scispace - formally typeset
Search or ask a question
Author

Jing Xu

Other affiliations: École Normale Supérieure
Bio: Jing Xu is an academic researcher from Wuhan University. The author has contributed to research in topics: Chemistry & Medicine. The author has an hindex of 15, co-authored 36 publications receiving 704 citations. Previous affiliations of Jing Xu include École Normale Supérieure.

Papers published on a yearly basis

Papers
More filters
Journal ArticleDOI
Zizheng Liu1, Shaojie Yang1, Yanan Yuan1, Jing Xu1, Yifan Zhu1, Jinjun Li1, Feng Wu1 
TL;DR: The results suggest that the CoFe2O4S(IV)O2 system has good application prospects in alkaline organic wastewater treatment and was verified to be the main oxidative species responsible for metoprolol degradation.

173 citations

Journal ArticleDOI
TL;DR: Bacterial inactivation by Me(II)/sulfite systems was demonstrated to be a surface-bound oxidative damage process through destructing vital cellular components, such as NADH and proteins, therefore holding great promises for wastewater disinfection.
Abstract: Disinfection is an indispensable process in wastewater treatment plants. New bacterial inactivation technologies are of increasing interest and persistent demand. A category of simple and efficient bactericidal systems have been established in this study, that is, the combination of divalent transition metal (Mn(II), Co(II), Fe(II), or Cu(II)) and sulfite. In these systems, metal catalyzed auto-oxidation of sulfite was manifested to generate reactive intermediary SO4•– that played the major role in Escherichia coli inactivation at pH 5–8.5. Increasing concentrations of metal ion or sulfite, and lower pH, led to higher bacterial deaths. Bacterial inactivation by Me(II)/sulfite systems was demonstrated to be a surface-bound oxidative damage process through destructing vital cellular components, such as NADH and proteins. Additionally, the developed Me(II)/sulfite systems also potently killed other microbial pathogens, that is, Pseudomonas aeruginosa, Bacillus subtilis, and Cu(II)-antibiotic-resistant E. col...

109 citations

Journal ArticleDOI
TL;DR: In this article, the catalytic oxidation of As(III) to As(V) in an iron(III)/sulfite system and the removal of As (V) under visible light using sunlight or a light-emitting diode lamp were investigated.
Abstract: Removal of arsenic in industrial wastewaters proceeds often through oxidation of As(III) to As(V) following by precipitation and/or adsorption. In this work, the catalytic oxidation of As(III) to As(V) in an iron(III)/sulfite system and the removal of As(V) under visible light using sunlight or a light-emitting diode lamp were investigated. Our results show a significant enhancement of efficiency of As(III) oxidation at near-neutral pH, whereas 93% of As(III) was removed from solution by centrifugal treatment after 30 min of irradiation. Mechanism investigations revealed that the pathways of As(III) oxidation at circumneutral pH involved free radicals (mainly HO , SO 4 − and SO 5 − ) and ligand-to-metal charge transfer between As(III) and colloidal ferric hydroxide particles. Sequential addition of sulfite could improve the oxidation efficiency for water having high concentrations of As(III) (i.e., 66.7 μM). These results clearly show that the visible light/iron(III)/sulfite system significantly enhances As(III) oxidation. This finding may have promising implications in developing a new cost-effective technology for the treatment of arsenic-containing water using sunlight.

105 citations

Journal ArticleDOI
TL;DR: In this article, photooxidation of As(III) on nascent colloidal ferric hydroxide (CFH) in aqueous solutions at pH 6 was studied to reveal the transformation mechanism of arsenic species.
Abstract: Contamination of water and soils with arsenic, especially inorganic arsenic, has been one of the most important topics in the fields of environmental science and technology. The interactions between iron and arsenic play a very significant role in the environmental behavior and effect of arsenic species. However, the mechanism of As(III) oxidation in the presence of iron has remained unclear because of the complicated speciation of iron and arsenic. Photooxidation of As(III) on nascent colloidal ferric hydroxide (CFH) in aqueous solutions at pH 6 was studied to reveal the transformation mechanism of arsenic species. Experiments were done by irradiation using light-emitting diodes with a central wavelength of 394 nm. Results show that photooxidation of As(III) and photoreduction of Fe(III) occurred simultaneously under oxic or anoxic conditions. Photooxidation of As(III) in the presence of nascent CFH occurred through electron transfer from As(III) to Fe(III) induced by absorption of radiation into a ligand-to-metal charge-transfer (LMCT) band. The estimated quantum yield of photooxidation of As(III) at 394 nm was (1.023 ± 0.065) × 10(-2). Sunlight-induced photooxidation of As(III) also occurred, implying that photolysis of the CFH-As(III) surface complex could be an important process in environments wherein nascent CFH exists.

96 citations

Journal ArticleDOI
TL;DR: This work provides new mechanistic insight into arsenic and iron redox chemistry in the environment and furthers the understanding of Fenton reactions at neutral pH.

64 citations


Cited by
More filters
Journal ArticleDOI
Jun Li1, Mengjuan Xu1, Gang Yao1, Gang Yao2, Bo Lai1 
TL;DR: The degradation performance of atrazine by peroxymonosulfate (PMS) activated by CoFe2O4 nanoparticles (NPs) in heterogeneous catalytic process was studied in this article.

453 citations

Journal ArticleDOI
TL;DR: The results show that Fe2O3 NPs can replace traditional Fe fertilizers in the cultivation of peanut plants and to the best of the knowledge, this is the first research on the Fe2 omitting iron oxide nanoparticles as the iron fertilizer.
Abstract: Nanomaterials are used in practically every aspect of modern life, including agriculture. The aim of this study was to evaluate the effectiveness of iron oxide nanoparticles (Fe2O3 NPs) as a fertilizer to replace traditional Fe fertilizers, which have various shortcomings. The effects of the Fe2O3 NPs and a chelated-Fe fertilizer (ethylenediaminetetraacetic acid-Fe; EDTA-Fe) fertilizer on the growth and development of peanut (Arachis hypogaea), a crop that is very sensitive to Fe deficiency, were studied in a pot experiment. The results showed that Fe2O3 NPs increased the root length, plant height, biomass, and SPAD values of peanut plants. The Fe2O3 NPs promoted the growth of peanut by regulating phytohormone contents and antioxidant enzyme activity. The Fe contents in peanut plants with Fe2O3 NPs and EDTA-Fe treatments were higher than the control group. We used energy dispersive X-ray spectroscopy (EDS) to quantitatively analyze Fe in the soil. Peanut is usually cultivated in sandy soil, which is readily leached of fertilizers. However, the Fe2O3 NPs adsorbed onto sandy soil and improved the availability of Fe to the plants. Together, these results show that Fe2O3 NPs can replace traditional Fe fertilizers in the cultivation of peanut plants. To the best of our knowledge, this is the first research on the iron oxide nanoparticles as the iron fertilizer.

425 citations

Journal ArticleDOI
TL;DR: In this paper, a review of the development in TiO2 nanostructured materials for visible-light driven photocatalysis is presented, and the effects of various parameters on their photocatalytic efficiency, photodegradation of various organic contaminants present in wastewater, and photocatalyst disinfection are delineated.

420 citations

Journal ArticleDOI
TL;DR: In this paper, the authors highlight the synthetic strategies, characterisation, and computation of carbon-based SACs, and for the first time, showcase their innovative applications in advanced oxidation processes.
Abstract: Emerging single atom catalysts (SACs), especially carbon-based SACs are appealing materials in environmental catalysis because of their ultrahigh performances, environmental friendliness, structural/chemical robustness, and the maximum utilization of active metal sites. The metal centres, carbon matrixes, and coordination characteristics collectively determine the electronic features of carbon-based SACs, and their behaviours in catalysing peroxide activation and efficiencies in advanced oxidation processes (AOPs). However, there is lack of a comprehensive and critical review reporting the successful marriage of carbon-based SACs in AOP-based remediation technologies. It is particularly necessary to systematically compare and reveal the catalytic sites and the associated mechanisms of carbon-based SACs in diverse AOP systems. In this review, we highlight the synthetic strategies, characterisation, and computation of carbon-based SACs, and for the first time, showcase their innovative applications in AOP technologies. We unveil the origins of versatile catalytic oxidation pathways in different AOP systems and the mechanisms of micropollutant degradation over carbon-based SACs, distinguished from the upsized counterparts (metals/oxides and carbon substrates). We also provide directions to the rational design of on-demand SACs for green chemistry and environmental sustainability. Also, we suggest a designated and integrated experimental/theoretical protocol for revealing the structure-catalysis relations of SACs in AOP applications, and propose the prospects for future opportunities and challenges.

395 citations

Journal ArticleDOI
TL;DR: In this paper, a visible light response photocatalyst was synthesized via a simple reduction-oxidation method, and the structure, morphology and optical properties of the catalyst were well characterized.
Abstract: In this study, a visible (Vis) light response photocatalyst was synthesized via a simple reduction–oxidation method. The structure, morphology and optical properties of the catalyst were well characterized. The absorption capability of ZnFe 2 O 4 in visible-light region was demonstrated by the high rate of Orange II decolorization under Vis/ZnFe 2 O 4 /H 2 O 2 process. Guided by studies to explore the effects of radical scavengers and to quantify the yield of hydroxyl radical ( OH) production, OH on the surface of the catalyst was found to be the dominating reactive species for the Orange II removal. Moreover, ZnFe 2 O 4 maintained high activity, crystallinity and extremely low iron and zinc leaching during repeated experiments. The intermediate products were identified by GC–MS and a possible pathway is accordingly proposed to elucidate the mechanism of Orange II degradation by OH. In addition, high extent of mineralization was obtained as the chemical oxygen demand (COD) and total organic carbon (TOC) removal efficiencies were 86.6% and 60.4%, respectively, within 60 min reaction. The toxicity tests with activated sludge indicated that the toxicity of the solution increased during the first 30 min but then decreased significantly as the oxidation proceeded.

348 citations