What are the chemicals that are expensive, tedious or toxic for synthesis of carbon dots?
Best insight from top research papers
The synthesis of carbon dots (CDs) can be expensive, tedious, or involve toxic chemicals. The traditional method of synthesizing CDs using a top-down approach requires special experimental setups and is not suitable for large-scale production . Additionally, the current synthesis process for carbon quantum dots (CQDs) involves complicated raw materials, high cost, and difficult product purification . However, there are alternative methods that aim to address these issues. For example, CDs can be synthesized from tea waste, which is an inexpensive and sustainable carbonaceous source . Green synthesis methods using eco-friendly sources like waste biomass have also been explored to mitigate waste management problems . These methods offer simple, low-cost synthesis routes for CDs with excellent optical properties, low toxicity, and high biocompatibility .
Answers from top 5 papers
More filters
| Papers (5) | Insight |
|---|---|
01 Apr 2021 90 Citations | The paper does not mention any specific chemicals that are expensive, tedious, or toxic for the synthesis of carbon dots. |
| The paper does not mention any chemicals that are expensive, tedious, or toxic for the synthesis of carbon dots. | |
| The provided paper does not mention any chemicals that are expensive, tedious, or toxic for the synthesis of carbon dots. | |
| The paper does not provide information about the chemicals that are expensive, tedious, or toxic for the synthesis of carbon dots. | |
| The paper does not provide specific information about chemicals that are expensive, tedious, or toxic for the synthesis of carbon dots. |
Related Questions
What are the different types of precursors used to synthesize carbon dots?4 answersCarbon dots (CDs) can be synthesized using different types of precursors. Green precursors include fruits, vegetables, flowers, leaves, seeds, stem, crop residues, fungi/bacteria species, and waste products. Chemical precursors can be classified into acid reagents and non-acid reagents. Aromatic compounds, such as amines, phenols, and polycyclics, are commonly used as precursors for the synthesis of CDs. Other precursors used include citric acid, glucose, and birch bark soot. CDs synthesized from different precursors exhibit different optical and structural properties. CDs obtained from distinct bottom-up methods and low molar mass precursors have been studied for their advantages and disadvantages. Bioprecursors, such as plant biomass, animal products, food items, and waste materials, are also used to synthesize CDs in an environmentally friendly manner.
Hydrothermal synthesis method of carbon dots?5 answersHydrothermal synthesis is a method used for the preparation of carbon dots (CDs). This method involves the use of a hydrothermal reactor and specific experimental parameters to control the size and properties of the CDs. Different precursor concentrations, processing temperatures, and reaction times can be used to control the average size of the CDs. The hydrothermal synthesis of CDs can also be achieved by using different filling volumes of the precursor solution in the reactor, which results in CDs with different average sizes. The hydrothermal method has been used to synthesize various types of carbon dots, including red fluorescent carbon dots (r-CDs), graphene quantum dots (GQDs), and nitrogen-doped carbon dots (NCDs). These CDs exhibit different photoluminescent properties and have potential applications in optoelectronics, bioimaging, sensing, and catalysis. The hydrothermal synthesis of CDs offers a simple, low-cost, and scalable method for their preparation.
How to synthesis carbon quantum dot?3 answersCarbon quantum dots (CQDs) can be synthesized using various methods. One approach is to use low-cost precursors such as residual organics like coffee powder. Another method involves synthesizing CQDs through a variety of synthetic protocols, typically understood from considerations of reaction models and photoluminescence mechanisms. Additionally, CQDs can be produced from water hyacinth stalks using a one-pot gamma irradiation method, which has been compared to the conventional hydrothermal method. Another method involves hydrothermally synthesizing a liquid hydrocarbon aqueous solution and dispersing the synthesized product in a polymer aqueous solution. Furthermore, CQDs can be prepared by sealing a carbon quantum dot precursor aqueous solution in nanometer pores of precursor-silica gel and carrying out a hydrothermal carbonization reaction. These methods offer different approaches to synthesizing carbon quantum dots, providing options for researchers and manufacturers.
What are the most expensive chemicals used in the synthesis of carbon dots?5 answersThe abstracts provided do not mention the cost or expense of the chemicals used in the synthesis of carbon dots.
Why is it hard to make crystaliine COF?5 answersMaking crystalline covalent organic frameworks (COFs) is challenging due to several factors. Firstly, COFs are formed by linking organic molecules through covalent bonds to create a porous and crystalline structure. This requires precise control over the synthesis conditions to ensure the formation of the desired crystalline structure. Secondly, COFs are composed of light elements such as boron, carbon, nitrogen, oxygen, and silicon, which can make it difficult to achieve the necessary stability and robustness for crystallization. Additionally, the incorporation of flexibility and dynamics into COFs, such as creating woven structures, adds another level of complexity to the synthesis process. Overall, the challenge lies in balancing the need for porosity, crystallinity, and mechanical properties in COFs, which requires a deep understanding of the chemistry and structure-property relationships involved.
How to synthesize carbon dots from leaves?5 answersCarbon dots can be synthesized from leaves using a hydrothermal method. The leaves are carbonized and then subjected to a hydrothermal reaction at a certain temperature. The resulting product is then cooled, separated, and filtered. The filtrate is then freeze-dried to obtain the carbon dots in powder form. This method is simple, requires few raw materials, and does not require additional surface passivators. The carbon dots synthesized from leaves have strong fluorescence and high biocompatibility. They can be used in various applications such as sensing, bioimaging, drug delivery, and catalysis. The carbon dots can also enter cells and emit stable fluorescence within a wide wavelength range, making them useful for bio-imaging and agriculture.