Pyrimidines and their derivatives are widely found in natural products,agrochemicals,and pharmaceutical compounds,such as osimertinib,tofacitinnib,nilotinib,and fluoxastrobin(Fig.S1 online)[1].Considering their signif...Pyrimidines and their derivatives are widely found in natural products,agrochemicals,and pharmaceutical compounds,such as osimertinib,tofacitinnib,nilotinib,and fluoxastrobin(Fig.S1 online)[1].Considering their significance,the effective construction of pyrimidines has gained considerable attention[2,3].展开更多
A merger of copper catalysis and semiconductor photocatalysis using polymeric carbon nitride(PCN)for multi-type cross-coupling reactions was developed.This dual-catalytic system enables mild C-H arylation,chalcogenati...A merger of copper catalysis and semiconductor photocatalysis using polymeric carbon nitride(PCN)for multi-type cross-coupling reactions was developed.This dual-catalytic system enables mild C-H arylation,chalcogenation,and C-N cross-coupling reactions under visible light irradiation with a broad substrate scope.Good-to-excellent yields were obtained with appreciable site selectivity and functional group tolerance.Metal-free and low-cost PCN photocatalyst can easily be recovered and reused several times.展开更多
Here, PbCrO4 nanorods, a commonly used and low-cost yellow pigment, was synthesized via a simple pre-cipitation reaction and can serve as a highly efficient oxygen production and photodegradation photocatalyst. The ob...Here, PbCrO4 nanorods, a commonly used and low-cost yellow pigment, was synthesized via a simple pre-cipitation reaction and can serve as a highly efficient oxygen production and photodegradation photocatalyst. The obtained PbCrO4 nanorods exhibit excellent stability and pho-tocatalytic performance for O2 evolution from water. The production rate is approximately 314.0μmol h^-1 g^-1 under visible light, and the quantum efficiency is approximately 2.16% at 420±10 nm and 0.05% at 600±10 nm. In addition, the PhCrO4 shows good degradation performance for methylene blue, methyl blue, methyl orange and phenol under visible-light irradiation. These results indicate that it is potential to fabricate an effective, robust PbCrO4 photocatalyst by trans-forming heavy-metal pollutants Pb（II） and Cr（VI） into a highly efficient O2 evolution and photodegradation material. This strategy which uses pollutant to produce clean energy and degrade contaminants is completely green and environmentally benign, and thus could be a promising way for practical environmental applications. Keywords： 02 evolution, pollutant, PbCrO4 nanorods, visible-light-active, photocatalyst展开更多
基金supported by the National Key Research and Development Program of China(2021YFA1600800)the National Natural Science Foundation of China(21972094,22372102,and22102102)+3 种基金the Educational Commission of Guangdong Province(839-0000013131)Guangdong Basic and Applied Basic Re-search Foundation(2020A1515010982)Shenzhen Science and Technology Program(RCJC20200714114434086 and 20221425)the Research Team Cultivation Program of Shenzhen University(2023QNT013)。
文摘Pyrimidines and their derivatives are widely found in natural products,agrochemicals,and pharmaceutical compounds,such as osimertinib,tofacitinnib,nilotinib,and fluoxastrobin(Fig.S1 online)[1].Considering their significance,the effective construction of pyrimidines has gained considerable attention[2,3].
基金supported by the National Natural Science Foundation of China(21972094 and 21805191)Guangdong Special Support Program+4 种基金Pengcheng Scholar ProgramChina Postdoctoral Science Foundation(2019M653004)Shenzhen Peacock Plan(KQTD2016053112042971)Shenzhen Science and Technology Program(JCYJ20190808142001745,JCYJ20200812160737002,and RCJC20200714114434086)Guangdong Basic and Applied Basic Research Foundation(2020A1515010982)。
文摘A merger of copper catalysis and semiconductor photocatalysis using polymeric carbon nitride(PCN)for multi-type cross-coupling reactions was developed.This dual-catalytic system enables mild C-H arylation,chalcogenation,and C-N cross-coupling reactions under visible light irradiation with a broad substrate scope.Good-to-excellent yields were obtained with appreciable site selectivity and functional group tolerance.Metal-free and low-cost PCN photocatalyst can easily be recovered and reused several times.
基金jointly supported by the National Natural Science Foundation of China(21401190)the Science and Technology Project of Research Foundation of China Postdoctoral Science(2017M612710 and 2016M592519)+2 种基金Shenzhen Peacock Plan(827-000059,827-000113 and KQTD2016053112042971)the Science and Technology Planning Project of Guangdong Province(2016B050501005)the Educational Commission of Guangdong Province(2016KCXTD006 and 2016KSTCX126)
文摘Here, PbCrO4 nanorods, a commonly used and low-cost yellow pigment, was synthesized via a simple pre-cipitation reaction and can serve as a highly efficient oxygen production and photodegradation photocatalyst. The obtained PbCrO4 nanorods exhibit excellent stability and pho-tocatalytic performance for O2 evolution from water. The production rate is approximately 314.0μmol h^-1 g^-1 under visible light, and the quantum efficiency is approximately 2.16% at 420±10 nm and 0.05% at 600±10 nm. In addition, the PhCrO4 shows good degradation performance for methylene blue, methyl blue, methyl orange and phenol under visible-light irradiation. These results indicate that it is potential to fabricate an effective, robust PbCrO4 photocatalyst by trans-forming heavy-metal pollutants Pb（II） and Cr（VI） into a highly efficient O2 evolution and photodegradation material. This strategy which uses pollutant to produce clean energy and degrade contaminants is completely green and environmentally benign, and thus could be a promising way for practical environmental applications. Keywords： 02 evolution, pollutant, PbCrO4 nanorods, visible-light-active, photocatalyst
