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Chinese Chemical Letters 2024年第7期35卷 183-187页

作者： Shiyu Pan Bo Cao Deling Yuan Tifeng Jiao Qingrui Zhang shoufeng tang State Key Laboratory of Metastable Materials Science and Technology Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource ReuseSchool of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China

To surmount the obstacles of traditional Fenton method and synchronously utilize Cu^(2+)and polyphenol in water,an improved Fenton-like reaction applying calcium peroxide(CaO_(2))as H_(2)O_(2)source and regulating by the complex of Cu^(2+)-tartaric acid(TA,a representative of polyphenol)was constructed.A typical antibiotic,metronidazole(MTZ)could be effectively eliminated by the Cu^(2+)/TA/CaO_(2)system,and the optimized parameters were as follows:0.1 mmol/L Cu^(2+),2 mmol/L TA,2 mmol/L CaO_(2),and initial *** spectrum confirmed the formation of Cu^(2+)-TA complex,which promoted the Cu^(2+)/Cu+circulation through decreasing the Cu^(2+)/Cu^(+) couple redox potential,which further enhanced the H_(2)O_(2)decomposition and the formation of reactive *** radical was dominant for MTZ degradation,followed by oxygen and superoxide *** degradation intermediates of MTZ were detected and their evolution way was ***,the ternary process showed a wide p H tolerance(3–8)for removing MTZ and broad applicability for eliminating other dyes and *** work provided a reference for Cu-based Fenton-like strategy for organic wastewater settlement.

关键词： Cupric ion Tartaric acid Complexation Calcium peroxide Metronidazole removal

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丹江口水库特大桥施工关键技术

桥梁建设 2024年第2期54卷 8-15页

作者：唐守峰吴学伟阳晏沈峰胡龙泳湖北交通投资集团有限公司湖北武汉430050

十淅高速丹江口水库特大桥为主跨760 m的双塔双索面部分地锚式混合梁斜拉桥。主墩采用群桩基础、八边形承台;桥塔采用H形混凝土结构;地锚式桥台采用箱形预应力混凝土结构;主梁采用混合梁,边跨为双边主肋预应力混凝土梁,主跨为钢-UHPC组... 详细信息

十淅高速丹江口水库特大桥为主跨760 m的双塔双索面部分地锚式混合梁斜拉桥。主墩采用群桩基础、八边形承台;桥塔采用H形混凝土结构;地锚式桥台采用箱形预应力混凝土结构;主梁采用混合梁,边跨为双边主肋预应力混凝土梁,主跨为钢-UHPC组合梁,主跨跨中设置中央无轴力连接装置+伸缩缝构造。针对该桥结构特点及水文条件,主墩桩基础和承台采用衡重式挡墙+单壁钢围堰方案,变水中施工为陆地施工,节约了工期和投资;塔柱采用液压爬模分节施工,中塔柱内倾塔肢间设2道水平横撑,保证了施工期塔柱受力和线形;地锚式桥台采用分块、分层并设后浇带的方案,有效改善了大体积混凝土的抗裂性能;边跨混凝土梁采用搭设钢管支架分段现浇施工;主跨钢主梁采取工厂化块件制造,库区陆地总拼并浇筑UHPC形成组合梁,再水运至桥位,采用桥面吊机悬臂吊装,现场施工湿接缝,解决了汉江上游航运能力不足的问题,同时创新提出并应用了钢-UHPC组合梁安装五步施工法,提高了主梁安装质量;中央无轴力连接装置采用逐缝合龙法高精度合龙方案,有效保证了结构功能的发挥。

关键词：部分地锚式斜拉桥钢-UHPC组合梁衡重式挡墙+单壁钢围堰地锚式桥台中央无轴力连接装置施工技术

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丹江口水库特大桥多格室钢-混结合段设计

桥梁建设 2024年第4期54卷 8-13页

作者：覃作伟廖原丁望星阳晏唐守峰湖北省交通规划设计院股份有限公司湖北武汉430051 湖北交通投资集团有限公司湖北武汉430050

丹江口水库特大桥为主跨760 m的双塔双索面部分地锚式混合梁斜拉桥,主跨主梁采用分离式双钢箱+正交异性钢-UHPC组合桥面结构轻型组合梁,边跨主梁采用PC边主梁。组合梁与PC梁连接过渡段总长6.0 m,其中钢梁段长1.0 m,钢梁加强段长3.0 m,钢... 详细信息

丹江口水库特大桥为主跨760 m的双塔双索面部分地锚式混合梁斜拉桥,主跨主梁采用分离式双钢箱+正交异性钢-UHPC组合桥面结构轻型组合梁,边跨主梁采用PC边主梁。组合梁与PC梁连接过渡段总长6.0 m,其中钢梁段长1.0 m,钢梁加强段长3.0 m,钢-混结合段长2.0 m。为解决钢-混结合段边箱部分截面刚度过渡剧烈、应力集中明显、格室内填充混凝土施工困难等问题,利用外腹板和风嘴箱室构造边箱多格室断面,形成“钢格室+后承压板”的结构,提高钢-混结合段边箱部分截面刚度过渡均匀性;格室内钢-混连接区域采用开孔板剪力键和剪力钉,提高结合段的抗剪强度及延性,增强整体连接的可靠性;格室内填充料采用活性粉末混凝土,并综合考虑结构性能需求和技术指标进行配合比优化,改善结合段的耐久性和施工可靠性。结构受力分析结果表明,各构件受力均满足设计要求。

关键词：斜拉桥混合梁钢-混结合段多格室构造开孔板剪力键剪力钉活性粉末混凝土结构设计

High-Sensitive Numerical Gas Detection Using LSPR Effect and Fano Resonance in a Slotted MDM Structure

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Photonic Sensors 2022年第2期12卷 164-174页

作者： Hai LIU Benlei ZHAO Xu ZHANG Hancheng ZHANG Bo WU shoufeng tang School of Information and Control Engineering China University of Mining and TechnologyXuzhou 221116China

A high-sensitive numerical measurement of methane based on the combined use of the localized surface plasmon resonance(LSPR)and Fano resonance in a slotted metal-dielectric-metal(MDM)periodic structure is numerically investigated.A groove is etched in an original MDM structure to excite the diploe mode at both sides of the groove,and the coherent coupling of two dipole modes is enhanced to realize a fast response,which is beneficial to *** influence of geometric parameters on the reflection spectra and methane sensitivity are analyzed to obtain optimal ***,an etching ring is introduced on the top metal to further raise the coupling area and coupling *** Fano resonance is subtly integrated into the optimized structure with asymmetry to achieve greater gas *** the introduction of the Fano resonance,the field enhancement caused by the LSPR effect becomes greater and the methane sensitivity can reach up to 8.421 nm/%in numerical calculations,which increases 56.8%more than that of the original *** combined use of the LSPR and Fano resonance in an optimized MDM structure provides an effective method for high-sensitive gas detection.

关键词： Localized surface plasmon resonance Fano resonance gas sensors MDM structure

碳纤维增强复合材料筋材应力松弛性能的试验研究

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工业建筑 2024年第6期54卷 13-21页

作者：李俊宇方志唐守峰廖原王志伟湖南大学土木工程学院长沙410082 湖北交通投资集团有限公司武汉430000 湖北省交通规划设计院股份有限公司武汉430000 中复碳芯电缆科技有限公司江苏连云港222069

为合理确定湖北十淅高速丹江口水库特大桥地锚桥台预应力碳纤维增强复合材料(Carbon Fiber Reinforced Polymer, CFRP)筋材的松弛损失,对不同应力比下所用CFRP筋材的应力松弛效应进行了试验研究。基于黏结式锚具和机械压接式锚具锚固的C... 详细信息

为合理确定湖北十淅高速丹江口水库特大桥地锚桥台预应力碳纤维增强复合材料(Carbon Fiber Reinforced Polymer, CFRP)筋材的松弛损失,对不同应力比下所用CFRP筋材的应力松弛效应进行了试验研究。基于黏结式锚具和机械压接式锚具锚固的CFRP筋材试件的轴向拉伸试验结果,明确了不同锚固形式对CFRP筋材破坏形态的影响及CFRP筋材的材料性能;基于CFRP筋材试件1 000 h的应力松弛试验,获得了不同应力水平下CFRP筋材应力松弛的发展规律。结果表明:黏结式锚具锚固的轴拉试件发生了理想的筋材拉断爆裂破坏,但应力松弛试件在试验过程中应变变化较大;机械压接式锚具锚固的轴拉试件提前发生了CFRP筋材的层裂剥离破坏,但应力松弛试件在试验过程中应变变化较小,满足GB/T 21839—2019中应力松弛试验的相关要求。随着初始应力比的提高,CFRP筋材的应力松弛越大,初始应力比分别为0.53、0.63和0.82的试件1 000 h的松弛率分别为1.06%、1.65%和2.31%;CFRP筋材应力松弛的发展收敛较快且随初始应力的增加而更快趋于稳定,初始应力比为0.53、0.63和0.82的试件24 h的应力松弛量分别为1 000 h的45.3%、58.8%和59.7%,200 h的应力松弛量分别为1 000 h的78.3%、81.2%和82.7%;基于试验结果,建立了CFRP筋材应力松弛的预测模型,且具有较高预测精度,并预测了丹江口水库特大桥地锚桥台所用预应力CFRP筋材10年,30年、50年和100年的松弛率分别为1.91%、2.18%、2.32%和2.52%。

关键词：应力松弛碳纤维复合材料(CFRP)筋材锚固形式初始应力比预测模型

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电化学活化亚硫酸钙体系降解四环素的研究

当代化工研究 2024年第9期 166-168页

作者：王跃欣徐强宫玉才周延明张贻江唐首锋唐山佳华煤化工有限公司河北063300 河北省水体重金属深度修复与资源利用重点实验室、燕山大学河北066004

本研究旨在研发一种高效的方法,用于处理水体中存在的四环素类抗生素,因其对公共卫生安全构成威胁。我们采用了电化学氧化法,具体是Electro/sulfite体系,其中以亚硫酸钙(CaSO3)作为还原剂和自由基前驱物,以成功分解四环素(TC)。研究结... 详细信息

本研究旨在研发一种高效的方法,用于处理水体中存在的四环素类抗生素,因其对公共卫生安全构成威胁。我们采用了电化学氧化法,具体是Electro/sulfite体系,其中以亚硫酸钙(CaSO3)作为还原剂和自由基前驱物,以成功分解四环素(TC)。研究结果表明,Electro/sulfite体系对TC的去除效果表现出协同作用,明显优于单独使用电化学或亚硫酸盐体系。通过自由基掩蔽实验的分析,我们确定了主要的活性物质为羟基自由基(·OH)和单线态氧(1O2),这两者在TC降解中起主导作用。此外,通过采用高性能液相色谱-质谱联用技术(HPLC-MS),我们推测了TC的降解途径,包括脱羟基、脱氨基、酰基反应和苯环开环反应等。最终,TC被完全氧化降解为无害的无机物质。这项研究为处理水体中存在的抗生素类污染物提供了一种高效的方法。

关键词：电化学四环素高级氧化

High Sensitive Methane Sensor With Temperature Compensation Based on Selectively Liquid-Infiltrated Photonic Crystal Fibers

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Photonic Sensors 2019年第3期9卷 213-222页

作者： Hai LIU Haoran WANG Wen ZHANG Cancan CHEN Qing WANG Yi DING shoufeng tang School of Information and Control Engineering China University of Mining and Technology Xuzhou 221116 China

A highly sensitive and temperature-compensated methane sensor based on a liquid-infiltrated photonic crystal fiber (PCF) is proposed. Two bigger holes near the core area are coated with a methane-sensitive compound film, and specific cladding air holes are infiltrated into the liquid material to form new defective channels. The proposed sensor can achieve accurate measurement of methane concentration through temperature compensation. The sensitivity can reach to 20.07nm/% with a high linearity as the methane concentration is within the range of 0%-3.5% by volume. The proposed methane sensor can not only improve the measurement accuracy, but also reduce the metrical difficulty and simplify the process.

关键词： Photonic crystal fiber methane sensor directional resonance coupling temperature compensation

Ferric ion-ascorbic acid complex catalyzed calcium peroxide for organic wastewater treatment:Optimized by response surface method

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Chinese Chemical Letters 2021年第11期32卷 3387-3392页

作者： Deling Yuan Chen Zhang shoufeng tang Zetao Wang Qina Sun Xiaoyu Zhang Tifeng Jiao Qingrui Zhang Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse Hebei Key Laboratory of Applied ChemistrySchool of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China

Hydrogen peroxide(H_(2)O_(2))disproportionation,iron precipitation,and narrow pH range are the drawbacks of traditional Fenton *** surmount these barriers,we proposed a ferric ion(Fe^(3+))-ascorbic acid(AA)complex catalyzed calcium peroxide(CaO_(2))Fenton-like system to remove organic dyes in *** collaborative Fe^(3+)/AA/CaO_(2)system presented an obvious improvement in the methyl orange(MO)decolorization,and also effectively eliminated other *** surface method was employed to optimize the running parameters for this coupling *** the optimized arguments(2.76 mmol/L Fe^(3+),0.68 mmol/L AA,and 4 mmol/L CaO_(2)),the MO removal achieved 98.90%after 15 min at pH 6.50,which was close to the computed outcome of 99.30%.Furthermore,this Fenton-like system could perform well in a wide range of pH(3-11),and enhance the H_(2)O_(2)decomposition and Fe ions *** scavenger experiment result indicated that hydroxyl radical,superoxide anion free radical,and singlet oxygen were acted on the dye ***,electron spin resonance analysis corroborated that the existences of these active species in the Fe^(3+)/AA/CaO_(2)*** study could advance the development of Fenton-like technique in organic effluent disposal.

关键词： Ferric ion Ascorbic acid Calcium peroxide Response surface method Dye removal

All-solid-state BiVO4/ZnIn2S4 Z-scheme composite with efficient charge separations for improved visible light photocatalytic organics degradation

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Chinese Chemical Letters 2020年第2期31卷 547-550页

作者： Deling Yuan Mengting Sun shoufeng tang Yating Zhang Zetao Wang Jinbang Qi Yandi Rao Qingrui Zhang Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse School of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China

Constructing a Z-scheme is a significant approach to improve the separation of photogene rated carriers for effective organic pollutant ***,a BiVO4/ZnIn2S4(BZ) Z-scheme composite was successfully synthesized,and applied to photodegrade methyl orange(MO) irradiated by a LED *** the BiVO4 on the ZnIn2S4 nanoparticles promoted the separation of photogenerated electronholes and broadened the light response *** detailed characterizations,including surface morphology,elements valence state,and photocurrent performance,demonstrated that the enhanced separation of photogenerated carriers was the pivotal reason for the enhanced photocatalysis *** from the excellent photocatalytic characteristics,the 5% mass ratio of BZ composite presented the highest MO degradation rate of 0.00997 min^-1,which was 1.9 and 10.3 times greater than the virgin ZnIn2S4 and BiVO4,***,the BZ hybrid materials indicated a well photo-stability in the four recycling tests.

关键词： Z-scheme composite BiVO4 ZnIn2S4 Visible light photocatalysis Charge separation Organic pollutant degradation

Simultaneous structure and luminescence property control of barium carbonate nanocrystals through small amount of lanthanide doping

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Science Bulletin 2017年第18期62卷 1239-1244页

作者： Jianmin Gu Zhenpan Bian Baipeng Yin Cuihong Jin Xin Liu Yahui Gao Jingxiao Wu shoufeng tang Faming Gao Yong Sheng Zhao Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical Engineering Yanshan University Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences

Rare earth doping has been widely applied in many functional nanomaterials with desirable properties and functions,which would have a significant effect on the growth process of the ***,the controlling strategy is limited into high concentration of lanthanide doping,which produces concentration quenching of the lanthanide ion luminescence with an increase in the Ln^(3+)concentration,resulting in lowering the fluorescence quantum yield of lanthanide ***,for the first time,we demonstrate simultaneous control of the structures and luminescence properties of BaCO_3nanocrystals via a small amount of Tb^(3+)doping *** fact,Tb^(3+)would partially occupy Ba^(2+)sites,resulting in the changes to the structures of the BaCO_3nanocrystals,which is primarily determined by charge modulation,including the contributions from the surfaces of crystal nuclei and building *** structurally modified nanocrystals exhibit tunable luminescence properties,thus emerging as potential candidates for photonic devices such as light-emitting diodes and color displays.

关键词：纳米晶体结构稀土掺杂控制策略发光性能碳酸钡功能纳米材料镧系猝灭浓度