O613.632
国家自然科学基金资助项目（52063028）；新疆维吾尔自治区自然科学基金项目（2019D01B36，2019D01A69）；新疆师范大学电化学技术与应用工程研究中心（工程中心）招标课题（XJNUGCZX122017B04）；自治区高校科研计划项目（XJEDU2018Y030）；自治区"百名青年博士引进计划"天池博士项目（BS2017002）；新疆维吾尔自治区"天山青年计划"优秀青年科技人才项目（2017Q027）；新疆师范大学博士启动项目（XJNUBS1907）。
以商业红磷（C-RP）为原料，NaOH溶液为调节剂，采用水热法处理C-RP获得HRP-pHx（x=5，7，9）光催化剂。选择罗丹明B （RhB）为降解对象考察HRP-pHx的光催化活性，其中HRP-pH7展现出最高的光催化活性，对RhB的降解速率常数为3.1×10-2，是未调pH水热处理所得HRP的2.8倍。结果表明，调节pH增强RP光催化活性的主要机理是均匀的结构和较小的粒径使得HRP-pH7比HRP具有更多的活性位点。循环光降解实验结果发现HRP-pH7循环降解RhB五次后的降解率仍大于92%，体现了较好的稳定性。捕获剂实验发现光降解中起主要作用的是光生空穴和超氧基自由基。
With commercial red phosphorus (C-RP) as the raw material and NaOH as the regulator, the HRP-pHx (x=5, 7, 9) photocatalyst was obtained by hydrothermal treatment. The photocatalytic activity of HRP-pHx was evaluated by photodegrading Rhodamine B (RhB), in which HRP-pH7 manifested the highest photocatalytic activity. Its rate constant for RhB was 3.1×10-2, which was 2.8 times that of HRP. The series characterization results showed that the main reason for the RP photocatalytic activity enhanced by adjusting pH is that the uniform structure and the smaller particle size make HRP-pH7 have more active sites than HRP. The repeated experiments indicated that HRP-pH7 was a stable photocatalyst for degrading RhB (the degradation rate was over 92% for reusing the catalyst the fourth time). In active species trapping experiments it was found that the photogenerated holes and superoxide free radicals played a main role in degrading RhB.
郭仓臣,王云,马玉花,库尔班·买吐逊,木尼热·艾尼娃,朱恩权. pH对水热合成红磷晶体及其光催化性能的影响[J].重庆大学学报,2020,43(12):118-124.
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