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metal-organic framework UiO-66-NH2 and cellulose nanofibers mat for high-performance adsorption of dye rosebengal

《化学科学与工程前沿（英文）》 2022年第16卷第9期页码 1387-1398 doi: 10.1007/s11705-022-2154-2

摘要： UiO-66-NH₂ is an efficient material for removing pollutants from wastewater due to its high specific surface area, high porosity and water stability. However, recycling them from wastewater is difficult. In this study, the cellulose nanofibers mat deacetylated from cellulose acetate nanofibers were used to combine with UiO-66-NH₂ by the method of in-situ growth to remove the toxic dye, rose bengal. Compared to previous work, the prepared composite could not only provide ease of separation of UiO-66-NH₂ from the water after adsorption but also demonstrate better adsorption capacity (683 mg∙g^‒1 (T = 25 °C, pH = 3)) than that of the simple UiO-66-NH₂ (309.6 mg∙g^‒1 (T = 25 °C, pH = 3)). Through the analysis of adsorption kinetics and isotherms, the adsorption for rose bengal is mainly suitable for the pseudo-second-order kinetic model and Freundlich model. Furthermore, the relevant research revealed that the main adsorption mechanism of the composite was electrostatic interaction, hydrogen bonding and π–π interaction. Overall, the approach depicts an efficient model for integrating metal-organic frameworks on cellulose nanofibers to improve metal-organic framework recovery performance with potentially broad applications.

关键词： UiO-66-NH₂ cellulose nanofibers rose bengal adsorption mechanism

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复合镍基催化剂催化CO₂ 光热甲烷化反应中氧化铈和氧化钛的助催化作用 Article

Ee Teng Kho,Salina Jantarang,Zhaoke Zheng,Jason Scott,Rose Amal

《工程（英文）》 2017年第3卷第3期页码 393-401 doi: 10.1016/J.ENG.2017.03.016

摘要：

太阳能驱动二氧化碳(CO₂) 转化为燃料是解决CO₂ 减排和快速增长的世界能源需求的理想方案。本文利用光照辐射镍基负载催化剂床层引发加热效应以促进CO₂ 的转化，研究了不同组成的氧化铈-氧化钛复合氧化物载体及其对光热CO₂ 转化的影响。提高光热CO₂ 甲烷化活性的两个至关重要的因素分别是：①优化的镍颗粒负载对于高活性催化面积及用于加热催化床层的更高的光吸收能力是必需的；②载体上的缺陷位对于促进CO₂ 吸附及随后的活化是必需的。载体中的钛对维持掺杂氧化钛的氧化铈上的氧空位缺陷起着关键作用。当氧化铈和氧化钛混合比例理想时，再结合高光照吸收以及稳定的还原状态，有利于CO₂ 吸附及随后高效光热CO₂ 甲烷化反应的发生。

关键词：光热二氧化碳还原镍氧化铈氧化钛

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Investigation of wind energy potentials in Brunei Darussalam

M. A. SALAM, M. G. YAZDANI, Q. M. RAHMAN, Dk NURUL, S. F. MEI, Syeed HASAN

《能源前沿（英文）》 2019年第13卷第4期页码 731-741 doi: 10.1007/s11708-018-0528-4

摘要： Conventional power generation mainly depends on natural gas and diesel oil in Brunei Darussalam. The power utility company is now thinking of power generation using natural wind. In this paper, wind energy, being one of the most readily available renewable energy sources, was studied. The wind characteristic, velocity and directions were studied using Weibull distribution based on the measurement of wind speed at two different locations in Brunei Darussalam. These wind speed distributions were modeled using the Wind Power program. The wind rose graph was obtained for the wind direction to analyze the wind power density onshore and offshore. Based on this analysis, it has been found that the wind speed of 3 to 5 m/s has a probability of occurrence of 40%. Besides, the annual energy production at a wind speed of 5 m/s has been found to be in the range between 1000 and 1500 kWh for both the locations in Brunei Darussalam.

关键词： wind speed Weibull distribution wind rose wind energy wind power