CATALYSIS A-GENERAL (2023)

Article Agricultural Engineering

Potassium permanganate modification of hydrochar enhances sorption of Pb(II), Cu(II), and Cd(II)

Yue Zhang, Yongshan Wan, Yulin Zheng, Yicheng Yang, Jinsheng Huang, Hao Chen, Guixiang Quan, Bin Gao

Summary: Hydrochars derived from hydrothermal carbonization of hickory wood, bamboo, and wheat straw were modified with potassium permanganate for effective sorption of heavy metals. The modified wheat straw hydrochar (WSHyC-0.2KMnO(4)) exhibited the highest adsorption capacity, attributed to its large specific surface area, abundant surface oxygenic functional groups, and significant presence of MnOx microparticles. Batch adsorption experiments demonstrated that WSHyC-0.2KMnO(4) had a faster adsorption rate and much higher adsorption capacity (12-17 times) for Pb(II), Cd(II), and Cu(II) compared to WSHyC, due to increased OCFG and MnOx microparticles on its surface facilitating ion exchange, electrostatic interactions, and complexation mechanisms.

BIORESOURCE TECHNOLOGY (2023)

Article Engineering, Environmental

Novel post-treatment of ultrasound assisting with acid washing enhance lignin-based biochar for CO2 capture: Adsorption performance and mechanism

Wenping Cao, Haoliang Xu, Xueyang Zhang, Wei Xiang, Guangdou Qi, Lei Wan, Bin Gao

Summary: Lignin biochar was effectively modified using acid washing and ultrasound treatment to enhance its CO2 sorption capacity. The treatment improved the surface cleanliness and porosity of the biochar, resulting in increased specific surface areas and micropore volumes. The post-treated biochar exhibited high CO2 uptake due to its developed micropore structure, and adsorption analysis revealed multilayer physical adsorption as the main mechanism. The acid washing and ultrasound treatment technique showed great potential for CO2 capture with its high adsorption capacity, excellent reusability, and selectivity.

CHEMICAL ENGINEERING JOURNAL (2023)

Article Environmental Sciences

Biochar inhibited hydrogen radical-induced Cd bioavailability in a paddy soil

Taige Li, Wenjing Li, Shan Yu, Chenhao Zhao, Longfei Liu, Yuncong C. Li, Bin Gao, Hao Chen, Bing Wang, Xiaozhi Wang, Shengsen Wang, Jorg Rinklebe

Summary: In this study, hydrogen radicals were found to be a new pathway for the production of hydroxyl radicals, which increased the dissolution of cadmium sulfide and the solubility of Cd in paddy soils. Soil incubation experiments showed that the bioavailable Cd concentrations in flooded paddy soils increased by 8.44% after 3 days of aeration. The presence of hydrogen radicals in aerated soil sludge was observed for the first time. Electrolysis experiments confirmed the association of CdS dissolution with free radicals. The application of biochar decreased soil DTPA-Cd by 22-56% through multiple mechanisms, including the quenching of radicals and stimulation of Fe/S-reducing bacteria.

SCIENCE OF THE TOTAL ENVIRONMENT (2023)

Article Engineering, Chemical

Hydrochar effectively removes aqueous Cr(VI) through synergistic adsorption and photoreduction

Yidan Luo, Yuanwang Lan, Xuzhou Liu, Mingshan Xue, Longshuai Zhang, Zuozhu Yin, Xiaoshu He, Xibao Li, Jun Yang, Zhen Hong, Mu. Naushad, Bin Gao

Summary: In this study, three types of hydrochars were synthesized from agricultural and forestry residuals for the synergistic adsorption and photoreduction of hexavalent chromium. These hydrochars exhibited strong adsorption capability and effectively removed hexavalent chromium under various conditions.

SEPARATION AND PURIFICATION TECHNOLOGY (2023)

Article Chemistry, Multidisciplinary

Remarkable synergy between sawdust biochar and attapulgite/diatomite after co-ball milling to adsorb methylene blue

Fei Jiang, Feiyue Li, Andrew R. Zimmerman, Zhongpu Yu, Licheng Ji, Chengcheng Wei, Xueyang Zhang, Bin Gao

Summary: Biochar, attapulgite, and diatomite were co-ball milled to prepare mineral-biochar composites for wastewater treatment. The composites showed better adsorption capacity for methylene blue compared to ball milled biochar and mineral alone. The 10% composites of attapulgite-biochar and diatomite-biochar had the highest adsorption capacities, which were 2.7 and 2.3 times that of ball milled biochar, respectively. The improved adsorption is attributed to the oxygen-containing functional groups and cation exchange capacity of the composites.

RSC ADVANCES (2023)

Article Environmental Sciences

Bio-assembled MgO-coated tea waste biochar efficiently decontaminates phosphate from water and kitchen waste fermentation liquid

Chuchu Feng, Lan Zhang, Xiu Zhang, Jingyu Li, Yimeng Li, Yaru Peng, Yuan Luo, Ronghua Li, Bin Gao, Mohamed A. Hamouda, Ken Smith, Esmat F. Ali, Sang Soo Lee, Zengqiang Zhang, Joerg Rinklebe, Sabry M. Shaheen

Summary: The needle-like MgO particle coated tea waste biochar composite (MTC) was prepared and used as an adsorbent for removing phosphorus (P) from synthetic solution and kitchen waste fermentation liquid. The maximum P sorption capacities of MTC were 58.80 mg g(-1) from the solution at pH 7 and 192.8 mg g(-1) from the fermentation liquid at pH 9. MTC exhibited different P sorption mechanisms in different environments, making it effective for P removal from aqueous environments, especially fermentation liquids.

BIOCHAR (2023)

Article Materials Science, Multidisciplinary

F-doped Co3O4 with Pt-like activity and excellent stability for hydrogen evolution reaction in alkaline media

Deyong Zheng, Huihui Jin, Yucong Liao, Pengxia Ji

Summary: In this study, a highly stable and efficient catalyst, fluorine-doped Co3O4 (F-Co3O4), was developed for hydrogen production by water electrolysis. The F-Co3O4 catalyst exhibited a remarkable reduction in overpotential and demonstrated excellent stability for over 100 hours.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Effect of the addition of Cu6Sn5 nanoparticles on the growth of intermetallic compounds at the interfaces of Sn3.0Ag0.5Cu solder joints

Ziwen Lv, Jintao Wang, Fengyi Wang, Jianqiang Wang, Fuquan Li, Hongtao Chen

Summary: Adding Cu6Sn5 nano particles can effectively inhibit the overgrowth of intermetallic compounds at the interfaces of solder joints in electronic devices, providing a solution to this issue. A new growth mechanism of intermetallic compounds at the interfaces was identified.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

BiOI/AgI/Ag plasmonic heterostructure for efficient photoelectrochemical water splitting

Jun Wang, Jiawei Chen, Wanru Liao, Fangyang Liu, Min Liu, Liangxing Jiang

Summary: A BiOI/AgI/Ag plasmonic heterostructure photocathode was successfully designed through electrodeposition, ion-exchange, and illumination methods. This photocathode exhibits superior performance in photoelectrochemical water splitting.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Ni@O-doped carbon Mott-Schottky heterojunctions to enhance sulfur conversion kinetics

Xiaoxiao Liu, Xianxian Zhou, Xiaotao Ma, Qinbo Yuan, Shibin Liu

Summary: In this study, the authors propose a method to accelerate the reaction of polysulfides in lithium-sulfur batteries using a Ni@OC Mott-Schottky heterojunction as a catalyst. The experimental results demonstrate that the charge redistribution at the Ni@OC interface accelerates electron transfer and enhances catalytic activity, leading to improved reaction kinetics and battery performance.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Effect of fixture boundary conditions for low-velocity impact: A focus on composites with different matrix and fibers

Dayou Ma, Mohammad Rezasefat, Joziel Aparecido da Cruz, Sandro Campos Amico, Marco Giglio, Andrea Manes

Summary: The matrix has a significant effect on the impact resistance of composite materials. Replacing a brittle polymer with a more flexible one can improve impact resistance, but it poses challenges to standard testing methods. This study designs a new fixture for testing the low-velocity impact of soft composites and investigates the effect of the fixture on the mechanical performance.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Synergistic effect of defects and heterostructures endowing bronze titanium dioxide with superior lithium storage performances

Lingchang Wang, Qihang Yang, Huzhen Li, Ming Wei, Qian Wang, Zhenzhong Hu, Mengmeng Zhen

Summary: Bronze titanium dioxide (TiO2(B)) is a promising anode material for lithium-ion batteries due to its high specific capacity. However, its practical applications are hindered by poor conductivity and limited electrochemical kinetics. In this study, TiO2(B)-carbon nanosheets heterostructures are synthesized to enhance the cycling performance and rate capability of TiO2(B).

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Sustained electromagnetic parameters of barium ferrite and epoxy nanocomposites for patch antenna miniaturization over GHz frequency range

Atul Thakur, Ritesh Verma, Ankush Chauhan, Fayu Wan, Preeti Thakur

Summary: In this study, BaFe12O19 and BaFe12O19: Epoxy (50:50) nanocomposites were synthesized using the co-precipitation method. The structural information and material properties, such as crystallite size and electrical conductivity, were characterized by XRD, FESEM, EDX, and TEM techniques.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

In-situ construction of CoS2@NC hierarchical binder-free cathode for advanced Li-CO2 batteries

Jingyu Wu, Xinyan Ma, Yong Yang

Summary: A well-defined CoS2@NC(CS-500) hierarchical binder-free catalyst cathode is constructed through in-situ grown of ZIF-67 on carbon cloth and high-temperature carbonization. The cathode shows excellent reaction kinetics and electrochemical performance, providing inspiration for developing advanced Li-CO2 battery catalysts.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

K5Eu1-xHox(MoO4)4: Structures and luminescence properties

Svetlana M. Posokhova, Vladimir A. Morozov, Kirill N. Boldyrev, Dina Deyneko, Erzhena T. Pavlova, Bogdan I. Lazoryak

Summary: This study explores the impact of synthesis method and composition on the structure and luminescence properties of K5Eu1-xHox(MoO4)4 with the palmierite-type matrix. The co-doping of Eu3+ and Ho3+ ions plays a critical role in manipulating charge transfer and luminescence efficiency in the visible and infrared regions.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Benzonitrile/pyridylbenzoimidazole hybrid electron-transport material for efficient phosphorescence and TADF OLEDs

Jian Wang, Yeting Tao, Jingsheng Wang, Youtian Tao

Summary: A new electron-transport material iTPyBI-CN is developed through non-catalytic C-N coupling reaction. It exhibits better electroluminescence efficiency in organic light-emitting diodes compared to the commercial material TPBI, due to its twisted geometry and higher energy levels.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Microscopic characteristics and thermodynamic property changes in limestone under high-temperature treatment

Tao Zhu, Feng Huang, Shuo Li, Yang Zhou

Summary: This article combines XRD analysis and microscopic structural observation to investigate the changes in limestone after high-temperature treatment. It finds that 500 degrees C is the critical temperature for crystalline and spatial arrangement changes in limestone, and the thermal conductivity, specific heat capacity, and heat storage coefficient gradually decrease after thermal treatment.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Novel synthesis of ZnO nanostructure from galvanization waste for antibacterial application

Muhammad Haekal Habibie, Fransiska Sri Herwahyu Krismastuti, Abdi Wira Septama, Faiza Maryani, Vivi Fauzia

Summary: This study focuses on the synthesis of zinc oxide nanostructure from zinc recovered from galvanization ash and highlights its potential as a sustainable source of zinc and as an antibacterial agent.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Biomimetic mineralization engineered phycocyanin with improved stability and antioxidantive activity under environmental stress

Jingyi Li, Yixin Xing, Wei Gu, Shousi Lu

Summary: In this study, PC@CaP microparticles were fabricated using biomimetic mineralization. The results showed that under environmental stress, PC@CaP exhibited improved stability and antioxidative activity, indicating its potential use in high-added value fields.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

ZIF-8 nanoparticles combined with fibroin protein co-modified TiO2 nanotube arrays to construct a drug sustained-release platform

Yan Liu, Shunyou Chen

Summary: In this study, TNTs were used as a drug carrier and modified with ZIF-8 and silk fibroin to obtain a new drug loading platform. The results showed that this drug-loaded platform had a good drug release effect in vitro and could promote cell proliferation and osteogenic differentiation.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Observation of stacking faults in ε-phase InSe crystal

Chunhui Zhu, Wentao Wang, Qing Zhen, Xinning Huang, Shixin Li, Shaochang Wang, Xiaoping Ma, Xiaoxia Liu, Yalong Jiao, Kai Sun, Zhuangzhi Li, Huaixin Yang, Jianqi Li

Summary: A type of stacking fault is revealed in e-InSe crystal, which is associated with a small stacking-fault energy and shows exceptional plasticity.

MATERIALS LETTERS (2024)