长治学院学报
長治學院學報
장치학원학보
JOURNAL OF CHANGZHI UNIVERSITY
2014年
5期
4-8
,共5页
光催化%溴酸钾%刚果红%表观活化能%羟基自由基
光催化%溴痠鉀%剛果紅%錶觀活化能%羥基自由基
광최화%추산갑%강과홍%표관활화능%간기자유기
Photocatalytic%Potassium bromated%Congo red%apparent activation energy%hydroxyl radicals
本文研究表明溴酸钾（KBrO3）可光催化降解刚果红，刚果红的降解效率随溴酸钾用量的增加而增加，随刚果红初始浓度的增加而降低。较低的活化能表明较少的能量即可使刚果红的化学键断裂。捕获剂实验结果表明羟基自由基在刚果红的光催化降解反应中起主要作用。
本文研究錶明溴痠鉀（KBrO3）可光催化降解剛果紅，剛果紅的降解效率隨溴痠鉀用量的增加而增加，隨剛果紅初始濃度的增加而降低。較低的活化能錶明較少的能量即可使剛果紅的化學鍵斷裂。捕穫劑實驗結果錶明羥基自由基在剛果紅的光催化降解反應中起主要作用。
본문연구표명추산갑（KBrO3）가광최화강해강과홍，강과홍적강해효솔수추산갑용량적증가이증가，수강과홍초시농도적증가이강저。교저적활화능표명교소적능량즉가사강과홍적화학건단렬。포획제실험결과표명간기자유기재강과홍적광최화강해반응중기주요작용。
An experiment demonstrated that the dye of Congo Red (CR) in water could be photocatalytic degraded effectively in the presence of potassium bromate (KBrO 3) under simulated sunlight irradiation. The degradation efficiency of CR increased as the dosage of KBrO 3 increased, while decreased as the CR initial concentration increased. When the dosage of KBrO 3 was 1.5 g·L-1, the degradation of CR was up to 100%in 30 min. This paper revealed that the degradation reaction followed pseudo first-order kinetics. The apparent activation energy (Ea) for 40 mg·L-1 CR between 298 K and 328 K was 8.073 kJ·mol-1. The lower Ea indicated that the breakdown of the chemical bonds of CR in photodegradation reaction required less energy. By examining the effect of isopropanol (IPA), ethanol (EA) and methanol (MT) as the scavenger of hydroxyl radicals, it was shown that hydroxyl radicals played a main role in photodegradation of CR with KBrO 3.
