The invention discloses a porous graphite phase carbon nitride photocatalyst co-doped with phosphorus and bismuth and its application, which belongs to the field of photocatalysis. The photocatalyst is prepared by thermal condensation reaction of urea, hexachlorocyclotriphosphate and bismuth nitrate. The catalyst was applied to visible light degradation of dyes in wastewater. The two elements doped by the photocatalyst of the present invention exist in the form of chemical bonds in nitrogen carbide, so the photocatalytic degradation stability of the photocatalyst is significantly improved; by Co-doping of phosphorus and bismuth in carbon nitride, the defect density concentration in carbon nitride is significantly reduced, the rapid recombination of photogenerated electron pairs is inhibited, and the photocatalytic degradation ability of organic pollutants is enhanced. Moreover, the Co-doping of two elements is much higher than the photocatalytic ability of carbon nitride doped with single element. Moreover, the preparation process of the catalyst is simple, the cost is low, the catalyst efficiency is high, and the regeneration performance is excellent, so it has broad application prospects.
【技术实现步骤摘要】
一种磷、铋共掺杂的多孔石墨相氮化碳光催化剂及其用途
本专利技术属于光催化领域,涉及多孔石墨相氮化碳光催化剂,特别涉及一种磷、铋共掺杂的多孔石墨相氮化碳光催化剂及其用途。
技术介绍
合成染料广泛应用于纺织、造纸、塑料和皮革等行业,但随之产生了大量的印染废水,严重威胁着自然环境和人类的健康。印染废水具有色度深、毒性大和难降解等特点,采取常规方法难以达到有效的处理。光催化具有效率高、能耗低和稳定性强,并且降解彻底,不产生二次污染等诸多优点,具有广泛的应用前景。常用的光催化剂,比如TiO2和ZnO,只能在紫外光下才具有正常工作,严重限制了其使用范围。氮化碳是一种新型的非金属可见光光催化剂,具有独特的半导体能带结构和优异的化学稳定性,然而传统的氮化碳具有低比表面积、缺陷密度高和光生电子对复合快等缺点,催化效率仍然需要进一步提高。为改变这一情况,国内外科研人员进行了大量研究,主要分为以下三个方向:提高石墨相碳化氮的比表面积;将石墨相碳化氮与半导体光催化剂进行复合形成异质结复合光催化剂;对石墨相碳化氮进行元素的掺杂,从而进一步拓展石墨相碳化氮在环境和能源领域的应用。多孔石墨相氮化碳具有较大的比表面积,可使催化剂的反应活性位点增多,有利于光生电子与空穴迁移至催化剂表面参与反应,提高g-C3N4光催化性能。公开号为CN107983388A的中国专利技术专利报道了磷掺杂的多孔石墨相氮化碳,对印染废水有较好的催化效果。但是催化剂制备过程中,并且需要利用酚醛树脂球作为模板,制备过程繁琐,不利于催化剂的推广使用;文献1:JournalofColloidandInterfaceSci ...
【技术保护点】
1.一种磷、铋共掺杂的多孔石墨相氮化碳光催化剂,其特征在于,该光催化剂通过尿素、六氯环三磷腈和硝酸铋热缩聚反应制备。
【技术特征摘要】
1.一种磷、铋共掺杂的多孔石墨相氮化碳光催化剂,其特征在于,该光催化剂通过尿素、六氯环三磷腈和硝酸铋热缩聚反应制备。2.如权利要求1所述磷、铋共掺杂的多孔石墨相氮化碳光催化剂,其特征在于:尿素、六氯环三磷腈和硝酸铋的质量比为20~60:1:0.1~1。3.如权利要求2所述磷、铋共掺杂的多孔石墨相氮化碳光催化剂,其特征在于:尿素、六氯环三磷腈和硝酸铋的质量比为40:1:0.5。4.如权利要求1或2所述磷、铋共掺杂的多孔石墨相氮化碳光催化剂,其特征在于:所述热缩聚反应在空气气氛下,于450~650℃加热2~4h。5.如权利要求4所述磷、铋共掺杂的多孔石墨相氮化碳光催化剂,其特征在于:反应过程中升温速率为2~4℃/min。6.如权利要求1所述磷、铋共掺杂的多孔石墨相氮化碳光催化剂,其特征在于:所述热...
【专利技术属性】
技术研发人员:翟立红,杨瑛,腾峰,周兰庭,陈婧,郑康鹏,肖娟,
申请(专利权)人:湖北文理学院,
类型:发明
国别省市:湖北,42
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