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Partial aging can counter-intuitively couple with sulfidation to improve the reactive durability of zerovalent iron

Frontiers of Environmental Science & Engineering 2024年第2期18卷 1-11页

作者： Yiwei Liu Kaili Gu Jinhua Zhang Jinxiang Li Jieshu Qian Jinyou Shen Xiaohong Guan Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China School of Ecological and Environmental Sciences East China Normal UniversityShanghai 200241China

Sulfated zero-valent iron(SZVI)has shown promising applications in wastewater treatment.However,the rapid decline in the reactivity of SZVI with time limits its real practice.To mediate this problem,partial aging was proposed to improve the reactive durability of SZVI.Taking Cr(VI)as the target contaminant,we found that the aged ZVI(AZVI)gradually lost reactivity as aging time increased from 0.5 to 2 d.Counter-intuitively,the partially aged SZVI(ASZVI)showed greater reactivity than SZVI when exposed to oxygenated water for a period ranging from 0.5 to 14 d.In addition,the ASZVI with 0.5 d of aging time(ASZVI-0.5)not only maintained reactivity in successive runs but also increased the Cr(VI)removal capacity from 9.1 mg/g by SZVI to 19.1 mg/g by ASZVI-0.5.Correlation analysis further revealed that the electron transfer from the Fe0 core to the shell was mediated by the conductive FeS and FeS2 in the subshell of ASZVI.Meanwhile,the lepidocrocite and magnetite on the surface of ASZVI facilitated Cr(VI)adsorption and subsequent electron transfer for Cr(VI)reduction.Moreover,the iron(hydr)oxide shell could retain the conductive FeS and FeS2 in the subshell,allowing ASZVI to reduce Cr(VI)efficiently and sustainably.In general,partial aging can enhance the reactive durability of ZVI when coupled with sulfidation and this synergistic effect will be beneficial to the application of SZVI-based technology for wastewater treatment.

关键词： Zerovalent iron sulfidation Partial aging Interface reconstruction Electron transfer

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Synthesis of Cu–TiO2/CuS p-n heterojunction via in situ sulfidation for highly efficient photocatalytic NO removal

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Progress in Natural Science:Materials International 2022年第5期32卷 561-569页

作者： Faguo Wang Shuo Yang Sumei Han Peng Sun Wenxiu Liu Qipeng Lu Wenbin Cao School of Materials Science and Engineering University of Science and Technology Beijing Institute of Urban Safety and Environmental Science Beijing Academic of Science and Technology

Cu doped TiO2/CuS(Cu–TiO2/CuS) p-n heterojunction was synthesized via in situ sulfidation method for efficient photocatalytic removal of NO at ppb-level. The results show that optimized Cu–TiO2/CuS heterojunction possessed a maximum efficiency of 85% for the removal of NO under visible light irradiation, which was approximately 8.5, 4.3 and 1.2 times that of CuS, TiO2and Cu–TiO2, respectively. The improved photocatalytic performance is attributed to the enhancement of visible light absorption and charge carrier separation induced by the construction of p-n heterojunction. Meanwhile, the p-n heterojunction charge transfer mechanism of Cu–TiO2/CuS was verified by systematic investigations. The appropriate band structures of the two components and the internal electric field formed at the interface of the heterojunction were two factors for this charge transfer mechanism. Furthermore, the role of active species in NO removal was explored, and the corresponding mechanism for NO removal of the heterojunction was proposed. This work provides a promising approach for the synthesis of heterojunction photocatalysts and facilitates the application of photocatalysts in sustainable and efficient pollutant removal.

关键词： Cu doped TiO 2 /CuS p-n heterojunction In situ sulfidation Visible light NO removal

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Atomic-level insight of sulfidation-engineered Aurivillius-related Bi_(2)O_(2)SiO_(3) nanosheets enabling visible light low-concentration CO_(2) conversion

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Carbon Energy 2023年第2期5卷 1-11页

作者： Kai Wang Yue Du Yuan Li Xiaoyong Wu Haiyan Hu Guohong Wang Yao Xiao Shulei Chou Gaoke Zhang College of Urban and Environmental Sciences Hubei Key Laboratory of Pollutant Analysis and Reuse TechnologyInstitute for Advanced MaterialsHubei Normal UniversityHuangshiHubeiChina School of Resources and Environmental Engineering Wuhan University of TechnologyWuhanHubeiChina Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhouZhejiangChina

Unraveling atomic-level active sites of layered photocatalyst towards lowconcentration CO_(2) conversion is still challenging.Herein,the yield and selectivity of photocatalytic CO_(2) reduction of the Aurivillius-related oxide semiconductor Bi_(2)O_(2)SiO_(3) nanosheet(BOSO)were largely improved using a surface sulfidation strategy.The experiment and theoretical calculation confirmed that surface sulfidation of the Bi_(2)O_(2)SiO_(3) nanosheet(S-BOSO,6.28 nm)redistributed the charge-enriched Bi sites,extended the solar spectrum absorption to the whole visible range,and considerably enhanced the charge separation,in addition to creating new reaction active sites,as compared to pristine BOSO.Subsequently,surface sulfidation played a switchable role,wherein S-BOSO showed a very high CH_(3)OH generation rate(12.78μmol g^(-1) for 4 h,78.6%selectivity)from low-concentration CO_(2)(1000 ppm)under visible light irradiation,which outperforms most of the state-of-the-art photocatalysts under similar conditions.This study presents an atomic-level modification protocol for engineering reactive sites and charge behaviors to promote solar-to-energy conversion.

关键词： [Bi_(2)O_(2)]^(2)+layer Bi_(2)O_(2)SiO_(3) low-concentration CO_(2)reduction photocatalysis sulfidation

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Effect of ammonium sulfate on the formation of zinc sulfide species on hemimorphite surface and its role in sulfidation flotation

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International Journal of Minerals,Metallurgy and Materials 2023年第11期30卷 2147-2156页

作者： Xi Zhang Yu Wang Jiushuai Deng Zhongyi Bai Hongxiang Xu Qingfeng Meng Da Jin Zhenwu Sun Key Laboratory of Separation and Processing of Symbiotic-Associated Mineral Resources in Non-ferrous Metal Industry School of Chemical and Environmental EngineeringChina University of Mining and Technology(Beijing)Beijing 100083China Inner Mongolia Research Institute China University of Mining and Technology(Beijing)Ordos 017001China State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming 650093China Engineering Technology Research Centre for Comprehensive Utilization of Rare Earth Rare Metal and Rare-Scattered in Non-ferrous Metal IndustryChina University of Mining and Technology(Beijing)Beijing 100083China

Effectively strengthening the surface sulfidation is essential for recovering hemimorphite by froth flotation.In this work,inductively coupled plasma optical emission spectrometer(ICP-OES)measurements,Visual MINTEQ calculation,X-ray photoelectron spectroscopy(XPS)analysis,time of flight secondary ion mass spectrometry(ToF-SIMS)analysis,and micro-flotation experiments were explored to systematically investigate the effect of ammonium sulfate((NH_(4))_(2)SO_(4))on the formation of zinc sulfide species on hemimorphite surface and its role in sulfidation flotation.The results showed that(NH_(4))_(2)SO_(4)exhibited a positive influence on hemimorphite sulfidation flotation.It was ascribed to the number of zinc components in the form of Zn^(2+)and[Zn(NH_(3))_(i)]^(2+)(i=1–4)increased in the flotation system after hemimorphite treatment with(NH_(4))_(2)SO_(4),which was beneficial to its interaction with sulfur species in solution,resulting in a dense and stable zinc sulfide layer generated on the hemimorphite surface.[Zn(NH_(3))_(i)]^(2+)participated in the sulfidation reaction of hemimorphite as a transition state.In addition the sulfidation reaction of hemimorphite was accelerated by(NH_(4))_(2)SO_(4).Thus,(NH_(4))_(2)SO_(4)presents a vital role in promoting the sulfidation of hemimorphite.

关键词： hemimorphite sulfidation ammonium sulfate zinc sulfide species adsorption flotation

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FeMoAl COATING AND ITS HIGHTEMPERATURE sulfidation PROPERTIES

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中国有色金属学会会刊：英文版 1997年第2期7卷 119-123页

作者： Li, Fang He, Yedong Qi, Huibin Huang, Zhenzhong Zhu, Rizhang Univ of Science and Technology Beijing Beijing China

ＦｅＭｏＡｌＣＯＡＴＩＮＧＡＮＤＩＴＳＨＩＧＨＴＥＭＰＥＲＡＴＵＲＥＳＵＬＦＩＤＡＴＩＯＮＰＲＯＰＥＲＴＩＥＳ①ＬｉＦａｎｇ，ＨｅＹｅｄｏｎｇ，ＱｉＨｕｉｂｉｎ，ＨｕａｎｇＺｈｅｎｚｈｏｎｇ，ＺｈｕＲｉｚｈａｎｇＢ... 详细信息

ＦｅＭｏＡｌＣＯＡＴＩＮＧＡＮＤＩＴＳＨＩＧＨＴＥＭＰＥＲＡＴＵＲＥＳＵＬＦＩＤＡＴＩＯＮＰＲＯＰＥＲＴＩＥＳ①ＬｉＦａｎｇ，ＨｅＹｅｄｏｎｇ，ＱｉＨｕｉｂｉｎ，ＨｕａｎｇＺｈｅｎｚｈｏｎｇ，ＺｈｕＲｉｚｈａｎｇＢｅｉｊｉｎｇＣｏｒｏｓｉｏｎａｎｄ...

关键词： FeMoAl coating high temperature sulfidation Al selective oxidation

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EVOLUTION OF SULFIDE SCALES ON Fe-Mo ALLOYS DURING sulfidation

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中国有色金属学会会刊：英文版 1997年第3期7卷 61-65页

作者： Liu, Haiping Qi, Huibin He, Yedong Zhu, Rizhang Univ of Science & Technology Beijing Beijing China

ＥＶＯＬＵＴＩＯＮＯＦＳＵＬＦＩＤＥＳＣＡＬＥＳＯＮＦｅＭｏＡＬＬＯＹＳＤＵＲＩＮＧＳＵＬＦＩＤＡＴＩＯＮ①ＬｉｕＨａｉｐｉｎｇ，ＱｉＨｕｉｂｉｎ，ＨｅＹｅｄｏｎｇ，ＺｈｕＲｉｚｈａｎｇＯｐｅｎＬａｂｏｒａｔｏｒｙ... 详细信息

ＥＶＯＬＵＴＩＯＮＯＦＳＵＬＦＩＤＥＳＣＡＬＥＳＯＮＦｅＭｏＡＬＬＯＹＳＤＵＲＩＮＧＳＵＬＦＩＤＡＴＩＯＮ①ＬｉｕＨａｉｐｉｎｇ，ＱｉＨｕｉｂｉｎ，ＨｅＹｅｄｏｎｇ，ＺｈｕＲｉｚｈａｎｇＯｐｅｎＬａｂｏｒａｔｏｒｙｆｏｒＣｏｒｒｏｓｉｏｎａｎｄＥｒ...

关键词： Fe Mo alloy sulfidation microstructure

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sulfidation of Ni, Mo-Containing Y Zeolites and Reactivity for Thiophene Hydrodesulfurization

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石油学报（石油加工） 1997年第S1期13卷 37-44页

作者： Cui Jun, Gao Zi (Department of Chemistry, Fudan University, Shanghai 200433 )

ＳｕｌｆｉｄａｔｉｏｎｏｆＮｉ，ＭｏＣｏｎｔａｉｎｉｎｇＹＺｅｏｌｉｔｅｓａｎｄＲｅａｃｔｉｖｉｔｙｆｏｒＴｈｉｏｐｈｅｎｅＨｙｄｒｏｄｅｓｕｌｆｕｒｉｚａｔｉｏｎＣｕｉＪｕｎ，ＧａｏＺｉ（Ｄｅｐａｒｔｍｅｎｔｏｆ... 详细信息

ＳｕｌｆｉｄａｔｉｏｎｏｆＮｉ，ＭｏＣｏｎｔａｉｎｉｎｇＹＺｅｏｌｉｔｅｓａｎｄＲｅａｃｔｉｖｉｔｙｆｏｒＴｈｉｏｐｈｅｎｅＨｙｄｒｏｄｅｓｕｌｆｕｒｉｚａｔｉｏｎＣｕｉＪｕｎ，ＧａｏＺｉ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＦｕｄａｎＵｎ...

关键词： Ni Mo containing Y zeolites sulfidation characterization thiophene hydrodesulfurization

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PROTECTION　AND　DAMAGE　OF　PREFORMED　OXIDE　SCALES　OF　Fe－25Cr－5Al　AND－10Al　ALLOYS　DURING　THEIR　SUBSEQUENT　sulfidation

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中国有色金属学会会刊：英文版 1994年第4期4卷 66-71页

作者： Qi, Huibin Zhu, Rizhang He, Yedong Wang, Shujuan (Department of Surface Science and Corrosion Engineering,University of Science and Technology Beijing,Beijing100083)

ＰＲＯＴＥＣＴＩＯＮＡＮＤＤＡＭＡＧＥＯＦＰＲＥＦＯＲＭＥＤＯＸＩＤＥＳＣＡＬＥＳＯＦＦｅ－２５Ｃｒ－５ＡｌＡＮＤ－１０ＡｌＡＬＬＯＹＳＤＵＲＩＮＧＴＨＥＩＲＳＵＢＳＥＱＵＥＮＴＳＵＬＦＩＤＡＴＩＯＮ￥Ｑｉ，Ｈｕｉｂ... 详细信息

ＰＲＯＴＥＣＴＩＯＮＡＮＤＤＡＭＡＧＥＯＦＰＲＥＦＯＲＭＥＤＯＸＩＤＥＳＣＡＬＥＳＯＦＦｅ－２５Ｃｒ－５ＡｌＡＮＤ－１０ＡｌＡＬＬＯＹＳＤＵＲＩＮＧＴＨＥＩＲＳＵＢＳＥＱＵＥＮＴＳＵＬＦＩＤＡＴＩＯＮ￥Ｑｉ，Ｈｕｉｂｉｎ；Ｚｈｕ，Ｒｉｚｈａｎｇ；Ｈｅ...

关键词： Fe-25Cr-5Al Fe-25Cr-10Al preoxidation sulfidation

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INFLUENCE OF Al ON HIGH TEMPERATURE sulfidation OF AN Fe-25Cr ALLOY IN H_2S-H_2 GAS MIXTURES

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中国有色金属学会会刊：英文版 1993年第4期3卷 43-49页

作者： Qi,Huibin Zhu,Rizhang Department of Surface Science and Corrosion Engineering,University of Science and Technology Beijing,Beijing 100083,ChinaWang,Shujuan Northeastern Unirersity,Shenyang 110006,China

The effects of 5 wt.-% Al and 10 wt.-% Al on the sulfidation behaviour of the Fe-25Cralloy in H2S-H2 gas mixtures in the temperature range of 700～900 C has been studied.Thesulfidation resistance of Fe-25Cr was improved and the sulfide scale morphologies,compositionand structure of Fe-25Cr changed remarkably.The sulfidation kinetics of the alloys with alu-minium obeyed basically the parabolic law after an initial period of reaction time.The sulfida-tion mechanism of the Fe-Cr-Al alloy has been proposed.

关键词： Al Fe-25Cr H2S-H2 gas mixtures sulfidation

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High-Temperature sulfidation of Mo-Nb Alloys

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Journal of Iron and Steel Research(International) 1998年第2期5卷 45-48页

作者： Wang Qingxiang Wuhan Yejin University of Science and Technology

The sulfidation rates and sulfide scales of pure Mo, pure Nb, and Mo Nb alloys are studied. By comparing the rates, an alloy with best sulfidation resistance is found. In addition, the sulfidation kinetics of Mo-50 ... 详细信息

关键词： sulfidation sulfide scale molybdenum niobium alloy

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