In this work, a series of nanostructured molybdenum disulfide (MoS2) with various morphologies, such as spherical, flower-like, coil and hollow were synthesized via a one-step hydrothermal method. The photocatalytic properties of as obtained MoS2were evaluated by degrading methylene blue (MB) under visible light. Interestingly, the flower-like MoS2 exhibited the best photocatalytic activities. It is ascribed that the suitable porous structures of flower-like MoS2 can increase the number of exposed active sites, which facilitate the efficient adsorption and transfer of MB to the active sites. Meanwhile, the special structure of flower-like MoS2 can improve light absorption efficiency owing to the increasing of light paths. Furthermore, its 2D stacked petals possess abundant active sites, which will effectively affect the photocatalytic efficiency. This study indicates that the surface area of nanomaterials is not a dominated factor in photocatalytic performance. The surface morphology has a great influence on the photocatalytic performance, which provides a feasible guide for synthesizing efficient photocatalytic nanomaterials.
Ultra high voltage(UHV) power cable system is an economical, safe and reliable power transmission mode. In recent years, the concern about the traditional fossil energy pollution in the world and the determination to using clean energy have promote the medium distance UHV submarine power cable system. This paper designs and tests one kind of energy saving and loss reducing conductor applied to large cross-section submarine cable. Through reasonable process control, the paint film on the enamelled wire surface can be avoided being scraped during the process of twisting. According to the measured AC / DC resistance ratio, the optimized design for the subsequent conductor is put forward. Compared with the traditional conductor, the current carrying capacity of the conductor is improved, and it has a positive and practical significance for reducing the Joule loss of the cable system.
Abstract. Optical Fiber Composite Low-voltage Cable can used to transfer energy, television, telephone and data(for internet) information, by this means, the communication network infrastructure could be built once a time and be shared by different service providers, so State Grid Company has regulated a series of standards on how to construct communication network for smart electricity utilization Residence community. The paper introduced the theories and key technology firstly, and then it illustrated a kind of solution on network and analyzed network security issues. At last it discussed the necessary policy support to further application.
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