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Chinese scholars have developed bamboo-like structural nano-materials

Release time：

2019-10-18 09:40

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Chinese scholars have developed bamboo-like structural nano-materials

Recently, the University of Science and Technology of China and the University of Toronto research team designed a "pulsed axial epitaxial growth" method, successfully prepared a one-dimensional colloidal quantum dot-nanowire segmented heterojunction with adjustable size and structure. The structure is a nano-bamboo composite heterojunction similar to the bamboo structure, which can fully utilize solar energy and effectively convert it into hydrogen energy.

With the enormous pressure from global energy and environmental issues, people are looking for new clean energy to replace the traditional coal chemical industry. The use of sunlight to achieve artificial photosynthesis and the efficient conversion of water in nature into clean hydrogen energy is an important direction of the scientific community.

In recent years, scientists have seen the hope of using new clean energy sources by designing new semiconductor nanomaterials to capture solar energy and achieve efficient photochemical conversion. However, how to reduce costs and further improve conversion efficiency to achieve industrialization is still a huge challenge.

The bamboo and bamboo stems of the artificial nano-bamboo mentioned in the above study are composed of two different semiconductor materials, cadmium sulfide and zinc sulfide, which grow alternately, which is very similar to the bamboo that we see in our lives. The growth process. Interestingly, the unique growth method designed by the researchers allows you to precisely control the thickness, number of nodes, and spacing of each bamboo in each artificial nano-bamboo. This rich regulatory capacity provides more room for further development and utilization of this type of material.

In addition, the researchers found that there is a synergistic effect between the different components of such artificial nano-bamboo, and the combination of orientations of the two greatly enhances the performance of a single material. Compared with a single material, the nano-"bamboo" solar hydrogen production efficiency has increased by an order of magnitude, which provides a new way to design and develop new high-efficiency solar hydrogen production materials in the future.

2019 annual nanotechnology priority project special estimate of 100 million yuan

Nanomaterial market segment, industry competition

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