摘要
以沙林模拟剂——氯磷酸二乙酯(DECP)在P25TiO2上的热降解反应和光催化降解反应,通过原位红外光谱(In situ IR)和气相色谱-质谱联用(GC-MS)等方法考察两种降解反应过程.证实DECP的热降解产物主要包括:DEHP(Diethyl hydroxyphosphonate),TEPP(Tetraethly pyrophosphate)和TEP(Triethyl phosphate)等.光催化反应过程中气相降解产物中除了有DEHP,TEP和TEPP以外,还发现了CO2,CO,H2O,HCl,甲烷,乙醇,乙醛和微量的DEP(Diethyl phosphite)等.DECP的降解机理,其光催化反应由脱氯,P—O—R键断裂,C—C键断裂和含磷基团的重组等复杂过程构成,最终转化为CO2,H2O和HCl等无机产物.
DECP（ Diethyl chlorophosphite） , one of simulate compounds of the Sarin, can be degraded on P25 TiO2 as heating or UV irradiation. In situ IR and GC-MS were used to investigate the reactions. It is confirmed that the products of heating reaction in darkness include DEHP （Diethyl hydroxyphosphonate）, TEPP （Tetraethly pyrophosphate） and TEP （Tfiethyl phosphate） et al. In photocatalytic reaction, the gas phase products were found to have CO, H20, CO2, HCl, CH4, alcohol, ethanal and DEP （Diethyl phosphite） et al., besides DEHP, TEPP and TEP. DECP can undergoes a series of reactions such as the dechlorination, P--O--R bond splitting, C--C bond splitting, organo-phosphorus groups reompossing , and be degraded finally into CO2, H20, HCl, and other inorganic compounds.
出处
《环境化学》
CAS
CSCD
北大核心
2008年第5期553-558,共6页
Environmental Chemistry
基金
国家自然科学基金(20473113)资助项目
关键词
氯磷酸二乙酯
光催化
二氧化钛.
diethyl chlorophosphite（ DECP）, photocatalysis, titanium dioxide.
