CN106955696B - 一种锡酸铋/石墨烯复合可见光催化剂的制备方法 - Google Patents
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Abstract
本发明公开了一种锡酸铋/石墨烯复合可见光催化剂的制备方法，具体步骤为：将2mmol的Bi(NO3)3·5H2O溶解于20mL摩尔浓度为4mol/L的硝酸溶液中，之后向溶液中加入2mmol锡粒搅拌溶解记为溶液X；将0.3g GO溶于20mL乙醇中得到黄色澄清溶液Y；在搅拌条件下，将溶液Y加入到溶液X中，继续搅拌30min，用摩尔浓度为2mol/L的氢氧化钠溶液调节混合体系的pH=12；待pH稳定后，继续搅拌2h，转入反应釜于180℃反应24h，离心分离，用水和乙醇各洗三次，冷冻干燥得到锡酸铋/石墨烯复合可见光催化剂。本发明制得的可见光催化剂的吸收光谱范围宽，性能稳定，无毒、高效低廉，能够应用于难生物降解染料废水的降解。
Description
技术领域
本发明属于可见光催化材料的合成技术领域，具体涉及一种锡酸铋/石墨烯复合可见光催化剂的制备方法。
背景技术
近年来，工业生产尤其是纺织业排出大量的高浓度有机染料废水，由于其生产的流程长，这些废水中组分很复杂，含有大量有机物，其中染料大多是由机芳香族化合物苯环上的氢被卤素、硝基、胺基取代以后生成的芳香族卤化物、芳香族硝基化合物、芳香族胺类化学物、联苯等多苯环取代化合物，其色泽深、碱度高、难生物降解、臭味大、COD值比较高，而且染料大多生物毒性比较大，严重污染环境和危害人体健康，采用常规的生物处理方法去除效果不够理想。20世纪90年代以来，各国开始逐步发展重视半导体材料的环境性能，经过几年的发展，环境材料学应运而生。光催化氧化技术是去除工业有机废水中难生物降解污染物的有效方法，具有极大的开发潜力和良好的应用前景。在众多新型光催化材料中，铋系光催化剂以其种类丰富、较高的光催化活性和优良的可见光吸收能力，引起了研究者们的极大兴趣。但如何进一步提高其光量子效率和光催化性能，以满足该技术的实际应用和产业化发展的要求，仍然是该类光催化材料面临的重大挑战。因此，研究开发高活性、高稳定性和良好循环利用性能的可见光催化剂，是国内外水处理领域的重要前沿课题。
发明内容
本发明解决的技术问题是提供了一种能够有效降解罗丹明B（RhB）染料废水的锡酸铋/石墨烯复合可见光催化剂的制备方法。
本发明为解决上述技术问题采用如下技术方案，一种锡酸铋/石墨烯复合可见光催化剂的制备方法，其特征在于具体步骤为：（1）将2mmol的Bi(NO3)3·5H2O溶解于20mL摩尔浓度为4mol/L的硝酸溶液中，之后向溶液中加入2mmol锡粒搅拌溶解记为溶液X；（2）将0.3gGO溶于20mL乙醇中得到黄色澄清溶液Y；（3）在搅拌条件下，将溶液Y加入到溶液X中，继续搅拌30min，用摩尔浓度为2mol/L的氢氧化钠溶液调节混合体系的pH=12；（4）待pH稳定后，继续搅拌2h，转入反应釜于180℃反应24h，离心分离，用水和乙醇各洗三次，冷冻干燥得到锡酸铋/石墨烯复合可见光催化剂。
本发明制得的锡酸铋/石墨烯复合可见光催化剂具有较好光吸收性能，而且具有可见光响应的光催化性能，在太阳光下具有高效降解罗丹明B染料废水的性能，其吸收光谱范围宽，性能稳定，无毒、高效低廉，能够应用于难生物降解染料废水的降解，具有较强的市场应用前景。
具体实施方式
以下通过实施例对本发明的上述内容做进一步详细说明，但不应该将此理解为本发明上述主题的范围仅限于以下的实施例，凡基于本发明上述内容实现的技术均属于本发明的范围。
实施例1
将2mmol的Bi(NO3)3·5H2O溶解于20mL摩尔浓度为4mol/L的硝酸溶液中，之后向溶液中加入2mmol锡粒搅拌溶解，用摩尔浓度为2mol/L的氢氧化钠溶液调节混合体系的pH=12；待pH稳定后，继续搅拌2h，转入反应釜于180℃反应24h，离心分离，用水和乙醇各洗三次，冷冻干燥得到产品。经过3h自然太阳光照射，上述制得产品对RhB的脱色率为4.24%。
实施例2
将2mmol的Bi(NO3)3·5H2O溶解于20mL摩尔浓度为4mol/L的硝酸溶液中，之后向溶液中加入2mmol锡粒搅拌溶解记为X；将0.15g GO溶于20mL乙醇中得到黄色澄清溶液Y；在搅拌条件下，将溶液Y加入到溶液X中，继续搅拌30min，用摩尔浓度为2mol/L的氢氧化钠溶液调节混合体系的pH=12；待pH稳定后，继续搅拌2h，转入反应釜于180℃反应24h，离心分离，用水和乙醇各洗三次，冷冻干燥得到产品。经过3h自然太阳光照射，上述制得产品对RhB的脱色率为10.13%。
实施例3
将2mmol的Bi(NO3)3·5H2O溶解于20mL摩尔浓度为4mol/L的硝酸溶液中，之后向溶液中加入2mmol锡粒搅拌溶解记为X；将0.225g GO溶于20mL乙醇中得到黄色澄清溶液Y；在搅拌条件下，将溶液Y加入到溶液X中，继续搅拌30min，用摩尔浓度为2mol/L的氢氧化钠溶液调节混合体系的pH=12；待pH稳定后，继续搅拌2h，转入反应釜于180℃反应24h，离心分离，用水和乙醇各洗三次，冷冻干燥得到产品。经过3h自然太阳光照射，上述制得产品对RhB的脱色率为39.75%。
实施例4
将2mmol的Bi(NO3)3·5H2O溶解于20mL摩尔浓度为4mol/L的硝酸溶液中，之后向溶液中加入2mmol锡粒搅拌溶解记为X；将0.3g GO溶于20mL乙醇中得到黄色澄清溶液Y；在搅拌条件下，将溶液Y加入到溶液X中，继续搅拌30min，用摩尔浓度为2mol/L的氢氧化钠溶液调节混合体系的pH=12；待pH稳定后，继续搅拌2h，转入反应釜于180℃反应24h，离心分离，用水和乙醇各洗三次，冷冻干燥得到产品。经过3h自然太阳光照射，上述制得产品对RhB的脱色率为90.39%。
实施例5
将2mmol的Bi(NO3)3·5H2O溶解于20mL摩尔浓度为4mol/L的硝酸溶液中，之后向溶液中加入2mmol锡粒搅拌溶解记为X；将0.375g GO溶于20mL乙醇中得到黄色澄清溶液Y；在搅拌条件下，将溶液Y加入到溶液X中，继续搅拌30min，用摩尔浓度为2mol/L的氢氧化钠溶液调节混合体系的pH=12；待pH稳定后，继续搅拌2h，转入反应釜于180℃反应24h，离心分离，用水和乙醇各洗三次，冷冻干燥得到产品。经过3h自然太阳光照射，上述制得产品对RhB的脱色率为62.74%。
实施例6
将2mmol的Bi(NO3)3·5H2O溶解于20mL摩尔浓度为4mol/L的硝酸溶液中，之后向溶液中加入2mmol锡粒搅拌溶解记为X；将0.45g GO溶于20mL乙醇中得到黄色澄清溶液Y；在搅拌条件下，将溶液Y加入到溶液X中，继续搅拌30min，用摩尔浓度为2mol/L的氢氧化钠溶液调节混合体系的pH=12；待pH稳定后，继续搅拌2h，转入反应釜于180℃反应24h，离心分离，用水和乙醇各洗三次，冷冻干燥得到产品。经过3h自然太阳光照射，上述制得产品对RhB的脱色率为41.99%。
以上实施例描述了本发明的基本原理、主要特征及优点，本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明原理的范围下，本发明还会有各种变化和改进，这些变化和改进均落入本发明保护的范围内。
Claims (1)
1.一种锡酸铋/石墨烯复合可见光催化剂的制备方法，其特征在于具体步骤为：（1）将2mmol的Bi(NO3)3·5H2O溶解于20mL摩尔浓度为4mol/L的硝酸溶液中，之后向溶液中加入2mmol锡粒搅拌溶解记为溶液X；（2）将0.3g GO溶于20mL乙醇中得到黄色澄清溶液Y；（3）在搅拌条件下，将溶液Y加入到溶液X中，继续搅拌30min，用摩尔浓度为2mol/L的氢氧化钠溶液调节混合体系的pH=12；（4）待pH稳定后，继续搅拌2h，转入反应釜于180℃反应24h，离心分离，用水和乙醇各洗三次，冷冻干燥得到锡酸铋/石墨烯复合可见光催化剂。
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| CN110237810A (zh) * | 2019-05-21 | 2019-09-17 | 河南师范大学 | 一种协同吸附-光催化降解土霉素废水的氯氧化铋/石墨烯三维气凝胶的制备方法 |
| CN114768839B (zh) * | 2022-05-16 | 2024-06-25 | 陕西科技大学 | 一种铋系复合光催化剂及其制备方法和应用 |
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| CN103977785A (zh) * | 2014-02-27 | 2014-08-13 | 上海大学 | 一种Bi2Sn2O7/石墨烯复合可见光催化剂及其制备方法 |
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