Frontiers in Energy最新文献_第10页

In situ growth of a-few-layered MoS2 on CdS nanorod for high efficient photocatalytic H2 production 在CdS纳米棒上原位生长几层二硫化钼用于高效光催化制氢

IF 2.9 4区工程技术

Frontiers in Energy Pub Date : 2021-09-15 DOI: 10.1007/s11708-021-0779-3

Wei Chen, Xiang Liu, Shaojie Wei, Qianqian Heng, Binfen Wang, Shilong Liu, Li Gao, Liqun Mao

引用次数: 3

Visible light responsive photocatalysts developed by substitution with metal cations aiming at artificial photosynthesis 针对人工光合作用，采用金属阳离子取代制备可见光响应光催化剂

IF 2.9 4区工程技术

Frontiers in Energy Pub Date : 2021-09-10 DOI: 10.1007/s11708-021-0774-8

Yuichi Yamaguchi, Akihiko Kudo

引用次数: 8

Layered alkali titanates (A2TinO2n+1): possible uses for energy/environment issues 层状碱钛酸盐(A2TinO2n+1):可能用于能源/环境问题

IF 2.9 4区工程技术

Frontiers in Energy Pub Date : 2021-09-10 DOI: 10.1007/s11708-021-0776-6

Taya Ko Saothayanun, Thipwipa Tip Sirinakorn, Makoto Ogawa

{"title":"Layered alkali titanates (A2TinO2n+1): possible uses for energy/environment issues","authors":"Taya Ko Saothayanun, Thipwipa Tip Sirinakorn, Makoto Ogawa","doi":"10.1007/s11708-021-0776-6","DOIUrl":"10.1007/s11708-021-0776-6","url":null,"abstract":"<div>Uses of layered alkali titanates (A2TinO2n+1; Na2Ti3O7, K2Ti4O9, and Cs2Ti5O11) for energy and environmental issues are summarized. Layered alkali titanates of various structural types and compositions are regarded as a class of nanostructured materials based on titanium oxide frameworks. If compared with commonly known titanium dioxides (anatase and rutile), materials design based on layered alkali titanates is quite versatile due to the unique structure (nanosheet) and morphological characters (anisotropic particle shape). Recent development of various synthetic methods (solid-state reaction, flux method, and hydrothermal reaction) for controlling the particle shape and size of layered alkali titanates are discussed. The ion exchange ability of layered alkali titanate is used for the collection of metal ions from water as well as a way of their functionalization. These possible materials design made layered alkali titanates promising for energy (including catalysis, photocatalysts, and battery) and environmental (metal ion concentration from aqueous environments) applications.</div>","PeriodicalId":570,"journal":{"name":"Frontiers in Energy","volume":"15 3","pages":"631 - 655"},"PeriodicalIF":2.9,"publicationDate":"2021-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4437023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Z-scheme CdS/WO3 on a carbon cloth enabling effective hydrogen evolution 碳布上的Z-scheme CdS/WO3能够有效析氢

IF 2.9 4区工程技术

Frontiers in Energy Pub Date : 2021-09-10 DOI: 10.1007/s11708-021-0768-6

Zehong Xu, Qiaohong Zhu, Xinguo Xi, Mingyang Xing, Jinlong Zhang

引用次数: 6

Theoretical study on flow and radiation in tubular solar photocatalytic reactor 管式太阳能光催化反应器流动与辐射的理论研究

IF 2.9 4区工程技术

Frontiers in Energy Pub Date : 2021-09-10 DOI: 10.1007/s11708-021-0773-9

Qingyu Wei, Yao Wang, Bin Dai, Yan Yang, Haijun Liu, Huaijie Yuan, Dengwei Jing, Liang Zhao

引用次数: 3

Interfacial charge transfer and photocatalytic activity in a reverse designed Bi2O3/TiO2 core-shell 反设计Bi2O3/TiO2核-壳结构的界面电荷转移和光催化活性

IF 2.9 4区工程技术

Frontiers in Energy Pub Date : 2021-09-10 DOI: 10.1007/s11708-021-0772-x

Sabina Ait Abdelkader, Zhenpeng Cui, Abdelghani Laachachi, Christophe Colbeau-Justin, Mohamed Nawfal Ghazzal

{"title":"Interfacial charge transfer and photocatalytic activity in a reverse designed Bi2O3/TiO2 core-shell","authors":"Sabina Ait Abdelkader, Zhenpeng Cui, Abdelghani Laachachi, Christophe Colbeau-Justin, Mohamed Nawfal Ghazzal","doi":"10.1007/s11708-021-0772-x","DOIUrl":"10.1007/s11708-021-0772-x","url":null,"abstract":"<div>In this study, the electronic and photocatalytic properties of core-shell heterojunctions photocatalysts with reversible configuration of TiO2 and Bi2O3 layers were studied. The core-shell nanostructure, obtained by efficient control of the sol-gel polymerization and impregnation method of variable precursors of semiconductors, makes it possible to study selectively the role of the interfacial charge transfer in each configuration. The morphological, optical, and chemical composition of the core-shell nanostructures were characterized by high-resolution transmission electron microscopy, UV-visible spectroscopy and X-ray photoelectron spectroscopy. The results show the formation of homogenous TiO2 anatase and Bi2O3 layers with a thickness of around 10 and 8 nm, respectively. The interfacial charge carrier dynamic was tracked using time resolved microwave conductivity and transition photocurrent density. The charge transfer, their density, and lifetime were found to rely on the layout layers in the core-shell nanostructure. In optimal core-shell design, Bi2O3 collects holes from TiO2, leaving electrons free to react and increase by 5 times the photocatalytic efficiency toward H2 generation. This study provides new insight into the importance of the design and elaboration of optimal heterojunction based on the photocatalyst system to improve the photocatalytic activity.</div>","PeriodicalId":570,"journal":{"name":"Frontiers in Energy","volume":"15 3","pages":"732 - 743"},"PeriodicalIF":2.9,"publicationDate":"2021-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4743812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Photoelectrocatalytic generation of H2 and S from toxic H2S by using a novel BiOI/WO3 nanoflake array photoanode 新型BiOI/WO3纳米片阵列光阳极催化有毒H2S生成H2和S

IF 2.9 4区工程技术

Frontiers in Energy Pub Date : 2021-09-10 DOI: 10.1007/s11708-021-0775-7

Jing Bai, Bo Zhang, Jinhua Li, Baoxue Zhou

{"title":"Photoelectrocatalytic generation of H2 and S from toxic H2S by using a novel BiOI/WO3 nanoflake array photoanode","authors":"Jing Bai, Bo Zhang, Jinhua Li, Baoxue Zhou","doi":"10.1007/s11708-021-0775-7","DOIUrl":"10.1007/s11708-021-0775-7","url":null,"abstract":"<div>In this paper, a photoelectrocatalytic (PEC) recovery of toxic H2S into H2 and S system was proposed using a novel bismuth oxyiodide (BiOI)/ tungsten trioxide (WO3) nano-flake arrays (NFA) photoanode. The BiOI/WO3 NFA with a vertically aligned nanostructure were uniformly prepared on the conductive substrate via transformation of tungstate following an impregnating hydroxylation of BiI3. Compared to pure WO3 NFA, the BiOI/WO3 NFA promotes a significant increase of photocurrent by 200%. Owing to the excellent stability and photoactivity of the BiOI/WO3 NFA photoanode and ({{rm{I}}^ - }{rm{/I}}_3^ - ) catalytic system, the PEC system toward splitting of H2S totally converted S2− into S without any polysulfide (({rm{S}}_x^{n - })) under solar-light irradiation. Moreover, H2 was simultaneously generated at a rate of about 0.867 mL/(h ·cm). The proposed PEC H2S splitting system provides an efficient and sustainable route to recover H2 and S.</div>","PeriodicalId":570,"journal":{"name":"Frontiers in Energy","volume":"15 3","pages":"744 - 751"},"PeriodicalIF":2.9,"publicationDate":"2021-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4440568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Accounting greenhouse gas emissions of food consumption between urban and rural residents in China: a whole production perspective 中国城乡居民食品消费的温室气体排放核算:一个整体生产视角

IF 2.9 4区工程技术

Frontiers in Energy Pub Date : 2021-07-30 DOI: 10.1007/s11708-021-0763-y

Yanfeng Xu, Yong Geng, Ziyan Gao, Shijiang Xiao, Chenyi Zhang, Mufan Zhuang

{"title":"Accounting greenhouse gas emissions of food consumption between urban and rural residents in China: a whole production perspective","authors":"Yanfeng Xu, Yong Geng, Ziyan Gao, Shijiang Xiao, Chenyi Zhang, Mufan Zhuang","doi":"10.1007/s11708-021-0763-y","DOIUrl":"10.1007/s11708-021-0763-y","url":null,"abstract":"<div>Food consumption is necessary for human survival. On a global scale, the greenhouse gas (GHG) emission related to food consumption accounts for 19%–29% of the total GHG emission. China has the largest population in the world, which is experiencing a rapid development. Under the background of urbanization and the adjustment of the diet structure of Chinese residents, it is critical to mitigate the overall GHG emission caused by food consumption. This study aims to employ a singleregion input-output (SRIO) model and a multi-regional input-output (MRIO) model to measure GHG emission generated from food consumption in China and compare the contributions of different industrial sectors, uncovering the differences between urban and rural residents and among different provinces (autonomous regions/municipalities), as well as identifying the driving forces of GHG emission from food consumption at a national level. The results indicate that the total GHG emission generated from food consumption in China tripled from 157 Mt CO2e in 2002 to 452 Mt CO2e in 2017. The fastest growing GHG emission is from the consumption of other processed food and meat products. Although GHG emissions from both urban and rural residents increased, the gap between them is increasing. Agriculture, processing and manufacture of food, manufacture of chemical and transportation, storage and post services sectors are key sectors inducing food consumption related GHG emissions. From a regional perspective, the top five emission provinces (autonomous regions/municipalities) include Shandong, Hubei, Guangdong, Zhejiang, and Jiangsu. Based on such results, policy recommendations are proposed to mitigate the overall GHG emission from food consumption.</div>","PeriodicalId":570,"journal":{"name":"Frontiers in Energy","volume":"16 2","pages":"357 - 374"},"PeriodicalIF":2.9,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s11708-021-0763-y","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5151939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Development of a fan-stirred constant volume combustion chamber and turbulence measurement with PIV 风扇搅拌等容燃烧室的研制及PIV湍流测量

IF 2.9 4区工程技术

Frontiers in Energy Pub Date : 2021-07-30 DOI: 10.1007/s11708-021-0762-z

Haoran Zhao, Jinhua Wang, Xiao Cai, Zhijian Bian, Hongchao Dai, Zuohua Huang

{"title":"Development of a fan-stirred constant volume combustion chamber and turbulence measurement with PIV","authors":"Haoran Zhao, Jinhua Wang, Xiao Cai, Zhijian Bian, Hongchao Dai, Zuohua Huang","doi":"10.1007/s11708-021-0762-z","DOIUrl":"10.1007/s11708-021-0762-z","url":null,"abstract":"<div>A fan-stirred combustion chamber is developed for spherically expanding flames, with P and T up to 10 bar and 473 K, respectively. Turbulence characteristics are estimated using particle image velocimetry (PIV) at different initial pressures (P = 0.5–5 bar), fan frequencies (ω = 0–2000 r/min), and impeller diameters (D = 100 and 114 mm). The flame propagation of methanol/air is investigated at different turbulence intensities (u′ =0–1.77 m/s) and equivalence ratios (ϕ = 0.7–1.5). The results show that u′ is independent of P and proportional to ω, which can be up to 3.5 m/s at 2000 r/min. LT is independent of P and performs a power regression with ω approximately. The turbulent field is homogeneous and isotropic in the central region of the chamber while the inertial subrange of spatial energy spectrum is more collapsed to −5/3 law at a high ReT. Compared to laminar expanding flames, the morphology of turbulent expanding flames is wrinkled and the wrinkles will be finer with the growth of turbulence intensity, consistent with the decline of the Taylor scale and the Kolmogorov scale. The determined SL in the present study is in good agreement with that of previous literature. The SL and ST of methanol/air have a non-monotonic trend with ϕ while peak ST is shifted to the richer side compared to SL. This indicates that the newly built turbulent combustion chamber is reliable for further experimental study.</div>","PeriodicalId":570,"journal":{"name":"Frontiers in Energy","volume":"16 6","pages":"973 - 987"},"PeriodicalIF":2.9,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s11708-021-0762-z","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5151015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

In situ grown TiN/N-TiO2 composite for enhanced photocatalytic H2 evolution activity 原位生长TiN/N-TiO2复合材料增强光催化析氢活性

IF 2.9 4区工程技术

Frontiers in Energy Pub Date : 2021-07-30 DOI: 10.1007/s11708-021-0766-8

Dong Liu, Zhuqing Yan, Peng Zeng, Haoran Liu, Tianyou Peng, Renjie Li

{"title":"In situ grown TiN/N-TiO2 composite for enhanced photocatalytic H2 evolution activity","authors":"Dong Liu, Zhuqing Yan, Peng Zeng, Haoran Liu, Tianyou Peng, Renjie Li","doi":"10.1007/s11708-021-0766-8","DOIUrl":"10.1007/s11708-021-0766-8","url":null,"abstract":"<div>Titanium nitride (TiN) decorated N-doped titania (N-TiO2) composite (TiN/N-TiO2) is fabricated via an in situ nitridation using a hydrothermally synthesized TiO2 and melamine (MA) as raw materials. After the optimization of the reaction condition, the resultant TiN/N-TiO2 composite delivers a hydrogen evolution activity of up to 703 μmol/h under the full spectrum irradiation of Xe-lamp, which is approximately 2.6 and 32.0 times more than that of TiO2 and TiN alone, respectively. To explore the underlying photocatalytic mechanism, the crystal phase, morphology, light absorption, energy band structure, element composition, and electrochemical behavior of the composite material are characterized and analyzed. The results indicate that the superior activity is mainly caused by the in situ formation of plasmonic TiN and N-TiO2 with intimate interface contact, which not only extends the spectral response range, but also accelerates the transfer and separation of the photoexcited hot charge carrier of TiN. The present study provides a fascinating approach to in situ forming nonmetallic plasmonic material/N-doped TiO2 composite photocatalysts for high-efficiency water splitting.</div>","PeriodicalId":570,"journal":{"name":"Frontiers in Energy","volume":"15 3","pages":"721 - 731"},"PeriodicalIF":2.9,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s11708-021-0766-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5151027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10