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Insight into the synergistic effect of defect and strong interface coupling on ZnIn_(2)S_(4)/CoIn_(2)S_(4)heterostructure for boosting photocatalytic H_(2) evolution

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Journal of Energy Chemistry 2024年第5期92卷 151-161页

作者： xuehua Wang Tianyu Shi Xianghu Wang Aili Song Guicun li Lei Wang Jianfeng Huang Alan Meng Zhenjiang li College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina Key Laboratory of Optic-electric Sensing and Analytical Chemistry for life Science MOECollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042ShandongChina Qingdao Huanghai University Qingdao 266000ShandongChina School of Material Science and Engineering International S&T Cooperation Foundation of Shaanxi ProvinceXi’an Key Laboratory of Green Manufacture of Ceramic MaterialsShaanxi University of Science and TechnologyXi’an 710021ShaanxiChina

Steering the directional carrier migration across the interface is a central mission for efficient photocatalytic reactions.In this work,an atomic-shared heterointerface is constructed between the defect-rich ZnIn_(2)S_(4)(HVs-ZIS)and CoIn_(2)S_(4)(CIS)via a defect-guided heteroepitaxial growth strategy.The strong interface coupling induces adequate carriers exchanging passageway between HVs-ZIS and CIS,enhancing the internal electric field(IEF)in the ZnIn_(2)S_(4)/CoIn_(2)S_(4)(HVs-ZIS/CIS)heterostructure.The defect structure in HVs-ZIS induces an additional defect level,improving the separation efficiency of photocarriers.Moreover,promoted by the IEF and intimate heterointerface,photogenerated electrons trapped by the defect level can migrate to the valence band of CIS,contributing to massive photogenerated electrons with intense reducibility in HVs-ZIS/CIS.Consequently,the HVs-ZIS/CIS heterostructure performs a boosted H_(2)evolution activity of 33.65 mmol g^(-1)h^(-1).This work highlights the synergistic effects of defect and strong interface coupling in regulating carrier transfer and paves a brave avenue for constructing efficient heterostructure photocatalysts.

关键词： Defect-guided heteroepitaxial growth Heterointerface coupling Photocatalytic H_(2)evolution Mechanism HVs-ZIS/CIS

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Facile preparation and efficient MnxCoy porous nanosheets for the sustainable catalytic process of soot

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Green Energy & Environment 2024年第3期9卷 516-528页

作者： Miaomiao Hu Kun Zhou Tingyi Zhao Zheng li Xianhai Zeng Di Yu xuehua Yu Mingqin Zhao Zhihui Shao Qixiang Xu Bing Cui Flavors and Fragrance Engineering&Technology Research Center of Henan Province College of Tobacco ScienceHenan Agricultural UniversityZhengzhou450002China School of Ecology and Environment Zhengzhou UniversityZhengzhou450001China College of Energy Xiamen UniversityXiamen361102China College of Chemistry and Chemical Engineering Shenyang Normal UniversityShenyang110034China

The pursuit of high-performance is worth considerable effort in catalysis for energy efficiency and environmental sustainability. To develop redox catalysts with superior performance for soot combustion, a series of Mn_(x)Co_(y) oxides were synthesized using MgO template substitution.This method greatly improves the preparation and catalytic efficiency and is more in line with the current theme of green catalysts and sustainable development. The resulting Mn_(1)Co_(2.3) has a strong activation capability of gaseous oxygen due to a high concentration of Co^(3+) and Mn^(3+). The Mn doping enhanced the intrinsic activity by prompting oxygen vacancy formation and gaseous oxygen adsorption. The nanosheet morphology with abundant mesoporous significantly increased the solid–solid contact efficiency and improved the adsorption capability of gaseous reactants. The novel design of Mn_(1)Co_(2.3)oxide enhanced its catalytic performance through a synergistic effect of Mn doping and the porous nanosheet morphology, showing significant potential for the preparation of high-performance soot combustion catalysts.

关键词： Soot combustion Intrinsic activity Contact efficiency Mn doping DFT

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Failure laws of narrow pillar and asymmetric control technique of gob-side entry driving in island coal face

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International Journal of Mining Science and Technology 2013年第2期23卷 271-276页

作者： Yang Jiping Cao Shenggen li xuehua School of Mines China University of Mining & Technology Shenhua Wuhai Coal Group Corporation limited

In allusion to the problems of complex stress distribution in the surrounding rock and deformation failure laws, as well as the difficulty in roadway supporting of the gob-side entry driving in the island coal face, 2107 face in Chengjiao Colliery is researched as an engineering case. Through physical mechanical test of rock, theoretical and numerical simulation analyses of rock, the analysis model of the roadway overlying strata structure was established, and its parameters quantified. To reveal the deformation law of the surrounding rock, the stability of the overlying strata structure was studied before, during and after the roadway driving. According to the field conditions, the stress distribution in coal pillar was quantified, and the surrounding rock deformation feature studied with different widths of the pillars in gob-side entry driving. Finally, the pillar width of 4 m was considered as the most reasonable. The research results show that there is great difference in support conditions among roadway roof, entity coal side and narrow pillar side. Besides, the asymmetric control technique for support of the surrounding rock was proposed. The asymmetric control technique was proved to be reasonable by field monitoring, support by bolt-net, steel ladder and steel wire truss used in narrow pillar side.

关键词： Island coal face Gob-side entry driving Narrow pillar Asymmetric control

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Moment tensor analysis of transversely isotropic shale based on the discrete element method

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International Journal of Mining Science and Technology 2017年第3期27卷 507-515页

作者： Chong Zhaohui li xuehua Hou Peng Chen Xiangyu Wu Yuechao Key Laboratory of Deep Coal Resource Mining Ministry of Education of China School of Mines China University of Mining & Technology Xuzhou 221116 China Faculty of Engineering and Information Sciences University of Wollongong Wollongong 2522 Australia State Key Laboratory for Geomechanics Deep Underground Engineering China University of Mining & Technology Xuzhou 221116 China

In this study,the moment tensor of transversely isotropic shale was analyzed using a discrete element method-acoustic emission model(DEM-AE model).Firstly,the failure modes of the shale obtained from the acoustic emission(AE) events and physical experiments were compared.Secondly,the relationships between AE events and seismic magnitudes,and AE events and the resulting cracks were analyzed.Finally,a moment tensor T-k chart describing the seismic source was introduced to demonstrate the differences in the transversely isotropic shale.The results showed that,for different anisotropy angles,a linear logarithmic relationship existed between the cumulative AE events and the seismic magnitude in the concentration area of the AE events.A normal distribution was observed for the number of AE events as the seismic magnitude changed from small to large.The moment tensor T-k chart indicated that the number and proportion of linear tension cracks in the shale were highest.When θ = 30°,the peak seismic magnitude was at a minimum.The average seismic magnitude in the concentration area of the AE events was also relatively small.Points close to the U=-1/3V line and the number of cracks included in a single AE event were at a minimum,and the corresponding peak stress also reached its lowest level.In contrast,when θ=90°,all related parameters were contrary to the above θ = 30° case.The DEM-AE model and the moment tensor T-k chart are suitable for analyzing the distribution of shale cracks appearing during the loading process.This study can provide constructive references for future research on the fracturing treatment of shale.

关键词： Bedding plane of shale AE events Failure mode Moment tensor T-k chart Crack type

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Progress and perspectives of quantitative structure-activity relationships used for ecological risk assessment of toxic organic compounds

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Science China Chemistry 2008年第7期51卷 593-606页

作者： CHEN JingWen li xuehua YU HaiYing Key Laboratory of Industrial Ecology and Environmental Engineering (MOE) Department of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China

Structure-activity relationship (SAR) and quantitative structure-activity relationship (QSAR), collec- tively referred to as (Q)SARs, play an important role in ecological risk assessment (ERA) of organic chemicals. (Q)SARs can fill the data gap for physical-chemical, environmental behavioral and ecotoxicological parameters of organic compounds; they can decrease experimental expenses and reduce the extent of experimental testing (especially animal testing); they can also be used to assess the uncertainty of the experimental data. With the development for several decades, (Q)SARs in envi- ronmental sciences show three features: application orientation, multidisciplinary integration, and in- telligence. Progress of (Q)SAR technology for ERA of toxic organic compounds, including endpoint selection and mathematic methods for establishing simple, transparent, easily interpretable and portable (Q)SAR models, is reviewed. The recent development on defining application domains and diagnosing outliers is summarized. Model characterization with respect to goodness-of-fit, stability and predictive power is specially presented. The purpose of the review is to promote the development of (Q)SARs orientated to ERA of organic chemicals.

关键词： (Q)SARs ecological risk assessment application domain stability predictive power

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Time-domain characteristics of overlying strata failure under condition of longwall ascending mining

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International Journal of Mining Science and Technology 2013年第2期23卷 216-220页

作者： liang Shun li xuehua Mao Yanxin li Chengjun School of Mines China University of Mining & Technology State Key Laboratory of Coal Resource and Mine Safety China University of Mining & Technology Coal and Electricity of Anhui Hengyuan Co. Ltd.

Ascending mining is one of the most effective ways to solve problems of water inrush, gas outburst and rock burst in coal seams mining. In order to reveal the law of motion and spatiotemporal relationship of overlaying strata, field measurement has been done in a mine. Long distance drillings were constructed from 4# coal seam to 6# coal seam at several certain typical positions, and movement and failure law of overlying strata after mining was analyzed by drilling video and observing the fluid leakage. Besides, we also analyzed the spatiotemporal development law of overlying strata failure with different mining heights and time intervals in the lower coal seam. The results show that: ascending mining is significantly affected by time-domain characteristics of overlaying strata failure after the lower coal seam's mining, height equations of caving zone and fractured zone are given in this paper, and the feasibility of ascending mining was compartmentalized concretely according to the spatiotemporal relationship. Research methods and conclusions of this paper have certain referential significance for the study of ascending mining, mining under water, mining under building, mining under railway and stress-relief mining.

关键词： Ascending mining Overlying strata failure Time-domain characteristics Strata control

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Prediction of rock-burst-threatened areas in an island coal face and its prevention:A case study

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International Journal of Mining Science and Technology 2016年第6期26卷 1125-1133页

作者： li xuehua Pan Fan li Huaizhen Zhao Min Ding lingxiao Zhang Wenxi School of Mines China University of Mining and Technology State Key Laboratory of Deep Coal Resource Mining China University of Mining and TechnologyXuzhou School of Energy Science and Engineering Henan Polytechnic University

The island coal face arises in coal mines with the purpose of preventing gas explosion or maintaining the balance between mining and tunneling. However, its particular stress conditions in the surrounding rock may increase the difficulty of stress control in the coal face and in its mining roadways, especially when the coal seam, the roof, and the floor have rock-burst propensities. The high energy accumulated in the island coal face and in its roof and floor will intensify rock-burst propensity or even induce rock burst,which further result in great casualties and financial losses. Taking island coal face 2321 in Jinqiao coal mine as a case, we propose a method for the prediction of rock-burst-threatened areas in an island coal face with weak rock-burst propensity. Based on the analysis of the movement of the overlying roof and characteristics of stress distribution, this method combined numerical simulation with drilling bits to ensure the prediction accuracy. The effects of coal pillars with different widths on the mitigation of stress concentration in the coal face and on the prevention of rock burst are analyzed together with the mechanism behind. Finally, corresponding measures against the rock burst in the island coal face are proposed.

关键词：孤岛工作面采煤工作面危险区预测岩爆实例防治数值模拟方法瓦斯爆炸

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环境公平视角下基于“全碳”核算的中国省级碳效率评价

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科技管理研究 2024年第9期44卷 202-214页

作者：张雪花李婉玥天津工业大学经济与管理学院天津300387

突破以能源消耗碳排放为主的“传统碳”核算的局限,将废弃物排放、生物质资源消耗、电力净输入和森林固碳情况也纳入评价范畴,利用上述指标间的自然能量联系,进行中国各省份“全碳”核算,进而开展基于碳足迹的直接碳效率评价和基于DEA-... 详细信息

突破以能源消耗碳排放为主的“传统碳”核算的局限,将废弃物排放、生物质资源消耗、电力净输入和森林固碳情况也纳入评价范畴,利用上述指标间的自然能量联系,进行中国各省份“全碳”核算,进而开展基于碳足迹的直接碳效率评价和基于DEA-BCC模型的全要素碳效率评价。研究结果表明:(1)2016至2020年,中国大部分省份的直接碳效率明显上升,但全要素碳效率却有所下降。“双碳”背景下,相比其他生产资料,碳环境容量日益稀缺,因此全要素碳效率不升反降的现象应引起重视。(2)在“全碳”与“传统碳”两种核算体系下,直接碳效率和全要素碳效率的评价结果均存在差异,而且在2020年尤为明显。减污降碳是同根同源问题,能源电力安全是经济发展的重要保障,在此背景下,“全碳”效率的评价结果的解释性更强,其可以更加全面地反映各省份的低碳水平及发展潜力,并为厘清区域间碳减排责任和制定碳综合决策提供一种新思路。

关键词： “全碳”核算直接碳效率全要素碳效率 DEA-BCC模型

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党组织嵌入公司治理对高管—员工薪酬差距的影响研究

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西南大学学报（社会科学版） 2024年第2期50卷 143-155页

作者：夏雪花李佳奇南京财经大学会计学院江苏南京210023 西南大学经济管理学院重庆400715

收入分配制度的合理性是保障社会公平与正义的关键。然而,随着高管薪酬对企业绩效的作用逐渐凸显,高管薪酬不断提高致使高管“天价薪酬”成为普遍现象,引起理论界和实务界的广泛关注。基于我国特殊的公司治理制度,以2010-2021年我国沪深... 详细信息

收入分配制度的合理性是保障社会公平与正义的关键。然而,随着高管薪酬对企业绩效的作用逐渐凸显,高管薪酬不断提高致使高管“天价薪酬”成为普遍现象,引起理论界和实务界的广泛关注。基于我国特殊的公司治理制度,以2010-2021年我国沪深A股上市公司为研究样本对党组织嵌入公司治理是否影响以及如何影响高管—员工薪酬差距进行研究,发现党组织融嵌公司治理有助于抑制高管—员工薪酬差距,而且党组织融嵌程度越高,对高管—员工薪酬差距的抑制作用越强;此外,这种抑制作用对国有企业、董事长或总经理无政治关联、市场化程度低的企业更显著;进一步分析发现,党组织嵌入公司治理可以通过抑制管理层权力的扩大和降低企业风险进而抑制高管—员工薪酬差距。从中国特色的党组织嵌入公司治理视角探讨高管—员工薪酬差距的影响因素以及作用机制,对于丰富薪酬差距影响因素研究和党组织嵌入公司治理效应研究方面的文献,加强党组织建设、全面促进党组织建设与公司治理结构的有机结合、优化收入分配制度改革具有借鉴意义。

关键词：党组织嵌入高管—员工薪酬差距收入分配管理层权力企业风险承担水平

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包覆型缓释氧化剂的制备及其缓释性能评价

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环境工程学报 2024年第4期18卷 1044-1055页

作者：李凡申佳张雪花唐智超阮秀秀上海大学环境与化学工程学院上海市200444

在低渗层非水相液体污染物的原位化学氧化修复过程中,土壤有机质会消耗氧化剂,导致氧化剂的有效浓度难以长期维持,从而使污染物浓度容易反弹。为了解决该问题采用硬脂酸作为壳材,通过相分离法包覆高锰酸钾制备缓释氧化材料。结果表明,... 详细信息

在低渗层非水相液体污染物的原位化学氧化修复过程中,土壤有机质会消耗氧化剂,导致氧化剂的有效浓度难以长期维持,从而使污染物浓度容易反弹。为了解决该问题采用硬脂酸作为壳材,通过相分离法包覆高锰酸钾制备缓释氧化材料。结果表明,硬脂酸包覆型高锰酸钾(PP@SA)具有良好的缓释性能,可以持续缓释120 h以上。正交实验结果显示,当芯壳比为1∶3,超声时间为15 min,搅拌速度为300 r·min^(-1),粒径为1.12~4.00 mm时缓释效果最佳。并且,随着PP@SA的粒径和硬脂酸用量的增大,MnO4-的缓释机制从Fickian扩散模式向骨架溶蚀和Fickian扩散混合释放机制转变,其中骨架溶蚀释放机制逐渐起主导作用。此外,土相缓释柱实验结果表明,PP@SA在淤泥质粘土和粉质粘土两种低渗土壤中可以保持高锰酸根离子的扩散浓度在0.25 g·L^(-1)以上的时间分别为7和9d,其缓释寿命远超过原高锰酸钾。

关键词：原位化学氧化缓释高锰酸钾低渗土壤

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