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Preparation of Co/S co-doped carbon catalysts for excellent methylene blue degradation

International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 169-181页

作者： Haixu Li Haobo He Tiannan Jiang Yunfei Du Zhichen Wu Liang Xu Xinjie Wang xiaoguang liu Wanhua Yu Wendong Xue School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Beijing Jinyu Tongda Refractory Technologies Co. Ltd.Beijing 100085China

S and Co co-doped carbon catalysts were prepared via pyrolysis of MOF-71 and thiourea mixtures at 800℃at a mass ratio of MOF-71 to thiourea of 1:0.1 to effectively activate peroxymonosulfate(PMS)for methylene blue(MB)*** effects of two different mixing routes were identified on the MB degradation ***,the catalyst obtained by the alcohol solvent evaporation(MOF-AEP)mixing route could degrade 95.60%MB(50 mg/L)within 4 min(degradation rate:K=0.78 min^(-1)),which was faster than that derived from the direct grinding method(MOF-DGP,80.97%,K=0.39 min^(-1)).X-ray photoelectron spectroscopy revealed that the Co-S content of MOF-AEP(43.39at%)was less than that of MOF-DGP(54.73at%),and the proportion of C-S-C in MOF-AEP(13.56at%)was higher than that of MOF-DGP(10.67at%).Density functional theory calculations revealed that the adsorption energy of Co for PMS was -2.94 eV when sulfur was doped as C-S-C on the carbon skeleton,which was higher than that when sulfur was doped next to cobalt in the form of Co-S bond(-2.86 eV).Thus,the C-S-C sites might provide more contributions to activate PMS compared with ***,the degradation parameters,including pH and MOF-AEP dosage,were ***,radical quenching experiments and electron paramagnetic resonance(EPR)measurements revealed that ^(1)O_(2)might be the primary catalytic species,whereas·O~(2-)might be the secondary one in degrading MB.

关键词： advanced oxidation process alcohol solvent evaporation hydrogen bond S and Co co-doped carbon catalysts wastewater remediation

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The Chinese Philosopher and English Cosmopolitanism in the 18th Century

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学术界 2018年第11期 228-237页

作者： liu xiaoguang Heilongjiang Science and Technology University

Due to its construction of an image of modern Chinese philosopher who comments and reflects on what he has seen in England in comparison to China,Oliver Goldsmith’s The Citizen of the World(1760)has contradictorily been interpreted in two ways:One considers it as an orientalist discourse denigrating Chinese culture,while the other takes is as an utopian fabrication idealizing Chinese ***“difference”between English and Chinese cultures is the underlying logic of these two types of *** the contrary,rooting on the“sameness”between them,this essay offers a new understanding about The Citizen of the World through a close textual *** aim is to demonstrate how The Citizen of the World makes use of the image of Chinese philosopher to represent English cosmopolitanism featured with“polite”and“universal”and how the principle of equality operates through English cosmopolitanism.

关键词： cosmopolitanism cosmopolite Oliver Goldsmith Chinoiserie

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Effect of Interstitial Hydrogen on Cohesive Strength of Al Grain Boundary with Mg Segregation

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Journal of Materials Science & Technology 2006年第1期22卷 135-138页

作者： xiaoguang liu Xiaowei WANG Jingyang WANG Hongyan ZHANG Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of SciencesShenyang 110016 China International Centre for Materials Physics Institute of Metal Research Chinese Academy of SciencesShenyang 110016 China Dept. of MIME University of Toledo Toledo OH 43606 USA

The effect of interstitial hydrogen on the cohesion of the Al ∑ =11（113） grain boundary （GB） is investigated based on the thermodynamic model of Rice-Wang using the first-principles density tunction calculation. I he results indicate that interstitial H behaves as an embrittler from ＂strengthening energy＂ analysis. The reduced GB cohesion due to the presence of H at the GB is attributed to the low affinity between H and Al, and the weakened bonding of Al atomic pairs perpendicular to GB plane.

关键词： Hydrogen Grain boundary Al-Mg alloys

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Regional ecosystem health assessment using the GA-BPANN model:a case study of Yunnan Province,China

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Ecosystem Health and Sustainability 2022年第1期8卷 357-369页

作者： Yuze Li Yuanxiang Wu xiaoguang liu School of Architecture Harbin Institute of TechnologyKey Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and TechnologyMinistry of Industry and Information TechnologyHarbinHeilongjiangChina

Background:Regional ecosystem health assessments are the basis for the sustainable development of ***,an ecosystem is a complex integration of ecosystem mosaics and subsystems that influence each other,making it difficult to evaluate them using traditional assessment methods of linear and explicit *** introduce a back-propagation neural network model optimized by a genetic algorithm to evaluate ecosystem health in 16 districts in Yunnan ***:(1)The model required fewer inputs to evaluate complex and nonlinear systems,avoided the need for subjective weights,and performed well in this practical application to regional ecosystem health assessment.(2)The ecosystem health in Yunnan Province was increasing,and there was a significant positive spatial autocorrelation during 2000-2020,showing that districts with high Ecosystem Health cluster together and the ecological protection policy of the region has produced a diffusion effect,leading to continuous improvement of the ecological health of the surrounding ***-low outlier areas of ecosystem health should be paid more attention,because of the increasing instability of local health ***:This study provides a methodological exploration for assessing spatial mosaics of different ecosystems at a regional scale.

关键词： Neural network model regional ecosystem health assessment Yunnan province

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2018-2019 China macroeconomic report:China’s macroeconomy in the new chapter of reform and opening-up

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Economic and Political Studies 2019年第3期7卷 233-280页

作者： Yuanchun liu xiaoguang liu School of Economics Renmin University of ChinaBeijingChina National Academy of Development and Strategy Renmin University of ChinaBeijingChina

Since 2016,the scenario of stable macroeconomic performance with good momentum has changed due to shifts in global economic architecture,changes in market sentiment,variations in microeconomic bases and mismatched economic *** macroeconomic indicators demonstrated‘continuous slower growth’as downward pressure continued to *** situation illustrates that China’s macroeconomy has neither stabilised nor entered a steady recovery cycle.A short-term policy may fail to stabilise growth and alleviate the continuous downturn pressure which emerged in *** economy needs comprehensive supply-side structural reforms and *** report shows that China’s internal and external pressures urged wide-range reforms in 2018 and in-depth opening-up in *** year 2019 is crucial for China as it transitions from the dismal‘new normal’phase to a high-quality development mode.

关键词： Chinese economy reform and opening-up highquality development

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China macroeconomic report 2021:China’s macroeconomy marches towards normalisation

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Economic and Political Studies 2021年第4期9卷 379-416页

作者： xiaoguang liu Yuanchun liu Yan Yan National Academy of Development and Strategy Renmin University of ChinaBeijingChina School of Economics Renmin University of ChinaBeijingChina China Chengxin International Credit Rating Company Limited(CCXI) BeijingChina

In the year 2021,China’s economy continues to recover and moves towards policy *** report identifies features indicating the beginning of China’s macroeconomic normalisation,the internal and external pressure it faces,and the supporting *** to the economic recovery and the base effect,China’s real GDP growth rate is projected to reach above 8.0%in 2021,and the quarterly growth rate will drop from 18.3%in Q1 to 5.0%in Q4,showing a declining *** on qualitative assessments and statistical forecasts,this report puts forward some policy suggestions.

关键词： China’s macroeconomy COVID-19 economic recovery growth analysis

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Properties of Continental Margin and its Hydrocarbon Exploration Significance in Cambrian in the Southern Ordos Kratogen of North China

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Acta Geologica Sinica(English Edition) 2013年第3期87卷 777-803页

作者： BAI Yunlai MA Yuhu HUANG Yong LIAO Jianbo liu xiaoguang Northwest Branch of Research Institute of Petroleum Exploration and Development (NWGI) PetroChina School of Earth-Sciences and Resources China University of Geosciences (Beijing) The 107 Geological Team Bureau of Geology and Mineral Resources of Chongqing City

It is important to determine the properties of the tectonics in Cambrian period for the sake of prospecting deep hydrocarbon in the near future in the southern Ordos Kratogen of North China. Authors chose the marginal areas of the southern Ordos basin as the object of research, avoided the effects of both the Qinling Orogenic Belts （QOB） and Weihe River Graben （WRG） whose geological structures are too complicated. By surveying typical Cambrian outcrops and profdes in the basin edges and based on the cores of 57 wells which penetrated the Cambrian in the basin, combined with the seismic profiles, the field gammaray measuement results and the carbon isotope analysis, Authors conclude that the southern margin of the Ordos Kratogen during Cambrian was a passive continental margin which resulted from sea-floor spreading of the Ancient Qinling Ocean. Epicontinental sea carbonate sediments formed in the south Ordos continental margin during Cambrian, and were predominant as tidal flat and o61itic shoal. Both transgression-regression process and the change in palaeostructure have the obvious cyclicity. Using the junction between the late Nangao age of Qiandong epoch and the early Duyun age of Qiandong epoch as a boundary, each had a full transgression cycle at the upper and lower stages. The early cycle is characterized by high energy clastic littoral facies while the late cycle is characterized by carbonate ramp on which clear water and muddy water developed alternately changing to carbonate platform last. During the early stages, An aulacogen was formed in the middle section of the southern margin. The southern Ordos margin was uplifted and denudated by the Huaiyuan Movement which occurred from the late Furongian age to the middle Flolan age and the history of the passive continental margin ended and entering into a new tectonic cycle. The unconformity surface caused by the Huaiyuan Movement, along with its neighborhood areas where dissolved pores and cavities are develop

关键词： the Southern Ordos Kratogen Passive continental margin Cambrian deep hydrocarbon exploration

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Electronic regulation to achieve efficient anaerobic digestion of organic fraction of municipal solid waste(OFMSW):strategies,challenges and potential solutions

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Frontiers of Environmental Science & Engineering 2024年第4期18卷 159-165页

作者： Yongdong Chen Hong Wang Parisa Ghofrani-Isfahani Li Gu xiaoguang liu Xiaohu Dai State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Tongji UniversityShanghai 200092China Department of Chemical and Biochemical Engineering Technical University of DenmarkKgs Lyngby DK-2800Denmark College of Environment and Ecology Chongqing UniversityChongqing 400045China

Anaerobic digestion(AD)of organic fraction of municipal solid waste(OFMSW)is prone to system breakdown under high organic loading rates(OLRs)condition,which subsequently reduces the efficiency of digestion process and results in substantial economic *** this perspective paper,the substances metabolisms,electrons flow,as well as microbial interaction mechanisms within AD process are comprehensively discussed,and the underlying bottleneck that causes inefficient methane production is identified,which is“electrons surplus”.Systems encountering severe electron surplus are at risk of process failure,making it crucial to proactively prevent this phenomenon through appropriate *** this basis,the present perspective proposes three potential electronic regulation strategies to prevent electrons surplus,namely,electron shunt,accelerating electron transfer and regulating methanogenic metabolism pathway,and presents specific methodologies for each ***,the potential solutions to challenges that may occur during the electronic regulation process are also presented in this *** perspective aims to provide innovative approaches to achieve the efficient and stable operation of OFMSW anaerobic digestion,especially under high OLRs condition.

关键词： Anaerobic digestion Electrons surplus Electronic regulation Electrons shunt Electron transfer Methanogenic metabolism pathway

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China macroeconomic report 2020: China’s macroeconomy is on the rebound under the impact of COVID-19

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Economic and Political Studies 2020年第4期8卷 395-435页

作者： xiaoguang liu Yuanchun liu Yan Yan National Academy of Development and Strategy Renmin University of ChinaBeijingP.R.China School of Economics Renmin University of ChinaBeijingP.R.China China Chengxin International Credit Rating Company Limited(CCXI) BeijingP.R.China

The year 2020 is bound to be a very special year in the history ofChina’s and the world’s economy. The sudden onslaught ofCOVID-19 has taken a heavy toll on China’s macroeconomy andits market participants. Also, the global economic and trade system has tipped into the most severe downturn since World WarII. The macro stimulus policy packages launched by various countries are of an epic scale, in a way rarely seen before. China wasthe first to be hit by the epidemic, to contain the epidemic, andto resume work and production. China’s economic recovery andreconstruction are of landmark and leading significance for theglobal economy. The content of this report mainly includes thefollowing two aspects: one is to forecast the basic trend andrecovery potential of China’s economy under the impact of theepidemic;the other is to provide applicable policy recommendations for post-epidemic economic rehabilitation and its mid- tolong-term development. We focus on four issues: the progressand nature of China’s economic recovery at the current stage;major challenges and risks facing China’s economic recovery inthe next stage;how to design policies of a sizable scale and policy mechanisms to achieve desired effects;and whether the existing policy is sufficient to cope with various risks and challenges,to enhance resilience and re-consolidate economic foundations. Inview of this, the report presents the forecast and prospect ofChina’s core macroeconomic indicators in 2020 and puts forwardpolicy recommendations accordingly.

关键词： China’s macroeconomy COVID-19 epidemic economic recovery macro control

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High production of butyric acid by Clostridium tyrobutyricum mutant

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Frontiers of Chemical Science and Engineering 2015年第3期9卷 369-375页

作者： Chao Ma Jianfa Ou Matthew Miller Sarah McFann xiaoguang (Margaret) liu Department of Chemical and Biological Engineering The University of Alabama 245 7th Avenue Tuscaloosa AL 35401 USA

The objective of this study was to improve the production of butyric acid by process optimization using the metabolically engineered mutant of Clostridium tyrobutyricum （PAK-Em）. First, the free-cell fermentation at pH 6.0 produced butyric acid with concentration of 38.44 g/L and yield of 0.42 g/g. Second, the immobilized- cell fermentations using fibrous-bed bioreactor （FBB） were run at pHs of 5.0, 5.5, 6.0, 6.5 and 7.0 to optimize fermentation process and improve the butyric acid production. It was found that the highest titer of butyric acid, 63.02g/L, was achieved at pH 6.5. Finally, the metabolic flux balance analysis was performed to inves- tigate the carbon rebalance in C. tyrobutyricum. The results show both gene manipulation and fermentation pH change redistribute carbon between biomass, acetic acid and butyric acid. This study demonstrated that high butyric acid production could be obtained by integrating metabolic engineering and fermentation process optimization.

关键词： Clostridium tyrobutyricum butyric acid production fermentation mutant pH flux balance analysis

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