CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Jing Xu,Xiangyi Shen,Duanli Wang,Chuxuan Zhao,Zizheng Liu,Ivan P. Pozdnyakov,Feng Wu,Jun Xia
The usage of p -arsanilic acid (ASA) in livestock and poultry farms leads to its release into the environment. The phototransformation of ASA generates toxic inorganic arsenic species and organic by-products, which affects the water security of the peripheral river basin. In this work, we have investigated the pH-dependent kinetics and mechanisms of ASA photolysis under Ultraviolet-C (UV-C) light (254 nm) irradiation in the pH range 1–11 in the absence of oxygen. The degradation rate of ASA, the ratio of the generated inorganic arsenic species, and the amount of primary organic by-products were determined under the aforesaid conditions. Our results clearly showed the pH-dependent photochemistry of ASA. The photolysis rate was low under acidic conditions, and As(III) and p -aminophenol were the main products. With increasing pH, the photolysis rate increased significantly, and As(V) and aniline became the main products. A pH-based kinetic model has been established that allows prediction of the generation rates of As(III), As(V), p -aminophenol, and aniline according to the photolysis rate of ASA.
研究领域:
环境科学
·
化学动力学
✓ 已验证
产品关联
DOI
高影响因子
Energy Technology
·
2025
·
IF 3.6
Yueqin Zhao,Yuxin Sun,Liuyun Chen,Xianjun Yang,Pengfei Yang,Xinling Xie,Zuzeng Qin,Hongbing Ji,Tongming Su
Photocatalytic hydrogen production from water splitting is a promising technology for overcoming energy and environmental issues. Herein, Mn 0.4 Cd 0.6 S/CuS composites were constructed for photocatalytic hydrogen production. The amount of CuS is optimized, and the composition and structure of the Mn 0.4 Cd 0.6 S/CuS composite are investigated via various characterization techniques. The formation of a p–n heterojunction between Mn 0.4 Cd 0.6 S and CuS and the built-in electric field improve the separation efficiency of photogenerated electrons and holes and enhance the performance of photocatalytic hydrogen production. When the content of CuS is 5 wt%, Mn 0.4 Cd 0.6 S/5CuS presents the best photocatalytic hydrogen production rate of 22.10 mmol h −1 g −1 , which is 3.0 times greater than that of Mn 0.4 Cd 0.6 S, and the apparent quantum yield reaches 7.82% at 400 nm. Combined with the activity test and characterization results, the reaction mechanism of photocatalytic hydrogen production over the Mn 0.4 Cd 0.6 S/CuS composite is proposed.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2017
·
IF 2.659
Meifeng Hao,Mingshu Xiao,Yuhua Yan,Yuqing Miao
The ability to manipulate the morphology and structure of core-shell materials on a micro/nano scale can further control their physical and chemical properties, leading to the wider applications. Herein, the conventional electroless deposition technique for metal alloy films on solid substrates was adapted to synthesize the Ni-P micro/nano-composites in solution under high temperature and high pressure through the hydrothermal method. The obtained amorphous Ni-P composites exhibit perfect roundness with the multilayer structure of concentric circle. By controlling the erosion condition in HNO 3 , the special embryo-like structure was obtained where a solid microsphere is encircled by a layer of hollow globular ultrathin film with the thickness smaller than 50 nm. A round hole opens on the surface of the embryo-like structure. The reaction or formation mechanism was tentatively discussed. The methods can be used to produce the special micro-/nano-structures of metal phosphide.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Coatings
·
2017
·Vol. 7
·期 1
·16
·
IF 2.175
Hejie Yang,Yimin Gao,Weichao Qin
The corrosion behavior of Ni-P coating deposited on 3003 aluminum alloy in flue gas condensate was investigated by electrochemical approaches. The results indicated that nitrite acted as a corrosion inhibitor. The inhibiting effect of nitrite was reduced in solutions containing sulfate or nitrate. Chloride and sulfate accelerated the corrosion of Ni-P coatings greatly. This can provide important information for the researchers to develop special Ni-P coatings with high corrosion resistance in the flue gas condensate.Keywords:electroless Ni-P coating;anion;3003 aluminum alloy;flue gas condensate;pitting corrosion
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Yanjun Liu,Ping Na,Jitao Chen,Yulong Xie
K 2 Zn 3 [Fe(CN) 6 ] 2 @ Ni-P (KNiP) composites with high cesium selectivity were synthesized for the first time. Nickel phosphorus (NiP) was used as a solid base for the adsorption of K 2 Zn 3 [Fe(CN) 6 ] 2 (KZnHCF). The synthesized KNiP composites were characterized by SEM, TEM, XRD , VSM and BET. The characteristic results demonstrated that the composites possess a ball-shape structure, a large surface area of 305.031 m 2 /g and high saturation magnetization of 2.95 emu/g. The ICP-OES analyser was used to determine the concentration of ions in this study. KNiP showed good cesium adsorption performance over a wide pH range and high selectivity for cesium over coexistent competing ions. Analysis of dynamics showed that KNiP has good adsorption performance toward cesium, with an adsorption capacity of 54.95 mg/g. Equilibrium was achieved within only two hours and the experimental data fit the Pseudo second-order model, indicating that the adsorption process was chemisorption . The adsorption process followed the Freundlich isotherm model, indicating that it mainly occured on a heterogeneous surface.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Environmental Technology & Innovation
·
2020
·
IF 3.356
Chao Zhu,Zarak Mahmood,Abdul Saboor Arshad,Jia Liu,Hongrui Ma
Wastewater treatment has become a major global issue due of undegradable pollutants. As toxic water pollutants , namely o-toluidine and p-toluidine are difficult to treat, this study uses the silicon rubber technology to treat them. A pair of modules having single tabular nonporous silicon rubber tube and HCl stripping solution were set up to extract o-toluidine and p-toluidine from high-saline wastewater. Reaction quotient ( Q C ) was calculated after every 12 h intervals to evaluate the equilibrium reaction. The effect of concentration, pH, temperature, ionic strength, and flow rate on the permeability (P) and removal efficiency ( η ) were investigated to illustrate the process parameters and mechanisms of recovery of both elements from wastewater. The results showed that the recovery efficiency was more than 96% with concentration of 2–10g/L. When pH of the extraction solution was 2 or less, the pollutant permeability efficiency was nearly 95%. Moreover, when the salting strength was over 10%, the recovery efficiency increased quickly to some extent. Permeability, which mainly influenced by membrane resistance and desorption rate, initially increased and then decreased when the water flow increased from 2 and 20 mL/min. Aging of silicon rubber tube was also studied with respect to salinity , temperature, and acidity. Acidity and temperature was found to have a significant effect on the tube, permeability increased with an increase in aging, and aging had a minor effect on the elastic properties of the silicon rubber tube. Absorption and diffusion of water in silicon rubber tubes decreased when salinity increased more than 10%, which increased separation of p-toluidine and water. Due to this, there is no need of desalination before membrane extraction in treatment of p-toluidine wastewater with high saline. Thus, this study demonstrates that membrane extraction is a highly energy-efficient process for the effective recovery of o-toluidine and p-toluidine from wastewater with high salinity.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2012
·Vol. 15
·期 3
·560-569
·
IF 3.842
Zhifeng Jiang,Jimin Xie,Deli Jiang,Xiaojun Wei,Min Chen
Nickel nanoparticles with different sizes and morphologies were prepared with nickel chloride as the source of nickel and hydrazine hydrate as a reductant. Cetyltrimethyl ammonium bromide (CTAB), polyethylene glycol-10000 (PEG-10000), gelatin and their composites were used as modifiers in this research. The particles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM) and Fourier transform infrared (FTIR). The effect of using single modifiers and their composites was investigated. The results revealed that the kind of modifier used had a significant effect on the morphology and size of the Ni nanostructure. The possible formation mechanism of nickel nanoparticles was also investigated. All of the formed nickel nanoparticles showed excellent catalytic activity in the reduction of p-nitrophenol compared to the commercial RANEY® Ni. The catalytic activity of nickel particles prepared in the presence of composite modifiers was higher than nano nickel catalysts prepared in the presence of single modifiers. The magnetic property, possible catalytic mechanism and the possibility of reusability were also investigated.
研究领域:
材料科学
·
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2014
·Vol. 18
·期 10
·2693-2699
·
IF 2.234
Cui Jingjie,Chen Shaowei,Liu Hong,Huang Zhen
6-Phosphate aminopurine ( 6 PA), a purine analog, is usually used in clinical anticancer treatment and biochemical research. Up to now, to the best of our knowledge, no literature about the electrochemical behaviors of 6 PA has been reported. In this study, nano-p–n junction heterostructures based on TiO 2 nanobelts were produced by the assembly of p-type semiconducting NiO nanoparticles onto the n-type surface-coarsened TiO 2 nanobelts. The electrochemical behaviors of 6 PA were investigated by different voltammetric techniques in a phosphate buffer solution of pH 7.4 using the heterostructures as the sensing electrode. Compared with single-phase TiO 2 nanobelt electrodes, the resulting chemically modified electrodes exhibited higher surface accumulation ability and enhanced electrocatalytic activities in the oxidation for 6 PA, with an irreversible oxidation peak at +0.91 V. It is proposed that the nano-p–n junction heterostructures played an important role in the enhancement of charge transport in the sensing electrodes. The results suggest that the nanoengineered TiO 2 nanobelts might be a promising candidate for biosensing applications of nucleic acid drugs that will be of significance to diagnostic medicine and molecular biology research.
研究领域:
生物医学工程
·
分析化学
·
分子生物学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Lingjiao Li,Jing Xu,Sheng Zhao,Min Mao,Xuanhao Li
With the development of research on the photocatalytic water splitting and hydrogen (H 2 ) precipitation, cobalt ferrite and molybdate have begun to appear as catalysts for the study of photocatalytic hydrogen precipitation. In this paper, the p-n heterojunction CoFe 2 O 4 /NiMoO 4 (CFO/NMO) is prepared by hydrothermal method . The constructed p-n type (type Ⅱ) heterojunction CFO/NMO has the highest hydrogen evolution (Eosin Y as a sensitizer), which is 7.39 times and 1.95 times that of elemental CFO and NMO, respectively. After the CFO and NMO form a heterojunction, a built-in electric field is formed inside to effectively separate the photogenerated carriers . At the same time, the dense interface of the heterojunction also promotes the transfer of photogenerated carriers and promotes the reduction of H + protons on this catalyst surface . In short, this work provides more possibilities for the field of photocatalytic hydrogen evolution from molybdate and cobalt ferrite compounds.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2019
·
IF 3.206
Yinhui Yi,Lirong Liu,Wei Zeng,Baohe Lv,Gangbing Zhu
Being awfully harmful to the environment and human health, the sensitive and selective determination of p-dihydroxybenzene (p-DHB) in environmental water is of great significance. However, the similar structures and properties of p-DHB with catechol (CC; one p-DHB isomer) make the selective and reliable determination of p-DHB from CC in environmental waters being still a formidable challenge. In this manuscript, by preparing CC stabilized silicon quantum dots (C-SiQDs) via a simple hydrothermal process and using C-SiQDs simultaneously as a catalyst and fluorescence indicator, a novel nanosensing platform was successfully developed to selectively and sensitively detect p-DHB with double signals: fluorescence and colorimetric. For detecting p-DHB, C-SiQDs could catalyze the oxidation of p-DHB to form benzoquinone (BQ), an intermediate, which lead to the color change from pale yellow to dark brown and the efficient quenching the fluorescence of C-SiQDs. While for CC in samples, it could not contact C-SiQDs surface due to the great steric hindrance effect from CC on quantum dots surface, thus restricting the oxidation of CC and production of BQ, and leading that the obtained C-SiQDs have no response towards CC. Meanwhile, the developed nanosensor could also avoid various other possible interferences. Under optimized conditions, wide linear ranges (from 0.01 μM to 50.0 μM) and low detection limits (4.0 nM) were obtained for p-DHB. The simple and reliable C-SiQDs-based double signals proposal demonstrated to be potentially applicable for the highly selective and sensitive detection of trace p-DHB in various environmental water samples.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2022
·Vol. 14
·期 17
·1721-1729
·
IF 3.532
Di Deng,Xiaoyu Fang,Ding Duan,Kang Li
There is a critical need for the rapid detection of p-chlorophenol produced by pesticide abuse and industrial wastewater discharge, which has been an urgent problem in the realm of environmental protection. Here, a green and environmentally friendly method was developed to prepare stable and low toxicity quantum dots. First, blue-green fluorescent FeS2 quantum dots (B-FeS2 QDs) were prepared with FeCl3·6H2O (an iron source) and L-cysteine (a capping agent) by the solvothermal method. By combining B-FeS2 QDs with orange carbon dots (O-CDs), a CDs@SiO2/FeS2@MIPs visual fluorescence sensor for the selective detection of p-chlorophenol was constructed. Under optimum conditions, this sensor exhibited a detection limit of 1.265 μM with a linear range of 5.00–50.00 μM and was successfully applied to detect p-chlorophenol in real samples. Moreover, this sensor was successfully applied to visual semi-quantitative detection of p-chlorophenol. This work demonstrated that these sensors, based on FeS2 QDs and CDs, had potentials for in situ and visual detection of environmental contaminants.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Gang Chu,Wangmin Wang,Yang Dou,Kai Sun,Wenxiu Qin,Zhen Wang,Youbin Si
Pyrogenic carbon (PC) including black carbons and engineered carbons can mediate the extracellular electron transfer to facilitate the biogeochemical reaction with organic pollutants. Yet, the role of carbon structures and iron minerals on PC-mediated microbial degradation is still lacking of understanding. Herein, we studied the electrochemical properties of PCs produced from varied feedstock with regards to the mediated degradation of p -nitrophenol (PNP) by Shewanella putrefaciens CN32 in anoxic system. Mediated degradation by PCs was enhanced by facilitating extracellular electron transfer through oxygenated group and graphitic structure. Graphitic crystallites improved the electron-accepting capacity (as suggested by I D /I G and EAC) and diminished the electrochemical impedance (as suggested by Rct), contributing to PNP degradation under the anoxic system. Furthermore, more interfacial adsorption was conducive to the mediated reduction by the graphitic structure on PCs of high-temperature. In the presence of iron minerals, both hematite and goethite significantly facilitated PC-mediated degradation, which could be ascribed to the enhancement of the electron-donating capacity of microorganism and the accumulation of the reductive-state PCs by the interaction with generated Fe(II). This work paves a feasible way to the technical design on the remediation of phenolic contaminants by PC-mediated microbial degradation in environment.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）