Synthesis of nanomaterials using bottom-up methods

Lin, Hengyu; Yan, Tian‐Hao; Bashir, Sajid; Liu, Jingbo Louise

doi:10.1016/b978-0-323-99877-2.00003-5

Cited by 6 publications

(4 citation statements)

References 149 publications

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“…The bottom-up and top-down approaches(seen in Figure 2), which have been schematically shown, represent two broad categories that encompass the many methods for the synthesis of CDs [37]. Although CD production offers convenience, it comes with various significant challenges.…”

Section: Synthesis Methods For Carbon Dotsmentioning

confidence: 99%

Carbon Dots for Future Prospects: Synthesis, Characterizations and Recent Applications: A Review (2019–2023)

Etefa,

Tessema,

Dejene

2024

Preprint

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Nanotechnology sparks discussions and concerns about the impacts of new nanomaterials on health and the environment. It holds importance in various domains due to its unique struc-tures. Carbon dots (C-dots) are versatile nanomaterials with applications in bioimaging, sensing, catalysis, polymers, solar cells, and more. They offer desirable characteristics such as stability, cost-effectiveness, biocompatibility, and high photoluminescent quantum yield. C-dots have the potential to replace expensive fluorophores in solar cells. They are catego-rized as carbon quantum dots, graphene quantum dots, and carbonized polymer dots. C-dots have outstanding optical and photoelectric properties with low toxicity. Bottom-up and top-down approaches are used for the synthesis of carbon dots (CDs), with each method im-pacting their physicochemical characteristics. The choice of synthesis method depends on de-sired properties and application requirements. Researchers combine these methods and ex-plore new approaches to enhance synthesis efficiency and tailor CD properties. CDs have di-verse chemical structures with modified oxygen, polymer-based, or amino groups on their surface. Various characterization methods such as HRTEM, XPS, and optical analysis (PL, UV) are used to determine CD structure. Carbon dots (CDs) are cutting-edge fluorescent nano-materials with remarkable qualities such as biocompatibility, low toxicity, environmental friendliness, high water solubility, and photo-stability. They are easily adjustable in terms of their optical properties, making them highly versatile in various fields. CDs find applications in bio-imaging, nanomedicine, drug delivery, solar cells, LEDs, photo-catalysis, elec-tro-catalysis, and other related areas.

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Section: Synthesis Methods For Carbon Dotsmentioning

confidence: 99%

Carbon Dots for Future Prospects: Synthesis, Characterizations and Recent Applications: A Review (2019–2023)

Etefa,

Tessema,

Dejene

2024

Preprint

View full text Add to dashboard Cite

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“…This method is a simple and convenient way of synthesizing nanoparticles from aqueous salts by the addition of a precipitant. 50 Commonly used precipitants are hydroxides, chlorides, carbonates, and oxalates. The resulting precipitates are then left to age and eventually collected through centrifugation.…”

Section: Precipitation Methodsmentioning

confidence: 99%

“…The mechanism behind self-assembly is based on variations in the orientation of particles due to Brownian motion compared to thermal energy. 50,57 Thermal energy affects the formation of soft materials at the nanoscale when the intermolecular forces are broken, thus enabling the system to reach thermodynamic equilibrium, and due to the weakness of the intermolecular interactions, it is possible to change variables such as pH or temperature, leading to phase transitions and orderliness. Some of the advantages include: low cost, simple deposition on a large-area substrate and easy modulation of energy and surface properties.…”

Section: Self-assembly Methodsmentioning

confidence: 99%

Evaluation of zinc sulfide heterostructures as catalysts for the transformation of CO₂ into valuable chemicals and clean energy generation

Ejeromedoghene,

Abdulwahab,

Udofia

et al. 2024

Energy Adv.

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“…3a, N 2 adsorption-desorption isotherms display significantly high surface areas for BiVO 4 /rGO compared to hierarchical BiVO 4 and bulk BiVO 4 attributed to the high specific surface area of quantum dots and rGO Table 1. List of advantages and disadvantages of various photocatalyst syntheses [19][20][21][22][23][24][25][26].…”

Section: Synthesis and Design Of Vanadate Compoundsmentioning

confidence: 99%

New updates on vanadate compounds synthesis and visible-light-driven photocatalytic applications

et al. 2023

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Photocatalysis is known as a new and cost-effective method to solve the problems of energy shortage and environmental pollution. Although the application of this method seems practical, finding an efficient and stable photocatalyst with a suitable bandgap and visible-light sensitivity remains challenging. In this context, vanadate compounds photocatalysts have been synthesized and used as emerging composites, and their efficiency has been improved through elemental doping and morphology modifications. In this review, the major synthesis methods, and the design of the latest photocatalytic compounds based on vanadate are presented. In addition, the effect of vanadate microstructures on various photocatalytic applications such as hydrogen production, CO2 reduction, and removal of organic pollutants and heavy metals are discussed. For instance, the application of a 2D-1D BiVO4/CdS heterostructure photocatalyst enhances 40 times the hydrogen production from benzyl alcohol than pure BiVO4. Similarly, the InVO4/Bi2WO6 composite has a superior photocatalytic capability for the reduction of CO2 into CO compared to pure InVO4. A CO production rate of 18 μmol.g−1.h−1 can be achieved by using this heterostructure. Regarding the organic pollutants’ removal, the use of Montmorillonite/BiVO4 structure allows a complete removal of Brilliant Red 80 dye after only 2 hours of irradiation. Finally, copper heavy metal is reduced to 90 % in water, by using BiVO4/rGO/g-C3N4 optimized photocatalyst structure. Other examples on decorated vanadate compounds for enhancing photocatalytic activities are also treated.

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Synthesis of nanomaterials using bottom-up methods

Cited by 6 publications

References 149 publications

Carbon Dots for Future Prospects: Synthesis, Characterizations and Recent Applications: A Review (2019–2023)

Carbon Dots for Future Prospects: Synthesis, Characterizations and Recent Applications: A Review (2019–2023)

Evaluation of zinc sulfide heterostructures as catalysts for the transformation of CO₂ into valuable chemicals and clean energy generation

New updates on vanadate compounds synthesis and visible-light-driven photocatalytic applications

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Synthesis of nanomaterials using bottom-up methods

Cited by 6 publications

References 149 publications

Carbon Dots for Future Prospects: Synthesis, Characterizations and Recent Applications: A Review (2019–2023)

Carbon Dots for Future Prospects: Synthesis, Characterizations and Recent Applications: A Review (2019–2023)

Evaluation of zinc sulfide heterostructures as catalysts for the transformation of CO2 into valuable chemicals and clean energy generation

New updates on vanadate compounds synthesis and visible-light-driven photocatalytic applications

Contact Info

Product

Resources

About

Evaluation of zinc sulfide heterostructures as catalysts for the transformation of CO₂ into valuable chemicals and clean energy generation