学术会议英文演讲模板doc.docx

1、学术会议英文演讲模板doc第一篇、国际会议口头报告ppt演讲内容准备模板学术会议英文演讲模板The Draft of Academic Presentation国际会议的口头报告模板，每页ppt你需要讲什么东西需要分页详细写，尽量口语化，如下是本人参加比利时会议的模板，供大家参考。 P1开场白I am so honored to be with you to communicate academic questions and ideas.The tile of my academic presentation is “The preparation and catalytic perform

2、ance of porous silica nanotube functioned with heteroatoms”I shall only take ten minutes of your time.I will talk about the topic on the preparation of porous materials.P2First of all, i wanna introduce myself. I come from nanjing university of technology, nanjing city, china.P3The content is listed

3、 as follows.P4All our researches are conducted by the academic thoughts. Generally speaking, we are committed to porous materials. In order to explore high-performance functionalized materials for Pilot experiments and scale-up production; we tune the structure, such as composition and morphology st

4、ep by step and optimize them further. Whats more, the possible synthesis mechanisms are also investigated. Today, the presentation is based on the right-hand branch.P5It is known that mesoporous silica have excellent characters as the catalyst carrier, such as.But due to lack of active sites, we hav

5、e to introduce organic or inorganic species as active sites. And the catalytic performance need to be further improved.P6As we know, the three factors including activity, scale and diffusion factor play decisive role in the catalysis, affecting the yield, selectivity, stability strongly. In our pres

6、entation, we mainly focus on the influence of scale factor on the catalysis.P7Due to lack of active sites for mesoporous silica, two main methods (surface loading, modified framework) are widely reported, by which various organic or inorganic active sites can be immobilized on the surface or incorpo

7、rated into the framework of mesopoous silica.P8Though various morphologies of mesoporos silica were widely synthesized, the synthesis of the mesoporos silica, with three simultaneous characteristics including doped metal, mesoporous structure and specific morphology, is always a challenge, which is

8、rarely reported.In other words, for our case exploring a proper condition, at which the silicon and metal sources can simultaneously hydrolyze, can ensure a desired material.P9Next, lets look at the synthetic steps. Firstly,. Then, . After that, . At last, we obtained theproducts.P10In this work, by

9、 changing the synthesis conditions, such as , and so on, the pure mesoporous silica with different morphologies were synthesized, including nanosphere, nanorod, helix, capsule and nanotube. We will focus on the preparation and catalytic application of mesoporous silica with nanotube morphology.学术会议英

10、文演讲模板P11the SEM images of samples: A1, A2, A3 are shown in the figure. It can be seen that sample a1 is nanowire-like with length of about 2m and diameter of about 100nm. When the amount of . is 0.04 g, the morphology of sample A2 became to be short and thick rods and the size is about 1m in length

11、and 400nm in diameter, respectively. With further increasing the amount of ., the sample A3 and A4 turned to be spherical morphology. It also can be seen that the diameters of samples A3 and A4 are substantially the same about 450nm. However, the spherical morphology of A4 is more regular than that

12、of AThe XRD patterns showed four reflection peaks attributed to (100), (110), (200) and (210), respectively, due to the hexagonal sructure.P12Then, we keep the same amount of ., increasing the amount of .We found that the length increased gradually. The XRD patterns also showed the hexagonal sructur

13、e of samples B1, B2, B3, BP13Moreover, an additional proof of the hexagonal symmetry structure is given by TEM and the FT pattern. The N2 adsorption-desorption isotherms of the samples B1, B2, B3, B4 exhibit a typical type-IV isotherm.According to the table of structural parameters, we can find that

14、 the specific surface area and total pore volume increase gradually, the thickness of wall decrease and there is no obvious change in diameter.P14Furthermore, the possible synthesis mechanism of the mesoporous silica nanotube in dual templates system was proposed. We suggest that due to electrostati

15、c repulsion between positively charged ammonium ions from hydrated ammonia molecules and hydrophilic groups of ., especially in ammonia (NH3, 25wt.%) solution, the high concentrated ammonium ions provide a crowded and repulsive space to prevent the conjunction of . molecules, leading to the formatio

16、n of the rod-like micelles as template to form pore structure instead of sphere-like ones.The role of co-template . is suggested to tune the length of rod-like micelles by arranging itself along the axis of channel with PEO and PPO part immersed in the hydrophilic and the hydrophobic group of CTA+ r

17、espectively. As a result, the mesoporous nanotube with different length will be synthesized. However, the non-polar . micelles are not affected by positively charged ammonium. When the amount of co-template increased further, the non-polar . micelles tend to control the morphology of micelles which

18、are sequentially from nanotube, short rod to sphere-like ones. It my be the reason that the non-polar . micelles would provide stronger attractive force than the electrostatic repulsion derived from the PEO block, ammonium ions and head group of ., respectively.P15In order to investigate the influen

19、ce of the morphology and structure of mesoporous silica on catalyticperformance, the samples with copper incorporated were synthesized.P16The figure shows the SEM and TEM images of samples a1, a2, a3, from which we can see they represent incremental length in the range of about 0.5, 0 and 5m, and in

20、significant change in diameter around 100nm. In XRD patterns, there are also four reflection peaks for the samples with copper incorprated, respectively, which indicates the incorporation of the inorganic copper salt has no obvious effect on the hexagonal sructure and the ordered degree of pore stru

21、cture. Moreover, the trends in length and the diameter of nanotube are illustrated.学术会议英文演讲模板P17The N2 adsorption-desorption isotherms of the samples a1, a2, a3 exhibit a typical type-IV isotherm according to the IUPAC classification and no hysteresis loop at the relative pressure range of 0.2p/p00.

22、4, implying the samples not only have ordered mesoporous structure but also the uniform pore size. Moreover, the pore diameters did not change significantly at different weight ratio of . The most probable pore sizes of samples a1, a2, a3 are determined to be 71, 50, 44 nm, respectively. The structu

23、ral parameters are listed in following table.P18This table summarized the catalytic activity of copper-modified porous silica nanotube in the direct hydroxylation of benzene with H2O2 as oxidant. The catalysts showed high catalytic activity, and direct proportional relationship between the benzene c

24、onversion and the length of the silica nanotube. Considering the similar copper content determined by ICP, the variations of catalytic activities were probably caused by different retention time of reagent in the nanotube with different lengths. P19It is Summary and Future ResearchThis part of resea

25、rch can be summed up from the following three aspects.Mophology control,Catalytic activity and Future research看this slide.P20thanks第二篇、英文国际学术会议开幕词演讲稿学术会议英文演讲模板International Conference on Space TechnologyDistinguished guests, distinguished delegates, ladies and gentlemen, and all the friends:At this

26、special time of wonderful September, in this grand hall of the beautiful city, our respectable guests are here getting together. Jointly sponsored by the International Astronautical Federation (IAF), International Academy of Astronautics (IAA) and the International Institute of Space Law (IISL), und

27、ertaken by China National Convention Center at Beijing, the sixty-fourth session of the International Astronautical Congress will be open. Now, first of all, please allow me to give our hearty welcome to all of you present, and thank you, for your friendly coming. We feel so proud, and appreciated a

28、s well to be the host of the event.For this conference, we are following the agenda here. The meeting is supposed to last for five days，it is the first congress which covers the true sense of space science and exploration, space applications and operations, space infrastructure, space and society mu

29、ltidimensional fields. And it to be separated into two parts, to begin with, well invite some representatives from our guests to give lectures about their latest researches and reports on the issue, and then we will have some symposiums. And finally I wish you an unforgettable and prefect experience

30、 here.Thank you!第三篇、学术英语 国际会议主持人,主席 chairman演讲稿模版学术会议英文演讲模板学术英语国际会议主持人/主席chairman演讲稿模版Distinguished Delegates and Guests, Ladies and Gentleman:Good morning! (Introduce myself) I am (Name) from (University). As chairperson of this session. I have the pleasure and honor of welcoming all of you. We hav

31、e an excellent session for you, in terms of both content and the distinction and the stature of our speakers.- increasingly important. The lifestyle of us have been changed by it, too. And the first investigator in this field. This morning she is going to talk about the secret of - From your presentation we know the reason why (AI developed by human being can beat the best chess master), and we believe that AI will make the most advantage in future. Thank you.- foremost r