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Related Concept Videos

Solution Composition During Acid/Base Titrations01:17

Solution Composition During Acid/Base Titrations

1.6K
The titration of a weak acid with a strong base results in the formation of water and the conjugate base of the acid. For instance, titrating acetic acid with sodium hydroxide leads to the formation of water and sodium acetate. A solution of acetic acid and sodium acetate constitutes a buffer whose relative concentration at different stages of the titration is indicated by the α values, which represent percentages of the weak acid and its conjugate base.
The α0 and α1 values...
1.6K
Composition of Polyprotic Acid Solutions as a Function of pH01:19

Composition of Polyprotic Acid Solutions as a Function of pH

867
Polyprotic acids of the type H2M constitute two ionizable protons. As a result, on titration with a base, they exhibit two equivalence points in the titration curve. During titration, the species H2M, HM−, and M2− will be present in the solution at different points. The fractions of H2M, HM−, and M2− present at the various instances of the titration are denoted by α0, α1, and α2, respectively.
A graph with the alpha values is plotted against the volume of...
867
General Properties of Solutions02:12

General Properties of Solutions

35.9K
Many common substances around us exist as a solution, such as ocean water, air, and gasoline. All solutions are mixtures of substances that are composed of varying amounts of two or more types of atoms or molecules. A mixture with a non-uniform composition is a heterogeneous mixture, whereas a mixture with a uniform composition is a homogeneous mixture. The components that make the homogeneous mixture are evenly spread out and thoroughly mixed. 
35.9K
pH Scale02:41

pH Scale

80.0K
Hydronium and hydroxide ions are present both in pure water and in all aqueous solutions, and their concentrations are inversely proportional as determined by the ion product of water (Kw). The concentrations of these ions in a solution are often critical determinants of the solution’s properties and the chemical behaviors of its other solutes. Two different solutions can differ in their hydronium or hydroxide ion concentrations by a million, billion, or even trillion times. A common means of...
80.0K
Classifying Matter by Composition03:35

Classifying Matter by Composition

90.6K
Matter: Pure Substances and Mixtures
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures. 
A pure substance is a form of matter that has a constant composition throughout with uniform properties. For example, any sample of sucrose has the same composition and same physical properties, such as melting point, color, and sweetness, regardless of the source from which it is isolated. 
A mixture is composed of two or...
90.6K
Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

72.0K
Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
72.0K

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Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry
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Large-Scale, Solution-Synthesized Nanostructured Composites for Thermoelectric Applications.

Biao Xu1,2, Tianli Feng3,4, Zhe Li2

  • 1School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu, 210094, China.

Advanced Materials (Deerfield Beach, Fla.)
|August 23, 2018
PubMed
Summary

High-efficiency thermoelectric materials convert waste heat into electricity. Solution synthesis of nanomaterials offers scalable, controllable, and cost-effective thermoelectric device fabrication.

Keywords:
nanostructuressolutionsynthesisthermoelectrics

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Energy Conversion

Background:

  • Over 50% of global energy is lost as waste heat annually.
  • Thermoelectric materials offer a sustainable solution for waste heat recovery.
  • Nanoscience advancements have significantly improved thermoelectric performance.

Purpose of the Study:

  • To review progress in solution-synthesized nanomaterials for thermoelectrics.
  • To highlight the advantages of solution synthesis over other methods.
  • To propose future research directions in the field.

Main Methods:

  • Review of existing literature on thermoelectric nanomaterials.
  • Focus on solution-based synthesis techniques.
  • Analysis of structure-property relationships in nanomaterials.

Main Results:

  • Solution synthesis enables precise control over nanostructure size, composition, and morphology.
  • Nanoscience effects like quantum confinement and grain boundary scattering enhance thermoelectric efficiency.
  • Solution-synthesized nanomaterials exhibit novel effects beneficial for portability and cost-efficiency.

Conclusions:

  • Solution synthesis is a promising scalable approach for high-performance thermoelectric nanomaterials.
  • Further research can unlock new thermoelectric applications leveraging solution-processed nanostructures.
  • Thermoelectric generators based on these materials can contribute to energy sustainability.