作者机构：
[Zhang, Lizhi; Li, Jie; Yu, Ying] Cent China Normal Univ, Coll Chem, Inst Environm Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China.;[Li, Jie; Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Lizhi] C;Cent China Normal Univ, Coll Chem, Inst Environm Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China.
摘要：
In recent years, layered bismuth oxyhalide nanomaterials have received more and more interest as promising photocatalysts because their unique layered structures endow them with fascinating physicochemical properties; thus, they have great potential photocatalytic applications for environment remediation and energy harvesting. In this article, we explore the synthesis strategies and growth mechanisms of layered bismuth oxyhalide nanomaterials, and propose design principles of tailoring a layered configuration to control the nanoarchitectures for high efficient photocatalysis. Subsequently, we focus on their layered structure dependent properties, including pH-related crystal facet exposure and phase transformation, facet-dependent photoactivity and molecular oxygen activation pathways, so as to clarify the origin of the layered structure dependent photoreactivity. Furthermore, we summarize various strategies for modulating the composition and arrangement of layered structures to enhance the photoactivity of nanostructured bismuth oxyhalides via internal electric field tuning, dehalogenation effect, surface functionalization, doping, plasmon modification, and heterojunction construction, which may offer efficient guidance for the design and construction of high-performance bismuth oxyhalide-based photocatalysis systems. Finally, we highlight some crucial issues in engineering the layered-structure mediated properties of bismuth oxyhalide photocatalysts and provide tentative suggestions for future research on increasing their photocatalytic performance.
期刊：
Separation and Purification Technology,2013年120:148-155 ISSN：1383-5866
通讯作者：
Zhang, Lizhi
作者机构：
[Zhang, Lizhi; Li, Pengna; Wang, Li; Wang, Feng] Cent China Normal Univ, Coll Chem, Inst Environm Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Lizhi] C;Cent China Normal Univ, Coll Chem, Inst Environm Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China.
关键词：
Dioxygen activation;Ferrous-tetrapolyphosphate complex;Toxic organic pollutants;Wet air oxidation
摘要：
In this study, we demonstrate that ferrous–tetrapolyphosphate complex could activate dioxygen to produce reactive oxygen species for highly efficient aerobic degradation of toxic organic pollutants at room temperature and pressure. Cyclic voltammogram study revealed the chelation of ferrous ions with tetrapolyphosphate could significantly reduce the redox potential of Fe3+/Fe2+ to efficiently activate molecular oxygen in air. The dioxygen activation ability of ferrous–tetrapolyphosphate complex was found to be related to its concentration and pH value in the solution. The mechanism of dioxygen activation induced by ferrous–tetrapolyphosphate complex and the degradation pathway of sodium pentachlorophenol were studied in detail. We also found that a kind of dissimilatory iron-reducing bacterium could reduce ferric-tetrapolyphosphate to ferrous–tetrapolyphosphate under anaerobic conditions and therefore regenerate the deactivated ferrous–tetrapolyphosphate/air system. This study provides a novel green oxidation method for environmental pollutant control and remediation.
作者机构：
Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, Institute of Environmental Chemistry, Central China Normal University, Wuhan, Hubei 430079, P.R.China
会议名称：
2013 International Symposium on Environmental Science and Technology(2013环境科学与技术国际会议)
会议时间：
2013-06-04
会议地点：
大连
会议论文集名称：
2013 International Symposium on Environmental Science and Technology(2013环境科学与技术国际会议)论文集
摘要：
In this study,we demonstrate that sodium pentachlorophenol (NaPCP) could be efficiently degraded with dioxygen in air activated by Fe@Fe2O3 and tetrapolyphosphate (Air/Fe@Fe2O3/TPP).The process of dioxygen activation appeared to be a one-electron transfer route in this novel Air/Fe@Fe2O3/TPP system.Tetrapolyphosphate could increase the dissolved iron concentration,and then accelerate the conversion of for ·O2-to H2O2.Sodium pentachlorophenol was attacked by ·OH,resulting in the generation of tetrachloro-p-benzoquinone,tetrachloro-o-hydroquinone and tetrachloro-p-hydroquinone intermediates.These intermediates were further degraded into acids that eventually led to CO2 and H2O,companying with the release of chloride ion.
期刊：
Journal of Physical Chemistry C,2013年117(8):4062-4068 ISSN：1932-7447
通讯作者：
Zhang, Lizhi
作者机构：
[Zhang, Lizhi; Dong, Guohui] Cent China Normal Univ, Coll Chem, Inst Environm Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Lizhi] C;Cent China Normal Univ, Coll Chem, Inst Environm Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China.
摘要：
In this study, we report on the synthesis of formate anion containing graphitic carbon nitride and its dramatically enhanced activity and stability on Cr(VI) photoreduction under visible light. We found that the incorporated formate anions could not only trap photogenerated holes to produce more photogenerated electrons, but also change two-step superoxide ions mediated indirect reduction to one-step direct photogenerated electron reduction of Cr(VI) over graphitic carbon nitride under visible light through inhibiting surface dioxygen adsorption and thus enhance Cr(VI) photoreduction. This study could not only develop a novel strategy to improve the Cr(VI) photoreduction activity and stability of semiconductors but also shed light on the deep understanding of the relationship between intrinsic structure and Cr(VI) photoreduction activity of semiconductor photocatalysts.
作者机构：
Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College.of Chemistry, Central China Normal University, Wuhan, Hubei 430079, P.R.China
会议名称：
2013 International Symposium on Environmental Science and Technology(2013环境科学与技术国际会议)
会议时间：
2013-06-04
会议地点：
大连
会议论文集名称：
2013 International Symposium on Environmental Science and Technology(2013环境科学与技术国际会议)论文集
摘要：
Recently electrochemical advanced oxidation technologies (EAOTs),involving an in situ generation of highly potent chemical oxidants such as hydroxyl radicals (·OH) with electric energy,has amused los of attention in degradation of aqueous recalcitrant organic pollutants due to its amenability to high efficiency,automation and environmental compatibility.Among EAOTs,photo-electrochemical oxidation (PEC) and electro-Fenton oxidation (EF) technologies are widely used for the destruction of recalcitrant organic contaminants that cannot be eliminated biologically in wastewater treatment.In this study we design an in situ dye sensitized solar cell driving E-Fenton oxidation system by coupling a P25/FTO anode with a Fe@Fe2O3/ACF composite cathode (P25/FTO | Fe@Fe2O3/ACF) in an undivided cell.This system could promote the separation of the holes and photoelectrons and meanwhile utilize the photoelectrons generated on the anode to reduce oxygen for the generation of H2O2 on the cathode.
作者机构：
Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, Institute of Environmental Chemistry, Central China Normal University,Wuhan, Hubei 430079, P.R.China
会议名称：
2013 International Symposium on Environmental Science and Technology(2013环境科学与技术国际会议)
会议时间：
2013-06-04
会议地点：
大连
会议论文集名称：
2013 International Symposium on Environmental Science and Technology(2013环境科学与技术国际会议)论文集
摘要：
The decomposition of herbicide 2-chloro-4,6-bis (ethylamino)-s-trazine (simazine) was investigated by activate molecular oxygen using the Fe@Fe2O3 core-shell nanowires and Fe (Ⅲ).The properties of Fe@Fe2O3 before and after reaction were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS).The characterizations results revealed the Fe0 core was corroded faster in the present of Fe (Ⅱ),and the Fe3O4 generated on the surface of shell was advantageof the electron transfer.We have also determined the reactive oxygen species (ROS) and concluded that the alteration of the shell could improve the generation of hydroxyl radicals.The degradation intermediates of simazine were determined by HPLC/MS,GC/MS,and IC.We proposed the possible mechanistic steps of Simazine degradation,which are mainly related to the dealkylation reaction.This novel molecular oxygen activation approach may provide potentials for wastewater treatment and groundwater purification.
作者机构：
[Wang, Kewei; Zhang, Lizhi; Jia, Falong] Cent China Normal Univ, Coll Chem, Key Lab Pesticide & Chem Biol, Minist Educ, Wuhan 430079, Peoples R China.
通讯机构：
[Jia, Falong] C;Cent China Normal Univ, Coll Chem, Key Lab Pesticide & Chem Biol, Minist Educ, Wuhan 430079, Peoples R China.
关键词：
BiOI;Flexible solar cell;Nanocrystalline materials;Thin film
摘要：
BiOI nanoflake arrays were fabricated on the ITO/PET substrate by modified successive ionic layer adsorption and reaction (SILAR) method and served as p-type semiconductor materials for flexible solar cell. The morphologies of BiOI nanoflakes deposited on ITO/PET after different cycles of SILAR were analyzed and these nanoflakes were all in single crystalline structure. The growth process of BiOI nanoflake arrays was discussed and corresponding formation mechanism was proposed. The assembled dye-free BiOI/ITO/PET solar cell exhibited superior photovoltaic performance than that on FTO/glass substrate. In addition, the adhesion of BiOI to ITO/PET substrate was superior and the photocurrent of flexible solar cell was stable after bending test.
期刊：
Journal of Materials Chemistry,2012年22(3):1160-1166 ISSN：0959-9428
通讯作者：
Zhang, Lizhi
作者机构：
[Zhang, Lizhi; Dong, Guohui] Cent China Normal Univ, Coll Chem, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Lizhi] C;Cent China Normal Univ, Coll Chem, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China.
摘要：
We demonstrate that graphitic carbon nitride can photoreduce CO2 to CO in the presence of water vapor and exhibit interesting porous structure dependent reactivity on photoreduction and photooxidation under visible light (λ > 420 nm). Graphitic carbon nitride was synthesized by directly heating the inexpensive melamine and the replacement of melamine with melamine hydrochloride could result in porousification in the final graphitic carbon nitride with much higher surface area (39 times) and more abundant pores, accompanied by a band gap increase of 0.13 eV. The porousification could significantly enhance the photoreactivity of graphitic carbon nitride in rhodamine B photooxidation by 9.4 times, but lower its activity in CO2 photoreduction by 4.6 times. The reasons for the porous structure dependent photoreactivity were investigated in detail. These new findings could shed light on the design of efficient photocatalysts and the tuning of their photoreactivity for environmental and energy applications.
期刊：
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2012年134(10):4473-4476 ISSN：0002-7863
通讯作者：
Zhang, Lizhi
作者机构：
[Jiang, Jing; Zhang, Lizhi; Xiao, Xiaoyi; Zhao, Kun] Cent China Normal Univ, Coll Chem, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Lizhi] C;Cent China Normal Univ, Coll Chem, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China.
摘要：
BiOCl single-crystalline nanosheets with exposed {001} and {010} facets were selectively synthesized via a facile hydrothermal route. The resulting BiOCl single-crystalline nanosheets with exposed {001} facets exhibited higher activity for direct semiconductor photoexcitation pollutant degradation under UV light, but the counterpart with exposed {010} facets possessed superior activity for indirect dye photosensitization degradation under visible light.
