After John wrote the abstract "通过氧化-沉淀法合成了具有光催化活性的α-FeO(OH)纳米棒,用TGA、SEM、BET等分析方法进行结构表征和性能测试,并对其降解偶氮类染料的性能进行了研究.结果表明,产物主要成分为针铁矿α-FeO(OH),另含有少量Fe3O4;产物长径比较高,比表面积为32.89m2/g,并具有优良的磁性能.在作为光催化剂降解偶氮类染料甲基橙的实验中,α-FeO(OH)纳米棒表现出较好的催化效果.在21W、50W模拟光源和自然光照下降解3h以上,其脱色率分别为29.8%、43.5%和76.4%.", he wrote these keywords "光催化降解, 合成, 产物". Do you think his choice of keywords was correct? Answer yes or no.
no