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A small organic molecule strategy for remedying oxygen vacancies by bismuth defects in BiOBr nanosheet with excellent photocatalytic CO_(2)reduction

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Nano Research 2024年第1期17卷 297-306页

作者： Jing Xie Zhenjiang Lu Yue Feng jianguo huang Jindou Hu Aize Hao Yali Cao State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources College of ChemistryXinjiang UniversityUrumqi 830046China

Defect modulation currently plays a decisive role in addressing the poor photoabsorption,sluggish electron hole separation,and high CO_(2)activation barrier in photocatalytic CO_(2)***,hunting for a straightforward strategy to balance the concentration of oxygen vacancy and metal cation defect in one photocatalyst is still a great ***,a bismuth vacancies BiOBr nanosheets(BiOBr-1)on the exposed[001]facets were constructed via an acetic acid molecule modification strategy,which can repair oxygen defect by bismuth vacancy in low-temperature solid-state chemical *** from the formed bismuth defects that can not only broaden light absorption and elevate charge separation efficiency,but also enhance adsorption and activation of CO_(2)molecules,the evolution rates of photocatalytic CO_(2)conversion into CO(71.23μmol·g^(-1)·h^(-1))and CH4(8.90μmol·g^(-1)·h^(-1))attained by BiOBr-1 are superior 7.1 and 11 times to that of plate-like *** photocatalytic mechanisms including adsorption concentration and activation process of CO_(2)are further revealed by the in situ diffuse reflectance infrared flourier transform spectra(DRIFTS).This finding of the existence of distinct defects in ultrathin nanosheets undoubtedly leads to new possibilities for photocatalyst design using two-dimensional materials with high solar-driven photocatalytic activity.

关键词： solid-state synthesis BiOBr metal vacancies photocatalysis carbon dioxide reduction

Effects of biochar produced from distiller grains on agronomic performances of sorghum(Sorghum bicolor L.) and greenhouse gas emissions from soil

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Pedosphere 2024年第5期34卷 951-959页

作者： Hongjun YANG Suyi ZHANG Jingyu HU jianguo huang Zonghua AO Xiaoqin WANG Zhe LI Xuepin LIAO College of Resources and Environment Southwest University National Engineering Research Center of Solid-State Brewing Luzhou Laojiao Co.Ltd. College of Biomass Science and Engineering Sichuan University

Aromatic liquor breweries produce massive distiller grains containing a high percentage of rice husks that necessitate harmless treatment and resource utilization. These husk-rich distiller grains can be pyrolyzed in the Ni-based catalyst system at a relatively low temperature（480?C） into combustible gas,which is used in liquor distillation, and biochar（BDG） with high mineral nutrients and good surface properties. A 3-year field experiment（2018–2020） was established to understand the effects of BDG on sorghum agronomic performances and greenhouse gas emissions from the soil. The results showed that BDG had higher mineral nutrient（N, P, K, and S） contents, larger cation exchange capacity, and better surface structure than those prepared using the traditional method at 400 and 600?C. Compared with sole chemical fertilizer（CF）, the combination of CF and BDG（CF+BDG） increased sorghum nutrient（N, P, and K） uptake, yield, fertilizer use efficiency, and economic benefit. Cumulative CO2emission from the soil changed little between with and without BDG,indicating the microbial stability of BDG. The effective adsorption of NH3or NH4+by BDG upon N application may reduce N loss through NH3and N2O emissions and increase the efficiency of fertilizer N use. Cumulative CH4emission ranged from 32.45 to 44.86 g ha-1, which could be overlooked as a greenhouse gas in the sorghum field. Moreover, CF+BDG significantly decreased NH3and N2O emissions for the production of each unit of sorghum grains and the CO2emission from the land for the production of a certain amount of sorghum grains. Therefore, CF+BDG exhibited better agronomic and environmental performances in sorghum cultivation.

关键词： CO2 emission economic benefit environmental performance fertilizer use efficiency N2O emission NH3 emission nutrient uptake yield

Competing-risks model for predicting the prognosis of patients with regressive melanoma based on the SEER database

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Malignancy Spectrum 2024年第2期1卷 123-135页

作者： Chaodi huang Liying huang jianguo huang Xinkai Zheng Congjun Jiang Kong Ching Tom UTim Wu WenHsien Ethan huang Yunfei Gao Fangmin Situ Hai Yu Liehua Deng Jun Lyu Department of Dermatology The First Affiliated Hospital of Jinan University and Jinan University Institute of DermatologyGuangzhouGuangdongChina Department of Clinical Research The First Affiliated Hospital of Jinan UniversityGuangzhouGuangdongChina Department of Dermatology Huadu District People's Hospital of GuangzhouGuangzhouGuangdongChina Department of Dermatology The First Affiliated Hospital of Bengbu Medical CollegeBengbuAnhuiChina Primax Biotech Company Hong KongChina Meng Yi Centre Limited MacaoChina GeneHope Clinic TaipeiTaiwanChina Guangdong Provincial Key Laboratory of Tumor Interventional Diagnosis and Treatment Zhuhai Institute of Translational MedicineZhuhai People's Hospital Affiliated with Jinan UniversityZhuhaiGuangdongChina The Biomedical Translational Research Institute Faculty of Medical ScienceJinan UniversityGuangzhouGuangdongChina Department of Dermatology The Fifth Affiliated Hospital of Jinan UniversityHeyuanGuangdongChina Guangdong Provincial Key Laboratory of Traditional Chinese Medicine Informatization GuangzhouGuangdongChina

Background:The relationship between the regression and prognosis of melanoma has been debated for *** competing-risk events are present,using traditional survival analysis methods may induce bias in the identified prognostic factors that affect patients with regressive ***:Data on patients diagnosed with regressive melanoma were extracted from the Surveillance,Epidemiology,and End Results(SEER)database during *** incidence function and Gray's test were used for the univariate analysis,and the Cox proportional-hazards model and the Fine-Gray model were used for the multivariate ***:A total of 1442 eligible patients were diagnosed with regressive melanoma,including 529 patients who died:109 from regressive melanoma and 420 from other *** multivariate analysis using the Fine-Gray model revealed that SEER stage,surgery status,and marital status were important factors that affected the prognosis of regressive *** to the existence of competing-risk events,the Cox model may have induced biases in estimating the effect values,and the competing-risks model was more advantageous in the analysis of multipleendpoint clinical survival ***:The findings of this study may help clinicians to better understand regressive melanoma and provide reference data for clinical decisions.

关键词： competing-risks model prognosis regressive melanoma SEER Cox model

木质素基碳/硫纳米球复合材料作为高性能锂硫电池正极材料

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储能科学与技术 2024年第1期13卷 270-278页

作者：李顺黄建国何桂金浙江农林大学化学与材料工程学院浙江杭州311300 浙江大学化学系浙江杭州310058

锂硫二次电池因具有非常高的理论比容量(1675 mAh/g)和能量密度(2600 Wh/kg)而备受关注。然而,锂硫电池的正极材料单质硫因导电性差和在充放电过程中生成的多硫化物Li_(2)S_(n)(4≤n≤8)极易发生“穿梭效应”等问题,严重降低了对活性硫... 详细信息

锂硫二次电池因具有非常高的理论比容量(1675 mAh/g)和能量密度(2600 Wh/kg)而备受关注。然而,锂硫电池的正极材料单质硫因导电性差和在充放电过程中生成的多硫化物Li_(2)S_(n)(4≤n≤8)极易发生“穿梭效应”等问题,严重降低了对活性硫的利用效率,造成电极材料不可逆的容量损失。因此寻找成本低、可循环利用、热稳定性好的碳载体基质是提高锂硫电池电化学性能最有效的方法之一。在本研究中,以天然木质素作为碳源,首先经过萃取和碳化过程制备了多孔碳纳米球,再通过熔融过程,将单质硫成功地包裹进木质素基碳纳米球的孔隙中,制备得到多孔球状结构的碳/硫复合材料(LS-C/S)。当该复合材料用作锂硫电池正极材料时,在0.1 C电流密度下,硫含量为59.41%(质量分数)的电极材料的首次放/充电比容量分别为800.3 mAh/g和758.8 mAh/g,对应库仑效率为94.8%,在经过200次充放电循环后,其比容量稳定在647.4 mAh/g,容量保持率为84.3%,相当于每循环一圈容量平均损失为0.0785%。此外,在经过高倍率的充放电循环后,比容量仍能恢复并稳定在620 mAh/g,展现出良好的可逆倍率稳定性。这种木质素基碳纳米球具有的高比表面积和多孔结构,促进了锂离子和电子的传输,有效地抑制了中间产物多硫化锂的溶解扩散,提高了单质硫作为正极材料的利用效率,因此,复合材料表现出优异的循环稳定性和可逆倍率性能。

关键词：锂硫电池木质素碳纳米球正极材料电化学性能

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贝莱斯芽孢杆菌HY19挥发物对采后柑橘的防腐效果

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园艺学报 2024年第1期51卷 162-174页

作者：李素平李微韩冷黄建国西南大学资源环境学院重庆400715 中国农业科学院柑桔研究所重庆400712

为评估贝莱斯芽孢杆菌(Bacillus velezensis)HY19菌株挥发性有机化合物(Volatile organic compounds)作为柑橘果实防腐剂的潜力,通过对峙和二分格平板培养实验研究其对柑橘果实主要致病菌意大利青霉(Penicillium italicum)和指状青霉(*... 详细信息

为评估贝莱斯芽孢杆菌(Bacillus velezensis)HY19菌株挥发性有机化合物(Volatile organic compounds)作为柑橘果实防腐剂的潜力,通过对峙和二分格平板培养实验研究其对柑橘果实主要致病菌意大利青霉(Penicillium italicum)和指状青霉(***)的抑制作用。通过气相色谱—质谱联用技术对其产生的挥发性有机化合物中的抗真菌活性物质进行定性和定量分析,并通过人工接种及常温贮藏试验研究该挥发物对采后柑橘果实病害的防治效果。结果表明,菌株HY19及其释放的挥发性有机化合物显著抑制意大利青霉和指状青霉的菌丝生长,在该挥发性有机化合物中发现2–十三酮、邻苯二甲酸二丁酯、1–壬醇、苯甲酸等18种抗真菌物质。该挥发性有机化合物诱导柑橘果皮防御酶(SOD和POD)活性,降低果皮细胞膜透性和丙二醛含量,减轻病原菌对果皮的伤害,提高果皮抗病性,对青霉和绿霉的防治效果分别达到59.65%和64.11%。柑橘果实常温贮藏15和30 d后,该挥发性有机化合物显著降低果实的腐烂率,防腐效果分别为57.04%(15 d)和58.07%(30 d),且对果实品质无影响。综上,贝莱斯芽孢杆菌HY19具有开发为采后柑橘果实防腐剂的潜力。

关键词：柑橘贝莱斯芽孢杆菌挥发性有机化合物气相色谱—质谱联用生物防腐剂

The mechanism for SEU simulation by pulsed laser

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Science China(Physics,Mechanics & Astronomy) 2004年第5期47卷 540-549页

作者： huang jianguo HAN Jianwei Center for Space Science and Applied Research Chinese Academy of Sciences Beijing 100080 China Center for Space Science and Applied Research Chinese Academy of Sciences Beijing 100080 China

To simulate single event effect (SEE) by pulsed laser is a new approach in ground-based simulation of SEE in recent years. In this paper the way in which picosecond pulsed laser interacts with semiconductor and the mechanism of SEE inducement are analyzed. Additionally, associated calculations are made in the case of Nd:YAG and Ti:Sapphire lasers generally used in experiments and silicon device, with comparisons made between the two lasers. In the meantime, the fundamental principle for determining laser parameters and their typical ranges of values are provided according to the results.

关键词： SEE, pulsed laser, semiconductor, device.

A Posteriori Error Analysis of a P2-CDG Space-Time Finite Element Method for the Wave Equation

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Numerical Mathematics(Theory,Methods and Applications) 2022年第3期15卷 662-678页

作者： Yuling Guo jianguo huang College of Science University of Shanghai for Science and TechnologyShanghai 200093China School of Mathematical Sciences and MOE-LSC Shanghai Jiao Tong UniversityShanghai 200240China

This paper develops a posteriori error bound for a space-time finite element method for the linear wave *** standard P_(l)conforming element is used for the spatial discretization and a P_(2)-CDG method is applied for the time *** essential ingredients in the a posteriori error analysis are the twice time reconstruction functions and the C^(1)(J)-smooth elliptic reconstruction,which lead to reliable a posteriori error bound in view of the energy *** an outcome,a time adaptive algorithm is proposed with the error equidistribution *** experiments are reported to illustrate the performance of the a posteriori error bound and the validity of the adaptive algorithm.

关键词： P_(2)-CDG wave equations a posteriori error estimate

Calculation of LET in SEE simulation by pulsed laser

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Science China(Physics,Mechanics & Astronomy) 2005年第1期48卷 113-121页

A key point in SEE (Single Event Effect) simulation experiment is how to calculate the equivalent LET (Linear Energy Transfer) for laser pulse. In this paper, the calculation method considering the influences of nonlinear absorption in semiconductor,reflection and refraction on device surface and other factors is presented. Simultaneously an instance of calculation is provided, with the result in good agreement with the SEU (Single Event Upset) threshold measured by heavy ions.

关键词： SEE, pulsed laser, equivalent LET, device.

A Two-Level Additive Schwarz Preconditioner for Local C^0 Discontinuous Galerkin Methods of Kirchhoff Plates

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Communications on Applied Mathematics and Computation 2019年第2期1卷 167-185页

作者： jianguo huang Xuehai huang School of Mathematical Sciences and MOE-LSCShanghai Jiao Tong UniversityShanghai 200240China School of Mathematics Shanghai University of Finance and EconomicsShanghai 200433China

A two-level additive Schwarz preconditioner based on the overlapping domain decomposition approach is proposed for the local C0 discontinuous Galerkin (LCDG) method of Kirchhoff *** with the help of an intergrid transfer operator and its error estimates,it is proved that the condition number is bounded by O(1 + (H4/δ4)),where H is the diameter of the subdomains and δ measures the overlap among *** for some special cases of small overlap,the estimate can be improved as O(1 + (H3/δ3)).At last,some numerical results are reported to demonstrate the high efficiency of the two-level additive Schwarz preconditioner.

关键词： Kirchhoff plate C^0 discontinuous Galerkin Two-level additive Schwarz preconditioner Intergrid transfer operator