CN108404948B - One kind (BiO)2CO3-BiO2-xComposite photocatalyst and preparation method and application thereof - Google Patents
One kind (BiO)2CO3-BiO2-xComposite photocatalyst and preparation method and application thereof Download PDFInfo
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Abstract
本发明公开了一种(BiO)2CO3‑BiO2‑x纳米光催化剂的制备方法，属于光催化的技术领域，其是将NaBiO3·2H2O和一定量的g‑C3N4溶于去离子水中，并搅拌30min，然后加入NaOH溶液搅30min，在180～200℃进行水热反应4～10h，反应结束后，冷却，滤出沉淀物，沉淀物分别用去离子水和乙醇清洗，烘干，即得到(BiO)2CO3‑BiO2‑x，通过本发明的方法制备的(BiO)2CO3‑BiO2‑x纳米光催化剂，其复合BiO2‑x提高了(BiO)2CO3对可见光的吸收，并且抑制了光生电子和空穴在(BiO)2CO3的复合，从而提高了(BiO)2CO3的可见光催化性能，特别是对双酚A的降解率高于70％以上，对苯酚的降解率达到50％以上。
The invention discloses a preparation method of a (BiO) 2 CO 3 -BiO 2 -x nanometer photocatalyst, which belongs to the technical field of photocatalysis . Dissolve in deionized water, and stir for 30min, then add NaOH solution and stir for 30min, conduct hydrothermal reaction at 180～200℃ for 4～10h, after the reaction, cool, filter out the precipitate, use deionized water and ethanol for the precipitate respectively Cleaning, drying, namely obtains (BiO) 2 CO 3 -BiO 2-x , the (BiO) 2 CO 3 -BiO 2-x nano-photocatalyst prepared by the method of the present invention, its composite BiO 2-x improves ( BiO) 2 CO 3 absorbs visible light and inhibits the recombination of photogenerated electrons and holes in (BiO) 2 CO 3 , thereby improving the visible light catalytic performance of (BiO) 2 CO 3 , especially for the degradation of bisphenol A The rate of degradation is higher than 70%, and the degradation rate of phenol is over 50%.
Description
技术领域technical field
本发明属于光催化的技术领域，特别涉及一种(BiO)2CO3-BiO2-x复合光催化剂及其制备方法和应用。The invention belongs to the technical field of photocatalysis, and particularly relates to a (BiO) 2 CO 3 -BiO 2-x composite photocatalyst and a preparation method and application thereof.
背景技术Background technique
随着近年来水污染问题越来越得到关注，污水处理成为目前主要的研究对象。其中，光催化技术由于具有材料无毒性、强氧化性和还原性、产物无二次污染、能够利用太阳能等特点，成为处理水污染的有效手段之一。目前，在光催化材料中，TiO2因无毒、具有较强的强化能力和稳定的化学性质，成为世界上最当红的光催化材料。由于TiO2只有受到紫外光照射时才能形成电子和空穴对，且由于其禁带宽度较窄，电子和空穴很容易再次复合，使其光催化活性降低，阻碍TiO2光催化材料的实际应用。因此，开发新型的光催化材料成为主要的研究方向。在开发的新的光催化材料的过程中，半导体材料因为具有独特的光催化性质，受到了研究者广泛的关注。With the increasing attention of water pollution in recent years, sewage treatment has become the main research object at present. Among them, photocatalytic technology has become one of the effective means to deal with water pollution due to its non-toxicity, strong oxidative and reducible properties, no secondary pollution of products, and the ability to utilize solar energy. At present, among photocatalytic materials, TiO 2 has become the most popular photocatalytic material in the world due to its non-toxicity, strong strengthening ability and stable chemical properties. Since TiO2 can only form electron and hole pairs when irradiated by ultraviolet light, and due to its narrow band gap, electrons and holes are easily recombined, which reduces its photocatalytic activity and hinders the practical application of TiO2 photocatalytic materials. application. Therefore, the development of new photocatalytic materials has become the main research direction. In the process of developing new photocatalytic materials, semiconductor materials have received extensive attention from researchers because of their unique photocatalytic properties.
在对于半导体光催化材料的研究中，铋系半导体光催化材料因具有独特的电子结构，优良的光吸收能力和较高的光催化性能，从而得到广泛的研究和开发。其中，(BiO)2CO3的应用最为广泛。专利公开号为CN103084195B的中国专利文献公开了一种(BiO)2CO3纳米片光催化剂的制备方法，该方法首先将铋源溶解在酸溶液中，加入氨水至反应液呈碱性；然后向得到的反应混合物中通入CO2气体，反应后得到纳米片状(BiO)2CO3。但是该方法制备的(BiO)2CO3不能吸收可见光，仅在紫外光照射下才具有光催化活性。专利公开号为CN102671683B中国专利文献公开了一种纳米片自组装C掺杂(BiO)2CO3微球可见光催化剂的制备方法。该方法制备的C掺杂(BiO)2CO3微球在可见光照射下具有一定的光催化活性。但是相比于纯(BiO)2CO3，C掺杂(BiO)2CO3微球对NO的去除率仅为42.5％。上述两种方法制备的(BiO)2CO3和C掺杂(BiO)2CO3对可见光吸收率低，并且材料表面的光生空穴与光生电子极易复合，使得(BiO)2CO3和C掺杂(BiO)2CO3的光催化活性较低，使用受限。In the research on semiconductor photocatalytic materials, bismuth-based semiconductor photocatalytic materials have been widely researched and developed because of their unique electronic structure, excellent light absorption ability and high photocatalytic performance. Among them, (BiO) 2 CO 3 is the most widely used. The Chinese patent document with the patent publication number CN103084195B discloses a preparation method of a (BiO) 2 CO 3 nanosheet photocatalyst. The method first dissolves a bismuth source in an acid solution, adds ammonia water until the reaction solution is alkaline; CO 2 gas is introduced into the obtained reaction mixture, and after the reaction, nano-flaky (BiO) 2 CO 3 is obtained. However, (BiO) 2 CO 3 prepared by this method cannot absorb visible light and has photocatalytic activity only under ultraviolet light irradiation. Patent publication number CN102671683B Chinese patent document discloses a preparation method of nanosheet self-assembled C-doped (BiO) 2 CO 3 microsphere visible light catalyst. The C-doped (BiO) 2 CO 3 microspheres prepared by this method have certain photocatalytic activity under visible light irradiation. But compared with pure (BiO) 2 CO 3 , the NO removal rate of C-doped (BiO) 2 CO 3 microspheres is only 42.5%. (BiO) 2 CO 3 and C-doped (BiO) 2 CO 3 prepared by the above two methods have low visible light absorption rate, and the photo-generated holes and photo-generated electrons on the surface of the material are very easy to recombine, so that (BiO) 2 CO 3 and C-doped (BiO) 2 CO 3 has low photocatalytic activity and limited use.
发明内容SUMMARY OF THE INVENTION
为了克服现有技术的(BiO)2CO3在可见光条件下光催化活性较低的问题，提供了一种对可见光吸收强、光催化性能高的(BiO)2CO3-BiO2-x复合光催化剂。同时还提供了该(BiO)2CO3-BiO2-x复合光催化剂的制备方法和应用。In order to overcome the problem of low photocatalytic activity of (BiO) 2 CO 3 in the prior art under visible light conditions, a (BiO) 2 CO 3 -BiO 2-x composite with strong visible light absorption and high photocatalytic performance is provided. catalyst of light. At the same time, a preparation method and application of the (BiO) 2 CO 3 -BiO 2-x composite photocatalyst are also provided.
本发明所采用的技术方案是：The technical scheme adopted in the present invention is:
一种(BiO)2CO3-BiO2-x复合光催化剂，该催化剂为自组装而成的纳米花BiO2-x和纳米片状(BiO)2CO3组成的复合材料，其中x＝0.15～0.6，(BiO)2CO3纳米片的厚度为200～250nm，BiO2-x纳米花的粒径为100～500nm。A (BiO) 2 CO 3 -BiO 2-x composite photocatalyst, the catalyst is a composite material composed of self-assembled nano-flower BiO 2-x and nano-sheet (BiO) 2 CO 3 , wherein x=0.15 ~0.6, the thickness of (BiO) 2 CO 3 nanosheets is 200-250 nm, and the particle size of BiO 2-x nanoflowers is 100-500 nm.
进一步限定，所述(BiO)2CO3-BiO2-x复合光催化剂的比表面积为9～15m2/g。Further limited, the specific surface area of the (BiO) 2 CO 3 -BiO 2-x composite photocatalyst is 9-15 m 2 /g.
上述的(BiO)2CO3-BiO2-x复合光催化剂的制备方法，其包括以下步骤：The preparation method of the above-mentioned (BiO) 2 CO 3 -BiO 2-x composite photocatalyst, which comprises the following steps:
将NaBiO3·2H2O和g-C3N4溶于去离子水中，搅拌，加入NaOH溶液，混匀，所得混合液转移到高压水热釜，在100～200℃进行水热反应，反应时间为4～10h，水热反应结束后，冷却，滤出沉淀物，将沉淀物用去离子水和乙醇清洗，烘干，即得到(BiO)2CO3-BiO2-x复合光催化剂。Dissolve NaBiO 3 ·2H 2 O and gC 3 N 4 in deionized water, stir, add NaOH solution, mix well, transfer the obtained mixed solution to a high-pressure hydrothermal kettle, and conduct a hydrothermal reaction at 100-200 ° C. The reaction time is: 4-10h, after the hydrothermal reaction is completed, cool, filter out the precipitate, wash the precipitate with deionized water and ethanol, and dry to obtain (BiO) 2 CO 3 -BiO 2-x composite photocatalyst.
进一步限定，所述NaBiO3·2H2O和g-C3N4的质量比为2.8:1～4.2：1。Further limited, the mass ratio of the NaBiO 3 ·2H 2 O to gC 3 N 4 is 2.8:1˜4.2:1.
进一步限定，所述NaBiO3·2H2O和g-C3N4的质量比为3.4：1。Further defined, the mass ratio of the NaBiO 3 ·2H 2 O and gC 3 N 4 is 3.4:1.
上述的(BiO)2CO3-BiO2-x复合光催化剂用于降解双酚A和苯酚。The above-mentioned (BiO) 2 CO 3 -BiO 2-x composite photocatalyst was used to degrade bisphenol A and phenol.
上述的(BiO)2CO3-BiO2-x复合光催化剂用于降解双酚A和苯酚的具体方法是：在室温条件下，向双酚A或者苯酚溶液中加入(BiO)2CO3-BiO2-x复合光催化剂，可见光光源下照射30～120min。The specific method that the above-mentioned (BiO) 2 CO 3 -BiO 2-x composite photocatalyst is used for degrading bisphenol A and phenol is: at room temperature, adding (BiO) 2 CO 3 - BiO 2-x composite photocatalyst, irradiated under visible light source for 30-120min.
本发明的(BiO)2CO3-BiO2-x复合光催化剂通过水热法合成，充分利用了BiO2-x禁带宽度为1.46eV，其对见光和近红外光具有较强的吸收性能，提高了 (BiO)2CO3-BiO2-x复合材料的可见光吸收特性，增强其可见光催化性能。同时，纳米花状BiO2-x增加了(BiO)2CO3-BiO2-x复合材料的比表面积，有利于 (BiO)2CO3-BiO2-x复合材料对污染物的吸附和增加了催化活性反应点位置，从而提高了其光催化性能，特别是对双酚A和苯酚难降解有机物，降解率更明显。The (BiO) 2 CO 3 -BiO 2-x composite photocatalyst of the present invention is synthesized by a hydrothermal method, fully utilizes the forbidden band width of BiO 2-x of 1.46 eV, and has strong absorption for visible light and near-infrared light The visible light absorption properties of the (BiO) 2 CO 3 -BiO 2-x composite were improved, and its visible light catalytic performance was enhanced. Meanwhile, the nanoflower-like BiO 2-x increases the specific surface area of the (BiO) 2 CO 3 -BiO 2- x composite, which is beneficial to the adsorption and increase of pollutants by the (BiO) 2 CO 3 -BiO 2-x composite Therefore, the photocatalytic performance is improved, especially for the refractory organic compounds of bisphenol A and phenol, and the degradation rate is more obvious.
附图说明Description of drawings
图1为本发明实施例1﹑2和3制备的光催化剂的XRD图谱；Fig. 1 is the XRD patterns of the photocatalysts prepared in Examples 1, 2 and 3 of the present invention;
图2为本发明实施例1制备的光催化剂的SEM图像；Fig. 2 is the SEM image of the photocatalyst prepared in Example 1 of the present invention;
图3为本发明实施例1制备的光催化剂的UV-vis DRS图谱；Fig. 3 is the UV-vis DRS spectrum of the photocatalyst prepared in Example 1 of the present invention;
图4为本发明实施例2制备的光催化剂的SEM图像；Fig. 4 is the SEM image of the photocatalyst prepared in Example 2 of the present invention;
图5为本发明实施例3制备的光催化剂的SEM图像；Fig. 5 is the SEM image of the photocatalyst prepared in Example 3 of the present invention;
图6为本发明实施例1﹑2和3提供的光催化剂对双酚A的降解率曲线图。6 is a graph showing the degradation rate of bisphenol A by photocatalysts provided in Examples 1, 2 and 3 of the present invention.
图7为本发明实施例1﹑2和3提供的光催化剂对苯酚的降解率对照图。7 is a comparison diagram of the degradation rate of the photocatalysts provided in Examples 1, 2 and 3 of the present invention to phenol.
具体实施方式Detailed ways
现结合附图和实验对本发明的技术方案进行进一步说明。The technical solution of the present invention will now be further described with reference to the accompanying drawings and experiments.
实施例1Example 1
本实施例以NaBiO3·2H2O和g-C3N4为原料制备(BiO)2CO3-BiO2-x复合光催化剂的方法由下述步骤实现：The present embodiment uses NaBiO 3 ·2H 2 O and gC 3 N 4 as raw materials to prepare (BiO) 2 CO 3 -BiO 2-x composite photocatalyst by the following steps:
将1.68g NaBiO3·2H2O和0.6g g-C3N4(质量比为2.8:1)溶于40mL去离子水中，搅拌30分钟，加入NaOH溶液，混匀，所得混合液转移到高压水热釜，在180～200℃进行水热反应，反应时间为4～10h，水热反应结束后，冷却，滤出沉淀物，将沉淀物用去离子水和乙醇清洗，烘干，即得到(BiO)2CO3-BiO2-x复合光催化剂，x＝0.15～0.6，(简称(BiO)2CO3-BiO2-x-2.8)。Dissolve 1.68g NaBiO 3 ·2H 2 O and 0.6g gC 3 N 4 (mass ratio of 2.8:1) in 40 mL of deionized water, stir for 30 minutes, add NaOH solution, mix well, and transfer the resulting mixture to high-pressure hydrothermal The kettle, the hydrothermal reaction is carried out at 180～200 ℃, and the reaction time is 4～10h. After the hydrothermal reaction is completed, cooling is performed, and the precipitate is filtered out, and the precipitate is washed with deionized water and ethanol, and dried to obtain (BiO ) 2 CO 3 -BiO 2-x composite photocatalyst, x=0.15-0.6, (referred to as (BiO) 2 CO 3 -BiO 2-x -2.8).
本发明将得到的(BiO)2CO3-BiO2-x纳米光催化剂进行XRD分析，结果如图1 所示，图1为本发明实施例1提供的的(BiO)2CO3-BiO2-x纳米光催化剂的XRD图谱，由图1可以看出，本实施例1制备得到的光催化剂的物相为(BiO)2CO3和 BiO2-x。The present invention performs XRD analysis on the obtained (BiO) 2 CO 3 -BiO 2-x nanophotocatalyst, and the result is shown in FIG. 1 , which is (BiO) 2 CO 3 -BiO 2 provided in Example 1 of the present invention XRD patterns of -x nano-photocatalysts, it can be seen from Figure 1 that the phases of the photocatalysts prepared in Example 1 are (BiO) 2 CO 3 and BiO 2-x .
本发明将得到的(BiO)2CO3-BiO2-x光催化剂进行SEM分析，结果如图2所示，图2为本发明实施例1制备的(BiO)2CO3-BiO2-x光催化剂的SEM图像，由图2可以看出，本实施例制备的(BiO)2CO3-BiO2-x光催化剂为纳米片自组装而成的纳米花BiO2-x和纳米片状(BiO)2CO3组成，(BiO)2CO3纳米片的厚度约为 200～250nm，BiO2-x纳米花的粒径为100～500nm。In the present invention, the obtained (BiO) 2 CO 3 -BiO 2-x photocatalyst is subjected to SEM analysis, and the result is shown in FIG. 2 , which is the (BiO) 2 CO 3 -BiO 2-x prepared in Example 1 of the present invention The SEM image of the photocatalyst, it can be seen from Figure 2 that the (BiO) 2 CO 3 -BiO 2-x photocatalyst prepared in this example is a nano-flower BiO 2-x and a nano-sheet ( BiO) 2 CO 3 , the thickness of the (BiO) 2 CO 3 nanosheets is about 200-250 nm, and the particle size of the BiO 2-x nanoflowers is 100-500 nm.
本发明将得到的(BiO)2CO3-BiO2-x纳米光催化剂进行比表面积测试(Belsorp max全自动N2吸脱附仪)，可知(BiO)2CO3-BiO2-x复合光催化剂的比表面积为 9～15m2/g。In the present invention, the obtained (BiO) 2 CO 3 -BiO 2-x nanometer photocatalyst is tested for specific surface area (Belsorp max automatic N 2 adsorption and desorption instrument), and it is known that (BiO) 2 CO 3 -BiO 2-x composite light The specific surface area of the catalyst is 9 to 15 m 2 /g.
对得到的(BiO)2CO3-BiO2-x光催化剂进行UV-vis DRS分析，结果如图3所示，图3为本发明实施例1制备的(BiO)2CO3-BiO2-x光催化剂的UV-vis DRS图谱，结果表明，与纯(BiO)2CO3相比，由于BiO2-x复合的作用，本实施例制备的 (BiO)2CO3-BiO2-x对可见光有大幅吸收。The obtained (BiO) 2 CO 3 -BiO 2-x photocatalyst was subjected to UV-vis DRS analysis, and the results are shown in Figure 3, which is the (BiO) 2 CO 3 -BiO 2- prepared in Example 1 of the present invention X -ray UV-vis DRS spectrum of the photocatalyst, the results show that, compared with pure (BiO) 2 CO 3 , the (BiO) 2 CO 3 -BiO 2-x prepared in this example has a better Visible light is greatly absorbed.
实施例2Example 2
本实施例以NaBiO3·2H2O和g-C3N4为原料制备(BiO)2CO3-BiO2-x复合光催化剂的方法由下述步骤实现：The present embodiment uses NaBiO 3 ·2H 2 O and gC 3 N 4 as raw materials to prepare (BiO) 2 CO 3 -BiO 2-x composite photocatalyst by the following steps:
将1.68g NaBiO3·2H2O和0.49g g-C3N4(质量比为3.4:1)溶于40mL去离子水中，搅拌30分钟，加入NaOH溶液，混匀，所得混合液转移到高压水热釜，在100～150℃进行水热反应，反应时间为4～10h，水热反应结束后，冷却，滤出沉淀物，将沉淀物用去离子水和乙醇清洗，烘干，即得到(BiO)2CO3-BiO2-x复合光催化剂，x＝0.15～0.6，(简称(BiO)2CO3-BiO2-x-3.4)。Dissolve 1.68g NaBiO 3 ·2H 2 O and 0.49g gC 3 N 4 (mass ratio of 3.4:1) in 40 mL of deionized water, stir for 30 minutes, add NaOH solution, mix well, and transfer the obtained mixture to high-pressure hydrothermal kettle, hydrothermal reaction is carried out at 100～150 ℃, and the reaction time is 4～10h. After the hydrothermal reaction is completed, cooling is performed, and the precipitate is filtered out, and the precipitate is washed with deionized water and ethanol, and dried to obtain (BiO ) 2 CO 3 -BiO 2-x composite photocatalyst, x=0.15-0.6, (referred to as (BiO) 2 CO 3 -BiO 2-x -3.4).
本发明将得到的(BiO)2CO3-BiO2-x光催化剂进行SEM分析，结果如图4所示，图4为本发明实施例1制备的(BiO)2CO3-BiO2-x光催化剂的SEM图像，由图4可以看出，本实施例制备的(BiO)2CO3-BiO2-x光催化剂为纳米片自组装而成的纳米花BiO2-x和纳米片状(BiO)2CO3组成，(BiO)2CO3纳米片的厚度约为200～250nm， BiO2-x纳米花的粒径为100～500nm。In the present invention, the obtained (BiO) 2 CO 3 -BiO 2-x photocatalyst is subjected to SEM analysis, and the result is shown in FIG. 4 , which is the (BiO) 2 CO 3 -BiO 2-x prepared in Example 1 of the present invention The SEM image of the photocatalyst, it can be seen from Figure 4 that the (BiO) 2 CO 3 -BiO 2-x photocatalyst prepared in this example is a nano-flower BiO 2-x and a nano-sheet ( The thickness of the (BiO) 2 CO 3 nanosheets is about 200-250 nm, and the particle size of the BiO 2-x nanoflowers is 100-500 nm.
实施例3Example 3
将1.68g NaBiO3·2H2O和0.4g g-C3N4(质量比为4.2:1)溶于40mL去离子水中，搅拌30分钟，加入NaOH溶液，混匀，所得混合液转移到高压水热釜，在 100～200℃进行水热反应，反应时间为4～10h，水热反应结束后，冷却，滤出沉淀物，将沉淀物用去离子水和乙醇清洗，烘干，即得到(BiO)2CO3-BiO2-x复合光催化剂，x＝0.15～0.6，(简称(BiO)2CO3-BiO2-x-4.2)。Dissolve 1.68g NaBiO 3 ·2H 2 O and 0.4g gC 3 N 4 (mass ratio of 4.2:1) in 40 mL of deionized water, stir for 30 minutes, add NaOH solution, mix well, and transfer the resulting mixture to high-pressure hydrothermal kettle, perform hydrothermal reaction at 100～200 ℃, the reaction time is 4～10h, after the hydrothermal reaction is finished, cool, filter out the precipitate, wash the precipitate with deionized water and ethanol, and dry to obtain (BiO ) 2 CO 3 -BiO 2-x composite photocatalyst, x=0.15-0.6, (referred to as (BiO) 2 CO 3 -BiO 2-x -4.2).
本发明将得到的(BiO)2CO3-BiO2-x光催化剂进行SEM分析，结果如图5所示，图5为本发明实施例1制备的(BiO)2CO3-BiO2-x光催化剂的SEM图像，由图 5可以看出，本实施例制备的(BiO)2CO3-BiO2-x光催化剂为纳米片自组装而成的纳米花BiO2-x和纳米片状(BiO)2CO3组成，(BiO)2CO3纳米片的厚度约为 200～250nm，BiO2-x纳米花的粒径为100～500nm。In the present invention, the obtained (BiO) 2 CO 3 -BiO 2-x photocatalyst is subjected to SEM analysis, and the result is shown in FIG. 5 , which is the (BiO) 2 CO 3 -BiO 2-x prepared in Example 1 of the present invention The SEM image of the photocatalyst, it can be seen from Figure 5 that the (BiO) 2 CO 3 -BiO 2-x photocatalyst prepared in this example is a nano-flower BiO 2-x and nano-sheet ( BiO) 2 CO 3 , the thickness of the (BiO) 2 CO 3 nanosheets is about 200-250 nm, and the particle size of the BiO 2-x nanoflowers is 100-500 nm.
对上述实施例1～3所制得的(BiO)2CO3-BiO2-x复合光催化剂的催化性能进行测试，具体为：The catalytic performance of the (BiO) 2 CO 3 -BiO 2-x composite photocatalysts prepared in the above examples 1 to 3 was tested, specifically:
在室温条件下，将各实施例所得(BiO)2CO3-BiO2-x复合光催化剂加入双酚A 溶液中，可见光照射50分钟，检测该催化剂对双酚A的降解率。At room temperature, the (BiO) 2 CO 3 -BiO 2-x composite photocatalyst obtained in each example was added to the bisphenol A solution and irradiated with visible light for 50 minutes to detect the degradation rate of bisphenol A by the catalyst.
在室温条件下，将各实施例所得(BiO)2CO3-BiO2-x复合光催化剂加入苯酚溶液中，可见光照射120分钟，检测该催化剂对苯酚的降解率。At room temperature, the (BiO) 2 CO 3 -BiO 2-x composite photocatalyst obtained in each example was added to the phenol solution and irradiated with visible light for 120 minutes to detect the degradation rate of the catalyst to phenol.
结果分别如图6与图7所示，图6为本发明各实施例的产物与纯(BiO)2CO3对双酚A的降解率对比结果，图7为本发明各实施例的产物与纯(BiO)2CO3对苯酚的降解率对照图。The results are shown in Fig. 6 and Fig. 7 respectively, Fig. 6 is the comparison result of the degradation rate of bisphenol A between the products of various embodiments of the present invention and pure (BiO) 2 CO 3 , Fig. 7 is the results of the products of various embodiments of the present invention and Comparison of the degradation rate of pure (BiO) 2 CO 3 to phenol.
由图6和7可知，实施例1所得产物对双酚A的解率达到75％，对苯酚的解率达到50％，实施例2所得产物对双酚A的解率达到72％，对苯酚的解率达到43％，实施例3所得产物对双酚A的解率达到71％，对苯酚的解率达到40％。由此可知，本发明制备的(BiO)2CO3-BiO2-x光催化剂相比于纯(BiO)2CO3具有较高的可见光催化活性，可用于降解双酚A和苯酚，并且相比于纯(BiO)2CO3的降解率较高。As can be seen from Figures 6 and 7, the solution rate of the product obtained in Example 1 to bisphenol A reached 75%, the solution rate of p-phenol reached 50%, the solution rate of the product obtained in Example 2 to bisphenol A reached 72%, and the solution rate of p-phenol reached 72%. The solution rate of bisphenol A reaches 43%, the solution rate of bisphenol A of the product obtained in Example 3 reaches 71%, and the solution rate of phenol reaches 40%. It can be seen that the (BiO) 2 CO 3 -BiO 2-x photocatalyst prepared by the present invention has higher visible light catalytic activity than pure (BiO) 2 CO 3 , and can be used for degrading bisphenol A and phenol, and it is The degradation rate is higher than that of pure (BiO) 2 CO 3 .
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