Question

Compare sustainable development and unsustainable development increased energy efficiency

Answer 1

The Big Difference BetweenEnergy Efficiency and Sustainability. A misunderstanding of thedifference between sustainability versus energyefficiency is preventing practitioners from reaching their goals of helping the environment. ... It's the incentive that keepssustainability practitioners working hard.

Answer 2

Answer:

The coupling of carbon nanodots (C-Dots) with graphitic carbon nitride (g-C3N4) has been demonstrated to boost the overall photocatalytic solar water splitting efficiency. However, the understanding on the role of the C-Dots and how the structure of C-Dots influences the photocatalytic reaction is still limited. In this work, we investigate the excited states of some C-Dot/g-C3N4 composites with the C-Dots containing different functional groups including –OH, –CHO and –COOH by first-principles many-body Green's function theory. It is found that the increase of efficiency can be ascribed to the high separation rate and the low recombination rate of the electron–hole pair benefiting from the emergence of the charge-transfer excited state between the C-Dots and g-C3N4. Functional groups on the C-Dots play a crucial role in determining the charge transfer direction, active sites for reduction reaction and oxidation reaction of water, and whether the reaction is a four-electron process or a two-electron/two-electron process. These results can provide guidance for the design and optimization of the C-Dots for heterojunction photocatalysts.

There is no waste in the forest because decomposers convert all the dead bodies of the plants and animals into the humus which gets added to the soil. Thus, no waste remains.

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