Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences
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蓝细菌乙醇光合细胞工厂的发展与展望
No full text生物乙醇是极具应用潜力和代表性的生物能源产品之一。以蓝细菌为光合平台，利用二氧
化碳和太阳能直接进行乙醇合成可以同时起到降低二氧化碳排放和提供可再生能源的效果，具有重
要的研究与应用价值。本文回顾了蓝细菌乙醇光合细胞工厂相关技术的发展历程和现状，从途径优
化、底盘选择和代谢工程策略等层面对其最新进展和所遇到的问题进行了总结介绍，并对该技术未
来发展方向进行了展望。Bioethanol is one of the most promising and representative biofuel products. Photosynthetic production of ethanol using CO2 and solar energy based on cyanobacteria is of great significance for research and application, due to the potential to
reduce CO2 emission and to provide renewable energy simultaneously. Here we review the history and updated development of cyanobacteria cell factories for ethanol photosynthetic production, the progress and problems in pathway optimization,
chassis selection, and metabolic engineering strategies, and finally indicate the future development in this area
A Rational Design of High-Performance Sandwich-Structured Quasisolid State Li-O2 Battery with Redox Mediator
No full textSimultaneous Evolution of Uniaxially Oriented Grains and Ultralow-Density Grain-Boundary Network in CH3NH3PbI3 Perovskite Thin Films Mediated by Precursor Phase Metastability
No full text化学工程
No full textElectrical vehicle and portable electronic markets are experiencing explosive growth, which increase the global demands for secondary batteries with high energy density. The energy density of secondary batteries is mainly determined by the employed material systems. It is necessary to develop novel anode materials with high capacities to achieve high energy density of secondary batteries performances. Germanium-based materials have been investigated extensively as anodes for high energy density secondary batteries owing to their fascinating theoretical specific capacities (1600 mAh/g for Li4.4Ge, 369 mAh/g for NaGe ). In this paper, we focused our attention on Ge-based chalcogenide anode materials with high performances. The concrete research contents are summarized as follows:
(1) The ternary Ge-based sulfides Cu2GeS3 (CGS) were successfully prepared via a hydrothermal method and sulfuration treatment. We study the electrochemical performance of CGS as an anode for lithium ion batteries for the first time. The results demonstrated that the CGS delivered excellent stable cycle property (only 0.079% capacity loss from the 2nd to 200th cycle) and high rate capability. These excellent properties can be ascribed to the favourable Li+ diffusion coefficient of CGS, and the nanostructured CGS which can accommodate large volume change during the charge/discharge process. More importantly, this work offers a new option to develop Ge-based anode materials for high performance lithium ion batteries.
(2) Activation with Li induces amorphization of CGS and accelerates solid-state diffusion of sodium ion that improves the sodium storage properties of CGS. Li activation of CGS was performed by a single lithiation/delithiation cycle. The actived CGS (a-CGS) demonstrates a dramatic improvement in cycling stability (the specific capacity of a-CGS is higher than that of CGS about 110 mAh/g after 60 cycles at current density of 100 mA/g). When applied to a full cell by coupling a Na3V2(PO4)3 cathode, the assembled Na3V2(PO4)3/a-CGS full cell exhibits favorable capacity retention (the capacity retention was enhanced from 7% to 86.9% after 100 cycles at current density of 100 mA/g), better rate capability and higher coulombic efficiency compared with Na3V2(PO4)3/CGS full cell.
(3) The crystalline framework material is a promising lithium/sodium ion batteries anode materials. In this work, we report the successful synthesis of a crystalline [Cu8Ge6Se19](C5H12N)6 (CGSe) material via a solvothermal method and explore their application as anode materials for lithium/sodium ion batteries. The crystal structure analysis shows that the as-prepared sample has 3D interconnected channels. The porous structures is beneficial for good electrolyte penetration and accelerates solid-state diffusion of lithium/sodium ion. This investigation will open up a new exploration of crystalline framework materials for secondary batteries in the future.中
Research on butene oligomerization reaction over the hemicellulose modified HZSM-5
No full textThe HZSM-5 was synthesized with modifying by different contents of hemicellulose. The morphology, texture and acidity were characterized with XRD, SEM, N2 adsorption-desorption, NH3-TPD and Py-IR. Butene oligomerization over the modified HZSM-5 was tested. The results indicated that the HZSM-5 with 1.6% hemicellulose exhibited the best activity and stability on the butene oligomerization reaction. The conversion can maintain about 80% after 140 h on stream with the highest selectivities of the trimer, tetramer and diesel component in the products, which may be related with its high BET surface and mesoporous volume, and the strongest acidity
Novel anaerobic membrane bioreactor (AnMBR) design for wastewater treatment at long HRT and high solid concentration
No full textPerformance of two novel designed anaerobic membrane bioreactor (AnMBRs) for wastewater treatment at long
hydraulic retention time (HRT, 47 days) and high sludge concentration (22 g·L−1) was investigated. Results
showed steady chemical oxygen demand (COD) removal (> 98%) and mean biogas generation of
0.29 LCH4·g−1COD. Average permeates flux of 58.70 L·m−2·h−1 and 54.00 L·m−2·h−1 were achieved for reactors
A and B, respectively. On top of reactor configuration, long HRT caused biofilm reduction by heterotrophic
bacteria Chloroflexi resulting in high membrane flux. Mean total membrane resistances (2.23 × 109 m−1) and
fouling rates (4.00 × 108 m−1·day−1) of both reactors were low suggesting better membrane fouling control
ability of both AnMBRs. Effluent quality analysis showed the effluent soluble microbial products (SMP) were
dominated by proteins compared to carbohydrates, and specific ultraviolet absorbance (SUVA) analysis revealed
effluent from both reactors had low aromaticity with SUVA < 1 (L·mg−1·m−1) except for the first ten days
Balancing high open circuit voltage over 1.0 V and high short circuit current in benzodithiophene-based polymer solar cells with low energy loss: a synergistic effect of fluorination and alkylthiolation
No full textCarbon sequestration processes and mechanisms in coastal mariculture environments in China
No full textChina is the global leader in mariculture production. Increasing sequestered marine carbon (also known as blue
carbon) via mariculture activities is a promising approach for mitigating climate change and promoting the development of a
low-carboneconomy. Mariculture blue carbon is also considered an important component of China’s“sea granary”. In addition to shellfsh and macroalgae yields, which represent carbon removed from mariculture environment, blue carbon also includes
other important components, which have been largely neglected in the past, such as the carbon transformed by microbes,
dissolved organic carbon (mainly referred to as recalcitrant dissolved organic carbon), and sedimentary particulate carbon. Hence,
from different aspects, a comprehensive study on the formation processes and mechanisms of carbon sequestration is of great
signifcance for comprehensively unveiling the carbon sequestration capability in coastal mariculture environment, which will
contribute to the sustainable development of the fshery economy and construction of an ecological civilization. Moreover,it may
add signifcant economic benefts to the futur ecarbon-trading market
