1. Introduction Catechol (CC) is recognized as a carcinogen by the international agency for research on cancer of the World Health Organization. 13 As an important industrial raw material and chemical synthesis intermediate, CC is widely used in coatings, fragrance, resins and other industries. 46 However, conventional water treatment processes cannot effectively remove this substance.
Nanosized metal nitrides, due to their chemical characteristics which make them sustainable alternatives to noble metals in catalysis, have drawn the attention of researchers worldwide. Transition metal nitrides are very similar in their method of synthesis, properties, and applications. Their synthetic parameters are considered to be the main factor for determining the effectiveness of metal ...
Graphiticcarbon nitride quantum dots (gC 3 N 4 QDs), as a rising star in the carbon nitride family, show great potential in many fields involving bioimaging, fuel cells, and photo ... Recent progress in gC 3 N 4 quantum dots: synthesis, properties and applications in photocatalytic degradation of organic pollutants T. Wang, C. Nie, Z. Ao, S ...
Duan et al. stated that synthesis of the water soluble carbon dots with high number of the carboxyl groups has been performed through citric acid and urea via an easy microwave irradiation, and the asprocured CDs exhibited the average dimension equal to nm with the green fluorescence emission and the fluorescence QY as %. 104 Obtained ...
Quantum dots (QDs) have sparked great interest due to their unique electronic, optical, and structural properties. In this review, we provide a critical analysis of the latest advances in the synthesis, properties, and applications of QDs. We discuss synthesis techniques, including colloidal and hydrothermal synthesis, and highlight how the ...
Epitaxially grown gallium nitride quantum dots embedded in aluminium nitride have the potential for operation at much higher temperatures. ... 1501 Page Mill Rd. MS 1123, Palo Alto, California ...
Herein, a conceptually new and straightforward aqueous route is described for the synthesis of hydroxyl and aminofunctionalized boron nitride quantum dots (BNQDs) with quantum yields (QY) as high as % by using a facile bottomup approach, in which a mixture of boric acid and ammonia solution was hydrothermally treated in one pot at 200 °C for 12 h.
For the development of functional materials with mechanochemical synthesis, a new approaches have been tried. One of them is liquidassisted grinding (LAG) (kneading) which is an effective method for polymorph control (Trask et al. 2005) and increases cocrystallization rate (Nguyen et al. 2007).A small amount of liquid is used and the ratio of liquid volume to reactant weight (ƞ) is 02 ...
For the synthesis of Ga 1−x Tb x N (0 ≤ x ≤ ) nanostructures, analytical grade chemicals: Gallium (ll) chloride (Ga 2 Cl 4 ), Terbium (lll) nitride pentahydrate [Tb (NO 3) 3 ]·5H 2 O, Hexamethyldisilazane (C 6 H 19 NSi 2 ), and toluene were procured from Sigma Aldrich.
Carbon nitride materials have become highly explored carbon based nanomaterials since their rediscovery in the 1990s due to their semiconductor like behavior. Here, we report a facile one pot synthesis of sulfur and oxygen doped carbon nitride quantum dots (SCNQDs) from thiourea and ethylenediaminetetraacetic acid disodium salt by a thermal method. The SCNQDs prepared are characterized by UV ...
Nanocrystalline GaN was synthesized through reactive laser ablation of gallium metal in a N2 atmosphere. Xray diffraction, selectedarea electron diffraction, and transmission electron microscopy measurements show that the GaN crystallites are as small as 2 nm in diameter, and follow a lognormal size distribution with a mean particle diameter of 12 nm. Sizeselective photoluminescence and ...
In this study, boron nitride nanosheets (BNNS) were prepared through exfoliation of bulk BN powder and efficacious incorporation of Ni (dopant material) was achieved using hydrothermal methodology. Hexagonal phase of BN (hBN) was detected using xray difractometer (XRD). The presence of used chemicals was identified by functional group analysis through fourier transform infrared ...
In this review, the current progress in the development of quantum dots, focusing on carbon quantum dots for use in nanotheranostics for different tumours, will be critically analysed. The advantages of applying carbon quantum dots by green bottomup approaches into nanotherapy systems will be highlighted.
Silver indium sulfide (AgInS2) semiconductor nanoparticles are cadmiumfree quantum dots emitting in visible to near infrared regions. The present study demonstrates the narrowing of their broad ...
Synthesis of gallium nitride quantum dots through reactive laser ablation Full Record Related Research Abstract Nanocrystalline GaN was synthesized through reactive laser ablation of gallium metal in a N {sub 2} atmosphere.
Graphitic carbon nitride quantum dots (CNQDs) are a new class of nanomaterial with an extraordinary photoluminescent property. Here, three highly watersoluble and photoluminescent CNQDs are synthesized through a green and facile onestep hydrothermal approach, with urea as the nitrogen source and citric acid and its salts as carbon sources. The photoluminescence (PL) performance demonstrated ...
Gallium nitride (GaN) was epitaxially grown on nitrogen doped single layer graphene (NSLG) substrates using chemical vapour deposition (CVD) technique. The results obtained using xray ...
Highquality InPbased quantum dots (QDs) have become very promising, environmentally benign light emitters for display applications, but their synthesis generally entails hazardous hydrofluoric acid. Here, we present a highly facile route to InP/ZnSe/ZnS core/shell/shell QDs with a nearunity photoluminescence quantum yield. As the key additive, the inorganic salt ZnF2 mildly reacts with ...
Titanium carbide is the binary compound and is an extremely hard refractory ceramic material, like Tungsten Carbide. Here, we will discuss the history and discovery of Titanium Carbide, Properties of TiC Nanoparticles, including Hardness, Lubricating Properties, Chemical Properties, Storage Conditions, and Structure of Titanium Carbide Nano Powder. Moreover, we will cover various applications ...
Quantum dots (QDs) are nanocrystals of a semiconductor material that exist in a size regime less than 10 nm. QDs have become promising nanoparticles for a wide variety of different applications. However, the major drawback of QDs is their potential toxicity. This review reports on some recent methods for the synthesis of QDs and explores their properties, structures, applications, and toxicity ...
Therefore, the impurity O was sometimes detected by EDX measurement. If gallium oxide (Ga 2 O 3) is formed, it can be observed by SEM as tiny dots of ∼1 μm on the surface of GaN fine particles as shown in Fig. 5. Ga 2 O 3 can be easily removed by HCl treatment of the powder or by ammonolysis at 930°C. Download : Download fullsize image ...
Fluorescent Quantum Dots OneStep Synthesis of Boron Nitride Quantum Dots: Simple Chemistry Meets Delicate Nanotechnology Bingping Liu, [a]Shihai Yan,[b] Zhongqian Song, [a]Mengli Liu, Xuqiang Ji ...
Highly luminescent carbon quantum dots (CQDs) are developed as fluorescent probes for selective detection of the heavyion Fe3+, where the CQDs exhibit excellent nontoxicity, functionalizability, sensitivity, and selectivity. Biomassbased CQDs and nitrogendoped CQDs (NCQDs) are synthesized for the selective detection of Fe3+ by using H2O2 as an oxidant and polyetherimide (PEI) as a nitrogen ...
Graphene quantum dots (GQDs) have a wide range of potential applications, yet current cutting methods produce GQDs in low amounts and with poor optical properties. Here, the authors demonstrate ...
Precursors and synthesis procedures must be chosen carefully to avoid this, as they contribute significantly to determining the shape and size of the quantum dots and hence their optoelectronic capabilities. ... This chapter will focus on the production of carbon nitride quantum dots from bulk gC 3 N 4 and their applications. References,, ...
This chapter discusses graphitic carbon nitride (gC 3 N 4) quantum dot (CNQD), which is a novel carboncontaining synthetic resource of gC 3 N 4 comes from bulk carbon material, such as melamine or urea powder. Further quantized synthesis of gC 3 N 4 is often performed by thermal etching and hydrothermal method. After the preliminary steps during synthesis, bulk gC 3 N 4 lumps ...
The preparation of boron nitride quantum dots. Generally, there are two strategies to fabricate BNQDs: 'topdown' and 'bottomup' processes as summarized in Fig. 4. The 'topdown' process is related to cut the largesize bulk h BN into smallsize BNQDs by physical exfoliation or chemical tailoring approaches.
Graphene Quantum Dots (GQDs), zerodimensional nanoparticles which are derived from carbonbased sources owned the new pavement for the energy storage applications. With the varying synthesis routes, the inbuilt properties of GQDs are enhanced in different categories like quantum efficiency, nominal size range, and irradiation wavelength which could be applied for the several of energy and ...
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