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.
研究领域:
燃料化学
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燃烧工程
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无机材料化学
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能源利用
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煤清洁利用
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2021
·
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.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
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.
研究领域:
矿物加工工程
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Minwang Laipan,Qingze Chen,Ziyu Wang,Min Zhang,Mengyao Yuan,Runliang Zhu,Luyi Sun
Layered double hydroxides (LDHs) have been considered important sinks for ionic contaminants in nature and effectively engineered adsorbents for environmental remediation. The availability of interlayer active sites of LDHs is critical for their adsorptive ability. However, inorganic LDHs generally have a nano-confined interlayer space of ca. 0.3–0.5 nm, and it is unclear how LDHs can utilize their interlayer active sites during the adsorption process. Thus, LDHs intercalated with SO42–, PO43–, NO3–, Cl–, or CO32– were taken as examples to reveal this unsolved problem during Cd2+ adsorption. New adsorption behaviors and pronounced differences in adsorption performance were observed. Specifically, SO42–/PO43– intercalated LDHs showed a maximum Cd2+ adsorption capacity of 19.2/9.8 times higher than other LDHs. The ligand exchange of H+ (on the surface −OH) by Cd2+ and formation of Cd-SO42–/PO43– complexes led to the efficient removal of Cd2+. Interestingly, interlayer SO42– was demonstrated to be able to move to the edges/outer surfaces of LDHs, providing abundant movable adsorption sites for Cd2+. This novel phenomenon made the SO42– intercalated LDH a superior adsorbent for Cd2+ among the tested LDHs, which also suggests that LDHs with a nano-confined interlayer space can also highly utilize their interlayer active sites based on the mobility of interlayer anions, offering a new method for constructing superior LDH adsorbents.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Xiang Liu,Haoyu Chen,Xiaojun Hu,Jing Liu,Yuee Zhong,Peipei Li,Xiaohua Zhu,Youyu Zhang,Meiling Liu,Shouzhuo Yao
Developing rapid and user-friendly visual techniques for distinguishing and identifying heavy metal ions is a critical pursuit in food and environmental analysis. In this work, a zirconium-based metal organic framework (MOF) known as PCN-222 has been synthesized, serving as a colorimetric nanoplatform for the differentiation and detection of Cd 2+ and Pb 2+ in the presence of PO 4 3- . The remarkable characteristic of PCN-222 stems from its reaction with PO 4 3- , where the robust bonding between PO 4 3- and Zr nodes triggers the collapses of PCN-222, leading to the release of ligands (TCPP) with visible alteration in solution color to light red. When exposure to Cd 2+ and Pb 2+ , shifts to green and yellow, respectively, are discernible. These changes can be ascribed to differences in the size, atomic configuration, and electronegativity of the two metal ions, which impact their interaction with TCPP. The innovative concept of a nanomaterial traffic light is introduced based on these color transitions. Accurate quantification of Cd 2+ and Pb 2+ can be efficiently accomplished both individually and concurrently using UV spectroscopy and a mobile phone APP, providing adaptability in method selection depending on on-site conditions. Moreover, the platform effectively tackles selectivity challenges associated with ligand-based detection methods, showcasing high sensitivity, distinct visual indications, and simplicity in instrumentation requirements.
研究领域:
环境科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Shengwang Mo,Da Song,Yang Li,YuChao Zhou,Zhao-Qing Liu,Zhen Huang,Fang He
Coupling renewable energy with seawater electrolysis for green hydrogen production represents a promising approach in energy storage and conversion. Yet, conventional anodic materials suffer from chloride corrosion and active-site blockage in seawater, causing rapid deactivation at high current densities. It is thus crucial to develop electrode materials with inherent corrosion resistance and high catalytic activity that can sustain operation at ampere-level currents in harsh seawater environments. In this work, we precisely engineered a NiFe layered double hydroxide (LDH) anode functionalized with adsorbed PO43– and SO42– anions. This modified catalyst demonstrates exceptional sustainability-relevant durability, operating continuously for over 140 h at an industrially relevant current density of 1100 mA cm–2 in an alkaline flow cell, while requiring an overpotential of only 201 mV to achieve 100 mA cm–2. Compared to the unmodified sample, the catalyst demonstrates significantly enhanced activity and corrosion resistance. Further mechanistic insights into the oxygen evolution reaction (OER) were gained through in situ spectroscopy and electrochemical differential mass spectrometry (DEMS). In situ Raman spectroscopy captured the dynamic reconstruction of the electrode material, leading to the formation of a stable active phase identified as NiFeOOH/PO43–/SO42–. By combining in situ 18O-isotope-labeled DEMS with ATR-FTIR spectroscopy, the compatibility between the conventional adsorbate evolution mechanism (AEM) and the lattice oxygen mechanism (LOM) during the OER was confirmed. The synergy of these two mechanisms was shown to further enhance the OER performance. The results establish that PO43–/SO42– adsorption plays a dual role: it electrostatically repels Cl– to mitigate corrosion, while simultaneously activating lattice oxygen to promote the LOM pathway, thereby improving surface reactivity. The anion adsorption strategy presented here offers valuable guidance for designing efficient and robust anode materials for seawater electrolysis.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yuanmeng Lou,Zhaotian Ba,Zhaodi Yuan,Jian Li,Cui Li,Lili Ma,Xiujuan Wang,Xin Wen,Pingan Song
The development of carbon fiber reinforced epoxy resin (EP/CF) composites with good balance on flame retardancy and mechanical properties remains a critical challenge. Inspired by the rod@sheets hierarchical structure of corncobs, herein a novel CF/PO 4 3− intercalated NiFe-LDH hybrid (CF@NiFe-LDH-P) was successfully fabricated via in-situ growth of NiFe-LDH nanosheets on CF surfaces, followed by PO 4 3− intercalation via an ion-exchange process. Subsequently, the as-synthesized CF@NiFe-LDH-P was incorporated with EP matrix. The resultant EP/CF@NiFe-LDH-P composites exhibited remarkable improvements in flame retardancy, including the limiting oxygen index (LOI) value of 36.8 %, UL-94 V0 rating, and a 66.8 % reduction in the peak of heat release rate (PHRR). According to the structure/composition analysis of residual char, the flame-retardant mechanism was mainly ascribed to the synergistic effect between NiFe-LDH and PO 4 3− , where NiFe-LDH catalyzed the carbonization of EP fragments into graphitized carbon, while PO 4 3− enhanced the cross-linking of char network through phosphate ester bonds. Meanwhile, the flame retarded EP/CF@NiFe-LDH-P composites displayed superior mechanical performances. Compared to the pristine EP/CF, EP/CF@NiFe-LDH-P displayed outstanding mechanical properties in Young's modulus (+26.9 %), tensile strength (+26.2 %) and impact strength (+39.4 %). These enhancements were attributed to the corncob-like structure of CF@NiFe-LDH-P, which established strong interfacial adhesion with EP via hydrogen bonding. This work presents an innovative bio-inspired strategy to achieve synergistic optimization of flame retardancy and mechanical performances in EP/CF composites, paving the way for their expanded applications in high-performance engineering and advanced technological fields.
研究领域:
材料科学
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聚合物复合材料
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阻燃技术
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纳米材料
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Yuanliang Huang,lili Liu,Chengyao Hu,Yang Li,Hongping He,Ziyan Chen,Yawen Huang
The pollutants in the excessive discharge of industrial and daily wastewater, which contain multiple metal ions and anions, will cause irreversible damage to the environment and human body. However, current adsorbents only possess adsorption ability toward single type of ion, thus greatly limiting the adsorption efficiency. In this work, we prepared thiol functionalized poly(di(4-vinylpyridine)-zinc chloride-co-divinylbenzene) (Poly(ZnVP2-co-DVB)-SH) with a semicoordinated structure, coordinated/covalent hybridized skeletons, and thiol functional groups via a coordination-polymerization method. On the basis of the radical polymerization, we developed an in situ and facile method to graft Poly(ZnVP2-co-DVB)-SH on polyurethane foam (PU). Due to the semicoordinated structure and thiol groups, the composited foam demonstrated the adsorption capacity toward different ions (Pb2+, Cu2+, and PO43–). The saturated adsorption capacity of the composited foam toward Pb2+, Cu2+, and PO43– can reach to at 228.4, 91.3, and 160.1 mg·g–1, respectively. The adsorption capacity of PO43– is appreciably higher than that of the phosphate adsorbents except the biochars. Adsorption mechanism investigation reveals that the adsorption ability toward multiple ions is arising from multiple interaction, including the coordination centers exchange, thiol-lead reaction, anion exchange, and direct reaction between pyridine-phosphate. The foam can be recycled at least three times. Besides, it shows removal percentages for Pb2+, Cu2+, and PO43– in real urban wastewater. Overall, the modified foam demonstrates a high and multifunctional performance, which is potentially used for water treatment.
研究领域:
环境科学
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材料科学
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化学工程
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Peng Wang,Chen Zhu,Yingji Gao,Zhonghua Cai,Ye ye,Yi Tao
Nitrate-driven sulfide oxidation has been proven to be a cost-effective approach for controlling sediment odor. However, injecting liquid nitrate (LN) directly into sediment carries ecological risks of nitrate escape and release of pollutants into overlying water. In this study, slow-release nitrate granules (GN) were prepared and applied in a continuous flow reactor to assess the differences between GN and LN in sediment remediation and control of this ecological risk. The results showed that the GN slowly released calcium nitrate, resulting in a decrease in acid volatile sulfide (AVS) from an initial 1328 ± 42.7 mg/kg to 490 ± 341 and 212 ± 32.8 mg/kg in the upper (U) and deeper (D) layers of the sediment, respectively. No significant decrease in AVS concentrations was observed in the LN treatments. Compared with LN-D and -U, the NH 4 + -N production and PO 4 3- -P release doses were reduced by 29.5% and 52.0% for GN-D and 41.2% and 37.8% for GN-U, respectively. Taxonomic analysis showed that sulfide-driven denitrifiers such as Thiobacillus , Rhodanobacter , Sulfurimonas , and Pseudomonas became dominant in the GN treatments, which were 2.8–6.7, 27.0–201.8, 1.5–3.0, and 3.0–496 times that of the LN treatments, respectively. The abundance of sulfur oxidation genes (e.g., sat and aprB ) and denitrifying genes (e.g., nirS and nosZ ) were also upregulated to higher levels by GN. Moreover, the genes (e.g., nrfA ) responsible for the isomerization of nitrate into ammonium were down-regulated by GN. The results showed that the slow-released calcium nitrate should be a promising way for in-situ remediation of sulfide-rich sediment.
研究领域:
环境科学
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微生物学
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沉积物修复
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水处理
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Bioengineering and Biotechnology
·
2024
·
IF 4.3
Qin Qi,Yuan Wenhong,Zhang Jiarui,Gao Yang,Yu Yanling
During invisalign treatment, as salivary proteins or glycoproteins fill the space between the teeth and the aligners, they can easily adhere to the teeth, forming an acquired cellular film on which bacteria are highly susceptible to colonizing, which in turn leads to the development of enamel white staining lesions (WSLs), one of the major complications of orthodontic treatment. Inhibiting the activity of cariogenic bacteria while promoting the remineralization of demineralized enamel is the key to preventing and treating WSLs. Currently, the drug commonly used in clinical practice for the treatment of WSLs is silver diamine fluoride, which, although it has both antimicrobial and remineralizing effects, suffers from problems such as pulpal irritation and tooth discoloration. In this study, based on the principle of coordination chemistry, copper ions and plant polyphenol tannins were assembled on invisible orthodontic aligners to form a metal–phenol network coating (TA-Cu MPNs), and zwitterionic sulfonamethyldopamine was introduced for bionic mineralization to obtain the multifunctional coating TA-Cu MPNs@ZDS@CaP (TZC). The coating exhibits acid-responsive release of Ca2+ and PO43−, and the decomposed CaP layer can be regenerated by a simple dipping method. The TZC coating strongly inhibits common cariogenic bacteria and their biofilms. In addition, the results of the in vitro mineralization experiment show that TZC-coated invisible orthodontic aligner treatment of demineralized enamel has significant remineralization effects. It is worth mentioning that the constructed coating has a durable antibacterial effect and can meet the service cycle of invisible orthodontic aligners. This study provides theoretical and experimental bases for the prevention or treatment of WSLs in invisible orthodontic treatment.
研究领域:
牙科材料
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正畸学
·
生物材料
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牙科研究
·
材料科学
✓ 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）