Article
Environmental Sciences
Yunfei Wu, Jiwei Li, Chen Jiang, Yunjie Xia, Jun Tao, Ping Tian, Chang Zhou, Chaoying Wang, Xiangao Xia, Ru-jin Huang, Renjian Zhang
Summary: The study estimated the absorption coefficient of organic carbon (OC) in Beijing during a polluted winter, finding that the absorption properties of OC are influenced by the coating thickness and wavelength of black carbon. The mass absorption efficiency of OC significantly decreased as wavelength increased.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
D. G. Kaskaoutis, G. Grivas, I Stavroulas, A. Bougiatioti, E. Liakakou, U. C. Dumka, E. Gerasopoulos, N. Mihalopoulos
Summary: This study investigated the spectral properties and source characteristics of absorbing aerosols in the urban background of Athens, revealing significant differences in the contribution of various components to total absorption between day and night. BrC and biomass burning aerosols showed higher contributions at shorter wavelengths, while different behaviors were observed for BCff, BrCff, BCbb, BrCbb, and BrCsec components. Sensitivity analysis supported the reliability of the results, which could have important implications for radiative transfer models.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Nanoscience & Nanotechnology
Yingnan Song, Yong Li, Bing Ge, Jingxian Wang, Jiangtao Li
Summary: In this paper, a ternary compound system with a lotus-like papillomatous structure is introduced, which achieves self-cooling and self-cleaning properties. The optimized membrane has high infrared emissivity and sunlight reflectivity, effectively cooling the object and protecting the membrane from pollution.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Arman Peyravi, Zaher Hashisho, David Crompton, James E. Anderson
Summary: This study successfully improved the transparency of polymeric adsorbents to microwaves and enhanced their thermal stability and microwave regeneration ability by synthesizing porous hyper-crosslinked polymers containing carbon black. The results showed that 4% carbon black content was the optimal filler content, achieving the highest adsorption and minimal impact on the porosity of the adsorbents.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Meteorology & Atmospheric Sciences
Aki Virkkula
Summary: The Aethalometer model is widely used for estimating contributions of fossil fuel emissions and biomass burning to equivalent black carbon absorption, with uncertainties in interpretation due to particle size, internal structure, and other factors. Evaluating the uncertainties in apparent fractions of absorption by eBC from fossil fuel and biomass burning revealed the significant impact of size distribution on absorption.
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2021)
Article
Chemistry, Multidisciplinary
Zachary J. Berquist, Andrew J. Gayle, Neil P. Dasgupta, Andrej Lenert
Summary: Transparent refractory aerogels show improved stability and receiver efficiency, enabling the use of lower-cost optical focusing systems and eliminating the need for highly evacuated receivers. Transitioning to higher operating temperatures can facilitate the use of advanced supercritical CO2 power cycles and lead to approximately a 10% improvement in solar-to-electrical conversion efficiency.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Environmental
Lu Zhang, Zhihan Luo, Yaojie Li, Yuanchen Chen, Wei Du, Gang Li, Hefa Cheng, Guofeng Shen, Shu Tao
Summary: This study assessed particulate BC and BrC emissions from real-world indoor coal and biomass burning, finding that coal cake combustion had the highest BC EF and charcoal burning had the highest BrC EF. Using iron stoves for burning fuel resulted in lower BC and BrC EFs, and the difference between heating and cooking activities was not statistically significant.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Jiali Chen, Lei Wang, Bin Shen, Wenge Zheng
Summary: In this study, a composite material with Co/C particles embedded in carbon networks was synthesized, showing higher electromagnetic interference shielding effectiveness (SE) than pure carbon networks. The remarkable performance is attributed to the aligned carbon networks and the Co/C particles, which can regulate the SE by changing the angle between the fiber orientation direction and the direction of the incident EM-wave electric field and enhance the shielding performance through catalytic graphitization. The composite material has the potential to be used as efficient biomass-based electromagnetic attenuation materials.
Article
Green & Sustainable Science & Technology
Kegui Lu, Qiongwan Yu, Bin Zhao, Gang Pei
Summary: A new PV/T system is proposed based on spectral beam splitting and serial thermal circuit to decouple power generation and heat collection, resulting in higher outlet water temperature and lower solar cell temperature, leading to a comprehensive efficiency improvement of 17.9% compared to traditional PV/T systems.
Article
Chemistry, Multidisciplinary
Huang Hedong, Guo Zeyu, Yang Pengyan, Chen Peng, Wu Jie
Summary: Carbon-black-modified carbon nanofibers showed enhanced conductivity and oil absorption capacity, with improvements in these properties observed with increasing carbonization temperature.
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
(2021)
Article
Optics
Sihong Zhu, Hua Zhang, Chen Zhou, Xiaodong Wei, Yi Liu
Summary: Based on actual atmospheric observations, the optical properties of mixed black and brown carbon aerosols were calculated. It was found that there is little difference in volumetric absorptive coefficient in the ultraviolet band, but the internal mixing models significantly reduce the single scattering albedo in visible and near-infrared bands. The thickness of the brown carbon shell and environmental relative humidity have important impacts on the optical properties.
Article
Engineering, Environmental
Qiyuan Wang, Huikun Liu, Jianhuai Ye, Jie Tian, Ting Zhang, Yong Zhang, Suixin Liu, Junji Cao
Summary: The study used a receptor model coupled with multiwavelength absorption information to retrieve a site-dependent AAE(BC) and found that AAE(BC) was 1.19, indicating a more accurate value for light absorption by carbonaceous aerosols. This result challenges the commonly assumed AAE(BC) value of 1.0 in the literature and provides insights for improving accuracy in quantifying light absorption.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2021)
Article
Environmental Sciences
Saliou Mbengue, Nadezda Zikova, Jaroslav Schwarz, Petr Vodicka, Adela Holubova Smejkalova, Ivan Holoubek
Summary: This study investigated the mass absorption cross-section of equivalent BC (MAC(eBC)) during a long-term field measurement in a rural Central European site, showing seasonal and diurnal variations in B-abs and MAC(eBC). The contribution of BrC coatings to the absorption coefficient was found to be significant, with higher values in winter due to local biomass burning. Summer saw an increase in E-abs, attributed to the formation of larger BC coatings by secondary aerosol fractions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Dong Chen, Wenxin Zhao, Lei Zhang, Qiuyue Zhao, Jie Zhang, Feng Chen, Huipeng Li, Miao Guan, Yu Zhao
Summary: The mass absorption efficiency (MAE) of black carbon (BC) can be amplified by internal mixing and the lensing effect from non-absorbing coating, enhancing BC's global warming effect. Observations in Nanjing showed relatively large MAE values in 2016, likely due to high levels of BC internal mixing. The ratio of non-absorbing particulate matter (NAPM) to elemental carbon (EC) had a strong positive correlation with MAE value, indicating that coating thickness promotes BC's light absorption ability. Chemical component coating had a greater impact on MAE amplification in autumn and winter, with nitrate coating having the strongest effect followed by organic matter. The developed statistical model can separate the effects of internal mixing and non-absorbing coating.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Jiajing Pei, Tao Wang, Rui Sui, Xuejiang Zhang, Danni Zhou, Fengjuan Qin, Xu Zhao, Qinghua Liu, Wensheng Yan, Juncai Dong, Lirong Zheng, Ang Li, Junjie Mao, Wei Zhu, Wenxing Chen, Zhongbin Zhuang
Summary: A highly active CO2RR catalyst, Co-N-Ni/NPCNSs, with N-bridged Co-N-Ni bimetallic sites has been reported. The N-bridged sites were confirmed to promote the formation of COOH* intermediates, thereby accelerating CO2RR. The catalyst showed significantly higher activity and efficiency compared to single Co-N-4 and Ni-N-4 sites.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)