TWI598295B - Graphene nanoribbon composite and manufacturing method thereof - Google Patents
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本發明涉及一種石墨烯奈米帶複合材料及其製造方法，特別是指一種具有極佳催化效果的石墨烯奈米帶複合材料及其製造方法。 The invention relates to a graphene nanobelt composite material and a manufacturing method thereof, in particular to a graphene nanobelt composite material with excellent catalytic effect and a manufacturing method thereof.
“對硝基苯酚(4-nitrophenol)”唯一嚴重之致癌物質，常殘留在工業的廢水中，因為其持續性的毒性，目前被美國環保署(U.S.EPA)列為潛在的致癌物，且會汙染環境及生態。為了處理“對硝基苯酚”這種有害的物質，利用觸媒(催化劑)將“對硝基苯酚”加速化學氧化還原成“對氨基苯酚(4-aminophenol)”為一種較有效的處理方法，傳統常用的觸媒為白金(Pt)。然而，因為白金(Pt)的數量稀少且非常昂貴，所以本領域研究者想降低其用量又想保有其極佳的催化效果，直至2004年發現一個新的物質-石墨烯，石墨烯是一種二維結構且以規律的六角形蜂巢晶格排列，其擁有良好的物理性質和化學性質。因此，目前常用石墨烯複合材料(石墨烯+白金奈米粒子)或石墨烯奈米帶複合材料(石墨烯奈米帶+白金奈米粒子)來取代白金(Pt)作為催化“對硝基苯酚”的觸媒(催化劑)。此外，有別於石墨烯的二維結構，由於石墨烯奈米帶為一維結構，所以石墨烯奈米帶複合材料除了可以保有石墨烯複合材之特性外，不同寬度的石墨烯奈米帶(石墨烯奈米帶便是觸媒之基材)還可產生不同的能隙，進而影響電子之間的傳遞，所以石墨烯奈米帶複合材料能產生比石墨烯複合材料更好的催化效果。然而，要製造出特定寬度的石墨烯奈米帶不易，且不是所有寬度的石墨烯奈米帶複合材料都具有極佳的催化效果。 “4-nitrophenol” is the only serious carcinogen that often remains in industrial wastewater because it is currently listed as a potential carcinogen by the US Environmental Protection Agency (USEPA) because of its persistent toxicity. Pollution of the environment and ecology. In order to treat the harmful substance "p-nitrophenol", it is a more effective treatment method to accelerate the chemical oxidation reduction of "p-nitrophenol" into "4-aminophenol" by using a catalyst (catalyst). The commonly used catalyst is platinum (Pt). However, because the amount of platinum (Pt) is scarce and very expensive, researchers in this field want to reduce its amount and want to maintain its excellent catalytic effect. Until 2004, a new substance, graphene, is a kind of graphene. Dimensional structure and arranged in a regular hexagonal honeycomb lattice, which has good physical and chemical properties. Therefore, currently used graphene composites (graphene + platinum nanoparticles) or graphene nanobelt composites (graphene nanobelts + platinum nanoparticles) to replace platinum (Pt) as a catalyst for "p-nitrophenol" Catalyst (catalyst). In addition, unlike the two-dimensional structure of graphene, since the graphene nanobelt is a one-dimensional structure, the graphene nanobelt composite material can retain the graphene nanobelt of different widths in addition to the characteristics of the graphene composite material. (The graphene nanobelt is the substrate of the catalyst) can also produce different energy gaps, which in turn affect the transfer between electrons, so the graphene nanobelt composite can produce better catalytic effect than the graphene composite. . However, it is not easy to produce graphene nanoribbons of a specific width, and not all widths of graphene nanobelt composites have excellent catalytic effects.
因此，如何在製造出催化效果最佳的石墨烯奈米帶複合材料，便是本領域具有通常知識者值得去思量地。 Therefore, how to produce a graphene nanobelt composite with the best catalytic effect is worthy of consideration in the field.
本發明之目的在於提供一石墨烯奈米帶複合材料之製造方法，該方法所製造出的石墨烯奈米帶複合材料針對“對硝基苯酚”具有最佳的催化效果。 It is an object of the present invention to provide a method for producing a graphene nanobelt composite material, which produces a graphene nanobelt composite material having an optimum catalytic effect against "p-nitrophenol".
本發明提供一種石墨烯奈米帶複合材料之製造方法，該製造方法包括下列步驟：A.將多個奈米碳管分散至一第一溶液中，得到一混合液。B.將一濃硫酸與一嵌入分子加入混合液中，且等待一第一反應時間以產生一第一反應液。C.將氧化劑加入該第一反應液中，且等待一第二反應時間以產生一第二反應液。D.將該第二反應液加熱到一第一溫度，且維持該第一溫度的狀態至少一第三反應時間，以形成一第三反應液。E.該第三反應液加入一第一還原劑終止內部反應，且該第三反應液再經過一離心機處理取得固態狀的石墨烯奈米帶。F.將一白金奈米粒子前驅物與該石墨烯奈米帶分散至一第二溶液中，以形成該第四反應液。G.將一第二還原劑加入該第四反應溶液，且等待一第四反應時間以產生一第五反應液。H.將該第五反應液加熱到一第二溫度，且維持該第二溫度的狀態至少一第五反應時間，以形成一第六反應液。I.該離心機對該第六反應液進行離心處理。在C步驟中，該多個奈米碳管、該嵌入分子、及該氧化劑三者的重量比為1：40：15。 The invention provides a method for manufacturing a graphene nanobelt composite material, which comprises the following steps: A. Dispersing a plurality of carbon nanotubes into a first solution to obtain a mixed solution. B. A concentrated sulfuric acid and an intercalating molecule are added to the mixture, and a first reaction time is waited for to produce a first reaction liquid. C. Adding an oxidizing agent to the first reaction liquid and waiting for a second reaction time to produce a second reaction liquid. D. heating the second reaction liquid to a first temperature and maintaining the state of the first temperature for at least a third reaction time to form a third reaction liquid. E. The third reaction solution is added with a first reducing agent to terminate the internal reaction, and the third reaction solution is further processed by a centrifuge to obtain a solid graphene nanobelt. F. Dispersing a platinum nanoparticle precursor and the graphene nanobelt into a second solution to form the fourth reaction solution. G. Adding a second reducing agent to the fourth reaction solution and waiting for a fourth reaction time to produce a fifth reaction liquid. H. heating the fifth reaction liquid to a second temperature, and maintaining the state of the second temperature for at least a fifth reaction time to form a sixth reaction liquid. I. The centrifuge centrifuges the sixth reaction solution. In the C step, the weight ratio of the plurality of carbon nanotubes, the intercalating molecule, and the oxidizing agent is 1:40:15.
在上所述之石墨烯奈米帶複合材料之製造方法，其中該石墨烯奈米帶的寬度為20nm至60nm。 In the above method for producing a graphene nanobelt composite material, the graphene nanobelt has a width of 20 nm to 60 nm.
在上所述之石墨烯奈米帶複合材料之製造方法，在D步驟中，該第三反應液內的該奈米碳管裂解形成石墨烯奈米帶。 In the method for producing a graphene nanobelt composite material as described above, in the step D, the carbon nanotubes in the third reaction liquid are cracked to form a graphene nanobelt.
在上所述之石墨烯奈米帶複合材料之製造方法，其中該奈米碳管為雙壁奈米碳管，且該奈米碳管的管徑為10nm至20nm。 In the above method for producing a graphene nanobelt composite material, the carbon nanotube is a double-walled carbon nanotube, and the carbon nanotube has a diameter of 10 nm to 20 nm.
在上所述之石墨烯奈米帶複合材料之製造方法，其中該嵌入分子為硝酸鉀，該氧化劑為過錳酸鉀、氯酸鈉或高氯酸鉀。 In the above method for producing a graphene nanobelt composite material, wherein the intercalation molecule is potassium nitrate, and the oxidizing agent is potassium permanganate, sodium chlorate or potassium perchlorate.
在上所述之石墨烯奈米帶複合材料之製造方法，其中該第一反應時間、第二反應時間及第三反應時間皆為2小時，該第四反應時間為1小時，第五反應時間為6小時。 In the above method for producing a graphene nanobelt composite material, wherein the first reaction time, the second reaction time, and the third reaction time are both 2 hours, and the fourth reaction time is 1 hour, and the fifth reaction time is It is 6 hours.
在上所述之石墨烯奈米帶複合材料之製造方法，其中該第一溫度為70℃，該第二溫度為120℃。 In the above method for producing a graphene nanobelt composite material, the first temperature is 70 ° C and the second temperature is 120 ° C.
在上所述之石墨烯奈米帶複合材料之製造方法，其中該第一還原劑為過氧化氫，該第二還原劑為乙二醇。 In the above method for producing a graphene nanobelt composite material, the first reducing agent is hydrogen peroxide, and the second reducing agent is ethylene glycol.
為讓本之上述特徵和優點能更明顯易懂，下文特舉較佳實施例，並配合所附圖式，作詳細說明如下。 The above described features and advantages will be more apparent from the following description.
本發明提供一種石墨烯奈米帶複合材料，藉包含以下步驟之方法所製得：A.將多個奈米碳管分散至一第一溶液中，得到一混合液；B.將一濃硫酸與一嵌入分子加入該混合液中，且等待一第一反應時間以產生一第一反應液；C.將氧化劑加入該第一反應液中，且等待一第二反應時間以產生一第二反應液；D.將該第二反應液加熱到一第一溫度，且維持該第一溫度的狀態至少一第三反應時間，以形成一第三反應液；E.該第三反應液加入一第一還原劑終止內部反應，且該第三反應液再經過一離心機處理取得固態狀的石墨烯奈米帶；F.將一白金奈米粒子前驅物與該石墨烯奈米帶分散至一第二溶液中，以形成該第四反應液；G.將一第二還原劑加入該第四反應溶液，且等待一第四反應時間以產生一第五反應液；H.將該第五反應液加熱到一第二溫度，且維持該第二溫度的狀態至少一第五反應時間，以形成一第六反應液；I.該離心機對該第六反應液進行離心處 理；在C步驟中，該多個奈米碳管、該嵌入分子、及該氧化劑三者的重量比為1：40：15。 The invention provides a graphene nanobelt composite material, which is obtained by the method comprising the following steps: A. dispersing a plurality of carbon nanotubes into a first solution to obtain a mixed solution; B. using a concentrated sulfuric acid Adding to the mixed solution with an intercalating molecule, and waiting for a first reaction time to generate a first reaction liquid; C. adding an oxidizing agent to the first reaction liquid, and waiting for a second reaction time to generate a second reaction Liquid D; heating the second reaction liquid to a first temperature, and maintaining the first temperature state for at least a third reaction time to form a third reaction liquid; E. the third reaction liquid is added to the first a reducing agent terminates the internal reaction, and the third reaction liquid is further processed by a centrifuge to obtain a solid graphene nanobelt; F. dispersing a platinum nanoparticle precursor and the graphene nanobelt to a first a second solution to form the fourth reaction solution; G. a second reducing agent is added to the fourth reaction solution, and wait for a fourth reaction time to produce a fifth reaction solution; H. the fifth reaction solution Heating to a second temperature and maintaining the second temperature At least a fifth reaction time to form a sixth reaction solution; I. the centrifuge centrifuges the sixth reaction solution In the step C, the weight ratio of the plurality of carbon nanotubes, the embedded molecule, and the oxidant is 1:40:15.
在上所述之石墨烯奈米帶複合材料，其中石墨烯奈米帶的寬度為20nm至60nm。 The graphene nanobelt composite material described above, wherein the graphene nanobelt has a width of 20 nm to 60 nm.
10‧‧‧石墨烯奈米帶複合材料之製造方法 10‧‧‧Method for manufacturing graphene nanobelt composite material
S1~S9‧‧‧步驟 S1~S9‧‧‧Steps
圖1所繪示為本實施例之石墨烯奈米帶複合材料之製造方法10的流程圖。 FIG. 1 is a flow chart showing a method 10 of manufacturing a graphene nanobelt composite material of the present embodiment.
圖2所繪示為嵌入分子、氧化劑的添加比例與石墨烯奈米帶的生產率的對照圖表。 2 is a comparison chart showing the ratio of the addition of the embedding molecule and the oxidant to the productivity of the graphene nanobelt.
圖3所繪示為不同的石墨烯奈米帶複合材料的寬度所產生的催化效果的對照圖表。 Figure 3 is a graphical representation of the catalytic effect produced by the width of different graphene nanoribbon composites.
請參閱圖1，圖1所繪示為本實施例之石墨烯奈米帶複合材料之製造方法10的流程圖。石墨烯奈米帶複合材料之製造方法10包括下列步驟：首先，請參閱步驟S1，先將多個奈米碳管分散至一第一溶液中，得到一混合液。其中，選用之奈米碳管的管徑為10nm至20nm，該奈米碳管的種類為雙壁奈米碳管，而第一溶液例如為實驗室使用的去離子水。之後，請參閱步驟S2，將一濃硫酸與一嵌入分子加入混合液中，且等待一第一反應時間以產生一第一反應液。詳細來說，將10ml的濃硫酸(H2SO4)和嵌入分子(嵌入分子例如為硝酸鉀(KNO3))在該混和液中攪拌，且等待的第一反應時間約為2小時，步驟S2是為了使該奈米碳管之間的鍵結力、結合力或是吸引力減少。之後，請參閱步驟S3，將氧化劑加入該第一反應液中，且等待一第二反應時間以產生一第二反應液。其中，氧化劑例如為過錳酸鉀、氯酸鈉或高氯酸鉀，而第二反應時間為2小時。並且，在該第二反應液裡，該多個奈米碳管、該嵌入分子(硝酸鉀)、及該氧化劑(過錳酸鉀)三者的重 量比為1：40：15。舉例來說，所有的奈米碳管的重量例如為0.1克，硝酸鉀的重量例如為4克，而過錳酸鉀為1.5克。之後，請參閱步驟S4，將該第二反應液加熱到一第一溫度，且維持該第一溫度的狀態至少一第三反應時間，以形成一第三反應液。其中，第一溫度例如為70℃，而第三反應時間同樣為2小時。並且，該第二反應液升高至第一溫度(70℃)後，有效增快該氧化劑(過錳酸鉀)與該奈米碳管之間的氧化還原反應，所以加熱後的該第三反應液內的該奈米碳管會裂解形成石墨烯奈米帶(此時的石墨烯奈米帶還未被萃取出，還在該第三反應液內)。之後，請參閱步驟S5，該第三反應液會再加入一第一還原劑，以終止內部反應。詳細來說，第一還原劑例如為過氧化氫(H2O2)，該第一還原劑(H2O2)能中和未反應的過錳酸根離子(MnO4 -)以及避免氧化錳(MnO2)沉澱。此外。使用一離心機以2萬4千5百轉的轉速轉動該第三反應液，便能在該第三反應液萃取出固態狀的石墨烯奈米帶。值得注意的是，該石墨烯奈米帶的寬度是落在20nm至60nm之間。之後，請參閱步驟S6，將一白金奈米粒子前驅物與該固態狀的石墨烯奈米帶分散至一第二溶液中，以形成該第四反應液。其中，該白金奈米粒子前驅物例如為六氯鉑酸(H2PtCl6．(H2O)6)，而該第二溶液同樣為實驗室使用的去離子水。之後，請參閱步驟S7，將一第二還原劑加入該第四反應溶液，且等待一第四反應時間以產生一第五反應液。其中，該第二還原劑例如為乙二醇(C2H4(OH)2)，該第二還原劑主要將該白金奈米粒子前驅物還原成白金奈米粒子。此外，該第四反應時間例如為1小時。之後，請參閱步驟S8，將該第五反應液加熱到一第二溫度，且維持該第二溫度的狀態至少一第五反應時間，以形成一第六反應液。其中，該第二溫度為120℃，該第五反應時間為6小時。詳細來說，當該第五反應液被加熱到120℃並持續6小時之後，該第五反應液內的該白金奈米粒子會附載在該石墨烯奈米帶形成一石墨烯奈米帶複合材料。之後，請參閱步驟S9，該離心機對該第六反應液進行離心處理。具體來說，使用該離心機以2萬4千5百轉的 轉速轉動該第六反應液，便能在該第六反應液萃取出固態狀的石墨烯奈米帶複合材料(石墨烯奈米帶+白金奈米粒子)。值得注意的是，由於該石墨烯奈米帶(觸媒基材)的寬度是在20nm至60nm之間，所以該固態狀的石墨烯奈米帶複合材料的寬度也是落在20nm至60nm之間。 Please refer to FIG. 1. FIG. 1 is a flow chart showing a method 10 for manufacturing a graphene nanobelt composite material according to the present embodiment. The manufacturing method 10 of the graphene nanobelt composite material comprises the following steps: First, referring to step S1, a plurality of carbon nanotubes are first dispersed into a first solution to obtain a mixed solution. Wherein, the diameter of the selected carbon nanotube is 10 nm to 20 nm, the type of the carbon nanotube is a double-walled carbon nanotube, and the first solution is, for example, deionized water used in the laboratory. Thereafter, referring to step S2, a concentrated sulfuric acid and an intercalating molecule are added to the mixed solution, and a first reaction time is waited for to generate a first reaction liquid. In detail, 10 ml of concentrated sulfuric acid (H 2 SO 4 ) and an intercalating molecule (embedded molecule such as potassium nitrate (KNO 3 )) are stirred in the mixture, and the waiting first reaction time is about 2 hours. S2 is for reducing the bonding force, bonding force or attraction between the carbon nanotubes. Thereafter, referring to step S3, an oxidizing agent is added to the first reaction liquid, and a second reaction time is waited for to generate a second reaction liquid. Among them, the oxidizing agent is, for example, potassium permanganate, sodium chlorate or potassium perchlorate, and the second reaction time is 2 hours. Further, in the second reaction liquid, the weight ratio of the plurality of carbon nanotubes, the intercalation molecule (potassium nitrate), and the oxidizing agent (potassium permanganate) is 1:40:15. For example, all carbon nanotubes have a weight of, for example, 0.1 gram, potassium nitrate has a weight of, for example, 4 grams, and potassium permanganate has a weight of 1.5 grams. Thereafter, referring to step S4, the second reaction liquid is heated to a first temperature, and the state of the first temperature is maintained for at least a third reaction time to form a third reaction liquid. Among them, the first temperature is, for example, 70 ° C, and the third reaction time is also 2 hours. Moreover, after the second reaction liquid is raised to the first temperature (70 ° C), the redox reaction between the oxidant (potassium permanganate) and the carbon nanotube tube is effectively increased, so the third after heating The carbon nanotubes in the reaction solution are cleaved to form a graphene nanobelt (the graphene nanobelt at this time has not been extracted and is still in the third reaction solution). Thereafter, referring to step S5, the third reaction liquid is further added with a first reducing agent to terminate the internal reaction. In detail, a first reducing agent such as hydrogen peroxide (H 2 O 2), the first reducing agent (H 2 O 2) and capable of permanganate ion (MnO 4 -) and to avoid excessive unreacted manganese oxide (MnO 2 ) precipitated. Also. By rotating the third reaction liquid at a rotation speed of 24,500 revolutions using a centrifuge, a solid graphene nanobelt tape can be extracted in the third reaction liquid. It is worth noting that the width of the graphene nanobelt falls between 20 nm and 60 nm. Thereafter, referring to step S6, a platinum nanoparticle precursor and the solid graphene nanobelt are dispersed into a second solution to form the fourth reaction solution. Wherein, the platinum nanoparticle precursor is, for example, hexachloroplatinic acid (H 2 PtCl 6 .(H 2 O) 6 ), and the second solution is also deionized water used in the laboratory. Thereafter, referring to step S7, a second reducing agent is added to the fourth reaction solution, and a fourth reaction time is waited for to generate a fifth reaction liquid. The second reducing agent is, for example, ethylene glycol (C 2 H 4 (OH) 2 ), and the second reducing agent mainly reduces the platinum nanoparticle precursor to white gold nanoparticles. Further, the fourth reaction time is, for example, 1 hour. Thereafter, referring to step S8, the fifth reaction liquid is heated to a second temperature, and the state of the second temperature is maintained for at least a fifth reaction time to form a sixth reaction liquid. Wherein the second temperature is 120 ° C and the fifth reaction time is 6 hours. In detail, when the fifth reaction liquid is heated to 120 ° C for 6 hours, the platinum nanoparticles in the fifth reaction liquid are carried on the graphene nanobelt to form a graphene nanobelt composite. material. Thereafter, referring to step S9, the centrifuge centrifuges the sixth reaction solution. Specifically, by using the centrifuge to rotate the sixth reaction liquid at a rotation speed of 24,500 revolutions, a solid graphene nanobelt composite material (graphene nanometer) can be extracted in the sixth reaction liquid. With + white gold nanoparticles). It is worth noting that since the width of the graphene nanobelt (catalyst substrate) is between 20 nm and 60 nm, the width of the solid graphene nanobelt composite also falls between 20 nm and 60 nm. .
在上述的步驟S2中，嵌入分子(硝酸鉀)主要目的是為了減少濃硫酸(H2SO4)的使用劑量。具體來說，通常需添100ml的濃硫酸(H2SO4)到該第一反應液內才能穩定該石墨烯奈米帶的生產率。然而，在該步驟S2中，添加該嵌入分子(硝酸鉀)後，只需使用10ml的濃硫酸(H2SO4)便能有效提升該石墨烯奈米帶的產率。 In the above step S2, the main purpose of the intercalating molecule (potassium nitrate) is to reduce the dose of concentrated sulfuric acid (H 2 SO 4 ). Specifically, it is usually necessary to add 100 ml of concentrated sulfuric acid (H 2 SO 4 ) to the first reaction liquid in order to stabilize the productivity of the graphene nanobelt. However, in this step S2, after the embedding molecule (potassium nitrate) is added, it is only necessary to use 10 ml of concentrated sulfuric acid (H 2 SO 4 ) to effectively increase the yield of the graphene nanobelt.
此外，申請人分別使用三組不同嵌入分子、氧化劑的添加比例去生產該石墨烯奈米帶，最終結果整理如圖2的對照圖表(圖2所繪示為嵌入分子、氧化劑的添加比例與石墨烯奈米帶的生產率的對照圖表)，經由圖2的對照圖表能得知，A1、B1及C1三組所產生的該石墨烯奈米帶的寬度皆是落在20nm至60nm之間。但是，只有該多個奈米碳管、該嵌入分子(硝酸鉀)、及該氧化劑(過錳酸鉀)三者的重量比為1：40：15時，寬度為20nm至60nm之間的石墨烯奈米帶的生產率才會到達100%。如此一來，只有C1組的石墨烯奈米帶才適合作為觸媒的基材，而C1組的石墨烯奈米帶即是上述步驟S5中所萃取出的石墨烯奈米帶。 In addition, the applicant used three sets of different embedding molecules and oxidant addition ratios to produce the graphene nanobelt, and the final result is the comparison chart as shown in Fig. 2 (Fig. 2 shows the ratio of the embedded molecule and the oxidant added to the graphite). According to the comparison chart of the productivity of the olefin band, it can be seen from the comparison chart of FIG. 2 that the width of the graphene nanobelt produced by the three groups A1, B1 and C1 falls between 20 nm and 60 nm. However, only when the weight ratio of the plurality of carbon nanotubes, the intercalating molecule (potassium nitrate), and the oxidizing agent (potassium permanganate) is 1:40:15, the graphite having a width of between 20 nm and 60 nm The productivity of the olefin band will reach 100%. In this way, only the graphene nanobelt of the C1 group is suitable as a substrate for the catalyst, and the graphene nanobelt of the C1 group is the graphene nanobelt extracted in the above step S5.
接著，申請人分別使用三組不同寬度的石墨烯奈米帶複合材料對該“對硝基苯酚”進行催化，並測得該“對硝基苯酚”還原成“對氨基苯酚”的反應速率，其最終結果整理如圖3的對照圖表(圖3所繪示為不同的石墨烯奈米帶複合材料的寬度所產生的催化效果的對照圖表)，經由圖3的對照圖表能得知，X、Y及Z三組所產生的該石墨烯奈米帶的產率皆為100%。然而，相較於80nm-100nm寬度及5nm-10nm寬度的石墨烯奈米帶複合材料，寬度為20nm至60nm之間的石墨烯奈米帶複合材料具有極佳的反應速率(Kn)，Y組的反應速率(Kn)幾乎是X組的7倍之多，而Y組的石墨烯奈米帶複合材料即是上述步驟S9所萃取出的石墨烯奈米 帶複合材料(石墨烯奈米帶+白金奈米粒子)。因此，Y組的反應速率(1035.5±57.7×10-3mol/sec．g)已證實本時施例石墨烯奈米帶複合材料之製造方法10所製造出來的石墨烯奈米帶複合材料，對於效轉化對硝基苯酚(4-nitrophenol)為對氨基苯酚(4-aminophenol)具有最佳的反應速率。這樣一來，便能降低硝基苯酚(4-nitrophenol)對人體及環境的危害。 Next, the applicant catalyzed the "p-nitrophenol" using three sets of graphene nanobelts with different widths, and measured the reaction rate of the "p-nitrophenol" to "p-aminophenol". The final result is summarized in the comparison chart of FIG. 3 (the comparison chart of the catalytic effect produced by the width of different graphene nanobelt composites shown in FIG. 3), and it can be known from the comparison chart of FIG. 3 that X, The yield of the graphene nanobelt produced by the Y and Z groups was 100%. However, graphene nanoribbon composites with a width between 20 nm and 60 nm have excellent reaction rates (Kn) compared to graphene nanoribbon composites with widths of 80 nm to 100 nm and widths of 5 nm to 10 nm, Y group. The reaction rate (Kn) is almost 7 times that of the X group, and the graphene nanoribbon composite of the Y group is the graphene nanobelt composite material extracted by the above step S9 (graphene nanoribbon + White gold nanoparticles). Therefore, the reaction rate of the Y group (1035.5±57.7×10 -3 mol/sec.g) has confirmed the graphene nanobelt composite material produced by the method 10 of the present invention for the graphene nanobelt composite material, For the effect of conversion of p-nitrophenol (4-nitrophenol) is the best reaction rate for 4-aminophenol. In this way, the harm of 4-nitrophenol to the human body and the environment can be reduced.
雖然本發明已以較佳實施例揭露如上，然其並非用以限定本發明，任何所屬技術領域中具有通常知識者，在不脫離本發明之精神和範圍內，當可作些許之更動與潤飾，因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。 Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.
10‧‧‧石墨烯奈米帶複合材料之製造方法 10‧‧‧Method for manufacturing graphene nanobelt composite material
S1~S9‧‧‧步驟 S1~S9‧‧‧Steps
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