阅读说明：本技术 用于制造微波还原氧化石墨烯的方法 (Method for manufacturing microwave reduced graphene oxide ) 是由 蒂·坦·吴 奥斯卡·佩雷斯维达尔 胡安·何塞·阿里瓦斯 大卫·诺列加佩雷斯 罗伯托·苏亚雷斯 于 2019-07-09 设计创作，主要内容包括：本发明涉及用于制造微波还原氧化石墨烯(MW-rGO)的方法,所述方法包括：提供氧化石墨烯(GO),使用还原剂将GO还原成还原氧化石墨烯(rGO),以及在催化剂的存在下,在空气气氛下通过进行微波处理将rGO还原成MW-rGO。(The present invention relates to a process for the manufacture of microwave reduced graphene oxide (MW-rGO), the process comprising: providing Graphene Oxide (GO), reducing GO to reduced graphene oxide (rGO) using a reducing agent, and reducing rGO to MW-rGO by performing microwave treatment in the presence of a catalyst under an air atmosphere.)

1. A method for manufacturing microwave reduced graphene oxide (MW-rGO), comprising:

A. providing Graphene Oxide (GO) comprising one or several layers of graphene comprising at least 25 wt% of oxygen functional groups,

B. reducing GO to a reduced graphene oxide (rGO) comprising one or more layers of graphene having oxygen functional groups in an amount of from 10 to 25 wt% using a reducing agent, and

C. reducing the rGO to a MW-rGO comprising one or several layers of graphene having less than 10 wt% of oxygen functional groups by microwave treatment of rGO in the presence of a catalyst under an air atmosphere.

2. The process according to claim 1, wherein in step B) the reducing agent is selected from: ascorbic acid; urea; hydrazine hydrate; alkaline solutions, such as NaOH or KOH; phenols, such as gallic acid, tannic acid, dopamine or tea polyphenols; alcohols, such as methanol, ethanol or isopropanol; glycine; sodium citrate or sodium borohydride.

3. The process according to claim 1 or 2, wherein in step B) the reduction is carried out at a temperature of 50 to 120 ℃.

4. The process of any one of claims 1 to 3, wherein in step B), the reduction is carried out in less than 24 hours.

5. The process according to any one of claims 1 to 4, wherein in step C) the catalyst is selected from: pristine graphene, graphene nanoplatelets, graphite, or graphite nanoplatelets.

6. The process of claim 5, wherein in step C), the catalyst is pristine graphene.

7. The process of any one of claims 1 to 6, wherein in step C), the weight ratio of rGO relative to the catalyst is as follows:

8. the process of claim 7, wherein in step C), the weight ratio of rGO relative to the catalyst is as follows:

9. the process according to any one of claims 1 to 8, wherein in step C) the microwave frequency is from 300MHz to 100 GHz.

10. The method according to claim 9, wherein in step C) the microwave frequency is 1000MHz to 5000 MHz.

11. The method according to any one of claims 1 to 10, wherein step C) is performed with a microwave frequency heating device.

12. The method of claim 11, wherein the microwave frequency heating apparatus is a microwave oven.

13. The method according to claim 12, wherein the microwaves have a power of 100W to 100 kW.

14. The method according to any one of claims 1 to 13, wherein in step C) the microwave treatment is carried out within at least 2 seconds.

Example (b):

all experiments were prepared by providing 2.5L of an aqueous solution containing GO with 52% oxygen functionality. GO in aqueous solution at concentration of 2g.L^-1GO. This aqueous solution was mixed with 5g L-ascorbic acid at 95 ℃ over 3 hours with mechanical stirring to obtain rGO.

After complete reduction of GO to rGO, rGO was washed with deionized water and lyophilized to obtain rGO powder. rGO has 17% oxygen functionality.

The rGO was then treated in a microwave oven (800W) under an air atmosphere. Optionally, a catalyst that is pristine graphene is added. rGO is reduced to MW-rGO by microwave treatment. Table 1 shows the results obtained:

according to the invention

Experiments according to the present invention show MW-rGO with less than 10% oxygen groups in a short microwave treatment time.