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Interference Effect of Alcohol on Nessler’s Reagent in Photocatalytic Nitrogen Fixation
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-03-04 00:00:00 , DOI: 10.1021/acssuschemeng.8b00110 Xiang Gao 1, 2 , Yuanjing Wen 3 , Dan Qu 3 , Li An 3 , Shiliang Luan 3 , Wenshuai Jiang 3 , Xupeng Zong 1, 2 , Xingyuan Liu 1 , Zaicheng Sun 3
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-03-04 00:00:00 , DOI: 10.1021/acssuschemeng.8b00110 Xiang Gao 1, 2 , Yuanjing Wen 3 , Dan Qu 3 , Li An 3 , Shiliang Luan 3 , Wenshuai Jiang 3 , Xupeng Zong 1, 2 , Xingyuan Liu 1 , Zaicheng Sun 3
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Photocatalytic ammonia synthesis is another important reaction to mimic natural nitrogen fixation, which has attracted more and more attention. In recent reports, sacrificial agents are often used to promote charge separation, and high-activity photocatalysts are discovered by using Nessler’s reagent method as a detection technique of ammonia production. However, there is an open question on the rationality and accuracy of the ammonia production amount in the presence of the sacrificial agent and Nessler’s reagent detection method. In this report, P25 TiO2 is employed as a model photocatalyst and alcohol as sacrificial agent, and both Nessler’s reagent and cation exchange chromatography are employed as ammonia detection methods. The different ammonia production amount was found by the different detection method. HPLC and 1H NMR results indicate that carbonyl compounds (formaldehyde, acetaldehyde, and acetone) are produced in the reaction. When the carbonyl compound was added to the ammonia standard solution, the interference effect on the detection of ammonia was found in the Nessler’s reagent method. No interference effect was found in the cation exchange chromatography. Thus, the Nessler’s reagent is not suitable for ammonia detection in the presence of alcohol as the sacrificial agent.
中文翻译：
酒精对纳斯勒试剂在光催化固氮中的干扰作用
光催化氨合成是模拟自然固氮的另一重要反应，已引起越来越多的关注。在最近的报道中，牺牲剂经常被用于促进电荷分离，并且通过使用奈斯勒试剂法作为氨产生的检测技术发现了高活性光催化剂。然而，在存在牺牲剂和奈斯勒试剂检测方法的情况下，氨生产量的合理性和准确性存在悬而未决的问题。在本报告中，P25 TiO 2用纳尔（Nessler's）试剂和阳离子交换色谱法作为氨气检测方法。通过不同的检测方法发现了不同的氨生产量。HPLC和1 H NMR结果表明在反应中生成了羰基化合物（甲醛，乙醛和丙酮）。当将羰基化合物添加到氨标准溶液中时，在Nessler试剂法中发现了对氨检测的干扰作用。在阳离子交换色谱中未发现干扰作用。因此，在乙醇作为牺牲剂的情况下，奈斯勒试剂不适用于氨气的检测。
更新日期：2018-03-04
中文翻译：
酒精对纳斯勒试剂在光催化固氮中的干扰作用
光催化氨合成是模拟自然固氮的另一重要反应，已引起越来越多的关注。在最近的报道中，牺牲剂经常被用于促进电荷分离，并且通过使用奈斯勒试剂法作为氨产生的检测技术发现了高活性光催化剂。然而，在存在牺牲剂和奈斯勒试剂检测方法的情况下，氨生产量的合理性和准确性存在悬而未决的问题。在本报告中，P25 TiO 2用纳尔（Nessler's）试剂和阳离子交换色谱法作为氨气检测方法。通过不同的检测方法发现了不同的氨生产量。HPLC和1 H NMR结果表明在反应中生成了羰基化合物（甲醛，乙醛和丙酮）。当将羰基化合物添加到氨标准溶液中时，在Nessler试剂法中发现了对氨检测的干扰作用。在阳离子交换色谱中未发现干扰作用。因此，在乙醇作为牺牲剂的情况下，奈斯勒试剂不适用于氨气的检测。
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