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二硫化钼高效电催化析氢的改性策略

化工新型材料 2024年第7期52卷 35-40页

作者：杜娟蔡天风韩乔武宏大杨占旭辽宁石油化工大学石油化工学院抚顺113001

电解水制氢技术是提供廉价清洁能源的一种非常有前途的方法。二硫化钼(MoS_(2))以其优异的电催化活性作为潜在的电催化析氢(HER)催化剂受到广泛关注。然而,MoS_(2)的HER性能需要改进才能与传统的Pt基催化剂竞争。详细分析基于MoS_(2)表... 详细信息

电解水制氢技术是提供廉价清洁能源的一种非常有前途的方法。二硫化钼(MoS_(2))以其优异的电催化活性作为潜在的电催化析氢(HER)催化剂受到广泛关注。然而,MoS_(2)的HER性能需要改进才能与传统的Pt基催化剂竞争。详细分析基于MoS_(2)表面/界面工程提高HER性能的最新研究进展,总结了提高HER性能的有效策略,如相工程、缺陷工程和异质结构的构建等典型策略,以揭示通过调控表面电子结构、提高电导率、暴露活性位点促进HER动力学。

关键词：二硫化钼表面工程电催化剂析氢反应

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One-step Synthesis and Photocatalytic Degradation Performance of Sulfur-doped Porous g-C_(3)N_(4)Nanosheets

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China Petroleum Processing & Petrochemical Technology 2022年第1期24卷 81-89页

作者： Liu Yuan Zhao Hua Li Huipeng cai tianfeng School of Petrochemical Engineering Liaoning Petrochemical UniversityLiaoning 113001

In this study,the sulfur-doped porous g-C_(3)N_(4) nanosheets(CN-T-U 1.75)were synthesized successfully by onestep calcination utilizing urea and thiourea as *** visible light irradiation,CN-T-U 1.75 showed remarkable photocatalytic activity for Rhodamine B(RhB)degradation with a kinetic reaction rate constant of 0.01838 min^(-1).The characterization analysis indicated that CN-T-U 1.75 had a higher specific surface area and the doping altered the energy band *** work offers a new viewpoint on modifying the band structure of a photocatalyst using a doping strategy,as well as new insights into the generation routes of active species involved in the photocatalytic process.

关键词： sulfur-doped g-C3N4 nanosheets photocatalysis degradation

Purification of Crude Glycerol from Waste Cooking Oil Based Biodiesel Production by Orthogonal Test Method

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China Petroleum Processing & Petrochemical Technology 2013年第1期15卷 48-53页

作者： cai tianfeng Li Huipeng Zhao Hua Liao Kejian School of Petrochemical Engineering Liaoning Shihua University

Purification of original crude glycerol obtained from biodiesel production was conducted in a laboratory scale equipment by means of a combined chemical and physical treatment method based upon repeated cycles of acidification of liquid phase to the desired pH value by using 5.85% H3PO4 solution for pH value adjustment, and the mixture was kept at 70 ℃ for 60 rain to make phase separation for obtaining a glycerol-rich middle phase. The yield of crude glycerol reached 81.2%. Subsequently, upon reaction of the obtained glycerol phase with 0.03% of sodium oxalate at 80 ℃ for 30 min the impurity removal rate was equal to 19.8%. The fraction boiling between 164 ℃ and 200 ℃ was collected by vacuum distil- lation followed by decolorization with 2% of active carbon at 80 ℃ for two times to yield the product glycerol with an ac- ceptable purity of 98.10%.

关键词： crude glycerol sodium oxalate biodiesel purification glycerol-rich layer

Oxidation-extraction desulfurization of model oil over Zr-ZSM-5/SBA-15 and kinetic study

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Frontiers of Chemical Science and Engineering 2014年第2期8卷 203-211页

作者： Chuanzhu LU Hui FU Huipeng LI Hua ZHAO tianfeng cai School of Petrochemical Engineering Liaoning Shihua University Fushun 113001 China

ZSM-5/SBA-15 composite molecular sieves were synthesized using post-synthesis method and characterized by X-ray diffraction and N2 adsorption-desorption. The oxidative-extration desulfurization of model oil was investigated by using hydrogen peroxide as the oxidant, tetrabutyl ammonium bromide as phase transfer catalyst, dimethyl sulfoxide as extractant, and Zr-ZSM-5/ SBA-15, Ag-ZSM-5/SBA-15, Ce-ZSM-5/SBA-15 as catalyst. Under the optimal conditions, the desulfurization rate decreases in the order： Zr-ZSM-5/SBA-15 〉 Ce-ZSM- 5/SBA-15 〉 Ag-ZSM-5/SBA-15. The highest desulfuriza- tion rate is 84.53% under the catalysis of Zr-ZSM-5/SBA- 15. Kinetics analysis shows that the reaction is pseudofirst-order with the activation energy of 44.23 kJ/mol.

关键词： composite molecular sieve oxidation desul-furation extraction kinetic

Acylation of Anisole Catalyzed by Hierarchical Porous Hβ Zeolite Modified with Cr

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Chemical Research in Chinese Universities 2018年第6期34卷 877-881页

作者： LI Guohua LI Huipeng ZHAO Hua cai tianfeng LI Yange GUAN Shengnan College of Chemistry Chemical Engineering and Environmental Engineering Liaoning Shihua University Fushun 113001 P. R. China

Modified hierarchical porous Hβ zeolite was obtained by metal modification of Hβ zeolite, which was treated with alkaline solution, and the catalysts before and after modification were characterized by means of X-ray diffraction（XRD）, nitrogen adsorption-desorption~ scanning electron microscopy（SEM）, X-ray fluorescence（XRF）, NH3 temperature-programmed desorption and Fourier-transform infrared spectroscopy（FTIR）. The activities of acy- lation of anisole with acetic anhydride were also investigated. The results show that the Hp zeolite, which was treated with alkaline solution has microporous and mesoporous structures that could improve the diffusion performance of chemical reaction. The amount of acid was modulated with metal modification. The Hβ zeolite modified by 5%（mass fraction） metal chromium had the best catalytic performance. The conversion of acetic anhydride acylation was 93.01% under the optimal conditions, which was higher than that of other catalysts. The catalyst not only showed good activity, but also exhibited a stable performance in regeneration tests.

关键词： Hierarchical porous Hβ zeolite Anisole Acetic anhydride Acylation

Fe掺杂Bi_(12)TiO_(20)光催化剂的制备及光催化性能

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精细化工 2022年第12期39卷 2514-2520页

作者：李明月李会鹏赵华蔡天凤辽宁石油化工大学石油化工学院辽宁抚顺113001

以Bi(NO_(3))_(3)·5H_(2)O、钛酸四丁酯和FeCl_(3)为原料,采用水热-煅烧法制备Fe掺杂的Bi_(12)TiO_(2)0光催化剂(Fe-Bi_(12)TiO_(20)),使用XRD、UV-Vis DRS、SEM、氮气吸附-脱附、XPS对其进行了表征,并将其用于光催化降解亚甲基蓝(MB)。结果表明,当Fe的掺杂量为5%[以Bi(NO_(3))3·5H_(2)O和钛酸四丁酯的总质量为基准,下同]时,制得的催化剂(记为5%Fe-BTO)投加量为0.05 g时,其对质量浓度为10 mg/L(溶液体积50 mL)MB的降解率达到98.95%。经过Fe掺杂后,Fe-Bi_(12)TiO_(20)光催化剂形成了新的杂化能级,吸收带边界发生红移,进而提高催化剂的光催化活性,Fe以+3和+2价掺杂于Bi_(12)TiO_(20)晶体中。Fe-Bi_(12)TiO_(20)光催化剂经过重复使用5次后,对MB的降解率仍可达88%以上,具有优秀的光催化稳定性能。空穴(h+)和超氧自由基(·O_(2)^(–))是光催化降解过程中的主要活性物种。

关键词：掺杂 Bi_(12)TiO_(20) 亚甲基蓝降解水热法催化技术

碳氯共掺杂介孔g-C_(3)N_(4)的气泡模板法制备及光催化性能

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材料工程 2022年第9期50卷 70-77页

作者：刘源赵华李会鹏蔡天凤王禹程辽宁石油化工大学石油化工学院辽宁抚顺113001

以三聚氰胺、葡萄糖和氯化铵为原料制备一种具有高比表面积的碳氯共掺杂介孔g-C_(3)N_(4)(C-Cl-CN)光催化剂,并考察其光催化降解罗丹明B(RhB)的性能。采用XRD,XPS,SEM,UV-Vis DRS和PL测试手段表征和分析催化剂的晶型结构、化学组成及微... 详细信息

以三聚氰胺、葡萄糖和氯化铵为原料制备一种具有高比表面积的碳氯共掺杂介孔g-C_(3)N_(4)(C-Cl-CN)光催化剂,并考察其光催化降解罗丹明B(RhB)的性能。采用XRD,XPS,SEM,UV-Vis DRS和PL测试手段表征和分析催化剂的晶型结构、化学组成及微观形貌。结果表明:C-Cl-CN具有最高的比表面积(108.7 m 2/g),降解RhB的速率常数达到0.02290 min^(-1),是纯g-C_(3)N_(4)的9.4倍,且具有良好的催化稳定性。葡萄糖和氯化铵在聚合过程中起到双气泡模板和元素掺杂剂的作用,一方面提升催化剂的比表面积,另一方面减小能带间隙,增强催化剂的光吸收性能。

关键词：共掺杂石墨相氮化碳光催化降解

Shor's algorithm does not factor large integers in the presence of noise

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Science China(Information Sciences) 2024年第7期67卷 305-320页

作者： Jin-Yi cai College of Letters and Science University of Wisconsin

We consider Shor's quantum factoring algorithm in the setting of noisy quantum gates. Under a generic model of random noise for(controlled) rotation gates, we prove that the algorithm does not factor integers of the form pq when the noise exceeds a vanishingly small level in terms of n—the number of bits of the integer to be factored, where p and q are from a well-defined set of primes of positive density. We further prove that with probability 1-o(1) over random prime pairs(p, q), Shor's factoring algorithm does not factor numbers of the form pq, with the same level of random noise present.

关键词： random noise Shor's algorithm rotation gates quantum computing prime factorization

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碳掺杂g-C_(3)N_(4)多孔纳米管的制备及光催化性能

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石油化工 2022年第2期51卷 148-154页

作者：刘源李会鹏赵华蔡天凤辽宁石油化工大学石油化工学院辽宁抚顺113001

结合超分子前体组装法和气泡模板法,以葡萄糖为气泡模板的同时作为碳掺杂剂制备了碳掺杂g-C_(3)N_(4)多孔纳米管(CCNPNT),通过XRD,XPS,SEM,UV-Vis,PL等方法对制备的CCNPNT进行表征,考察了CCNPNT光催化降解罗丹明B(RhB)的性能。表征结果... 详细信息

结合超分子前体组装法和气泡模板法,以葡萄糖为气泡模板的同时作为碳掺杂剂制备了碳掺杂g-C_(3)N_(4)多孔纳米管(CCNPNT),通过XRD,XPS,SEM,UV-Vis,PL等方法对制备的CCNPNT进行表征,考察了CCNPNT光催化降解罗丹明B(RhB)的性能。表征结果显示,CCNPNT具有较大的比表面积,光吸收能力和电子-空穴的分离效率均得到提高。实验结果表明,CCNPNT对RhB的降解反应速率常数达0.02206 min^(-1),分别是纯g-C_(3)N_(4)纳米管和g-C_(3)N_(4)的3.3倍和9.1倍;CCNPNT三次循环使用后催化降解RhB的性能没有明显下降,具有优异的催化稳定性。

关键词：碳掺杂石墨相氮化碳光催化降解