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Journal of Environmental Sciences 2012年第11期24卷 1900-1907页

作者： Jinyou Shen Zongyuan Zhou changjin ou Xiuyun Sun Jiansheng Li Weiqing Han Lin Zhou Lianjun Wang Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China School of Mechatronical Engineering Beijing Institute of TechnologyBeijing 100081China

A combined zero valent iron （ZVI） and anaerobic-aerobic process was adopted for the treatment of 2,4-dinitrochlorobenzene （DNCB）- containing wastewater. The transformation pathway, reduction of acute toxicity and enhancement of biodegradability were investigated, After pretreatment by ZVI, DNCB in wastewater could be completely converted into 2,4-diaminochlorobenzene （DACB）. The ratio of BODs/COD increased from 0.005±0.001 to 0.168±0.007, while EC50,48hr （V/V） increased from 0.65% to 5.20%, indicating the enhancement of biodegradability and reduction of acute toxicity with the pretreatment by ZVI. DACB was further dechlorinated to m-phenylenediamine during the anaerobic process using methanol as electron donor, with EC50＇ 48 hr increasing from 5.20% to 48.2%. After the subsequent anaerobic-aerobic process, m-phenylenediamine was degraded completely, with effluent COD of 67.5±10.8 mg/L. This effluent of the subsequent anaerobic-aerobic process was not toxic to zebrafish. The combined ZVI and anaerobic-aerobic process offers bright prospects for the treatment of chlorinated nitroaromatic compound-containing wastewater.

关键词： 2,4-dinitrochlorobenzene zero-valent iron toxicity biodegradability

Pure aromatic hydrocarbons with meta-linked phenyl-core and perihedral fluorene substitutions with/without inert groups of tert-butyl： bipolar hosts for blue phosphorescence

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Science China Chemistry 2017年第2期60卷 223-230页

作者： Gaowen Liu Chuanjun Wang Baoxiu Mi Minjie Zhuo changjin ou Jie Wang Shuchao Zheng Juan Song Zhiqiang Gao Dapeng Cao Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM) Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts & Telecommunications Nanjing 210023 China. School of Material Science and Engineering Jiangsu Engineering Centre for Flat-Panel Displays & Solid-state Lighting Nanjing University of Posts &Telecommunications Nanjing 210023 China

Two pure hydrocarbon molecules of l,3,5-tris(9-phenyl-9H-fluoren-9-yl)benzene(mTPFB)and l,3,5-tris(2-tert-butyl-9-phenyl-9H-fluoren-9-yl)benzene(tBu-mTPFB)were *** to the conjugation blocked connection mode and rigid/bulky substitutions,these two materials possess high triplet energy,enabling them as good hosts for blue phosphor in *** studying their thermal,electrochemical,electronic absorption and photoluminescent properties,it was found that the influence of the inert tert-butyl group on material photoelectrical properties is *** instance,mTPFB and tBu-mTPFB showed very similar absorption and emission profiles,with almost the same bandgap,triplet energy and energy ***,the encapsulation of tert-butyl on the 2-position of 9-phenylfluorene enhanced material thermal *** importantly,carrier transport properties were improved dramatically,as proved by the mono carrier *** phosphorescent OLEDs hosted by tBu-mTPFB showed external quantum efficiency of 15.2%and current efficiency of 23.0 cd/A,which were much higher than that of the OLEDs based on mTPFB with the analogous structure.

关键词： pure aromatic hydrocarbon bipolar host thermal stability carrier transport properties tert-butyl moiety

Selective Introduction of Carbazole and Diphenylamine into Spirofluorenexanthene Core for Different Phosphorescent Hosts

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Chinese Journal of Chemistry 2016年第8期34卷 771-777页

作者： Mingli Sun Shouzhen Yue Hongtao Cao changjin ou Yan Qian Ting Wang Ligang Chen Yi Zhao Wei Huang iang 150040 China Center for Molecular Systems and Organic Devices (CMSOD) Key Laboratory for Organic Electronics andln-formation Displays & Institute of Advanced Materials (IAM) National Synergistic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts & Telecommunications Nanjing Jiangsu 210023 China State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University Changchun Jilin 130013 China

Built on the spiro[fluorene-9,9′-xanthene] (SFX) core and two frequently-used hole-transporting groups such as carbazole and diphenylamine, two SFX derivatives, namely SFXCz and SFXDPA, have been synthesized by one-step reaction for red, green and blue phosphorescent organic light-emitting devices (PHOLEDs). Though the properties of these two groups are very similar, the devices based on SFXCz and SFXDPA exhibit distinct performances. In blue PHOLEDs, the device based on SFXCz exhibited much better performances than that based on SFXDPA. However, the latter was superior to the former in green and red PHOLEDs. And the red PHOLED based on SFXDPA exhibited maximum current efficiency (CE) of 27.1 cd·A−1, power efficiency (PE) of 25.0 lm·W−1, and external quantum efficiency (EQE) of 15.0%. The results show that the introduction of diphenylamine group is suitable for constructing green and red host materials, whereas the introduction of carbazole group is suitable for constructing blue host materials.

关键词： spirofluorenexanthene organic light-emitting diode host materials triplet energy level charge transport electroluminescence

Reuse of Fenton sludge as an iron source for NiFe_2O_4 synthesis and its application in the Fenton-based process

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Journal of Environmental Sciences 2017年第3期29卷 1-8页

作者： Hui Zhang Jianguo Liu changjin ou Faheem Jinyou Shen Hongxia Yu Zhenhuan Jiao Weiqing Han Xiuyun Sun Jiansheng Li Lianjun Wang Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing Universityof Science and TechnologyNanjing 210094China Beijing Changping Water Authority Beijing 102200China

The potentially hazardous iron-containing sludge from the Fenton process requires proper treatment and disposal, which often results in high treatment cost. In this study, a novel method for the reuse of Fenton sludge as an iron source for the synthesis of nickel ferrite particles （NiFe204） is proposed. Through a co-precipitation method followed by sintering at 800℃, magnetic NiFe204 particles were successfully synthesized, which was confirmed by powder X-ray diffraction （XRD）, scanning electronic microscopy （SEM）, energy dispersive spectroscopy （EDS）, Fourier transform infrared spectroscopy （FT-IR） and Raman spectros- copy. The synthesized NiFe204 could be used as an efficient catalyst in the heterogeneous Fenton process. In phenol degradation with H202 or NiFe204 alone, the phenol removal efficiencies within the reaction time of 330 min were as low as 5.9% ±0.1% and 13.5% ± 0.4%, respectively. However, in the presence of both NiFe204 and H202, phenol removal efficiency as high as 95% ± 3.4% could be achieved, indicating the excellent catalytic performance of NiFe204 in the heterogeneous Fenton process. Notably, a rapid electron exchange between --NiH and --Fem ions in the NiFe204 structure could be beneficial for the Fenton reaction. In addition, the magnetic catalyst was relatively stable, highly active and recoverable, and has potential applications in the Fenton process for organic pollutant removal.

关键词： Fenton Iron-containing sludgeReuseNickel ferriteMagnetic catalyst

A Bipolar and Small Singlet-Triplet Splitting Energy Host with Triplet Energy Lower Than a Blue Phosphor for Phosphorescent OLEDs in Panchromatic Range

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Chinese Journal of Chemistry 2016年第8期34卷 763-770页

作者： Chuanjun Wang Gaowen Liu Shaojie Liu Xunlu Zhang changjin ou Lu Wang Wei Sun Baoxiu Mi Juan Song Zhiqiang Gao Key Laboratory for Organic Electronics & Information Displays (KLOEID) Jiangsu Engineering Centre for Plate Displays & Solid State Lighting and Institute of Advanced Materials (IAM) School of Material Science and Engineering Nanjing University of Posts & Telecommunications Nanjing Jiangsu 210023 China Key Laboratory of Flexible Electronics & Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced Materials ( SICA M) Nanjing Tech University Nanjing Jiangsu 211816 China

A bipolar host material, 2,4,6-tris(3-(carbazol-9-yl)phenyl)-triazine (TCPZ), was synthesized according to reported method. Due to the higher triplet energy compared to green and red phosphors, TCPZ is suitable to host them in phosphorescent organic light-emitting diodes (PhOLEDs). Although the triplet of TCPZ is slightly lower than a common blue phosphor, good blue PhOLEDs using TCPZ as the host were successfully demonstrated in this work. By low temperature emission measurement, it was found that the energy splitting between the singlet and triplet of TCPZ is as small as 0.24 eV. Therefore, thermal activated energy transfer from triplet to singlet in the host TCPZ is expected to occur, which can be afterwards efficiently transferred to the blue phosphor, hence enabling it to host blue phosphor. As a result, TCPZ can be used as host for phosphors in panchromatic range. Additionally, single-carrier devices clearly prove its good bipolar transport feature, beneficial to device performance. By using TCPZ as a host, high performance deep-red, green and blue PhOLEDs have been achieved, with maximum efficiencies of 9.3 cd·A−1 (13.2%), 81.3 cd·A−1 (23.1%) and 17.03 cd·A−1 (10.4%), respectively.

关键词： panchromatic host material bipolar small singlet-triplet splitting large emission overlap

Promoting near-infrared II fluorescence efficiency by blocking long-range energy migration

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Aggregate

Aggregate 2023年第3期4卷 102-109页

作者： changjin ou Lei An Ziqi Zhao Fan Gao Liangyu Zheng Chao Xu Kang Zhang Jinjun Shao Linghai Xie Xiaochen Dong Institute of Advanced Materials and Flexible Electronics(IAMFE) School of Chemistry and Materials ScienceNanjing University of Information Science and TechnologyNanjingChina State Key Laboratory of Organic Electronics and Information Displays and Institute of Advanced Materials Nanjing University of Posts and TelecommunicationsNanjingChina Key Laboratory of Flexible Electronics(KLOFE)and Institute of Advanced Materials(IAM) Nanjing Tech University(NanjingTech)NanjingChina School of Chemistry and Materials Science Jiangsu Normal UniversityXuzhouChina

Generally,long wavelength absorbed near-infrared II(NIR-II)dyes have a low fluorescence efficiency in aggregate states for aggregate-caused quenching effect,simultaneously enhancing efficiency and extending absorption is a challenging issue for NIR-II ***,three benzo[1,2-c:4,5-c’]bis[1,2,5]thiadiazole(BBT)derivatives(TPA-BBT,FT-BBT,and BTBT-BBT)are used to clarify fluorescence quenching *** the BBT derivatives are doped into a small molecule matrix,they show quite different fluorescence *** TPA-BBT displays fluorescence quenching originating from short-range exchange interaction,while FT-BBT and BTBT-BBT with a co-planar-conjugated backbone exhibit concentration-dependent quenching processes,namely changing from long-range dipole-dipole interaction to exchange interaction,which could be majorly ascribed to large spectral overlap between absorption and *** precisely tuning doping concentration,both FT-BBT and BTBT-BBT nanoparticles(NPs)present the optimal NIR-II fluorescence brightness at∼2.5 wt%doping *** doped NPs have good biocompatibility and could be served as fluorescence contrast agents for vascular imaging with a high resolution under 980-nm laser *** paradigms evidence that molecular doping can promote fluorescence efficiency of long wavelength-absorbed NIR-II fluorophores via suppressing long-range energy migration.

关键词： co-planar structure dipole-dipole interaction fluorescence quenching molecular doping NIR-II fluorophore

On-line controlling system for nitrogen and phosphorus removal of municipal wastewater in a sequencing batch reactor (SBR)

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Frontiers of Environmental Science & Engineering 2008年第1期2卷 99-102页

作者： Jun LI Yongjiong NI Yongzhen PENG Guowei GU Jingen LU Su WEI Guobiao CHENG changjin ou College of Civil Engineering Zhejiang University of TechnologyHangzhou 310014China College of Environmental Engineering Beijing University of TechnologyBeijing 100022China College of Environmental Science and Engineering Tongji UniversityShanghai 200092China Hangzhou Sibao Sewage Treatment Plant Hangzhou 310014China

The objectives of this study were to establish an on-line controlling system for nitrogen and phosphorus removal synchronously of municipal wastewater in a sequencing batch reactor(SBR).The SBR for municipal wastewater treatment was operated in sequences:filling,anaerobic,oxic,anoxic,oxic,settling and *** reactor was equipped with on-line monitoring sensors for dissolved oxygen(DO),oxidation-reduction potential(ORP)and *** variation of DO,ORP and pH is relevant to each phase of biological process for nitrogen and phosphorus removal in this *** characteristic points of DO,ORP and pH can be used to judge and control the stages of process that include:phosphate release by the turning points of ORP and pH;nitrification by the ammonia valley of pH and ammonia elbows of DO and ORP;denitrification by the nitrate knee of ORP and nitrate apex of pH;phosphate uptake by the turning point of pH;and residual organic carbon oxida-tion by the carbon elbows of DO and *** controlling system can operate automatically for nitrogen and phosphorus efficiently removal.

关键词： sequencing batch reactor(SBR) nitrogen and phosphorus removal dissolved oxygen(DO) oxidation-reduction potential(ORP) pH online control

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非晶合金薄膜铜衬底的低损伤超光滑制备

机械工程学报 2014年第1期50卷 162-168页

作者：徐洪文东辉欧长劲浙江师范大学工学院金华321004 浙江工业大学特种装备制造与先进加工技术教育部重点实验室杭州310032

依据非晶合金薄膜生长对铜衬底的超光滑和低损伤要求,通过采用蓝宝石替代物实现进行式机械研磨。数值模拟结果表明能有效降低铜衬底的表面应力,试验测试表明替代物蓝宝石基片能有效地改善Rt值分布;通过设计开发动压浮离抛光基盘,利用液... 详细信息

依据非晶合金薄膜生长对铜衬底的超光滑和低损伤要求,通过采用蓝宝石替代物实现进行式机械研磨。数值模拟结果表明能有效降低铜衬底的表面应力,试验测试表明替代物蓝宝石基片能有效地改善Rt值分布;通过设计开发动压浮离抛光基盘,利用液动压效应使得抛光时铜衬底与磨粒之间呈软性接触状态,改善了抛光的润滑状态。综合采用纳米压痕、NT9800白光干涉仪、透射电镜分析铜衬底表面及亚表层特性,测试分析结果表明,制备的铜衬底表面粗糙度Ra0.37 nm、Rt4.94 nm,亚表层材质致密均匀,亚表面晶格分布有序,晶格间的距离较一致,采用进行式机械研磨和动压浮离抛光方法对铜衬底实现了低损伤超光滑制备。

关键词：非晶合金薄膜铜衬底低损伤超光滑