g-C3N4/TiO2 composite were prepared by hydrolysis of Ti(OC4Hn9) 4 and the precursors of g-C3N4 at room temperature and annealing in nitrogen atmosphere.X-ray diffraction results revealed that all the products were anatase structure.The chemical nature of O,N of the g-C 3N4/TiO2 were identified by X-ray photoelectron spectroscopy,presenting N-Ti-O and N-Ti-N doping status of the composite.The g-C3N4 /TiO2 composite showed better photocatalytic activity for the UV and visible-light degradation of Rhodamine B.
A multi-step reaction route was developed to synthesize boron nitride(BN) nanoparticles via the reaction between NaN3 and BCl3 in a benzene-thermal solution.By means of this route,the crystallinity of BN nanoparticles was improved via increasing the reaction steps.Meanwhile,a phase transformation from hexagonal BN(hBN) or turbostratic BN(tBN) to cubic BN(cBN) occurred,resulting in the increase of cBN content.Moreover,the content of cBN also slightly increased when the temperature was elevated from 265°Cto280 °C.
TAN MiaoLIAN GangZHANG XiaoZHANG Shun-jieCUI De-liangWANG Qi-long
In this study,an excellent polarization optical crystal LiNa_(5)Mo_(9)O_(30) with wide transmission range and high laser damage threshold was researched in detail.The laser damage threshold of the LiNa_(5)Mo_(9)O_(30) crystal was measured to be 2.64GW/cm^(2),which was the highest among polarized optical crystals.The birefringence in the range of 0.435-5μm was larger than 0.14,while the wedge angle between 31.94°and 32.12°would satisfy the application in this waveband.The extinction ratio of the fabricated prism with the wedge angel of 31.09°was larger than 15,000:1.The results show that the LiNa_(5)Mo_(9)O_(30) prism is an excellent polarization device,especially in the mid-infrared range and high-power applications.
Trger's base (TB) is a well-known chiral molecule with rigid concave shape that makes it applicable in different areas such as superamolecular chemistry,molecular recognition,biological labeling,and so on.In this article,we briefly summarize some recent research progress in the optoelectronic properties of novel TB analogues and their applications in optoelectronic field with emphasis on the developments achieved in our group.
YUAN ChunXue,XIN Qian,LIU HuiJun,WANG Lei,JIANG MinHua & TAO XuTang State Key Laboratory of Crystal Materials
