Synthesis And Properties Study Of InP Nanomaterials

As one of important III-V compound semiconductor nanomaterials, InPnanomaterials have become one of a hot topic in the field of nanoscience andnanotechnology because of its application in electronic and optoelectronic nanodevicesetc.. In this paper, InP nanomaterials with different crystal structure, such as nanowires,nanoneedles, nanotubes and nanocombs and so on, have been synthesized by chemicalvapor deposition method and solvothermal method respectively, while the influence ofsynthetic conditions on the crystal structure, morphology and optical properties ofnanomaterials were studied.InP nanowires with polycrystalline structure have been synthesized by single heatingzone chemical vapor deposition method, in the conditions of1.0mmol In powder and Inpowder, red phosphorus molar ratio of1:1.3, the synthesis temperature of650℃. InPnanowires with single crystal structure have been prepared by double heating zoneschemical vapor deposition method, in the conditions of1.0mmol In powder and Inpowder, red phosphorus molar ratio of1:1.3:2.6, the synthesis temperature of650℃atheating area1and700℃at heating area2. InP nanowires with twin structures stackingfaults phase have been prepared by double heating zones chemical vapor depositionmethod and the In powder preheated to200℃and maintained for30minutes, which isabove the melting point temperature of In, in the conditions of1.0mmol In powder and Inpowder, red phosphorus molar ratio of1:1.3:2.6, the synthesis temperature of650℃atheating area1and700℃at heating area2. Experiments results show that, InP nanowireswith different diameter, length and crystal structures can be synthesized using a chemicalvapor deposition method by changing the synthesis conditions.InP nanowires with single crystalline structure have been prepared by solvothermalsynthesis method, in the conditions of2.0mmol In powder and0.75mmol whitephosphorus as raw materials, benzene as solvent,2.0mmol KBH4as reducing agent,2.0mmol CTAB as surfactant, at180℃for12h, then at380℃for6h.Experiments resultsshow that, CTAB is beneficial to the formation of InP nanomaterial linear morphology; InP nanowires with different diameter and length can be synthesized by a solvothermalmethod by changing the synthesis conditions.InP nanoneedles with single crystal structure have been prepared by solvothermalsynthesis method, in the conditions of2.0mmol In powder and0.75mmol whitephosphorus as raw materials, benzene as solvent,2.0mmol KBH4as reducing agent with,2.0mmol CTAB as surfactant, at200℃for12h, then at350℃for12h;InP nanotubeswith single crystal structure have been prepared by solvothermal synthesis method, in theconditions of2.0mmol In powder and3.0mmol red phosphorus as raw material, benzeneas solvent,4.0mmol CTAB as surfactant, at200℃for12h, then at280℃for12h;InPnanocombs with twin structure containing stacking faults have been prepared by doubleheating zones chemical vapor deposition method and the In powder preheated to160℃and maintained for30minutes, which is about equal to the melting point temperature of In,in the conditions of In powder and red phosphorus molar ratio of1:1.3:2.6, the synthesistemperature of650℃at heating area1and700℃at heating area2for12h. Experimentsresults show that, the morphology and crystal structure of InP one-dimensionalnanomaterials can be controlled by selecting different synthesis methods and conditions.Raman spectra of InP nanowires, nanoneedles, nanotubes and nanocombs werestudied using Raman spectroscopy analysis method. The results show that, compared withthe bulk materials, red shift phenomenon of Raman spectrum characteristic peak positionof InP one-dimensional nanomaterials occurred in different degrees. PL spectra of InPone-dimensional nanomaterials are studied using photoluminescence spectroscopy. Theresults show that, compared with bulk materials, blue shift phenomenon of PL emissionpeak position were observed in different degrees. Photocatalytic performance of InPnanowires were studied by ultraviolet-visible pectrophotometer. The results show that,under ultraviolet light irradiation, InP nanowires have photocatalysis to degradation ofRhB dye.