CN112111049B - 一种含氮二维聚合物薄膜及其制备方法和应用 - Google Patents
一种含氮二维聚合物薄膜及其制备方法和应用 Download PDFInfo
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- 229920006254 polymer film Polymers 0.000 title claims abstract description 91
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000012670 alkaline solution Substances 0.000 claims abstract description 19
- 239000000243 solution Substances 0.000 claims abstract description 14
- 239000000178 monomer Substances 0.000 claims abstract description 11
- 230000008014 freezing Effects 0.000 claims abstract description 9
- 238000007710 freezing Methods 0.000 claims abstract description 9
- 150000001412 amines Chemical class 0.000 claims abstract description 7
- MGNCLNQXLYJVJD-UHFFFAOYSA-N cyanuric chloride Chemical compound ClC1=NC(Cl)=NC(Cl)=N1 MGNCLNQXLYJVJD-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000003513 alkali Substances 0.000 claims abstract description 5
- 230000008018 melting Effects 0.000 claims abstract description 5
- 238000002844 melting Methods 0.000 claims abstract description 5
- 239000003960 organic solvent Substances 0.000 claims abstract description 5
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 21
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 13
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- QPFMBZIOSGYJDE-UHFFFAOYSA-N 1,1,2,2-tetrachloroethane Chemical compound ClC(Cl)C(Cl)Cl QPFMBZIOSGYJDE-UHFFFAOYSA-N 0.000 claims description 4
- FYGHSUNMUKGBRK-UHFFFAOYSA-N 1,2,3-trimethylbenzene Chemical compound CC1=CC=CC(C)=C1C FYGHSUNMUKGBRK-UHFFFAOYSA-N 0.000 claims description 4
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 claims description 4
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 4
- NQRYJNQNLNOLGT-UHFFFAOYSA-N Piperidine Chemical compound C1CCNCC1 NQRYJNQNLNOLGT-UHFFFAOYSA-N 0.000 claims description 4
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 4
- HUCVOHYBFXVBRW-UHFFFAOYSA-M caesium hydroxide Chemical compound [OH-].[Cs+] HUCVOHYBFXVBRW-UHFFFAOYSA-M 0.000 claims description 4
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 claims description 4
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 claims description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 3
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 claims description 2
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 claims description 2
- RELMFMZEBKVZJC-UHFFFAOYSA-N 1,2,3-trichlorobenzene Chemical compound ClC1=CC=CC(Cl)=C1Cl RELMFMZEBKVZJC-UHFFFAOYSA-N 0.000 claims description 2
- OCJBOOLMMGQPQU-UHFFFAOYSA-N 1,4-dichlorobenzene Chemical compound ClC1=CC=C(Cl)C=C1 OCJBOOLMMGQPQU-UHFFFAOYSA-N 0.000 claims description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 2
- 229910019440 Mg(OH) Inorganic materials 0.000 claims description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 2
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 claims description 2
- 150000001335 aliphatic alkanes Chemical group 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 229960001701 chloroform Drugs 0.000 claims description 2
- 229940117389 dichlorobenzene Drugs 0.000 claims description 2
- 239000003208 petroleum Substances 0.000 claims description 2
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 2
- 239000008096 xylene Substances 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 10
- 239000001257 hydrogen Substances 0.000 abstract description 10
- 239000003054 catalyst Substances 0.000 abstract description 8
- 230000005669 field effect Effects 0.000 abstract description 8
- 238000005336 cracking Methods 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 14
- 229920000642 polymer Polymers 0.000 description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 12
- 239000000463 material Substances 0.000 description 12
- 239000010409 thin film Substances 0.000 description 12
- 229910052757 nitrogen Inorganic materials 0.000 description 10
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- 230000005540 biological transmission Effects 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 238000001237 Raman spectrum Methods 0.000 description 6
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical group C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000001000 micrograph Methods 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000000026 X-ray photoelectron spectrum Methods 0.000 description 4
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- 238000001035 drying Methods 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 238000002329 infrared spectrum Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 238000002371 ultraviolet--visible spectrum Methods 0.000 description 4
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 description 2
- 238000001069 Raman spectroscopy Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910021607 Silver chloride Inorganic materials 0.000 description 2
- 238000000862 absorption spectrum Methods 0.000 description 2
- GSPBVFMIOSWQJB-UHFFFAOYSA-N benzene-1,3,5-triamine;trihydrochloride Chemical compound Cl.Cl.Cl.NC1=CC(N)=CC(N)=C1 GSPBVFMIOSWQJB-UHFFFAOYSA-N 0.000 description 2
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical group Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 2
- 238000012844 infrared spectroscopy analysis Methods 0.000 description 2
- 238000004502 linear sweep voltammetry Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- AHADSRNLHOHMQK-UHFFFAOYSA-N methylidenecopper Chemical compound [Cu].[C] AHADSRNLHOHMQK-UHFFFAOYSA-N 0.000 description 2
- 239000002048 multi walled nanotube Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000004611 spectroscopical analysis Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- -1 1,3, 5-trisubstituted benzene ring Chemical group 0.000 description 1
- HIXDQWDOVZUNNA-UHFFFAOYSA-N 2-(3,4-dimethoxyphenyl)-5-hydroxy-7-methoxychromen-4-one Chemical compound C=1C(OC)=CC(O)=C(C(C=2)=O)C=1OC=2C1=CC=C(OC)C(OC)=C1 HIXDQWDOVZUNNA-UHFFFAOYSA-N 0.000 description 1
- NVJHHSJKESILSZ-UHFFFAOYSA-N [Co].N1C(C=C2N=C(C=C3NC(=C4)C=C3)C=C2)=CC=C1C=C1C=CC4=N1 Chemical compound [Co].N1C(C=C2N=C(C=C3NC(=C4)C=C3)C=C2)=CC=C1C=C1C=CC4=N1 NVJHHSJKESILSZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
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- 230000007613 environmental effect Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
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- 239000008204 material by function Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
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Abstract
Description
技术领域
本发明涉及功能材料技术领域,具体涉及一种含氮二维聚合物薄膜及其制备方法和应用。
背景技术
二维聚合物薄膜具有纳米尺度的厚度、巨大的比表面积、多活性中心、多孔结构等性质,这些性质使得二维聚合物薄膜在能源存储、电子信息、化工环保等领域具有重要的应用。
目前,具有大横向面积的二维聚合物薄膜主要通过界面法制备,该类界面包括金属固体界面和液体界面(如甲苯)。传统金属固体界面稳定,但制备的材料难以完整地从界面上分离下来,并且金属固体界面价格昂贵,每次制备完一张膜后,不易进行下一步清洗以备重复使用。液体界面一般价格低廉,制备所得的膜也容易从界面上转移出来,但液体界面不稳定,容易受到外界的干扰。
为了综合利用固体界面和液体界面的优势,有必要开发一种兼具固体界面和液体界面优势的新型界面,该界面在单体聚合的时候,保持固态,在聚合生成二维聚合物薄膜后,可以轻易地转化为液态。
发明内容
基于上述现有技术,本发明提供了一种含氮二维聚合物薄膜及其制备方法和应用,该聚合物薄膜横向尺度大、厚度薄,可用于制备场效应晶体管,还可以作为电催化水裂解产氢的催化剂。
该聚合物薄膜制备方法条件温和,操作简单。
实现本发明上述目的所采用的技术方案为:
一种含氮二维聚合物薄膜,其结构单元的通式为:
所述的含氮二维聚合物薄膜为单层结构,或者由单层结构周期性紧密堆积而成的多层结构。
一种含氮二维聚合物薄膜的制备方法,包括如下步骤:
1、将三聚氯氰单体溶解在与水互不相溶的有机溶剂中,得到有机溶液;
2、将碱和胺类单体溶解在水中,得到碱性溶液,将碱性溶液进行冷冻结冰;
3、将有机溶液置于结冰的碱性溶液上,形成界面,在碱性溶液结冰的温度下静置1-60天,在界面处生成所述的含氮二维聚合物薄膜,将结冰的碱性溶液融化,得到所述的含氮二维聚合物薄膜。
进一步,当结构单元的通式为式(Ⅰ)和式(Ⅱ)时,胺类单体的结构通式为:
其中,m为正整数,且1≤m≤21;
当结构单元的通式为式(Ⅲ)和式(Ⅳ)时,胺类单体的结构通式为:
其中,X为CH或N。
进一步,所述的碱为Cs2CO3、K2CO3、Na2CO3、Li2CO3、CaCO3、MgCO3、CsOH、CsHCO3、KHCO3、NaHCO3、LiHCO3、KOH、NaOH、LiOH、Ca(OH)2、Mg(OH)2、三乙胺、吡啶或派啶。
进一步,所述的有机溶剂为碳原子数为5-25的烷烃、甲苯、乙苯、二甲苯、三甲苯、石油醚、氯苯、二氯苯、三氯苯、二氯甲烷、三氯甲烷、二氯乙烷、四氯乙烷、三氯乙烷、四氯化碳、乙酸乙酯或乙酸甲酯。
一种含氮二维聚合物薄膜在制备场效应晶体管中的应用。
一种含氮二维聚合物薄膜在作为电催化水裂解产氢催化剂中的应用。
与现有技术相比,本发明的有益效果和优点在于:
1、本发明的聚合物薄膜横向尺度大、厚度薄,且不需要依赖于基底,可以独立稳定存在,该聚合物薄膜可用于制备场效应晶体管,还可以作为电催化水裂解产氢的催化剂。
2、该聚合物的制备方法中,利用冰面作为界面,冰面廉价环保,又可以方便地变成液态水界面,其兼具了固体界面和液体界面的优点。
附图说明
图1为实施例1制备的含氮二维聚合物薄膜的光学照片。
图2为实施例1制备的含氮二维聚合物薄膜的原子力显微镜图(标尺:1um)。
图3为实施例1制备的含氮二维聚合物薄膜的扫描电子显微镜图(标尺:20um)。
图4为实施例1制备的含氮二维聚合物薄膜的电子能谱面扫描图。
图5为实施例1制备的含氮二维聚合物薄膜的透射电子显微镜图(标尺:2um)。
图6为实施例1制备的含氮二维聚合物薄膜的红外光谱图和拉曼光谱图。
图7为实施例1制备的聚合物薄膜中C元素的X射线光电子能谱图。
图8为实施例1制备的聚合物薄膜中N元素的X射线光电子能谱图。
图9为实施例1制备的聚合物薄膜的紫外-可见光谱图。
图10为实施例2制备的含氮二维聚合物薄膜的光学照片。
图11为实施例2制备的含氮二维聚合物薄膜的原子力显微镜图(标尺:2um)。
图12为实施例2制备的含氮二维聚合物薄膜的扫描电子显微镜图(标尺:2um)。
图13为实施例2制备的含氮二维聚合物薄膜的电子能谱面扫描图。
图14为实施例2制备的含氮二维聚合物薄膜的透射电子显微镜图(标尺:5um)。
图15为实施例2制备的含氮二维聚合物薄膜的红外光谱图和拉曼光谱图。
图16为实施例2制备的聚合物薄膜中C元素的X射线光电子能谱图。
图17为实施例2制备的聚合物薄膜中N元素的X射线光电子能谱图。
图18为实施例2制备的聚合物薄膜的紫外-可见光谱图。
具体实施方式
下面结合具体实施例对本发明进行详细说明。
实施例1
1、在容器A中,将92.3mg三聚氯氰(CAS号:108-77-0,阿拉丁试剂)溶于100mL-16℃的甲苯中,得到有机溶液;
2、在容器B中,将81.1mg对苯二胺(CAS号:106-50-3,阿拉丁试剂)和200mg氢氧化钾溶解在100mL水中,得到碱性溶液,将碱性溶液-16℃下快速冷冻结冰;
3、将容器A中的有机溶液倒入容器B中,将容器B在-16℃下静置30天,静置完成后,倒出容器B中冰面上方的溶液,用50mL-16℃的甲苯轻轻洗涤容器B中的冰面三次,将容器B中的冰融化,即可得到悬浮在水面上的含氮二维聚合物薄膜。
4、按照上述的方法一次做多个平行样品,便于后面一系列的测试。
将上述步骤3所得的含氮二维聚合物薄膜进行拍照,所得的光学照片如图1所示,从图1可知,所得的含氮二维聚合物薄膜的横向尺寸可达20cm,可达分米级别。
用表面平整的硅圆将其中一个容器B中的聚合物薄膜捞出来,并使用乙醇和水依次清洗三次,自然晾干后在室温下真空干燥,用原子力显微镜观察,所得的原子力显微镜图如图1所示,由图2可知,所得的聚合物薄膜表面平整,厚度约为3.5nm。
用铜网将其中一个容器B中的聚合物薄膜捞出来,并使用乙醇和水依次清洗三次,自然晾干后在室温下真空干燥,用扫描电子显微镜观察,所得的扫描电子显微镜图如图3所示,从图3可以看出,所得的聚合物薄膜可以独立稳定的悬挂在铜网上。
对聚合物薄膜位于图3中方框的位置进行电子能谱扫描,所得C和N元素的电子能谱面扫描图如图4所示,图4显示材料由碳和氮元素组成,并且这两种元素在材料内分布均匀。
用微栅碳铜网将其中一个容器B中的聚合物薄膜捞出来,并使用乙醇和水依次清洗三次,自然晾干后在室温下真空干燥,用透射电子显微镜观察,所得的透射电子显微镜图如图5所示,从图5可以看出,所得的聚合物薄膜具有层状结构。
对所得的聚合物薄膜进行红外光谱分析和拉曼光谱分析,所得的红外光谱图和拉曼光谱图如图6所示,红外光谱图显示,所得的聚合物薄膜具有三嗪环(1450cm-1)、对位取代的苯环(2924、1611、880、1760cm-1)、连接三嗪环和苯环的NH(3430、702cm-1)及C-N(1240、2480cm-1);拉曼光谱图显示,所得的聚合物薄膜具有响应的C=C和C=N。
对所得的聚合物薄膜进行X射线光电子能谱分析,所得的C元素的X射线光电子能谱图和N元素的X射线光电子能谱图分别如图7和图8所示,由图7可知,碳元素可以分为三种价态,位于284.5、285.6和287.8eV价态的碳的摩尔比为2:1:1,这三种碳分别对应于苯环上与取代基邻位的碳、苯环上与取代基相连的碳以及三嗪环上的碳;由图8可知,氮元素可以分为两种价态,位于398.7和399.9eV价态的氮的摩尔比为1:1,这两种氮分别对应于连接三嗪环和苯环的NH和三嗪环上的氮。
对所得的聚合物薄膜进行紫外-可见吸收光谱分析,所得的紫外-可见吸收光谱图如图9所示,由图9可知,所得的聚合物薄膜具有三嗪环(204nm)和苯环(204、251nm)的特征吸收峰,另外,其具有宽吸收特征峰(276、314nm),说明其具有大共轭结构。
以上所有的分析表明,本实施例所制备的聚合物薄膜具有以下结构单元:
将本实施例制备的聚合物薄膜作为沟道材料制备场效应晶体管,测得所得的场效应晶体管的载流子迁移率为1.2×10-3cm2/V·s。
将本实施例制备的聚合物薄膜作为催化剂沉积在铜片上,作为试验工作电极,采用线性扫描伏安法测试试验工作电极的电催化水裂解产氢性能;
测试条件为:电解液为0.5M的硫酸溶液、参比电极为饱和甘汞电极、对电极为碳棒,使用试验工作电极时,电流密度为10mA/cm2时产氢所需的过电位为463mV,优于相同测试条件下N掺杂的石墨烯材料的490mV和P掺杂的石墨烯材料的553mV(参考Y.Zheng,Y.Jiao,L.H.Li,T.Xing,Y.Chen,M.Jaroniec and S.Z.Qiao,ACS Nano,2014,8,5290-5296)。
测试条件为:电解液为1M的氢氧化钾溶液、参比电极为Ag/AgCl电极、对电极为碳棒,使用试验工作电极时,电流密度为10mA/cm2时产氢所需的过电位为422mV,优于大多数碳基无金属催化剂,如N,P-石墨烯(580mV),N-石墨烯(640mV),S-石墨烯(720mV),N-carbon(780mV)和多壁碳纳米管(800mV)(参考K.Qu,Y.Zheng,Y.Jiao,X.Zhang,S.Dai and S.-Z.Qiao,Adv.Energy Mater.,2017,7,1602068)。
实施例2
1、在容器A中,将92.3mg三聚氯氰(CAS号:108-77-0,阿拉丁试剂)溶于100mL-16℃的甲苯中,得到有机溶液;
2、在容器B中,将116.3mg 1,3,5-三氨基苯三盐酸盐(CAS号:638-09-5,阿拉丁试剂)和200mg氢氧化钾溶解在100mL水中,得到碱性溶液,将碱性溶液-16℃下快速冷冻结冰;
3、将容器A中的有机溶液倒入容器B中,将容器B在-16℃下静置30天,静置完成后,倒出容器B中冰面上方的溶液,用50mL-16℃的甲苯轻轻洗涤容器B中的冰面三次,将容器B中的冰融化,即可得到悬浮在水面上的含氮二维聚合物薄膜。
4、按照上述的方法一次做多个平行样品,便于后面一系列的测试。
将上述步骤3所得的含氮二维聚合物薄膜进行拍照,所得的光学照片如图10所示,从图10可知,所得的含氮二维聚合物薄膜的横向尺寸可达20cm,可达分米级别。
用表面平整的硅圆将其中一个容器B中的聚合物薄膜捞出来,并使用乙醇和水依次清洗三次,自然晾干后在室温下真空干燥,用原子力显微镜观察,所得的原子力显微镜图如图11所示,由图11可知,所得的聚合物薄膜表面平整,厚度约为10nm。
用铜网将其中一个容器B中的聚合物薄膜捞出来,并使用乙醇和水依次清洗三次,自然晾干后在室温下真空干燥,用扫描电子显微镜观察,所得的扫描电子显微镜图如图12所示,从图12可以看出,所得的聚合物薄膜可以独立稳定的悬挂在铜网上。
对聚合物薄膜位于图12中方框的位置进行电子能谱扫描,所得C和N元素的电子能谱面扫描图如图13所示,图13显示材料由碳和氮元素组成,并且这两种元素在材料内分布均匀。
用微栅碳铜网将其中一个容器B中的聚合物薄膜捞出来,并使用乙醇和水依次清洗三次,自然晾干后在室温下真空干燥,用透射电子显微镜观察,所得的透射电子显微镜图如图14所示,从图14可以看出,所得的聚合物薄膜具有层状结构。
对所得的聚合物薄膜进行红外光谱分析和拉曼光谱分析,所得的红外光谱图和拉曼光谱图如图15所示,红外光谱图显示,所得的聚合物薄膜具有三嗪环(1416cm-1)、1,3,5-三取代的苯环(1176cm-1;2352cm-1);拉曼光谱图显示,所得的聚合物薄膜具有响应的C=C和C=N。
对所得的聚合物薄膜进行X射线光电子能谱分析,所得的C元素的X射线光电子能谱图和N元素的X射线光电子能谱图分别如图16和图17所示,由图16可知,碳元素可以分为三种价态,位于283.5、284.9和287.0eV价态的碳的摩尔比为1:1:1,这三种碳分别对应于苯环上、苯环上与取代基相连的碳以及三嗪环上的碳;由图15可知,氮元素可以分为两种价态,位于397.9和399.1eV价态的氮的摩尔比为1:1,这两种氮分别对应于连接三嗪环和苯环的NH和三嗪环上的氮。
对所得的聚合物薄膜进行紫外-可见吸收光谱分析,所得的紫外-可见吸收光谱图如图8所示,由图8可知,所得的聚合物薄膜具有三嗪环和苯环(245nm)的特征吸收峰,另外,其具有宽吸收特征峰(285nm),说明其具有大共轭结构。
以上所有的分析表明,本实施例所制备的聚合物薄膜具有以下结构单元:
将本实施例制备的聚合物薄膜作为沟道材料制备场效应晶体管,测得所得的场效应晶体管的载流子迁移率为2.6×10-3cm2/V·s。
将本实施例制备的聚合物薄膜作为催化剂沉积在铜片上,作为试验工作电极,采用线性扫描伏安法测试试验工作电极的电催化水裂解产氢性能;
测试条件为:电解液为0.5M的硫酸溶液、参比电极为饱和甘汞电极、对电极为碳棒,使用试验工作电极时,电流密度为10mA/cm2时产氢所需的过电位为424mV,优于相同测试条件下N掺杂的石墨烯材料的490mV和P掺杂的石墨烯材料的553mV(参照Y.Zheng,Y.Jiao,L.H.Li,T.Xing,Y.Chen,M.Jaroniec and S.Z.Qiao,ACS Nano,2014,8,5290-5296)。
测试条件为:电解液为1M的氢氧化钾溶液、参比电极为Ag/AgCl电极、对电极为碳棒,使用试验工作电极时,电流密度为10mA/cm2时产氢所需的过电位为375mV,优于大多数碳基无金属催化剂,如N,P-石墨烯(580mV),N-石墨烯(640mV),S-石墨烯(720mV),N-carbon(-0.78V)和多壁碳纳米管(800mV)(参照K.Qu,Y.Zheng,Y.Jiao,X.Zhang,S.Dai and S.-Z.Qiao,Adv.Energy Mater.,2017,7,1602068),甚至优于部分含金属的二维材料,如二维钴-卟啉聚合物1mA/cm2时367mV的过电位(参照H.Sahabudeen,H.Qi,B.A.Glatz,D.Tranca,R.Dong,Y.Hou,T.Zhang,C.Kuttner,T.Lehnert,G.Seifert,U.Kaiser,A.Fery,Z.Zhengand X.Feng,Nat.Commun.,2016,7,13461.)。
Claims (4)
3.根据权利要求1所述的含氮二维聚合物薄膜的制备方法,其特征在于:所述的碱为Cs2CO3、K2CO3、Na2CO3、Li2CO3、CaCO3、MgCO3、CsOH、CsHCO3、KHCO3、NaHCO3、LiHCO3、KOH、NaOH、LiOH、Ca(OH)2、Mg(OH)2、三乙胺、吡啶或派啶。
4.根据权利要求1所述的含氮二维聚合物薄膜的制备方法,其特征在于:所述的有机溶剂为碳原子数为5-25的烷烃、甲苯、乙苯、二甲苯、三甲苯、石油醚、氯苯、二氯苯、三氯苯、二氯甲烷、三氯甲烷、二氯乙烷、四氯乙烷、三氯乙烷、四氯化碳、乙酸乙酯或乙酸甲酯。
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