ELECTROCHIMICA ACTA
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2024
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IF 5.5
Yuanjia Ma,Xiao Yang
This work focuses on the electrochemical reduction behavior of PO 4 3– ions in molten CaCl 2 at 1123 K, aiming to develop a next-generation process for producing white phosphorus (P 4 ) through electrolysis of dissolved PO 4 3– . Results from cyclic voltammetry indicate a shift for the electrochemical reduction of PO 4 3– from a reversible reaction to a quasi-reversible one as the potential scan rate increases. The detachment rate of P 4 gas was found to be higher at the graphite electrode compared to Mo and W electrodes. The apparent diffusion coefficient of PO 4 3– , determined from chronoamperometry and chronopotentiometry at a graphite electrode, ranges from 1.43 to 2.26 × 10 –4 cm 2 s –1 . Additionally, an increase in the concentration of O 2– was found to decrease the detachment rate of P 4 gas, likely due to changes in the melt's physical properties. However, the increase in O 2– up to 0.30 mol% does not significantly affect the diffusion of PO 4 3– . This study provides valuable insights into the electrochemistry of PO 4 3– in molten CaCl 2 and offers a theoretical guidance for the technology development of P 4 production through electrolysis.
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ACS ES&T Water
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2025
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IF 4.3
Yu Zhang,Yuan Zhuang,Yuhao Liu,Baoyou Shi
In the drinking water pipeline, PO43– and iron particles will inevitably coexist, but their effects on water quality are not fully clear. Here, PO43– was shown to inhibit the formation of disinfection byproducts (DBPs) in ductile cast iron pipe (decreases of 8.7%–29.8%). The inhibition effects were proved to be related to particle structure changes induced by PO43–. The PO43– influenced particles had lower roughness, smaller particle size, and a larger amount of negative charge. In the beaker without iron, the concentration of PO43– remained nearly consistent with the initial concentration, oscillating around 1.5 mg/L, whereas the PO43– concentration in the group containing Fe(II) exhibited a notable decline, reaching 1.28 mg/L. Thus, PO43– did not play a direct role in the formation of DBPs, but modulated the physicochemical behavior of water and the characteristics of particles. Therefore, when iron corrosion occurs in drinking water distribution systems (DWDSs), PO43– has the ability to inhibit the formation of DBPs, but other water quality issues should be considered at the same time. This study not only explains how PO43– affects the formation of DBPs in DWDSs, but also provides new thinking on how to control the risk of DBP exposure in DWDSs, which is worthy of further research.
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Journal of Materials Research and Technology-JMR&T
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2024
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IF 6.2
Yahao Geng,Shan Zhang,Yuying Wang,Shuochao You,Jing Cui,Guiyong Xiao
Hydroxyapatite (HAP), as an inorganic material with the biocompatible and bioactive, widely exists in hard tissues such as teeth and bones of mammals. However, the inherent brittleness of traditional HAP severely limits its clinical applications in load-bearing. HAP ultralong nanofibers with good flexibility can overcome this problem due to their high aspect ratio. In this work, the highly ordered HAP nanofibers are successfully synthesized by the calcium oleate precursor solvothermal method. The effects of ratio of PO 4 3− and CO 3 2− on the microstructure, orientation degree, and properties are researched. The results show that the arrangement of HAP nanofibers first changes from loose state to ordered dense structure, then to ordered loose form, and finally to disordered nanofibers with the increase of the PO 4 3− /CO 3 2− ratio. Meanwhile, the chemical composition, crystallinity, and thermal stability also change because of various PO 4 3− /CO 3 2− . In addition, the formation mechanism of highly ordered HAP nanofibers is explored as well in this work. Besides, the HAP ultralong nanofibers prepared by solvothermal method can be designed into advanced functional materials with highly ordered structures, which is expected to overcome the limitation of its difficult application in the load-bearing field.
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TALANTA
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2012
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IF 3.794
Guangke He,Liang Zhao,Kai Chen,Yuanyuan Liu,Hongjun Zhu
A rapid, simple and real-time colorimetric assay for detecting phosphate anions (PO 4 3− ) in aqueous solution was developed. The method was based on a novel functionalized gold nanoparticles (MPTP-Zn-AuNPs), which was synthesized by the ligand-exchange reaction of 4′-(4-mercaptophenyl)-2,2′:6′,2″-terpyridine zinc(II) complex (MPTP-Zn) with citrate-stabilized aqueous AuNPs. The strong coordination between MPTP-Zn-AuNPs and PO 4 3− anion gave rise to a color change from wine-red to blue-gray that was discernible by the naked eye and an easily measurable alteration in the absorption spectrum of the particles in aqueous solution. And the new technique exhibited the high selectivity for PO 4 3− over 11 other anions and could be used to determine PO 4 3− with a detection limit of 11 ppm.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Chao Guo,Lina Chen,Rui Yao,Jinping Li,Guang Liu
Lewis-basic PO 4 3− regulates interfacial water on CoWO 4 for neutral OER. • PO 4 3− -CoWO 4 reaches 330 mV at 10 mA cm −2 and operates stably for 250 h. • PO 4 3− increases interfacial free water and promotes water dissociation. • Enhanced surface *OH coverage accelerates neutral OER kinetics. • PO 4 3− suppresses Co/W leaching and improves catalyst stability. In neutral water electrolysis, the intrinsically low OH − concentration compels the oxygen evolution reaction (OER) to proceed via an additional water dissociation step, leading to sluggish kinetics and high overpotential, which poses a challenge for efficient catalyst design. Introducing Lewis base sites on the catalyst surface can act as proton acceptors, accelerating H OH bond cleavage and thereby promoting the generation and accumulation of *OH. Herein, we incorporated the Lewis base PO 4 3− into CoWO 4 to construct a self-supporting PO 4 3− -CoWO 4 electrode. The incorporated PO 4 3− engages in electronic interactions with Co/W active sites, modulating the local electronic structure. Electrochemical tests demonstrate that PO 4 3− -CoWO 4 exhibits outstanding OER performance in 1 M phosphate buffer solution (PBS), achieving an overpotential of only 330 mV at 10 mA cm −2 and stable operation over 250 h. Mechanistic studies reveal that PO 4 3− optimizes the interfacial water on CoWO 4 , increases the fraction of free water, facilitates water dissociation, and enhances the surface *OH coverage. Moreover, it effectively suppresses the leaching of active Co/W species during OER, thereby improving the structural stability of the catalyst. This interfacial regulation by PO 4 3− synergistically boosts the activity and stability of neutral OER, providing new insights for designing highly efficient neutral water electrolysis catalysts. Lewis base PO 4 3− accelerates water dissociation on CoWO 4 , enabling neutral OER with an overpotential of 330 mV and 250 h durability. Download: Download high-res image (154KB) Download: Download full-size image
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2018
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IF 2.88
Qingming Wang,Yingzi Tan,Nianhua Wang,Zhixiang Lu,Wenling Wang
A fluorescence probe based on thiosemicarbazide has been synthesized and well characterized by 1 H NMR, 13 C NMR, Elemental analysis , Electrospray ionization mass spectra . The probe 1 functions as a multitarget ion sensor, detect biologically and ecologically important Cd 2+ , PO 4 3− and Cr 3+ . Meanwhile, probe 1 displays selectivity for Cd 2+ over other metal ions and anions in DMF by emission spectrum. Interestingly, probe 1 has been explored to recognize PO 4 3− in CH 3 OH-H 2 O ( v : v = 1:9). The binding stoichiometry of probe 1 with Cd 2+ and PO 4 3− are 2:1 and 1:1, respectively, which are confirmed by Electrospray ionization mass spectra. Probe 1 is selective, sensitive and reversibility/reusability to Cd 2+ and PO 4 3− with the detection limit as low as 0.035 μM and 0.011 μM respectively. Besides, the designed probe 1 has shown potential applications in the area of photo-printing.
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PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
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2022
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IF 4.889
Lele Yang,Hong Chen,Yuntao Xu,Rong Qian,Qiao Chen,Yuanxing Fang
The efficiency of hydrogen peroxide evolution reaction (H 2 O 2 ER) by photoanodic water oxidation is normally limited by low yield and poor selectivity. In this work, the surfaces of Mo doped BiVO 4 are modified by Co 2+ and PO 4 3- ions (CPMB), which has been used as the photoanode with improved H 2 O 2 yield and selectivity. The optimal evolution rate of the CPMB is ca. 0.23 µmol·min −1 ·cm −2 , corresponding to 2.5 times to the pristine BiVO 4 photoanode, and the faradaic efficiency of CPMB photoanode for H 2 O 2 ER is ca. 26%. In this study, the mechanism for the improved H 2 O 2 evolution performance of CPMB has been investigated, indicating that PO 4 3- ions mainly promote the formation of the •OH by dissociation of H 2 O, while Co 2+ ions accelerate the conversion of the •OH for the subsequent H 2 O 2 evolution. This study offers the strategy for designing an efficient photoelectrochemical system with optimized solar conversion efficiency for H 2 O 2 production.
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TETRAHEDRON
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2017
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IF 2.651
Renjie Liu,Xu Tang,Yun Wang,Juan Han,Huiqin Zhang,Chen Li,Wenli Zhang,Liang Ni,Haoran Li
A novel fluorescent probe XDS based on 4-methylumbelliferone and 2-picolylamine platforms has been designed and synthesized, which behaves fast relay recognition of Fe 3+ and PO 4 3− via a fluorescence “on−off−on” response signal. Probe XDS exhibited very high sensitivity and unique selectivity for Fe 3+ over other common metal ions , and the detection limit of was 3.2 × 10 −7 M. Moreover, the addition of the PO 4 3− ions could cause the recovery of fluorescence. This relay recognition feature of probe XDS has potential applications in the determination of trace amount of Fe 3+ and PO 4 3− in environmental systems. Interestingly, fluorescence imaging experiments demonstrated that the probe XDS can also be used to monitoring the intracellular Fe 3+ in RAMOS cells.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2021
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IF 2.694
Qing Hao,Huan Zhou,Mengli Zhang,Si Wu,Junfang Yang
Rare-earth ore concentrate is calcined at high temperature by the alkaline method, and the associated elements fluorine and phosphorus are enriched in the form of sodium fluoride and sodium phosphate in water elution. To separate and recover fluorine and phosphorus from the aqueous solution, the solid–liquid equilibrium behaviors of the quaternary systems Na+//F–, CO32–, PO43–-H2O and their two sub-ternary systems NaF-Na3PO4-H2O and Na2CO3-Na3PO4-H2O at 313.15 K were studied via the isothermal solubility phase equilibrium method. Solubility data, liquid density and pH, two complete isothermal phase diagrams of the ternary system, and one complete isothermal phase diagram of the quaternary system were obtained. The results showed that two double salts NaF·2Na3PO4·19H2O and Na3PO4·3Na2CO3·8H2O occurred in the respective ternary systems. Five solid species of one anhydrous salt of NaF, two hydrous salts of Na2CO3·H2O and Na3PO4·12H2O, and two double salts of Na3PO4·3Na2CO3·8H2O and NaF·2Na3PO4·19H2O were found in the quaternary system. The phase diagram of the quaternary system consisted of three invariant points, five crystallization regions, and seven univariate curves. Na3PO4 easily combined with NaF to form double salt NaF·2Na3PO4·19H2O, which occupied a larger phase region in the quaternary phase diagram. The increase in Na2CO3 will lead to the decrease in the solubility of Na3PO4 and NaF in the system.
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ACS Applied Polymer Materials
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2024
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IF 4.4
Jun Liao,Congcong Ding,Junping Shi,Liang Jiang,Qiuyi Wang,Lielin Wang
The application of chitosan-based materials for the separation of uranium from wastewater was limited due to the lack of active sites. In this work, a chitosan-based composite (CaCO3@aCS/PA) was effectively created by modifying chitosan with CaCO3 and phytic acid to enhance the adsorption performance of chitosan materials. CaCO3@aCS/PA showed no significant changes and no Ca2+ was detected in the solution after stirring for 10 h in a solution with pH > 3, indicating good stability of CaCO3@aCS/PA, which was beneficial for use in adsorption. Moreover, the adsorption capacity and adsorption percentage of CaCO3@aCS/PA for uranium reached 842.0 mg/g (298 K, pH = 4) and 95.4% (C0 = 10 mg/L, pH = 4) and the adsorption equilibrium time was significantly shortened, indicating that the modification with CaCO3 and phytic acid enhanced the adsorption ability of chitosan for uranium, which was related to the synergistic effect of various active sites (CO32–, PO43–, −OH, and –NH2) on CaCO3@aCS/PA for uranium adsorption.
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FUEL
·
2025
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IF 7.5
Taiping Tian,Tao Wang,Xueer Ning,Pengxu Ren,Qian Liu,Dongling Wu
The utilization of coal combustion supports the long-term stable development of the socio-economy, but slagging and ash deposition phenomena constrain its efficient utilization. This study employed a co-precipitation method to prepare a layered PO 4 3− -intercalated magnesium–aluminum hydrotalcite (MAP) additive to improve coal ash fusion characteristics. Combustion experiments demonstrated that the MAP additive significantly increased the ash fusion temperature of Naomaohu coal (NC) (the softening temperature rose from 1161 °C to 1393 °C) while reducing fine particulate matter generation. The mechanisms include: (1) solid-phase reconstruction: promoting the phase transformation of low-melting-point alkaline minerals (e.g., anorthite, nepheline, anhydrite) into high-melting-point crystals (e.g., akermanite, forsterite, magnesium calcium phosphate); (2) ion immobilization: layered phosphates capturing alkali metal ions (Na + , K + ) through ion exchange. The dual mechanisms synergistically altered ash particle distribution: the peak particle size of fine particles (PM 1 ) shifted from 0.03 μm to 1.05 μm, the proportion of coarse particles (PM 2.5 ) increased by 48 %, and the peak distribution expanded from 2.46 μm to 3.64 μm. Concurrently, the surface adhesion of ash was reduced, enhancing dispersion efficiency and effectively inhibiting slagging and ash deposition. The MAP additive exhibits excellent potential for regulating ash fusion behaviour, providing a novel strategy for the clean and efficient utilization of coal.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Hu Huang,Wenxin Gao,Xianbo Li
H 2 SO 4 and H 3 PO 4 are commonly used as depressants for flotation of dolomite from apatite . Unsatisfactorily, the dissociated anions such as SO 4 2- and PO 4 3- may cause trouble to the flotation . In this study, the effect of SO 4 2- , PO 4 3- on the floatability and surface adsorption of dolomite were revealed by experimental and molecular dynamics simulation studies. The results show that SO 4 2- and PO 4 3- , especially PO 4 3- , have a negative effect on flotation of dolomite. The mechanism is that the presence of SO 4 2- and PO 4 3- could inhibit the adsorption of sodium oleate collector on the dolomite surface, and decrease its adsorption capacity. In addition, SO 4 2- and PO 4 3- could react with Ca 2+ to form the hydrophilic CaSO 4 ·2H 2 O and Ca(H 2 PO 4 ) 2 , respectively, the synergistic effect resulted in a decrease in the surface hydrophobicity . As a result, the flotation of dolomite was inhibited. This study clarifies the adverse effects of dissociated anions on dolomite flotation, which also lays a foundation for the targeted removal of these ions in the next step.
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