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Enhancing Photocatalytic Hydrogen Evolution through Electronic Structure and Wettability Adjustment of ZnIn_(2)S_(4)/Bi_(2)O_(3) S-Scheme Heterojunction
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作者 Linfeng Xiao Wanlu Ren +4 位作者 Shishi Shen Mengshan Chen runhua liao Yingtang Zhou Xibao Li 《物理化学学报》 SCIE CAS CSCD 北大核心 2024年第8期50-63,共14页
The production of renewable fuels through water splitting via photocatalytic hydrogen production holds significant promise.Nonetheless,the sluggish kinetics of hydrogen evolution and the inadequate water adsorption on... The production of renewable fuels through water splitting via photocatalytic hydrogen production holds significant promise.Nonetheless,the sluggish kinetics of hydrogen evolution and the inadequate water adsorption on photocatalysts present notable challenges.In this study,we have devised a straightforward hydrothermal method to synthesize Bi_(2)O_(3)(BO)derived from metal‐organic frameworks(MOFs),loaded with flower-like ZnIn_(2)S_(4)(ZIS).This approach substantially enhances water adsorption and surface catalytic reactions,resulting in a remarkable enhancement of photocatalytic activity.By employing triethanolamine(TEOA)as a sacrificial agent,the hydrogen evolution rate achieved with 15%(mass fraction)ZIS loading on BO reached an impressive value of 1610μmol∙h^(−1)∙g^(−1),marking a 6.34-fold increase compared to that observed for bare BO.Furthermore,through density functional theory(DFT)and ab initio molecular dynamics(AIMD)calculations,we have identified the reactions occurring at the ZIS/BO S-scheme heterojunction interface,including the identification of active sites for water adsorption and catalytic reactions.This study provides valuable insights into the development of high-performance composite photocatalytic materials with tailored electronic properties and wettability. 展开更多
关键词 S-scheme Hydrogen evolution WETTABILITY PHOTOCATALYSIS Electronic structure
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铜掺杂氮化碳电催化硝酸盐产氨性能研究
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作者 韩晶 廖润华 +4 位作者 邓文强 梁博宇 周雨晴 任帅 洪燕 《化学学报》 SCIE CAS CSCD 北大核心 2024年第3期295-302,共8页
NH_(3)是硝酸盐还原产物之一,不仅在工业中需要大量应用,在清洁生产过程中也是一种非常有前途的能源载体,现有的哈伯-博施(Haber-Bosch)工艺生产NH_(3)会对大气环境造成危害,而电催化法由于便捷、安全且能够在常温和常压下催化合成NH_(3... NH_(3)是硝酸盐还原产物之一,不仅在工业中需要大量应用,在清洁生产过程中也是一种非常有前途的能源载体,现有的哈伯-博施(Haber-Bosch)工艺生产NH_(3)会对大气环境造成危害,而电催化法由于便捷、安全且能够在常温和常压下催化合成NH_(3)成为最近研究的热点.本实验以3-氨基-1,2,4三唑为前驱体,利用热解法先合成C_(3)N_(5),再通过调控铜元素的比例在煅烧条件下合成Cu-C_(3)N_(5),合成一系列材料形貌、晶体构相、化学价态存在差异的C_3N_5基催化剂,并评价这些催化剂的电化学性能以及电催化硝酸盐还原产氨性能,通过在0.1 mol/L KOH+0.1 mol/L KNO_(3)混合电解液中进行1h电解实验后发现,氨气产量和法拉第效率可以达到0.541 mmol·h^(-1)·mg_(cat)^(-1)87.79%,远远高于C_3N_5,且该催化剂在循环试验和长时间实验中具有良好的活性和稳定性,表明在电催化硝酸盐领域中具有一定的研究价值. 展开更多
关键词 电催化还原 氨产率 法拉第效率 C_3N_5基催化剂 硝酸盐
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Performance and microbial diversity of an expanded granular sludge bed reactor for high sulfate and nitrate waste brine treatment 被引量:7
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作者 runhua liao Yan Li +7 位作者 Xuemin Yu Peng Shi Zhu Wang Ke Shen Qianqian Shi Yu Miao Wentao Li Aimin Li 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2014年第4期717-725,共9页
The disposal of waste brines has become a major challenge that hinders the wide application of ion- exchange resins in the water industry in recent decades. In this study, high sulfate removal efficiency (80%-90%) w... The disposal of waste brines has become a major challenge that hinders the wide application of ion- exchange resins in the water industry in recent decades. In this study, high sulfate removal efficiency (80%-90%) was achieved at the influent sulfate concentration of 3600 mg/L and 3% NaC1 after 145 days in an expanded granular sludge bed (EGSB) reactor. Furthermore, the feasibility of treating synthetic waste brine containing high levels of sulfate and nitrate was investigated in a single EGSB reactor during an operation period of 261 days. The highest nitrate and sulfate loading rate reached 6.38 and 5.78 kg/(m3-day) at SO42--S/NO3-N mass ratio of 4/3, and the corresponding removal efficiency was 99.97% and 82.26% at 3% NaC1, respectively. Meanwhile, 454-pyrosequencing technology was used to analyze the bacterial diversity of the sludge on the 240th day for stable operation of phase X. Results showed that a total of 9194 sequences were obtained, which could be affiliated to 14 phyla, including Proteobacteria, Firmicutes, Chlorobi, Bacteroidetes, Synergistetes and so on. Proteobacteria (77.66%) was the dominant microbial population, followed by Firmicutes (12.23%) and Chlorobi (2.71%). 展开更多
关键词 454-pyrosequencing waste brine denitrification expanded granular sludge bed (EGSB) reactor
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