CN105967178A - 一种用藻类植物制备的石墨烯量子点及其在制备量子点敏化太阳能电池中的应用 - Google Patents
一种用藻类植物制备的石墨烯量子点及其在制备量子点敏化太阳能电池中的应用 Download PDFInfo
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Abstract
本发明提供了一种用藻类植物制备的石墨烯量子点及其在制备量子点敏化太阳能电池中的应用,本发明具体是将紫菜等原料与硫酸进行水热反应即生成石墨烯量子点。本发明充分利用靠近海洋的有利条件,选择含有还原性糖较多的藻类植物,如紫菜、海带、线性刚毛藻、裙带菜等,一步法制备石墨烯量子点,并与量子点敏化太阳能电池相结合。采用本发明制备的石墨烯量子点制备方法简便易行、价格低廉、对环境无任何污染。
Description
技术领域
本发明属于量子点技术领域,特别涉及一种用藻类植物制备的石墨烯量子点及其在制备量子点敏化太阳能电池中的应用。
背景技术
纳米材料被誉为“21世纪最有前途的材料”,而石墨烯量子点因其较强的量子限边效应和带边效应而广受关注。石墨烯量子点是石墨烯家族中的新成员,石墨烯量子点除了具备石墨烯的大的比表面积、高的载流子迁移率等优异性能外,还有良好的化学惰性,较好的生物相容性等优点;还因为其尺寸极小而展现出了边界效应等一系列新的特性。正是由于石墨烯量子点的独特性质,目前已广泛应用于生物传感、光伏器件等诸多领域。
发明内容
针对现有的石墨烯量子点的制备方法,本发明提供了一种用藻类植物制备的石墨烯量子点及其在制备量子点敏化太阳能电池中的应用,本发明采用简单方便的水热法制备得到的石墨烯量子点稳定性好。本发明碳源采用了裙带菜、紫菜、线性刚毛藻、海带等藻类植物,充分利用靠近海洋的条件,制备出水溶性的石墨烯量子点。制备所需原料均属于海洋植物,制备方法简单方便,具有较高的研究意义与价值。
为实现上述发明目的,本发明采用以下技术方案予以实现:
一种用藻类植物制备的石墨烯量子点,它通过以下步骤获得:
(1)、将藻类植物用水浸泡后,放入烘箱,烘干后研磨成粉状;
(2)、称取藻类植物的粉末溶解在水中;
(3)、向步骤(2)制得的溶液中加入浓硫酸,密封搅拌作为前驱体溶液;
(4)、将所述前驱体溶液移入反应釜内,放入烘箱中进行反应;
(5)、将上述反应产物过滤,放入透析膜中透析得到石墨烯量子点。
进一步的:其特征在于:所述步骤(1)中藻类植物均需用水浸泡2~4天,换水4~8次。
进一步的:所述步骤(1)中的藻类植物与步骤(2)中的浓硫酸的质量比为1:1.5~3.5。
进一步的:所述步骤(4)中烘箱温度为170℃,时间为4~8小时。
进一步的:所述步骤(5)透析膜为1000道尔顿,换水3~5次即可得到石墨烯量子点。
本发明还提供了所述的石墨烯量子点在制备量子点敏化太阳能电池中的应用。
进一步的:所述量子点敏化太阳能电池通过以下步骤制得:
(1)、制备二氧化钛胶体,将二氧化钛胶体涂于FTO导电玻璃基体上,高温煅烧制备介孔二氧化钛薄膜,;
(2)、将步骤(1)制备的光阳极浸泡在所述制备的石墨烯量子点中,制成量子点太阳能电池的光阳极;
(3)、利用热解法制备铂对电极;
(4)、将步骤(2)制备的光阳极与步骤(3)制备的铂对电极组装成量子点敏化太阳能电池。
进一步的:所述步骤(2)中光阳极在石墨烯量子点的水溶液中浸泡时间为40~80小时。
进一步的:所述步骤(4)中液体电解质由0.01~0.06 mol/L碘、0.08~0.12 mol/L碘化锂、0.4~0.8 mol/L四丁基碘化铵和0.4~0.6 mol/L 4-叔丁基吡啶的乙腈溶液组成。
进一步的:所述量子点敏化太阳能电池的开路电压为0.3~0.6V、短路电流为0.3~0.7mA·cm-2、光电转换效率为0.1~0.3%。
本发明采用上述技术方案后,主要有以下优点:
(1)、制备工艺简单。本发明以藻类为碳源制备石墨烯量子点,只需一步合成即可得到,制备方法简单易行。
(2)、可大批量生产。本发明制备方法简单可行,可短时间内一次性制备大量的石墨烯量子点。
(3)、制备成本低。本发明所需实验药品均为常见藻类植物,尤其是具备靠近海洋的有利条件,反应物取自海洋,制备成本低。
本发明的石墨烯量子点制备方法简便易行、成本低廉,而且制备得到的石墨烯量子点发光颜色可调控、稳定性好、产率高。
附图说明
图1为本发明以紫菜为碳源所制备的石墨烯量子点的高倍透射图谱。
图2为本发明以线性刚毛藻为碳源所制备的石墨烯量子点紫外吸收图谱,图中百分比表示去离子水占总体积的百分比。
图3为本发明以线性刚毛藻为碳源所制备的石墨烯量子点的发射谱。
图4为本发明以线性刚毛藻为碳源制备的石墨烯量子点在紫外灯照射下的发光效应。
图5为本发明以紫菜为碳源制备的石墨烯量子点在电池中的J-V曲线。
具体实施方式
下面结合具体实施方式对本发明的技术方案作进一步详细的说明。
实施例1
一、本发明用藻类植物制备的石墨烯量子点通过以下步骤制得:
1、制备石墨烯量子点的碳源:作为碳源的紫菜、海带、线性刚毛藻、裙带菜,用去离子水浸泡2~4天,换水4~8次,后放入烘箱,60~80℃放置24小时后,研磨成粉状;
2、将紫菜等作为碳源的原料称取0.3~0.6g,溶解在40mL去离子水中;
3、将所述溶液中加入质量分数为98%的浓硫酸80~200μL,密封搅拌10~20分钟作为前驱体溶液;
本发明中所述步骤(1)中的天然大分子碳源的质量与步骤(2)中的浓硫酸的质量比在1:1.5~3.5范围内,所述质量的单位为g,体积的单位为mL。
4、将步骤3所述前驱体溶液移入反应釜内,放入烘箱中进行反应;烘箱温度为140℃~180℃,时间为3~6小时;
5、将反应产物用滤纸一次过滤,放入透析膜中透析得到石墨烯量子点;所述透析膜为1000道尔顿,换水3~5次。
二、量子点敏化太阳能电池的制备
1、采用溶胶-水热法制备二氧化钛胶体,将二氧化钛胶体涂于FTO导电玻璃基体上,经400~500℃煅烧制备介孔二氧化钛薄膜;
2、将步骤1制备的二氧化钛薄膜浸泡在石墨烯量子点溶液中,浸泡时间为40~80小时;制成量子点太阳能电池的光阳极;
3、利用热解法制备铂对电极;
4、将步骤2制备的光阳极与步骤3制备的铂对电极组合,并在中间加入液体电解质组装成量子点敏化太阳能电池。
所述液体电解质由0.01~0.06 mol/L碘、0.08~0.12 mol/L碘化锂、0.4~0.8 mol/L四丁基碘化铵和0.4~0.6 mol/L 4-叔丁基吡啶的乙腈溶液组成;
本发明制得的所述量子点敏化太阳能电池开路电压为0.3~0.6V,短路电流为0.3~0.7mA·cm-2、光电转换效率为0.1~0.3%。
实施例2、本发明用藻类植物制得的石墨烯量子点的性能测试
1、图1是以紫菜为碳源所制备的石墨烯量子点的高倍透射图谱。
2、用紫外可见分光光度计进行测试。如图2所示是以线性刚毛藻为碳源一步法制备的石墨烯量子点的紫外图谱。较明显的吸收峰在280纳米左右,百分比表示去离子水占总体积的百分比,且随量子点浓度降低吸收峰强度降低。
3、用荧光光谱仪进行测试。如图3所示是以线性刚毛藻为碳源一步法制备的石墨烯量子点的发射谱。在不同激发波长的作用下,发射谱峰值出红移现象,且在激发波长为350纳米左右发射谱峰值最高。
4、用紫外灯进行照射后,如图4所示,紫外灯下以线性刚毛藻为碳源制备的石墨烯量子点发出蓝色光。
5、图5为本发明以紫菜为碳源制备的石墨烯量子点在电池中的J-V曲线。
以上实施例仅用以说明本发明的技术方案,而非对其进行限制;尽管参照前述实施例对本发明进行了详细的说明,对于本领域的普通技术人员来说,依然可以对前述实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或替换,并不使相应技术方案的本质脱离本发明所要求保护的技术方案的精神和范围。
Claims (10)
1.一种用藻类植物制备的石墨烯量子点,其特征在于:它通过以下步骤获得:
(1)、将藻类植物用水浸泡后,放入烘箱,烘干后研磨成粉状;
(2)、称取藻类植物的粉末溶解在水中;
(3)、向步骤(2)制得的溶液中加入浓硫酸,密封搅拌作为前驱体溶液;
(4)、将所述前驱体溶液移入反应釜内,放入烘箱中进行反应;
(5)、将上述反应产物过滤,放入透析膜中透析得到石墨烯量子点。
2.根据权利要求1所述的一种藻类植物制备石墨烯量子点的技术,其特征在于:其特征在于:所述步骤(1)中藻类植物均需用水浸泡2~4天,换水4~8次。
3.根据权利要求1所述的一种藻类植物制备石墨烯量子点的技术,其特征在于:所述步骤(1)中的藻类植物与步骤(2)中的浓硫酸的质量比为1:1.5~3.5。
4.根据权利要求1所述的一种藻类植物制备石墨烯量子点的技术,其特征在于:所述步骤(4)中烘箱温度为170℃,时间为4~8小时。
5.根据权利要求1所述的一种藻类植物制备石墨烯量子点的技术,其特征在于:所述步骤(5)透析膜为1000道尔顿,换水3~5次即可得到石墨烯量子点。
6.权利要求1所述的石墨烯量子点在制备量子点敏化太阳能电池中的应用。
7.根据权利要求6所述的石墨烯量子点在制备量子点敏化太阳能电池中的应用,其特征在于:所述量子点敏化太阳能电池通过以下步骤制得:
(1)、制备二氧化钛胶体,将二氧化钛胶体涂于FTO导电玻璃基体上,高温煅烧制备介孔二氧化钛薄膜,;
(2)、将步骤(1)制备的光阳极浸泡在所述制备的石墨烯量子点中,制成量子点太阳能电池的光阳极;
(3)、利用热解法制备铂对电极;
(4)、将步骤(2)制备的光阳极与步骤(3)制备的铂对电极组装成量子点敏化太阳能电池。
8.根据权利要求7所述的石墨烯量子点在制备量子点敏化太阳能电池中的应用,其特征在于:所述步骤(2)中光阳极在石墨烯量子点的水溶液中浸泡时间为40~80小时。
9.根据权利要求7所述的石墨烯量子点在制备量子点敏化太阳能电池中的应用,其特征在于:所述步骤(4)中液体电解质由0.01~0.06 mol/L碘、0.08~0.12 mol/L碘化锂、0.4~0.8 mol/L四丁基碘化铵和0.4~0.6 mol/L 4-叔丁基吡啶的乙腈溶液组成。
10.根据权利要求6所述的石墨烯量子点在制备量子点敏化太阳能电池中的应用,其特征在于:所述量子点敏化太阳能电池的开路电压为0.3~0.6V、短路电流为0.3~0.7mA·cm-2、光电转换效率为0.1~0.3%。
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CN106596874A (zh) * | 2017-01-20 | 2017-04-26 | 中国海洋大学 | 一种淀粉类食品中的碳量子点及其检测方法和应用 |
CN106892419A (zh) * | 2017-01-20 | 2017-06-27 | 中国海洋大学 | 一种海产品制备的碳量子点及其检测方法和应用 |
CN110078059A (zh) * | 2019-06-19 | 2019-08-02 | 昆明物理研究所 | 一种液相催化生长制备石墨烯的方法 |
CN114456805A (zh) * | 2022-01-27 | 2022-05-10 | 中原工学院 | 一种海藻衍生氯原子掺杂的石墨烯量子点的制备及其长波长激发细胞成像应用 |
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CN103738941A (zh) * | 2013-11-14 | 2014-04-23 | 盐城增材科技有限公司 | 一种石墨烯量子点的制备方法 |
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CN103738941A (zh) * | 2013-11-14 | 2014-04-23 | 盐城增材科技有限公司 | 一种石墨烯量子点的制备方法 |
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CN106892419A (zh) * | 2017-01-20 | 2017-06-27 | 中国海洋大学 | 一种海产品制备的碳量子点及其检测方法和应用 |
CN110078059A (zh) * | 2019-06-19 | 2019-08-02 | 昆明物理研究所 | 一种液相催化生长制备石墨烯的方法 |
CN114456805A (zh) * | 2022-01-27 | 2022-05-10 | 中原工学院 | 一种海藻衍生氯原子掺杂的石墨烯量子点的制备及其长波长激发细胞成像应用 |
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