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Highly Efficient Photoelectrocatalytic Reduction of CO2 to Methanol by a p–n Heterojunction CeO2/CuO/Cu Catalyst

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Nano-Micro Letters 2020年第2期12卷 34-46页

作者： Zhengbin Pan Ershuan Han Jingui Zheng Jing Lu Xiaolin wang Yanbin Yin Geoffrey INWaterhouse xiuguo wang Peiqiang Li Tobacco Research Institute of Chinese Academy of Agricultural Sciences(CAAS) Qingdao 266101People’s Republic of China College of Chemistry and Material Science Shandong Agricultural UniversityTai’an271018People’s Republic of China School of Chemical Sciences The University of AucklandAuckland 1142New Zealand

Photoelectrocatalytic reduction of CO2 to fuels has great potential for reducing anthropogenic CO2 emissions and also lessening our dependence on fossil fuel ***,we report the successful development of a novel photoelectrocatalytic catalyst for the selective reduction of CO2 to methanol,comprising a copper catalyst modified with flower-like cerium oxide nanoparticles(CeO2 NPs)(a n-type semiconductor)and copper oxide nanoparticles(CuO NPs)(a p-type semiconductor).At an applied potential of−1.0 V(vs SCE)under visible light irradiation,the CeO2 NPs/CuO NPs/Cu catalyst yielded methanol at a rate of 3.44μmol cm^−2 h^−1,which was approximately five times higher than that of a CuO NPs/Cu catalyst(0.67μmol cm^−2 h^−1).The carrier concentration increased by^108 times when the flower-like CeO2 NPs were deposited on the CuO NPs/Cu catalyst,due to synergistic transfer of photoexcited electrons from the conduction band of CuO to that of CeO2,which enhanced both photocatalytic and photoelectrocatalytic CO2 reduction on the CeO2 *** facile migration of photoexcited electrons and holes across the p–n heterojunction that formed between the CeO2 and CuO components was thus critical to excellent light-induced CO2 reduction properties of the CeO2 NPs/CuO NPs/Cu *** encourage the wider application of composite semiconductor electrodes in carbon dioxide reduction.

关键词： CO2 reduction Photoelectrocatalysis p–n heterojunction Cerium oxide Copper oxide

Gut pathobiome mediates behavioral and developmental disorders in biotoxin-exposed amphibians

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Environmental Science and Ecotechnology 2024年第5期21卷 208-218页

作者： Qianqian Pan Tianxing Lv Haorong Xu Hongda Fang Meng Li Jiaping Zhu Yue wang Xiaoyan Fan Ping Xu xiuguo wang Qiangwei wang Haruna Matsumoto Mengcen wang Ministry of Agricultural and Rural Affairs Laboratory of Molecular Biology of Crop Pathogens and Insects Zhejiang UniversityHangzhou310058China Institute of Pesticide and Environmental Toxicology College of Agriculture and BiotechnologyZhejiang UniversityHangzhou310058China Institution of Tea Science Zhejiang UniversityHangzhou310058China The Tobacco Research Institute Chinese Academy of Agricultural SciencesQingdao266101China Global Education Program for AgriScience Frontiers Graduate School of AgricultureHokkaido UniversitySapporoJapan

Emerging evidence suggests a link between alterations in the gut microbiome and adverse health outcomes in the hosts exposed to environmental ***,the causal relationships and underlying mechanisms remain largely *** we show that exposure to biotoxins can affect gut pathobiome assembly in amphibians,which in turn triggers the toxicity of exogenous *** used Xenopus laevis as a model in this *** exposed to tropolone demonstrated notable developmental impairments and increased locomotor activity,with a reduction in total length by 4.37%e22.48%and an increase in swimming speed by 49.96%e84.83%.Fusobacterium and Cetobacterium are predominant taxa in the gut pathobiome of tropolone-exposed *** tropolone-induced developmental and behavioral disorders in the host were mediated by assembly of the gut pathobiome,leading to transcriptome *** study not only advances our understanding of the intricate interactions between environmental pollutants,the gut pathobiome,and host health but also emphasizes the potential of the gut pathobiome in mediating the toxicological effects of environmental contaminants.

关键词： Gut microbiome Pathobiome Biotoxin pollution Developmental toxicity Behavioral disorders

Carbendazim induces a temporary change in soil bacterial community structure

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维普期刊数据库

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Journal of Environmental Sciences 2009年第12期21卷 1679-1683页

作者： wang xiuguo, SONG Min, GAO Chunming, DONG Bin, ZHANG Qun, FANG Hua, YU Yunlong Department of Plant Protection, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, China. [a] Department of Plant Protection College of Agriculture Biotechnology Zhejiang University Hangzhou 310029 China

The effect of carbendazim applications on the diversity and structure of a soil bacterial community was studied under field conditions using temperature gradient gel electrophoresis （TGGE） and partial sequence analysis of PCR-amplified 16S rRNA gene. After four successive introductions of carbendazim at a level of 0.94 kg active ingredient （a.i.）/ha, the genetic diversity （expressed as Shannon index, H′） decreased from 1.43 in the control to 1.29 in treated soil. This harmful effect seems to increase with the concentration of carbendazim. The value of H＇ in the soil treated with carbendazim at 4.70 kg a.i./ha was reduced to 1.05 （P ≤ 0.05）. The structure of soil bacterial community was also affected after four repeated applications of carbendazim at levels of 0.94, 1.88 and 4.70 kg a.i./ha, as seen in the relative intensities of the individual band. However, the bacterial community in carbendazim-treated soil recovered to that in the control 360 d after the first treatment. The results indicated that repeated applications of carbendazim could reduce soil microbial diversity and alter the bacterial community structure temporarily.

关键词： carbendazim bacterial diversity temperature gradient gel electrophoresis phylogenetic analysis

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基于随机基准的三基金定理动态决策模型

北京化工大学学报（自然科学版） 2007年第4期34卷 441-445页

作者：王秀国周荣喜中央财经大学应用数学学院北京100081 北京化工大学经济管理学院北京100029

在Black-Scholes型金融市场下,通过一个随机过程来定义基准,以低于基准的不足概率作为风险约束,以最大化期望相对终端财富为决策目标,构建了动态投资组合决策模型,并给出了最优投资策略和有效前沿的显式表达式。结果表明:最优投资策略... 详细信息

在Black-Scholes型金融市场下,通过一个随机过程来定义基准,以低于基准的不足概率作为风险约束,以最大化期望相对终端财富为决策目标,构建了动态投资组合决策模型,并给出了最优投资策略和有效前沿的显式表达式。结果表明:最优投资策略由无风险资产,修正的市场组合及“基准组合”构成,可视为三基金定理。最后给出了数值例子。

关键词：动态投资组合随机过程基准不足概率三基金定理

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利用煤炭间接液化技术改造中小型氮肥厂

中国煤炭 2008年第11期34卷 82-83页

作者：王秀国兖矿集团煤化公司企业管理处

介绍了我国中小型氮肥厂的现状;阐述了利用油—氨联合生产技术,对中小型氮肥厂进行技术改造的可行性和必要性。

关键词：煤炭间接液化技术改造

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安全第一准则下的动态投资组合

管理评论 2010年第12期22卷 20-27页

作者：王秀国周荣喜中央财经大学应用数学学院北京100081 北京化工大学经济管理学院北京100029

在Black-Scholes型金融市场下,研究了三种安全第一准则意义下的动态投资组合问题,利用非线性规划理论,给出了最优投资策略的显式表达式。结果表明最优投资策略符合两基金定理,即由无风险资产和市场组合构成。并结合数值例子,在均值-方... 详细信息

在Black-Scholes型金融市场下,研究了三种安全第一准则意义下的动态投资组合问题,利用非线性规划理论,给出了最优投资策略的显式表达式。结果表明最优投资策略符合两基金定理,即由无风险资产和市场组合构成。并结合数值例子,在均值-方差框架下分析了三种准则的联系和经济意义。

关键词：安全第一准则动态投资组合两基金定理

甲醇生产需求现状及合成氨联产甲醇的发展模式探讨

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中国煤炭 2008年第7期34卷 82-85页

作者：韩梅王秀国兖矿集团煤化公司

介绍了合成氨联产甲醇的必要性和技术基础,分析了国内外甲醇生产现状和消费需求,在此基础上探讨了合成氨联产甲醇的发展模式。

关键词：甲醇合成氨联产模式

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基于股票期权定价熵模型的套期保值参数研究

北京化工大学学报（自然科学版） 2009年第2期36卷 100-104页

作者：周荣喜王秀国北京化工大学经济管理学院北京100029 中央财经大学应用数学学院北京100081

基于股票期权定价熵模型,本文给出了一套平行于Black-Scholes期权定价模型(BS模型)的套期保值参数的定义及其计算公式,并与BS模型框架下的套期保值参数进行了相应的数值模拟比较与分析。结果表明:熵模型套期保值参数的灵敏度要大于BS模... 详细信息

基于股票期权定价熵模型,本文给出了一套平行于Black-Scholes期权定价模型(BS模型)的套期保值参数的定义及其计算公式,并与BS模型框架下的套期保值参数进行了相应的数值模拟比较与分析。结果表明:熵模型套期保值参数的灵敏度要大于BS模型,从而为不完全市场中衍生产品风险管理提供了一种新途径。

关键词：期权定价熵模型 Black-Scholes模型套期保值参数数值模拟

基于修正Black-Scholes金融市场和下方风险测度的动态投资组合优化

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管理评论 2021年第3期33卷 14-28页

作者：王秀国伍慧玲中央财经大学统计与数学学院北京100081 中央财经大学中国精算研究院北京100081

在修正的Black-Scholes金融市场下,研究了基于CVaR和CCaR下方风险测度的连续时间投资组合优化问题.给出了最优投资策略和有效前沿的显式表达式,其中最优投资策略就是投资于无风险资产和一种“风险资产”等波动率投资组合的组合,可解释... 详细信息

在修正的Black-Scholes金融市场下,研究了基于CVaR和CCaR下方风险测度的连续时间投资组合优化问题.给出了最优投资策略和有效前沿的显式表达式,其中最优投资策略就是投资于无风险资产和一种“风险资产”等波动率投资组合的组合,可解释为两基金分离定理.如果投资者事先给出风险资产的风险暴露,则不需要估计期望收益率参数,投资者的最优投资策略就可以通过估计出的波动率矩阵确定出来,这有效地解决了传统投资组合优化的最优权重由于估计期望收益率所产生的敏感性问题.进一步,利用本文提出的分析方法研究了均值-方差模型的最优投资策略和有效前沿.最后,实证分析表明,与不受估计期望收益率影响的两种经典投资策略(等权重投资策略和最小方差投资策略)相比较,本文构建的最优投资策略的组合权重随时间是平稳的,并具有更好的业绩表现.

关键词：投资组合优化下方风险测度修正Black-Scholes金融市场投资策略有效前沿