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Chinese scholars have developed bamboo-like nanomaterials

Edit: Ccdanni 2020-01-23 Mobile

  Recently, the University of Science and Technology of China and the University of Toronto team collaborated to design a "pulsed axial epitaxial growth" method to successfully prepare a one-dimensional colloidal quantum dot-nanowire segmented heterojunction with adjustable size and structure. This structure is a nano-bamboo composite heterojunction similar to the bamboo structure, which can make full use of solar energy and effectively convert it into hydrogen energy.

  With the tremendous pressure brought by global energy and environmental problems, people are seeking new clean energy to replace the traditional coal chemical industry. The use of sunlight to realize artificial photosynthesis and efficiently convert water in nature into clean hydrogen energy is an important direction of the scientific community's current efforts.

  In recent years, scientists have designed new semiconductor nanomaterials to capture solar energy and achieve efficient photochemical conversion, which has given us hope for the use of new clean energy. But how to reduce costs and further improve the 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, respectively. The two grow alternately, which is very similar to seeing bamboo standing in the ground Growth process. Interestingly, this unique growth method designed by researchers can precisely control the thickness, number of knots, and pitch of each artificial nano "bamboo". This rich regulation ability provides more space for further development and utilization of this type of material.

  In addition, researchers have found that there is a synergistic effect between the different components of this artificial nano "bamboo", and the combination of the two orientations greatly improves the performance of a single material. Compared with a single material, the solar hydrogen production efficiency of nano "bamboo" has improved by an order of magnitude, which provides a new way for the design and development of new and efficient solar hydrogen production materials in the future.

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