1、中文 2890 字 Preparation of Nanostructures and Photoluminescence Bi2S3 ZHANG Weixin， QIU Mo， ZHANG Junjun， YANG Zeheng， CHEN Min (School of Chemical Engineering, Hefei University of Technology, Anhui Key Laboratory of Controllable Chemical Reaction & Material Chemical Engineering, Hefei 230009, China )
2、 Abstract: Bismuth nitrate and sodium sulfide as raw material, two-step hydrothermal method was successfully prepared at 100 Bi2S3 orthorhombic micro ring； Youyi bismuth nitrate and thiourea as the raw material, the use of step hydrothermal synthesized at 150 with Orthorhombics Bi2S3 nanorods. Respe
3、ctively, X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy and fluorescence spectrometry and other means of final product testing phase, morphology and properties were characterized to explore the mechanism of ring formation Bi2S3 microns. The results s
4、howed that: Bi2S3 micron diameter ring 1 1.5m, external diameter of 1.5 2m, the average size of about 100nm in the nano-grains assembled. Bi2S3 nanorods diameter of about 125nm, a length of 1 2m. Bi2S3 micron and nano-rod Bi2S3 ring emission peak at 447nm and 470nm are located at, Bi2S3 micron emiss
5、ion peak position of ring Bi2S3 nanorods compared to the emission peak position was a blue shift. Key words: bismuth sulfide； hydrothermal method； nanostructure； photoluminescence The performance of nano-materials depends not only on its own structure and composition, but also the size and shape and
6、 materials are closely related, and thus the size of nano-materials, structure and morphology of control synthesis to optimize material properties, not only has important Theoretical significance but also broaden the application areas of nano-materials, which has become the field of synthetic chemis
7、try and materials research focus of a front, causing researchers 1 wide interest. Because of its central ring has a very special hole and has many special properties. For example: Aizpurua other study found that the hole in the center gold ring has a strong effect of uniform magnetic field, which ma
8、kes research in sensing and spectroscopy can be used as nano-hole resonance to support or test other smaller nano-structured materials . 2 In addition, Rothman magnetic ring and other materials found in high density magnetic storage and magnetic random access memory also has potential practical appl
9、ications. 2 The vulcanized bismuth(Bi2S3) is a kind of important semiconductor material, its band gap is a 1.21.7 evs, give or get an electric shock in the thermal, optoelectronics and electrochemistry3 5 keep aspects like hydrogen,etc to have potential application worth.In recent years, Na rice the
10、 composition of the structure vulcanized bismuth caused the extensive concern of the researcher. Currently, at Na rice structure the vulcanized bismuth contain a lot of wires that report, mainly have a Na ricethe 6, Na rice is good7, Na rice necklace8 and pan-like in shape5 and rose-like in shape9 e
11、tc. construction structure.The Li waits5 with the chlorination bismuth is in the hydrochloric acid aqueous solution water solution income chlorination oxidizing bismuth for forerunner body, with sulfur generation An for sulfur source, in 60 often press down to make from the diameter about the 30 nms
12、, length for the Na rice of the 150200 nms rod weave of average diameter for the thin pan-like in shape vulcanized bismuth of 2 m. The thou national prosperity waits9 with just the right amount of laurel acis the sulfur An salt(salt of 2-undecy 1-1-dithioureido-ethyl- imidazoline, SUDEI) for surface
13、 live agent, take chlorination bismuth and sulfur generation Mao An as raw material, adopt melting agent thermal legal system have the rose-like in shape spheroid(diameter about one m) structure that is applied by the slab-like in shape vulcanized bismuth curl overlay.Also have the jot the search co
14、ncerning vulcanized bismuth nanotube to report moreover.For example, is firm and uncompromising to wait10 take the nitric acid bismuth and the vulcanized sodium as to respond raw material, adopt water thermal law to respond a 12h under 120 and made a vulcanized bismuth nanotube. The experiment takes the nitric acid bismuth and the vulcanized
