JOURNAL OF CHEMICAL THERMODYNAMICS
·
2014
·
IF 2.423
Pan Liang,Qiu-Yue Kang,Lu Du,Zhi-Hong Liu
Two pure microporous materials, Rb[ZnBP 2 O 8 ] and Cs[ZnBP 2 O 8 ], have been synthesized and characterized by XRD, FT-IR, DTA-TG techniques and chemical analysis. The molar enthalpies of solution of Rb[ZnBP 2 O 8 ] and Cs[ZnBP 2 O 8 ] (s) in 3 mol · dm −3 HCl (aq), of Zn(PO 3 ) 2 (s) in (HCl + H 3 BO 3 ) (aq), and of RbCl (s)/CsCl (s) in [Zn(PO 3 ) 2 + HCl + H 3 BO 3 ] (aq) were measured by microcalorimeter at T = 298.15 K, respectively. With the incorporation of the previously determined enthalpy of solution of H 3 BO 3 (s) in 3 mol · dm −3 HCl (aq), together with the use of the standard molar enthalpies of formation for Zn(PO 3 ) 2 (s), RbCl (s)/CsCl (s), H 3 BO 3 (s), HCl (aq) and H 2 O (l), the standard molar enthalpies of formation of −(3198.5 ± 1.2) kJ · mol −1 for Rb[ZnBP 2 O 8 ] and −(3212.7 ± 1.2) kJ · mol −1 for Cs[ZnBP 2 O 8 ] at T = 298.15 K were obtained on the basis of the appropriate thermochemical cycle. In addition, the molar enthalpy of formation of −(2944.4 ± 1.2) kJ · mol −1 for [ZnBP 2 O 8 ] − has also been estimated by a group contribution method, which can be used to predict the Δ f H m θ of the other similar borophosphates. Moreover, these data have been further used to compare the thermodynamic stability of this series of borophosphates.
研究领域:
材料科学
·
物理化学
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产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 94
·52402-52409
·
IF 3.708
Yong Liu,Lungang Chen,Tiejun Wang,Ying Xu,Qi Zhang,Longlong Ma,Yuhe Liao,Ning Shi
Non-edible cellulose has attracted considerable attention to be converted into valuable platform chemicals. Direct transformation of cellulose to C6 alditols (mannitol and sorbitol) provides a sustainable route. A productive approach is presented in this work using a Ru/C catalyst combined with H+-released boron phosphate in an aqueous phase. A yield of C6 alditols as high as 74.9% with a 91% conversion of cellulose is achieved. By adding silica–alumina materials, the yield of C6 alditols can be improved to 93.5% with complete conversion. The acid sites gradually released from boron phosphate under hydrothermal conditions could promote the hydrolysis of cellulose without significant degradation of glucose. Furthermore, the interaction of boric acid with C6 alditols may form borate–polyol complexes, which can enhance the stability of the C6 alditols to avoid further hydrogenolysis and dehydration of the C6 alditols formed. Due to the adsorption ability of the substrate, the addition of silica–alumina materials with a high content of silica leads to improved performance.
研究领域:
化学工程
·
可再生资源利用
✓ 已验证
产品关联
DOI
高影响因子
Science China-Chemistry
·
2021
·Vol. 64
·期 9
·1498-1503
·
IF 9.445
Zhang Wenyao,Zhang Zhizhong,Jin Wenqi,Zhang Ruonan,Cheng Meng,Yang Zhihua,Pan Shilie
The introduction of oxofluoride anion into anionic group assists to tune optical properties owing to the change of coordination, electronegativity, and according anionic framework. Here, we proposed a rational design of new compounds by fluorine-driven structure and optical property evolution. A new borophosphate Ba 2 BP 3 O 11 with the monoclinic space group P 2 1 / c has been synthesized in the sealed system. Ba 2 BP 3 O 11 exhibits a rare P–O–P bridge formation, which is the first example in alkaline-earth metal borophosphates. By further substituting [BO 4 ] 3− with [BO 3 F] 4− , the first alkaline-earth metal/lead fluoroborophosphates M 2 BP 2 O 8 F (M = Ba and Pb) with the same space group were designed. Since the scissors effect of fluorine, in M 2 BP 2 O 8 F (M = Ba and Pb), a BO 3 F tetrahedron corner-sharing with three PO 4 tetrahedra forms 1D chains along the b -axial direction, which are filled by MO n (M = Ba/Pb, n = 5, 6, 8) distorted polyhedra. The first principles calculation shows that the borophosphate Ba 2 BP 3 O 11 has a birefringence about 0.013 @1,064 nm, while the fluoroborophosphates M 2 BP 2 O 8 F (M = Ba and Pb) have the values of 0.035 and 0.043 @1,064 nm, respectively. Such an apparent enhancement in birefringence is derived from synergies of the oxyfluoride and cation. The introduction of fluorine-containing heteroanionic groups provides a feasible strategy to design novel promising optical materials.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
L. Yue,X.Z. Zheng,P.J. Xia,C. Wang,Y.F. Lei,M. Xu,W.B. Dai
Rare-earth (RE) and/or transition metal (TM) ions (co)doped phosphors have garnered much attention for promoting development in the fields of solid state lighting (SSL) and displays. It is a meaningful work to design high-quality phosphor via intelligent assembling from wide variety of compounds with RE/TM ions. Herein, the lanthanum borophosphate La 7 O 6 (BO 3 )(PO 4 ) 2 (LOBP) and Bi/Eu were selected as host and dopants for constructing the phosphor LOBP: Bi/Eu via solid phase synthetic method due to simple synthesis, chemical/thermal stability, rich cationic sites, appropriate bandgap, and controllable optical tuning from synergistic effect of cyan (Bi) and red (Eu) emissions, respectively. The structure and site occupations were analysed via XRD and Rietveld refinements , showing Bi 3+ ions were only resided in La 3+ sites within the monoclinic matrix (P2 1 /n) and appeared greater inclination towards the La sites with coordinate number ( CN ) = 8 as compared with CN = 7 due to the closer ion radius ratio. While Eu 3+ ions entered into the two distinct La sites with almost the same probability. The morphology and elemental mapping were obtained via SEM/EDS, exhibiting irregular particle shape with micron-level size, and the chemical composition met expectation. Through energy transfer (ET) from Bi to Eu under n -UV excitation, the adjustable photoluminescence (PL) from cyan traversing white and finally to red could be achieved. The concentration quenching for both singly- (Bi) and co-doped (Bi/Eu) phosphors were charged by the d-d interactions. Finally, the stable as-fabricated n -UV pumped w LED via coupling the composition-optimized white-emitting LOBP: 2%Bi, 7%Eu to a commercial 305 nm n -UV LED chip shows splendid performances.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2022
·
IF 6.137
Jie Wang,Ting Qu,Jing Ni,Fan Cheng,Fuqiang Hu,Ying Ou,Chunli Gong,Sheng Wen,Xiaobo Chen,Hai Liu
Super inorganic proton conductor boron phosphate (BPO 4 ) was utilized to functionalize the multi-walled carbon nanotubes (MWNTs) through a convenient sol-gel method with the assist of polydopamine (PDA) to yield BPO 4 coated MWNTs (BPO 4 @MWNTs). Then the BPO 4 @MWNTs was dispersed in dilute chitosan (CTS) solution to fabricate CTS/BPO 4 @MWNTs composite membrane . The CTS/BPO 4 @MWNTs composite membranes showed superior performances in thermal stability, mechanical property and oxidation stability due to the well-dispersed BPO 4 @MWNTs in CTS matrix and the optimized interface compatibility between the BPO 4 @MWNTs and the CTS matrix. Moreover, BPO 4 coated on the surface of MWNTs can provide an extra proton conducting pathway render the CTS/BPO 4 @MWNTs-2 composite membrane showed the proton conductivity of 0.040 S cm −1 at 80 °C and the maximum power density of 49.0 mW cm −2 at 70 °C and 2 M methanol concentration much higher than that for original CTS membranes.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANICA CHIMICA ACTA
·
2017
·
IF 2.002
Muhammad Ali Khan,Yan-Yan Li,Shang-Xiong Huang-Fu,Hong Chen,Li-Jun Zhang,Peng-Fei Liu,Ju-Song Yu,Rui-Huan Duan,Ling Chen
A new anhydrous mixed alkali metals borophosphate, Li 3 Cs 2 BP 4 O 14 , has been synthesized by the solid-state reaction. Single crystal X-ray diffraction analysis reveals that the title compound crystallized in a tetragonal geometry with space group of P 4 2 / mbc (No. 135) and cell parameters of a = 10.3413(5) Å, b = 10.3413(5) Å, c = 12.042(2) Å. Its one-dimensional (1D) chain structure is constructed by fundamental building unit (FBU) of [B(P 2 O 7 ) 2 ] 5− which contains P–O–P connections with B:P = 1:4. Thermal analysis, UV–Vis-near-IR diffuse reflectance spectroscopy, IR spectroscopy and theoretical calculations have been well performed on this new borophosphate compound.
研究领域:
材料科学
·
晶体学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Yuanfang Ai,Weixi Chen,Xi Wu,Na Zheng,Longcheng Tang,Dongqi Wang,Huang Tang,Kun Cao
Intumescent flame-retardant coatings offer excellent passive fire protection for flammable materials and steel. However, a key challenge is the conflict between increased melt viscosity from additive catalyst and chemical foaming behavior. Herein, “interfacial autocatalytic” strategy-guided design of a double dopant-free epoxy coating is reported with a 100 µm boron-rich upper layer and a 300 µm phosphorus-rich bottom layer. This coating generates BPO 4 catalyst in situ at the interface during combustion, synergistically catalyzing charcoal formation with the expansion process. BPO 4 , with its better lattice arrangement, is able to form a dense ceramic layer of 5.5 µm ceramic layer from a stack of 10–40 nm nanoparticles, encapsulating an underlying 1.8 cm intumescent char layer. The coating demonstrates the superior thermal insulation with the heat-resistant time for up to 50 min, a 271% delay in ignition time, an ultra-low fire growth rate with 58% reduction, and a 33% reduction in total heat release. In addition to high transparency, this coating presents easy self-healing, good mechanical properties, and water resistance. This autocatalytic strategy in a confined space-time introduces a new method for enhancing catalytic charring flame retardancy.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 29
·12331-12337
·
IF 3.5
Sujuan Yu,Jiangtao Fan,Zhanggui Hu,Yicheng Wu
The exploration of nonlinear optical crystals with ultraviolet (UV) transparent ranges and easy-to-grow large-size crystals is one of the current research interests. Herein, by combining borate and phosphate groups, a novel congruently melting alkali-mixed metal borophosphate, Li3Na7B4P6O26 (LNBPO) with UV transparency was successfully designed and synthesized using a high-temperature flux method. LNBPO crystallizes in the non-centrosymmetric (NCS) and polar orthorhombic space group Pca21 (no. 29), showcasing interesting (B2P3O13)∞ chains along the c axis. Notably, LNBPO has a moderate second harmonic generation (SHG) response (∼0.38 × KDP) and displays a wide transmission ranging from 0.22 to 3.68 μm, as measured by a [001]-oriented crystal wafer. Furthermore, a high-quality single crystal of LNBPO with sizes up to 14 × 14 × 12 mm3 was grown using the top-seeded solution growth method. The refractive indices of LNBPO were determined by applying the minimum deviation angle method. These results show that LNBPO possesses a phase-matching wavelength as short as 483 nm, indicating its potential as a new UV NLO crystal.
研究领域:
材料科学
·
晶体学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2016
·Vol. 32
·期 1
·127-133
·
IF 1.086
Li Xiaoshuang,Liu Yuan,Guo Chaofeng,Liu Haiyang,Wang Gang,Cai Qiang,Yao Youwei
A layered aluminoborophosphate(LABP-DDA) was hydrothermally synthesized using dodecylamine as a structure-directing agent, and was added into polyamide 66(PA66) to obtain nanocomposites, PA66/LABP-DDA, via melt intercalation method. The characterization results of transmission electron microscopy(TEM) and small angle X-ray scattering (SAXS) indicate that LABP-DDA has been successfully exfoliated into nano-layers of PA66 matrix. The unstable γ phase of PA66 was found in the composites with the help of X-ray diffraction(XRD) and differential scanning calorimetry(DSC). The heterogeneous nucleation effect of LABP-DDA resulted in an increasement of about 10 °C in melting temperature and an increasement of about 7% in crystallinity when compared with those of neat PA66. The introduction of LABP-DDA did not significantly affect the toughness and strength of PA66. The results of flammability test indicate that LABP-DDA possesses positive synergistic flame retarding effect in the presence of melamine polyphosphate(MPP) and the 77%PA66/(23– x )%MPP/x%LABP-DDA( x =1, 2) samples in thickness of 1.6 mm reached from Fail to V-1 rating based on UL94, compared with 77%PA66/23%MPP.
研究领域:
材料科学
·
高分子化学
·
纳米复合材料
·
阻燃技术
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2016
·Vol. 45
·期 16
·7124-7130
·
IF 4.177
Li-Jun Zhang,Yan-Yan Li,Peng-Fei Liu,Ling Chen
New borophosphates Li3Cs2M2B3P6O24 (M = Pb, Sr) have been synthesized by high-temperature solid-state reactions. The single-crystal X-ray diffraction data reveal their non-centrosymmetric cubic space group P213 and lattice parameters of a = 12.7246(3) Å and 12.687(2) Å and V = 2060.31(8) Å3 and 2042.3(4) Å3 for Li3Cs2Pb2B3P6O24 and Li3Cs2Sr2B3P6O24, respectively. They are three-dimensional (3D) [BP2O8]3−∞ anionic frameworks formed by a new double six-membered ring building unit consisting of BO4 and PO4 units joined alternately. Interestingly, such a double six-membered ring is regarded as the structural variation of the 12-membered ring in the known KSrBP2O8, fusing at the BO4 tetrahedron induced by the coexistence of the Li+ and Cs+ cations with their large size difference. The title compounds show weak SHG intensity and exhibit photoluminescence emissions at 410 nm for Li3Cs2Pb2B3P6O24 and 440 nm for Li3Cs2Sr2B3P6O24.
研究领域:
材料科学
·
晶体学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 6
·2619-2633
·
IF 4.5
Yang Lei,Liu Duan,Luo Jianhong
The new polypyrrole tin boratophosphate (PTB) material has been synthesized for the first time in this work. A series of characterization analyses of the PTB by FTIR, XRD, TGA, SEM, TEM and EA have proved that PTB is amorphous ion nanocomposites, which shows that the PTB has excellent chemical stability in complex acidic and organic environments and commendable selectivity for Pb 2+ as well. The adsorption mechanism of the PTB adsorption process was studied in detail from the aspects of thermodynamics, kinetic and adsorption isotherm. It is proved that the adsorption kinetic model conforms to the quasi second-order kinetic model, while the adsorption isotherm is consistent with the Langmuir model. It is also proved that the adsorption of Pb 2+ ions by the PTB is spontaneous endothermic process. In conclusion, the PTB cation exchange material synthesized in this paper has a good application prospect in the removal of Pb 2+ from industrial and domestic sewage.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Duan Liu,Xin Wan,Weiqi Li,Mengsen Peng,Jianhong Luo
Organic–inorganic composites have exhibited unexpected new properties and have received attention by many scholars. The research on acrylamide Tin(IV) boratophosphate (ATBP) is introduced in this paper. The influence of reactant concentration, mixing ratio, pH, and other experimental parameters on the properties of the ATBP was elucidated, determining which exhibits the best ion exchange capacity (IEC) of 1.4 mequiv/g, and the physical and chemical properties of the ATBP were characterized by TGA, FTIR, XRD, SEM, and EDS. Furthermore, the elution concentration, elution performance, and thermal stability of ATBP were also studied. It was amazing to find that the distribution coefficient of ATBP was 337 mL g–1 for Fe3+. And the adsorption mechanism of ATBP was also studied from the thermodynamics, kinetics, and adsorption isotherm. The ATBP cation exchanger has a good application prospect in the removal of Fe3+ from acid polluted water.
研究领域:
化学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）