Article
Chemistry, Physical
Ge Gao, Lei Zhang, Yixin Shi, Shengjiong Yang, Gen Wang, Huining Xu, Dahu Ding, Rongzhi Chen, Pengkang Jin, Xiaochang C. Wang
Summary: The study found that the microscopic galvanic cell (mGC) exhibited higher Fe(II) release performance compared to ordinary nanoscale-ZVI (nZVI), resulting in improved Cr(VI) removal efficiency. Density functional theory (DFT) revealed that the close proximity of cathode and anode in mGC enhanced the galvanic corrosion of Fe(0). Additionally, hydroxyl radicals generated by a series of side-reactions slightly hindered the reduction of Cr(VI) in the system.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Environmental
Wenying Zhang, Linbo Qian, Lu Han, Lei Yang, Da Ouyang, Ying Long, Zifei Wei, Xinzhu Dong, Cong Liang, Jing Li, Mingyue Gu, Mengfang Chen
Summary: The study successfully demonstrated simultaneous removal of Cr(VI) and TCE from aqueous solutions using AT-nZVI/PS systems, with removal efficiencies reaching over 90% for both contaminants.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Liying Ma, Yaguang Du, Shaohua Chen, Fen Zhang, Wei Zhan, Dongyun Du, Tian C. Zhang
Summary: The study explores the efficient reduction/removal of high concentration of hexavalent chromium [Cr(VI)] by coupling nZVI with MR-1, with optimal experimental conditions identified for maximum removal efficiency. The addition of MR-1 is shown to promote dissolution of the passivation layer on the nZVI surface, significantly improving Cr(VI) reduction/removal efficiency. This method may have great potential for reduction and detoxification of Cr(VI) in aqueous environments.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Environmental Sciences
Linbo Qian, Ying Long, Hangyu Li, Zifei Wei, Cong Liang, Renlan Liu, Mengfang Chen
Summary: In this study, the removal of hexavalent chromium (Cr(VI)) and Trichloroethylene (TCE) by rice straw pyrolysis biochar supported nanoscale zero-valent iron (nZVI) was investigated. The results showed that biochar supported nZVI effectively removed Cr(VI) and TCE in single pollutant system, but mutual inhibition occurred when both contaminants were present. Therefore, the mutual inhibition effect should be evaluated in the remediation of combined contaminated groundwater.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Chemical
Minhui Hou, Yu Zhang, Xin Jiao, Ning Ding, Yongli Jiao, Yuwei Pan, Jinkai Xue, Ying Zhang
Summary: Polyphenols were used to modify zero-valent iron (ZVI) and new catalysts were successfully synthesized. The modified ZVI showed improved removal efficiency of Cr(VI) due to enhanced electron transfer rate.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Wenying Zhang, Linbo Qian, Yun Chen, Da Ouyang, Lu Han, Xiao Shang, Jing Li, Mingyue Gu, Mengfang Chen
Summary: The attapulgite treated by HCl and HF showed increased silicon content and active silicon sites, leading to higher removal efficiency for Cr(VI). Silicon played a significant role in the reductive precipitation of Cr(VI) through Si-O-Fe coupling.
Article
Chemistry, Multidisciplinary
Xiangpeng Tan, Muhammad Shaaban, Jianwei Yang, Yajun Cai, Buyun Wang, Qi-An Peng
Summary: This study used ramie biochar (RBC) to activate nano zero-valent iron (nZVI) for enhanced removal of hexavalent chromium (Cr(VI)). The RBC-nZVI composite showed significantly higher efficiency in Cr(VI) removal compared to RBC or nZVI alone, due to a synergistic effect between RBC600 and nZVI on the reduction reaction of Cr(VI) and increased adsorption sites. This research provides a new approach for utilizing ramie waste and effectively addresses the limitations of nZVI for efficient and rapid Cr(VI) remediation.
Article
Engineering, Chemical
Yujun Cheng, Haoran Dong, Tianwei Hao
Summary: In this study, calcium carbonate coated nanoscale zero-valent iron (C-nZVI) was synthesized for Cr(VI) removal. The water chemistry had an influence on C-nZVI reactivity, with NO3 showing a positive effect on C-nZVI contrary to its influence on nZVI.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Giulia Maria Curcio, Elvis Gribaldo Aucancela Rivera, Carlo Limonti, Tiziana Andreoli, Rajandrea Sethi, Alessio Siciliano
Summary: This study investigates the reduction of Cr6+ using zero-valent magnesium (ZVM) in a continuous flow system. The research explores the process kinetics under different operating conditions and examines the effects of inlet Cr6+ concentration, pH, and co-existing ions. The results show that ZVM powder exhibits the highest reactivity and can effectively remove Cr6+ even at higher pH levels.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Liying Ma, Yaguang Du, Shaohua Chen, Dongyun Du, Hengpeng Ye, Tian C. Zhang
Summary: The study successfully synthesized a novel composite, nZVI supported by pinecone biochar (nZVI-PBC), which showed enhanced removal performance for high concentration Cr(VI) in the presence of Shewanella oneidensis MR-1.
Article
Chemistry, Physical
Huijie Lu, Fang Zhu, Huishen Xu, Junxiang Liu, Yuanyuan Wu
Summary: In this study, green synthesis of nano-zero-valent iron and copper (GB-nZVI/Cu) using Ginkgo biloba extract as a reducing agent was reported. Characterizations of nanoparticles were analyzed by SEM, TEM, XRD, and XPS. GB-nZVI/Cu showed better Cr(VI) removal performance compared to apricot leaves synthesized nZVI/Cu (Al-nZVI/Cu) and hawthorn leaves synthesized nZVI/Cu (Hl-nZVI/Cu). GB-nZVI/Cu achieved 97.2% Cr(VI) removal in 30 minutes. Low pH and 313 K favored the reaction, while humic acid (HA) had an inhibitory effect. Coexisting anions promoted the reaction in the order of SO42- > HCO3- > Cl-. The rate constant K-2 increased from 0.0303 to 4.8865 g.mg-1.min(-1) as the concentration of SO42- increased. Na+ and low Mg2+ concentration promoted Cr(VI) removal, while NO3-, K+, Ca2+, and high Mg2+ concentration had negative effects. The removal reaction followed the pseudo-second-order kinetic model with chemical adsorption as the rate-controlling step. Visual MINTEQ models and mechanism studies showed that the removal of Cr(VI) by GB-nZVI/Cu was a combination of adsorption, reduction, and precipitation. The Fe-Cu galvanic cell accelerated the corrosion of Fe-0, enhancing the reduction of Cr(VI). Cu-0/Cu(I) could be oxidized into Cu(II) by receiving electrons from Fe3+, resulting in the generation of Fe2+. Cr(III) finally precipitated as FeXCr1 X(OH) (3) and Cr(OH)(3). GB-nZVI/Cu exhibited superior sedimentation behavior and more Fe2+ production to promote Cr(VI) reduction. GB-nZVI/Cu maintained better Cr(VI) removal performance than Al-nZVI/Cu and Hl-nZVI/Cu after five reuses.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Environmental Sciences
Yan Xu, Zheming Liu, Kexin Ma, Qingdong Qin
Summary: Nanoscale zero-valent iron (nZVI) based materials are considered as promising materials for groundwater remediation. An improved synthesis method was developed, which increased the iron content and utilization of reactants, leading to improved performance of the material.
Article
Engineering, Environmental
Xin Zhang, Hongxing Xu, Min Xi, Zhixiang Jiang
Summary: Remediation of Cr(VI) pollution by nanoscale zero-valent iron-loaded biochar (nZVI-BC) is a hot research topic. The interaction between natural organic matter (NOM) and Cr(VI) on their adsorption on nZVI-BC was investigated. nZVI-BCs with different ratios of Fe:C were prepared, and the optimal Fe:C ratio was determined to be 3:1. Adsorption experiments showed a strong competitive adsorption between Cr(VI) and NOM. Characterization techniques revealed the mechanisms behind the decreased Cr(VI) reduction and adsorption, as well as the decreased adsorption of NOM.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Jien Ye, Yating Luo, Jiacong Sun, Jiyan Shi
Summary: The study found that bentonite-modified nZVI showed improved efficiency in removing Cr(VI) and enhanced transport performance compared to nZVI. The transport of both materials was negatively correlated with the clay composition in different soils. Besides, modification of nZVI by bentonite reduced toxicity to luminous bacteria and ryegrass, indicating potential for in situ environmental remediation.
Article
Environmental Sciences
Wenxian Chen, Xiangwei Xu, Jinping Cui, Zhenyang Zhou, Yuyuan Yao
Summary: This study developed a novel bifunctional material that can efficiently degrade organic pollutants and eliminate hexavalent chromium. The material exhibited high apparent first-order constant and storage stability, enabling efficient degradation and removal of harmful substances at low temperatures.
Article
Engineering, Chemical
Mengxiang Ye, Chao Zhang, Zhenzhen Liu, Huaimeng Li, Zhen Fu, Haimin Zhang, Guozhong Wang, Yunxia Zhang
Summary: The conversion of e-waste into high-performance catalysts offers an economical solution for the degradation of bisphenol A (BPA). In this study, CuAu bimetallic catalysts were electro-codeposited on carbon cloth (CC) with waste central processing unit (CPU) leachate as the electrolyte. The resulting CuAu/CC composites were efficient electro-catalysts for the decontamination of BPA via the electro-Fenton process. The optimized CuAu/CC electrodes achieved 99.5% BPA removal and 64.2% total organic carbon (TOC) removal within 120 minutes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Kun Zhao, Weiying Pang, Shuaiyu Jiang, Canyu Hu, Porun Liu, Dandan Cui, Xuefei An, Baojuan Tian, Chao Gao, Pan Zhang, Meng Tian, Dong Fu, Huijun Zhao
Summary: The coordination of oxygen atoms induces the reconstruction of catalytic sites, which is crucial for understanding the mechanism in dynamic catalytic processes. We demonstrated that the reconstructed catalytic sites on Co (CoP) surface showed improved activity and selectivity for photocatalytic CO2 reduction. In-situ Raman spectroscopy revealed the formation of reconstructive Co-O bond and the appearance of intermediate CO, providing insights into the relationship between catalytic site structure and photocatalytic properties. Density functional theory calculations further showed that the electronic structure of reconstructive surface sites enhanced the ability of CO2 adsorption and CO desorption, leading to reduced barrier energy for the rate-determining step and improved CO2 reduction performance.
Article
Chemistry, Multidisciplinary
Wenchao Li, Xinyuan Zhang, Hongjian Zhou, Zidan Zou, Yue Shen, Guozhong Wang
Summary: A pompon-like magnesium foliar fertilizer with high adhesion capacity and good sustained-release ability was developed through an innovative method, providing a solution to the worldwide problem of magnesium deficiency in agriculture.
ENVIRONMENTAL SCIENCE-NANO
(2023)
Article
Green & Sustainable Science & Technology
Shengbo Zhang, Miaomiao Han, Tongfei Shi, Haimin Zhang, Yue Lin, Xusheng Zheng, Li Rong Zheng, Hongjian Zhou, Chun Chen, Yunxia Zhang, Guozhong Wang, Huajie Yin, Huijun Zhao
Summary: This research utilizes bacterial cellulose with rich oxygen functional groups to anchor iron and cobalt, realizing high density, atomically dispersed bimetallic active sites. The designed catalyst achieves remarkable ammonia yield rate and Faradaic efficiency.
NATURE SUSTAINABILITY
(2023)
Article
Chemistry, Multidisciplinary
J. Y. Wang, L. P. Sun, Q. Li, L. H. Huo, H. Zhao
Summary: Replacing the sluggish oxygen evolution reaction with methanol oxidation reaction is an effective strategy to improve the efficiency of hydrogen evolution reaction while obtaining valuable by-products.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Energy & Fuels
Linzhou Zhu, Jiapeng Ji, Huajie Yin, Huijun Zhao
Summary: In this study, a Cl- terminated MXene (Ti3C2Cl2) with high Cl- capacity and low Cl- diffusion barrier was synthesized as a cathode material for chloride-ion hybrid capacitors (CHCs). The Ti3C2Cl2 electrode exhibited a gravimetric capacity of 536 mAh center dot g-1 and a Coulombic efficiency of >99.5% after 1000 cycles of charge and discharge at a current density of 0.2 A center dot g-1. It also showed superior rate capability of 153.1 mAh center dot g-1 at 1 A center dot g-1 and 121.2 mAh center dot g-1 at 2 A center dot g-1, respectively.
Correction
Energy & Fuels
Linzhou Zhu, Jiapeng Ji, Huajie Yin, Huijun Zhao
Article
Chemistry, Physical
Yue Shen, Chun Chen, Zidan Zou, Zhi Hu, Zhen Fu, Wenchao Li, Shenglong Pan, Yunxia Zhang, Haimin Zhang, Zhixin Yu, Huijun Zhao, Guozhong Wang
Summary: Exploring the interactions among doping heteroatom, carbon and metal atoms can significantly enhance the catalytic performance and gain an insightful understanding of the heterogeneous catalysis mechanism. The N,P co-doped carbon-coated cobalt (Co@NPC) catalyst exhibits high selectivity and water-durability in aqueous-phase hydrogenation of cinnamaldehyde, with precise control of products by adjusting N and P doping. The synergy of geometry and electrons in Co@NPC di-heteroatoms allows for selective reduction of C=O, while Co@NC without P doping shows high activity but significant productivity of saturated alcohols under equivalent conditions. The electronegativity difference among N, C and P atoms enables interaction between electrons, adjusting the chemical states of the active metal and enhancing catalytic performance in hydrogenation.
JOURNAL OF CATALYSIS
(2023)
Review
Materials Science, Multidisciplinary
Weiying Pang, Shuaiyu Jiang, Yanli Sun, YuLin Zhong, Pan Zhang, Jiyu Zhou, Dong Fu, Kun Zhao, Huijun Zhao
Summary: The Ruthenium-Cobalt photocatalytic system (RCPS) is a leading candidate for integrating homocatalysis and heterocatalysis, and has gained significant research attention in photocatalytic CO2 reduction reaction (PCO2RR). The coordination environment of the catalytic site and the efficiency of electron transfer are crucial in determining the reaction pathways in PCO2RR, highlighting the importance of evaluating and guiding PCO2RR. This comprehensive review aims to provide a systematic examination of RCPS in CO2 reduction, discussing recent progress on the coordination effect of Ru-Co in homogeneous and heterogeneous photocatalysis systems. The review also covers advanced characterization techniques, challenges in first-principal density functional theory, and future perspectives for RCPS research.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Multidisciplinary Sciences
Boqing Liu, Tanju Yildirim, Tieyu Lu, Elena Blundo, Li Wang, Lixue Jiang, Hongshuai Zou, Lijun Zhang, Huijun Zhao, Zongyou Yin, Fangbao Tian, Antonio Polimeni, Yuerui Lu
Summary: In this study, a variant of Plateau's law was observed in networks of atomically thin domes made of solid two-dimensional transition metal dichalcogenides (TMDs). Significant surface tension differences resulting from layer-dependent van der Waals (vdWs) interaction energies manifest in a fundamentally variant nature of the law.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Wenchao Li, Hongjian Zhou, Xinyuan Zhang, Zeyang Li, Zidan Zou, Yue Shen, Guozhong Wang
Summary: An oxidation-resistant silicon nanosystem combined with vitamin C was developed as an intelligent controlled ferrous foliar fertilizer to overcome the limitations of traditional ferrous foliar fertilizers. This new fertilizer showed excellent antioxidant capacity, foliar adhesion efficiency, fertilizer utilization efficiency, slow-release behavior, and biocompatibility. It effectively corrected iron deficiency in crops and increased crop yield. This research provides a feasible way to achieve green and safe iron supplementation for crops, reduce fertilizer waste, avoid soil pollution, and promote sustainable development in modern nanoagriculture.
Article
Chemistry, Multidisciplinary
Ming Zhou, Tianling Li, Kaicai Fan, Yajie Shu, Porun Liu, Huijun Zhao
Summary: The ability to monitor ammonium/ammonia levels in coastal waters in real-time and continuously is crucial for assessing the impact of eutrophication on ecosystems. In this study, a membrane-based conductometric ammonia sensing probe (CASP) was used to monitor ammonia levels in coastal waters. The use of a boric acid/glycerol receiving phase helped overcome the analytical errors caused by high salinity. The findings showed that CASP can accurately monitor the dynamic changes in ammonia concentration in coastal waters over an extended period of time.
Review
Chemistry, Multidisciplinary
Yajie Shu, Mengqing Hu, Ming Zhou, Huajie Yin, Porun Liu, Haimin Zhang, Huijun Zhao
Summary: The global water crisis is a pressing challenge, and cost-effective and environmentally friendly water remediation technologies are crucial. Electrochemical advanced oxidation processes (EAOPs) using reactive species for oxidation have shown promise for on-site treatment of water with organic contaminants. Recent progress in nanotechnology has led to research on efficient and durable electrocatalysts/electrodes for EAOPs. This review provides an overview of wastewater treatment using electrochemical technologies, particularly EAOPs, and evaluates the state-of-the-art electrocatalysts and their impacts on efficiency, stability, and selectivity.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Hui Xu, Shengbo Zhang, Xinyuan Zhang, Min Xu, Miaomiao Han, Li Rong Zheng, Yunxia Zhang, Guozhong Wang, Haimin Zhang, Huijun Zhao
Summary: The integration of oxygen-coordinated Fe single atoms and atom clusters using a tandem impregnation-pyrolysis-etching strategy shows superior electrocatalytic activity and selectivity towards two-electron oxygen reduction reaction (2e(-) ORR) to hydrogen peroxide (H2O2). The FeSAs/ACs-BCC electrocatalyst exhibits high-efficiency H2O2 production and coupling with electro-Fenton process for ethylene glycol valorization.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Ecology
Taicheng An, Yiwei Cai, Guiying Li, Shaoting Li, Po Keung Wong, Jianhua Guo, Huijun Zhao
Summary: Due to the widespread use of antibiotics, aquaculture farms have become a significant source of antibiotic resistance genes. This study investigated the prevalence and transmission risk of colistin and multidrug resistance in aquaculture water samples from southern China. The results showed that colistin resistance genes and antibiotic resistance genes were present in all samples, and most types of antibiotic resistance were transmissible between bacterial communities. The study also identified diverse multidrug-resistant bacteria, including a strain with high-level colistin resistance.
ISME COMMUNICATIONS
(2023)