CN108273498A - 一种Rh的超薄二维纳米片及其制备方法 - Google Patents
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- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000010948 rhodium Substances 0.000 claims abstract description 63
- 239000000725 suspension Substances 0.000 claims abstract description 43
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- 150000003284 rhodium compounds Chemical class 0.000 claims abstract description 21
- 239000002904 solvent Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
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- 229910052703 rhodium Inorganic materials 0.000 claims description 19
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 19
- QGLWBTPVKHMVHM-KTKRTIGZSA-N (z)-octadec-9-en-1-amine Chemical compound CCCCCCCC\C=C/CCCCCCCCN QGLWBTPVKHMVHM-KTKRTIGZSA-N 0.000 claims description 14
- FQNHWXHRAUXLFU-UHFFFAOYSA-N carbon monoxide;tungsten Chemical group [W].[O+]#[C-].[O+]#[C-].[O+]#[C-].[O+]#[C-].[O+]#[C-].[O+]#[C-] FQNHWXHRAUXLFU-UHFFFAOYSA-N 0.000 claims description 8
- -1 oleyl amines Chemical class 0.000 claims description 8
- 238000006555 catalytic reaction Methods 0.000 abstract description 3
- 239000011148 porous material Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000002086 nanomaterial Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000000089 atomic force micrograph Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910021389 graphene Inorganic materials 0.000 description 2
- 238000002173 high-resolution transmission electron microscopy Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 125000000218 acetic acid group Chemical group C(C)(=O)* 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- 239000011943 nanocatalyst Substances 0.000 description 1
- VHRIFOUDVVZPAO-UHFFFAOYSA-N propan-2-one rhodium Chemical compound [Rh].CC(=O)C VHRIFOUDVVZPAO-UHFFFAOYSA-N 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
本发明公开了一种Rh的超薄二维纳米片,其具有多孔结构;粒径尺寸在50nm‑400nm之间,厚度为0.4nm‑1nm。本发明还提出了一种所述Rh的超薄二维纳米片的制备方法,包括:以铑化合物为原料制备前驱体悬浊液,之后将前驱体悬浊液与capping剂和溶剂混合后进行反应得到所述Rh的超薄二维纳米片。本发明提出的Rh的超薄二维纳米片的制备方法,过程简单,条件温和,得到的纳米片具有连续的网络状孔洞结构,且厚度小,比表面积特别大,暴露的活性位点多,原子的利用率特别高,稳定性较好,在催化之中有着巨大的潜力。
Description
技术领域
本发明涉及纳米催化剂技术领域,尤其涉及一种Rh的超薄二维纳米片及其制备方法。
背景技术
“纳米科学”最初的设想来自于著名物理学家费曼1959年在加州理工大学的一次演讲,自20世纪90年代兴起。纳米科学被认为是对21世纪一系列高新技术的产生和发展有极为重要影响的一门热点学科,被世界各国列为21世纪的关键技术之一,并投入大量的人力物力进行研究开发。
超薄的二维纳米材料是一类新兴的纳米材料类别,其具有片状结构,水平尺寸超过100nm或几个微米甚至更大,但是厚度只有单个或几个原子厚(典型厚度小于5nm)。尽管对于二维材料的探索可以追溯到几十年前,但2004年才标志着超薄纳米材料的诞生,那年Novoselov和Geim及其合作者成功地使用胶带,也就是现今被称为微机械剥离的方法从石墨上剥离出了石墨烯。由于电子被限制在二维的环境中,因此二维材料表现出了独特的物理、电子和化学特性。现今,诸多类石墨烯的其他材料也已经被研究出来,诸如六方氮化硼(h-BN)、过渡金属硫化物(TMDs)、石墨氮化碳(g-C3N4)、层状金属氧化物和层状双氢氧化物等,但金属超薄二维纳米材料的合成还存在很大挑战。因此,制备金属超薄二维纳米材料意义重大。
发明内容
基于背景技术存在的技术问题,本发明提出了一种Rh的超薄二维纳米片及其制备方法,所述制备方法过程简单,条件温和,得到的纳米片具有连续的网络状孔洞结构,且厚度小,比表面积特别大,暴露的活性位点多,原子的利用率特别高,稳定性较好,在催化之中有着巨大的潜力。
本发明提出的一种Rh的超薄二维纳米片,其具有多孔结构。
优选地,其粒径尺寸在50nm-400nm之间。
优选地,其厚度为0.4nm-1nm。
本发明还提出的一种所述Rh的超薄二维纳米片的制备方法,包括以下步骤:以铑化合物为原料制备前驱体悬浊液,之后将前驱体悬浊液与capping剂和溶剂混合后进行反应得到所述Rh的超薄二维纳米片。
优选地,所述铑化合物为乙酰丙酮铑。
优选地,以铑化合物为原料制备前驱体悬浊液的工艺如下:常温下将乙酰丙酮铑加入油胺之中,使用摇床分散均匀得到前驱体悬浊液。
优选地,乙酰丙酮铑的质量与油胺的体积比为35-45:2-7mg/ml。
优选地,以铑化合物为原料制备前驱体悬浊液的工艺如下:常温下将40mg乙酰丙酮铑加入5ml油胺之中,使用摇床分散30-60min,得到前驱体悬浊液。
优选地,每1ml前驱体悬浊液与25-35mg capping剂和2-6ml溶剂混合后进行反应。
优选地,每1ml前驱体悬浊液与30mg capping剂和4ml溶剂混合后进行反应。
优选地,所述capping剂为羰基钨;所述溶剂为油胺。
优选地,反应的温度为165-185℃,反应的时间为1h-2h。
优选地,所述Rh的超薄二维纳米片的制备方法,包括以下步骤:常温下将40mg乙酰丙酮铑加入5ml油胺之中,使用摇床分散30min,得到前驱体悬浊液;将1ml前驱体悬浊液加入20ml反应容器中,加入30mg的羰基钨与4ml油胺混合均匀,在180℃下反应1.5h得到所述Rh的超薄二维纳米片。
本发明首次制备出铑的超薄二维纳米多孔片,原子利用率极高,有望应用于多种实际催化之中,如汽车尾气处理,一氧化碳处理之中。
附图说明
图1为本发明实施例5所得Rh的超薄二维纳米片的透射电子显微镜像;
图2为本发明实施例5所得Rh的超薄二维纳米片的高分辨透射电子显微镜像;
图3为本发明实施例5所得Rh的超薄二维纳米片的原子力显微镜图像。
具体实施方式
下面,通过具体实施例对本发明的技术方案进行详细说明。
实施例1
本发明提出的一种Rh的超薄二维纳米片,其具有多孔结构。
本发明还提出的一种所述Rh的超薄二维纳米片的制备方法,包括以下步骤:以铑化合物为原料制备前驱体悬浊液,之后将前驱体悬浊液与capping剂和溶剂混合后进行反应得到所述Rh的超薄二维纳米片。
实施例2
本发明提出的一种Rh的超薄二维纳米片,其具有多孔结构,其粒径尺寸在50nm-85nm之间,其厚度为0.6nm-1nm。
本发明还提出的一种所述Rh的超薄二维纳米片的制备方法,包括以下步骤:以铑化合物为原料制备前驱体悬浊液,之后将前驱体悬浊液与capping剂和溶剂混合后进行反应得到所述Rh的超薄二维纳米片;
其中,所述铑化合物为乙酰丙酮铑;
以铑化合物为原料制备前驱体悬浊液的工艺如下:常温下将乙酰丙酮铑加入油胺之中,使用摇床分散均匀得到前驱体悬浊液;其中,乙酰丙酮铑的质量与油胺的体积比为35:7mg/ml;
每1ml前驱体悬浊液与25mg capping剂和6ml溶剂混合后进行反应;
所述capping剂为羰基钨;所述溶剂为油胺;
反应的温度为185℃,反应的时间为1h。
实施例3
本发明提出的一种Rh的超薄二维纳米片,其具有多孔结构,其粒径尺寸在100nm-400nm之间,其厚度为0.4nm-0.7nm。
本发明还提出的一种所述Rh的超薄二维纳米片的制备方法,包括以下步骤:以铑化合物为原料制备前驱体悬浊液,之后将前驱体悬浊液与capping剂和溶剂混合后进行反应得到所述Rh的超薄二维纳米片;
其中,所述铑化合物为乙酰丙酮铑;
以铑化合物为原料制备前驱体悬浊液的工艺如下:常温下将乙酰丙酮铑加入油胺之中,使用摇床分散均匀得到前驱体悬浊液;其中,乙酰丙酮铑的质量与油胺的体积比为45:2mg/ml;
每1ml前驱体悬浊液与35mg capping剂和2ml溶剂混合后进行反应;
所述capping剂为羰基钨;所述溶剂为油胺;
反应的温度为165℃,反应的时间为2h。
实施例4
本发明提出的一种Rh的超薄二维纳米片,其具有多孔结构,其粒径尺寸在50nm-400nm之间,其厚度为0.4nm-1nm。
本发明还提出的一种所述Rh的超薄二维纳米片的制备方法,包括以下步骤:以铑化合物为原料制备前驱体悬浊液,之后将前驱体悬浊液与capping剂和溶剂混合后进行反应得到所述Rh的超薄二维纳米片;
其中,所述铑化合物为乙酰丙酮铑;
以铑化合物为原料制备前驱体悬浊液的工艺如下:常温下将40mg乙酰丙酮铑加入5ml油胺之中,使用摇床分散60min,得到前驱体悬浊液;
每1ml前驱体悬浊液与30mg capping剂和4ml溶剂混合后进行反应;
所述capping剂为羰基钨;所述溶剂为油胺;
反应的温度为180℃,反应的时间为1.5h。
实施例5
本发明提出的一种Rh的超薄二维纳米片,其具有多孔结构,其粒径尺寸在50nm-400nm之间,其厚度为0.4nm-1nm。
本发明提出的所述Rh的超薄二维纳米片的制备方法,包括以下步骤:首先利用铑化合物制备前驱体悬浊液,之后将1ml前驱体悬浊液加入20ml反应瓶中,并加入30mg的capping剂羰基钨与4ml油胺混合均匀,在180℃下反应1.5h,得到所述Rh的超薄二维纳米片;
其中,利用铑化合物制备前驱体悬浊液的工艺为:常温下将40mg乙酰丙酮铑加入到5ml油胺之中,使用摇床分散30min,得到前驱体悬浊液。
图1为本发明实施例5所得Rh的超薄二维纳米片的透射电子显微镜像;由图1可知,该方法制备的铑的超薄二维纳米多孔片尺寸在50-400nm之间。
图2为本发明实施例5所得Rh的超薄二维纳米片的高分辨透射电子显微镜像;由图2可知,在微观层面上,该方法制备的铑的超薄二维纳米多孔片具有明确的多孔结构。
图3为本发明实施例5所得Rh的超薄二维纳米片的原子力显微镜图像;由图3可知,该方法制备的铑的超薄二维纳米多孔片厚度为0.5nm,可认为是单层铑原子构成的。
以上所述,仅为本发明较佳的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,根据本发明的技术方案及其发明构思加以等同替换或改变,都应涵盖在本发明的保护范围之内。
Claims (10)
1.一种Rh的超薄二维纳米片,其特征在于,其具有多孔结构。
2.根据权利要求1所述Rh的超薄二维纳米片,其特征在于,其粒径尺寸在50nm-400nm之间。
3.根据权利要求1或2所述Rh的超薄二维纳米片,其特征在于,其厚度为0.4nm-1nm。
4.一种如权利要求1-3中任一项所述Rh的超薄二维纳米片的制备方法,其特征在于,包括以下步骤:以铑化合物为原料制备前驱体悬浊液,之后将前驱体悬浊液与capping剂和溶剂混合后进行反应得到所述Rh的超薄二维纳米片。
5.根据权利要求4所述Rh的超薄二维纳米片的制备方法,其特征在于,所述铑化合物为乙酰丙酮铑。
6.根据权利要求5或6所述Rh的超薄二维纳米片的制备方法,其特征在于,以铑化合物为原料制备前驱体悬浊液的工艺如下:常温下将乙酰丙酮铑加入油胺之中,使用摇床分散均匀得到前驱体悬浊液;优选地,乙酰丙酮铑的质量与油胺的体积比为35-45:2-7mg/ml;优选地,以铑化合物为原料制备前驱体悬浊液的工艺如下:常温下将40mg乙酰丙酮铑加入5ml油胺之中,使用摇床分散30-60min,得到前驱体悬浊液。
7.根据权利要求4-6中任一项所述Rh的超薄二维纳米片的制备方法,其特征在于,每1ml前驱体悬浊液与25-35mg capping剂和2-6ml溶剂混合后进行反应;优选地,每1ml前驱体悬浊液与30mg capping剂和4ml溶剂混合后进行反应。
8.根据权利要求4-7中任一项所述Rh的超薄二维纳米片的制备方法,其特征在于,所述capping剂为羰基钨;所述溶剂为油胺。
9.根据权利要求4-8中任一项所述Rh的超薄二维纳米片的制备方法,其特征在于,反应的温度为165-185℃,反应的时间为1h-2h。
10.根据权利要求4-9中任一项所述Rh的超薄二维纳米片的制备方法,其特征在于,包括以下步骤:常温下将40mg乙酰丙酮铑加入5ml油胺之中,使用摇床分散30min,得到前驱体悬浊液;将1ml前驱体悬浊液加入20ml反应容器中,加入30mg的羰基钨与4ml油胺混合均匀,在180℃下反应1.5h得到所述Rh的超薄二维纳米片。
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