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Organic ligand nanoarchitectonics for BiVO_(4) photoanodes surface passivation and cocatalyst grafting

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Nano Research 2024年第5期17卷 3667-3674页

作者： Jingyi Lin Xin Li zhiliang Wang Runlu Liu Hui Pan Yixin Zhao Lingti Kong Yao Li Shenmin zhu Lianzhou Wang State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Nanomaterials Centre School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnologythe University of QueenslandQLD 4072Australia School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Wuhan Institute of TechnologyWuhan 430205China

Bismuth vanadate(BiVO_(4))is a promising photoanode material for efficient photoelectrochemical(PEC)water splitting,whereas its performance is inhibited by detrimental surface states.To solve the problem,herein,a low-cost organic molecule 1,3,5-benzenetricarboxylic acid(BTC)is selected for surface passivation of BiVO_(4) photoanodes(BVOs),which also provides bonding sites for Co^(2+)to anchor,resulting in a Co-BTC-BVO photoanode.Owing to its strong coordination with metal ions,BTC not only passivates surface states of BVO,but also provides bonding between BVO and catalytic active sites(Co^(2+))to form a molecular cocatalyst.Computational study and interfacial charge kinetic investigation reveal that chemical bonding formed at the interface greatly suppresses charge recombination and accelerates charge transfer.The obtained Co-BTC-BVO photoanode exhibits a photocurrent density of 4.82 mA/cm^(2) at 1.23 V vs.reversible hydrogen electrode(RHE)and a low onset potential of 0.22 VRHE under AM 1.5 G illumination,which ranks among the best photoanodes coupled with Co-based cocatalysts.This work presents a novel selection of passivation layers and emphasizes the significance of interfacial chemical bonding for the construction of efficient photoanodes.

关键词： bismuth vanadate photoanode water splitting surface passivation bridging ligands

Active forest management accelerates carbon storage in plantation forests in Lishui,southern China

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Forest Ecosystems 2022年第1期9卷 33-46页

作者： Jiaojiao Diao Jinxun Liu zhiliang zhu Xinyuan Wei Mingshi Li College of Forestry Nanjing Forestry UniversityNanjing 210037China Co-Innovation Center for Sustainable Forestry in Southern China Nanjing Forestry UniversityNanjing 210037China U.S.Geological Survey Western Geographic Science Center Moffett FieldCA 94035USA U.S.Geological Survey RestonVA 20192USA Environmental Sciences Division Oak Ridge National LaboratoryOak RidgeTN 37830USA

Background:China has committed to achieving peak CO_(2)emissions before 2030 and carbon neutrality before 2060;therefore,accelerated efforts are needed to better understand carbon accounting in industry and energy fields as well as terrestrial ecosystems.The carbon sink capacity of plantation forests contributes to the mitigation of climate change.Plantation forests throughout the world are intensively managed,and there is an urgent need to evaluate the effects of such management on long-term carbon dynamics.Methods:We assessed the carbon cycling patterns of ecosystems characterized by three typical plantation species(Chinese fir(Cunninghamia lanceolata(Lamb.)Hook.),oak(Cyclobalanopsis glauca(Thunb.)Oerst.),and pine(Pinus massoniana Lamb.))in Lishui,southern China,by using an integrated biosphere simulator(IBIS)tuned with localized parameters.Then,we used the state-and-transition simulation model(STSM)to study the effects of active forest management(AFM)on carbon storage by combining forest disturbance history and carbon cycle regimes.Results:1)The carbon stock of the oak plantation was lower at an early age(50 years)than that of the Chinese fir and pine plantations.2)The carbon densities of the pine and Chinese fir plantations peaked at 70 years(223.36 Mg⋅ha^(‒1))and 64 years(232.04 Mg⋅ha^(‒1)),respectively,while the carbon density in the oak plantation continued increasing(>100 years).3)From 1989 to 2019,the total carbon pools of the three plantation ecosystems followed an upward trend(an annual increase of 0.16–0.22 Tg C),with the largest proportional increase in the aboveground biomass carbon pool.4)AFM increased the recovery of carbon storage after 1996 and 2009 in the pine and Chinese fir plantations,respectively,but did not result in higher growth in the oak plantation.5)The proposed harvest planning is reasonable and conducive to maximizing the carbon sequestration capacity of the forest.Conclusions:This study provides an example of a carbon cycle coupling model th

关键词： Active forest management Carbon storage IBIS Plantations STSM

Synthesis and adsorption performance of lead ion-imprinted micro-beads with combination of two functional monomers

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Journal of Environmental Sciences 2011年第12期23卷 1955-1961页

作者： Linyan zhu zhiliang zhu Ronghua Zhang Jun Hong Yanling Qiu State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai 200092 China Department of Chemistry Tongji University Shanghai 200092 China Key Laboratory of Yangtze River Water Environment Ministry of Education of China Shanghai 200092 China

A novel ion-imprinted polymer, lead ion-imprinted micro-beads with combination of two functional monomers, was synthesized using the W/O/W polymerization method. Two functional monomers, 1,12-dodecanediol-O,O’-diphenyl-phosphonic acid （DDDPA） and 4-vinylpyridine, were used to form a suitable construction with micro-pores fitting the template and recognition sites. The eflects of adsorbent dosage, solution pH and the competitive ions on the adsorption and separation eflciency of lead ions were investigated. The lead ion-imprinted micro-beads were eflcient for lead ions removal from aqueous solution in a broad pH range （4–9）, when the adsorbent dosage was above 0.1 g/L. The adsorption process obeyed the pseudo second-order kinetics model and it only took half an hour to reach the equilibrium. The adsorption isotherm of lead ion was described by the Langmuir model （R2 0.99） with a maximum adsorption capacity of 116.9 mg/g. In the presence of competitive ions Co2＋ and Cd2＋, the lead ion-imprinted micro-beads showed a high selectivity for lead ions. The selectivity coeficient of Pb2＋/Cd2＋ and Pb2＋/Co2＋are 99.3 and 114.7, respectively.

关键词： lead ions adsorption lead ion-imprinted micro-beads selective separation recognition

Synthesis of mesoporous Cu/Mg/Fe layered double hydroxide and its adsorption performance for arsenate in aqueous solutions

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Journal of Environmental Sciences 2013年第5期25卷 944-953页

作者： Yanwei Guo zhiliang zhu Yanling Qiu Jianfu Zhao State Key Laboratory of Pollution Control and Resource Reuse Tongji University Key Laboratory of Yangtze River Water Environment Ministry of EducationTongji University

The mesoporous Cu/Mg/Fe layered double hydroxide（Cu/Mg/Fe-LDH） with carbonate intercalation was synthesized and used for the removal of arsenate from aqueous solutions.The Cu/Mg/Fe-LDH was characterized by Fourier transform infrared spectrometry,X-ray diffraction crystallography,scanning electron microscopy,X-ray photoelectron spectroscopy and Brunauer-Emmett-Teller.Effects of various physico-chemical parameters such as pH,adsorbent dosage,contact time and initial arsenate concentration on the adsorption of arsenate onto Cu/Mg/Fe-LDH were investigated.Results showed that it was efficient for the removal of arsenate,and the removal efficiency of arsenate increased with the increment of the adsorbent dosage,while the arsenate adsorption capacity decreased with increase of initial pH from 3 to 11.The adsorption isotherms can be well described by the Langmuir model with R 2 〉 0.99.Its adsorption kinetics followed the pseudo second-order kinetic model.Coexisting ions such as HPO42-,CO32-,SO42and NO3could compete with arsenate for adsorption sites on the Cu/Mg/Fe-LDH.The adsorption of arsenate on the adsorbent can be mainly attributed to the ion exchange process.It was found that the synthesized Cu/Mg/Fe-LDH can reduce the arsenate concentration down to a final level of 〈 10 μg/L under the experimental conditions,and makes it a potential material for the decontamination of arsenate polluted water.

关键词： arsenate adsorption mesoporous layered double hydroxide anion exchange

Effect of ferric and bromide ions on the formation and speciation of disinfection byproducts during chlorination

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Journal of Environmental Sciences 2011年第5期23卷 765-772页

作者： Shaogang Liu zhiliang zhu Yanling Qiu Jianfu Zhao State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai 200092 China. E-mail:zzl@*** Department of Chemical and Ecological Engineering Guangxi University for Nationalities Nanning 536000 China

The effects of ferric ion, pH, and bromide on the formation and distribution of disinfection byproducts （DBPs） during chlorination were studied. Two raw water samples from Huangpu River and Yangtze River, two typical drinking water sources of Shanghai, were used for the investigation. Compared with the samples from Huangpu River, the raw water samples from Yangtze River had lower content of total organic carbon （TOC） and ferric ions, but higher bromide concentrations. Under controlled chlorination conditions, four trihalomethanes （THMs）, nine haloacetic acids （HAAs）, total organic halogen （TOX） and its halogen species fractions, including total organic chlorine （TOC1） and total organic bromide （TOBr）, were determined. The results showed that co-existent ferric and bromide ions significantly promoted the formation of total THMs and HAAs for both raw water samples. Higher concentration of bromide ions significantly changed the speciation of the formed THMs and HAAs. There was an obvious shift to brominated species, which might result in a more adverse influence on the safety of drinking water. The results also indicated that high levels of bromide ions in raw water samples produced higher percentages of unknown TOBr.

关键词： disinfection byproducts total organic halogen chlorination ferric ion bromide ion

Removal of humic acid from aqueous solution by cetylpyridinium bromide modified zeolite

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Journal of Environmental Sciences 2010年第9期22卷 1327-1334页

作者： Yanhui Zhan zhiliang zhu Jianwei Lin Yanling Qiu Jianfu Zhao State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai 200092 China College of Marine Science Shanghai Ocean University Shanghai 201306 China

Natural zeolite was modified by loading cetylpyridinium bromide （CPB） to create more efficient sites for humic acid （HA） adsorption. The natural and CPB modified zeolites were characterized with X-ray diffraction, field emission scanning electron microscopy, Fourier transform infrared spectroscopy and elemental analysis. The effects of various experimental parameters such as contact time, initial HA concentration, solution pH and coexistent Ca^2＋, upon HA adsorption onto CPB modified zeolites were evaluated. The results showed that natural zeolite had negligible affinity for HA in aqueous solutions, but CPB modified zeolites exhibited high adsorption efficiency for HA. A higher CPB loading on natural zeolites exhibited a larger HA adsorption capacity. Acidic pH and coexistent Ca^2＋ were proved to be favorable for HA adsorption onto CPB modified zeolite. The kinetic process was well described by pseudo second-order model. The experimental isotherm data fitted well to Langmuir and Sips models. The maximum monolayer adsorption capacity of CPB modified zeolite with surfactant bilayer coverage was found to be 92.0 mg/g.

关键词： modified zeolite cetylpyridinium bromide humic acid

Seasonal variation effects on the formation of trihalomethane during chlorination of water from Yangtze River and associated cancer risk assessment

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Journal of Environmental Sciences 2011年第9期23卷 1503-1511页

作者： Shaogang Liu zhiliang zhu Chenfeng Fan Yanling Qiu Jianfu Zhao State Key Laboratory of Pollution Control and Resource Reuse Key Laboratory of Yangtze Aquatic Environment of Ministry of Education Tongji University Shanghai 200092 China Department of Chemical and Ecological Engineering Guangxi University for Nationalities Nanning 536000 China

For the system of water samples collected from Yangtze River,the effects of seasonal variation and Fe（III） concentrations on the formation and distribution of trihalomethanes （THMs） during chlorination have been investigated.The corresponding lifetime cancer risk of the formed THMs to human beings was estimated using the parameters and procedure issued by the US EPA.The results indicated that the average concentration of THMs （100.81 μg/L） in spring was significantly higher than that in other seasons,which was related to the higher bromide ion concentration resulted from the intrusion of tidal saltwater.The total cancer risk in spring reached 8.23 × 10 ？5 and 8.86 × 10 ？5 for males and females,respectively,which were about two times of those in summer under the experimental conditions.Furthermore,it was found that the presence of Fe（III） resulted in the increased level of THMs and greater cancer risk from exposure to humans.Under weak basic conditions,about 10% of the increment of THMs from the water samples in spring was found in the presence of 0.5 mg/L Fe（III） compared with the situation without Fe（III）.More attention should be given to the effect of the coexistence of Fe（III） and bromide ions on the risk assessment of human intake of THMs from drinking water should be paid more attention,especially in the coastland and estuaries.

关键词： trihalomethanes Fe（III） chlorination disinfection byproducts cancer risk assessment

Microwave enhanced stabilization of copper in artificially contaminated soil

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Frontiers of Environmental Science & Engineering 2011年第2期5卷 205-211页

作者： Hua ZHANG zhiliang zhu Noboru YOSHIKAWA State Key Laboratory of Pollution Control and Resource Reuse Tongji UniversityShanghai 200092China Graduate School of Environmental Studies Tohoku UniversitySendai 980-8579Japan

Microwave processing was used to stabilize copper ions in soil samples.Its effects on the stabilization efficiency were studied as a function of additive,microwave power,process time,and reaction atmosphere.The stabilization efficiency of the microwave process was evaluated based on the results of the toxicity characteristic leaching procedure(TCLP)test.The results showed that the optimal experimental condition contained a 700W microwave power,20 min process time and 3 iron wires as the additive,and that the highest stabilization efficiency level was more than 70%.In addition,the different reaction atmospheres showed no apparent effect on the stabilization efficiency of copper in the artificially contaminated soil.According to the result of the Tessier sequential extraction,the partial species of copper in the contaminated soil was deduced to transform from unstable species to stable states after the microwave process.

关键词： microwave copper stabilization

Removal of lead from aqueous solution by hydroxyapatite/ manganese dioxide composite

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Frontiers of Environmental Science & Engineering 2016年第1期10卷 28-36页

作者： Lijing DONG zhiliang zhu Yanling QIU Jianfu ZHAO Key Laboratory of Yangtze River Water Environment Ministry of Education Shanghai 200092 China Environmental Monitoring Centre of Changzhou Changzhou 213000 China State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai 200092 China

A novel composite adsorbent, hydroxyapatite/ manganese dioxide （HAp/MnO2）, has been developed for the purpose of removing lead ions from aqueous solutions. The combination of HAp with MnO2 is meant to increase its adsorption capacity. Various factors that may affect the adsorption efficiency, including solution pH, coexistent substances such as humic acid and competing cations （Ca2＋, Mg2＋）, initial solute concentration, and the duration of the reaction, have been investigated. Using this composite adsorbent, solution pH and coexistent calcium or magnesium cations were found to have no significant influence on the removal of lead ions under the experi- mental conditions. The adsorption equilibrium was described well by the Langmuir isotherm model, and the calculated maximum adsorption capacity was 769 mg. gl. The sorption processes obeyed the pseudo-second-order kinetics model. The experimental results indicate that HAp/MnO2 composite may be an effective adsorbent for the removal of lead ions from aqueous solutions.

关键词： manganese dioxide hydroxyapatite lead,adsorption composite materials