Facile one-pot synthesis of long-term thermally stable CDs@AlOOH toward white-light illumination

Wu, Jiaming; Wang, Shuxian; Liu, Shuxin; Ma, Shuwei; Jing, Guojian; Hu, Yueling; Wang, Meng; Ye, Zhengmao; Cheng, Xin

doi:10.1039/c9tc03632f

Cited by 10 publications

(3 citation statements)

References 59 publications

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“…In Figure , phytic acid was used as a precursor and a doping source of the CDs, graphene oxide (GO) was used to anchor CDs, and after a heating treatment without breaking the morphology of CDs, the composite showed excellent oxygen reduction reaction (ORR) performance with a high P‐doping content due to the anchoring mechanism of CDs on the substrate. And in Wang's work, [ 131 ] to synthesize high‐efficient matrix encapsulated carbon dots materials and to avoid preparation complexity, aluminum glycine was utilized as a precursor and followed with a heating treatment in different atmospheres through the one‐step synthesis of CDs doped boehmite composite (CDs@AlOOH). The uniformly dispersed CDs anchored on AlOOH effectively reduced the self‐quenching effect of CDs and enhanced the fluorescence properties.…”

Section: Novel Synthesis Of Cds/xmentioning

confidence: 99%

Structure and Interface Modification of Carbon Dots for Electrochemical Energy Application

Cheng

Xiang

Guo

et al. 2021

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Carbon dots (CDs) as new nanomaterials have attracted much attention in recent years due to their unique characteristics. Notably, structure and interface modification (carbon core, edge, defects, and functional groups) of CDs have been considered as valid methods to regulate their properties, which contain electron transfer effect, electrochemical activity, fluorescence luminescent, and so on. Additionally, CDs with ultrasmall size, excellent dispersibility, high specific surface area, and abundant functional groups can guarantee positive and extraordinary effects in electrical energy storage and conversion. Therefore, CDs are used to couple with other materials by constructing a special interface structure to enhance their properties. Here, diverse structural and interfacial modifications of CDs with various heteroatoms and synergy effects are systematically analyzed. And not only several main syntheses of CDs‐based composites (CDs/X) are summarized but also the merit and demerit of CDs/X in electrical energy storage are discussed. Finally, the applications of CDs/X in energy storage devices (supercapacitors, batteries) and electrocatalysts for practical applications are discussed. This review mainly provides a comprehensive summary and future prospect for synthesis, modification, and electrochemical applications of CDs.

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Section: Novel Synthesis Of Cds/xmentioning

confidence: 99%

Structure and Interface Modification of Carbon Dots for Electrochemical Energy Application

Cheng

Xiang

Guo

et al. 2021

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“…[11] Nevertheless, due to the uniformity of surface functional groups, the lack of diversified active sites and low quantum yield limit the application development. [12] Therefore, it is necessary to change the surface state of CDs through functionalization to expand the scope of application, which has become the focus of current research. [13,14] In particularly, surface modifications can improve the targeting selectivity of CDs Parker equation verified that the process was internal filtration effect (IFE) and fluorescence resonance energy transfer (FRET), respectively.…”

Section: Introductionmentioning

confidence: 99%

Cyclodextrin Functionalized Carbon Dots Using IFE and FRET Dual Mechanism for Sequential Detection of Morin and Al³⁺

Zang

Yan

et al. 2021

Part & Part Syst Charact

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by introducing specific recognition groups while significantly improving their optical properties and biocompatibility. [15,16] Surface modification has emerged as a powerful strategy for optimizing the performance of CDs and regulating the surface state.Morin as a polyhydroxy flavonoid is widely found in daily foods and thus is ingested to supplement the body. It exerts a variety of beneficial effects in the body, including scavenging free radicals, fighting inflammation, and protecting nerves, and even has a blocking effect on the growth and proliferation of cancer cells. It is commonly used in clinical practice to treat stomach diseases, chronic inflammatory diseases, coronary heart diseases and cancer. [17][18][19][20] However, studies have shown that high doses of morin can lead to pro-oxidative effects on cells, affecting the absorption of substances, drug metabolism and even DNA damage. On the other hand, heavy metal Al 3+ is an important component often used in food packaging, paper, and pharmaceutical industries. [21][22][23][24] According to the World Health Organization study, the tolerable intake of Al 3+ in the human body is estimated to be less than 4 mg per day. [25] The long-term accumulation of excessive Al 3+ can lead to kidney failure and pose a serious threat to the bones, brain and nervous system. In view of the above, a series of analytical methods have been established for the detection of morin and Al 3+ , including high performance liquid chromatography, electrochemical analysis and gas chromatography. [26,27] The above methods have limitations such as complicated pre-treatment, expensive and difficult operation, while the fluorescence method can overcome the defects of existing methods and establish a simple, rapid and reliable detection method with far-reaching practical application prospects.Based on the above, novel cyan Z-CDs were synthesized by surface modification of CDs through amidation reaction using β-CD (Scheme 1). In particularly, β-CD increased the spatial site resistance between CDs, which effectively suppressed the aggregation quenching effect and improved the luminescence intensity, and this results in excellent dispersion, stability and superior fluorescence properties of Z-CDs. Furthermore, the addition of morin could effectively quenched the fluorescence of Z-CDs and Al 3+ could make rapid recovery of the fluorescence of the Z-CDs-morin. The spectral characterization and Carbon dots (CDs) are emerging photoluminescent materials with excellent optical properties. However, the lack of active sites in primitive CDs has limited their development applications. Herein, functionalized carbon dots (Z-CDs) are successfully prepared by surface modification of CDs with mono (6-amino-6-deoxy) cyclodextrin (β-CD). The introduction of β-CD increases the spatial potential resistance between CDs, which effectively reduces the self-quenching effect. Moreover, the conjugated domains of Z-CDs are expanded, which improves the optical properties with a quantum yield of 48.74%. Z-CDs are ab...

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“…[ 13 ] CDs are broadly used in sensors, [ 14,15 ] cell imaging, [ 16,17 ] fluorescent ink, [ 18 ] and drug delivery [ 19 ] due to their excellent stable luminescence, low cost, facile surface modification, tunable emission, nontoxicity, water solubility, and biocompatibility. [ 20,21 ] Several published papers have discussed the application of CDs in adsorption; Seema and colleagues [ 22 ] reported a polyurethane sponge embedded in polydimethylsiloxane and CDs to investigate its oil absorption performance. The results showed that the addition of CDs can significantly improve the oil absorption capacity.…”

Section: Introductionmentioning

confidence: 99%

Carbon dots crosslinked chitosan/cellulose sponge capture of methyl blue by an adsorption process

Yuan

Zhu

et al. 2021

Luminescence

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For environmental protection, organic dyes and solvents of industrial wastewater must be eliminated. Here, a citric acid‐based carbon dots (CA‐CDs) crosslinked chitosan/microcrystalline cellulose (CS/MCC/CA‐CDs) sponge was synthesized to study its adsorption performance for methyl blue (MB) dye. The morphology of the sponge was a tangled fibre with a bundle formed by hydrogen bonds between CA‐CDs and the CS/MCC composite matrix. The abundant amount of tangled fibre bundle units can offer plentiful active adsorption sites to collect the dye molecules. The adsorption capacity of the CS/MCC/CA‐CDs sponge toward MB was 306.8 mg/g at pH 10 and a temperature of 298 K. In addition, the pseudo‐second‐order kinetic model was matched with the adsorption kinetic experimental data, and the adsorption isotherm data can be described by the Langmuir models. This study proposed that the CS/MCC/CA‐CDs sponge adsorbent creates tremendous potential application value in wastewater treatment due to its fast kinetics, high adsorption capacity, simple preparation, and eco‐friendly properties.

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Facile one-pot synthesis of long-term thermally stable CDs@AlOOH toward white-light illumination

Abstract: The CDs doped boehmite composite (CDs@AlOOH) is directly achieved through a facile, low-cost and green one-step decomposition route with tunable fluorescence emission and long-term thermal stability.

Cited by 10 publications

References 59 publications

Structure and Interface Modification of Carbon Dots for Electrochemical Energy Application

Structure and Interface Modification of Carbon Dots for Electrochemical Energy Application

Cyclodextrin Functionalized Carbon Dots Using IFE and FRET Dual Mechanism for Sequential Detection of Morin and Al³⁺

Carbon dots crosslinked chitosan/cellulose sponge capture of methyl blue by an adsorption process

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Facile one-pot synthesis of long-term thermally stable CDs@AlOOH toward white-light illumination

Abstract: The CDs doped boehmite composite (CDs@AlOOH) is directly achieved through a facile, low-cost and green one-step decomposition route with tunable fluorescence emission and long-term thermal stability.

Cited by 10 publications

References 59 publications

Structure and Interface Modification of Carbon Dots for Electrochemical Energy Application

Structure and Interface Modification of Carbon Dots for Electrochemical Energy Application

Cyclodextrin Functionalized Carbon Dots Using IFE and FRET Dual Mechanism for Sequential Detection of Morin and Al3+

Carbon dots crosslinked chitosan/cellulose sponge capture of methyl blue by an adsorption process

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Cyclodextrin Functionalized Carbon Dots Using IFE and FRET Dual Mechanism for Sequential Detection of Morin and Al³⁺