JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2022
·
IF 3.119
Ziyu Zhuang,Dongdong Li,Jinshun Lei,Dandan Gao,Dewen Zeng
Highly concentrated boron is widespread in salt lake brine and nuclear wastewater. Treatment of these aqueous solutions involves the solubility of extensive boron-containing minerals. Recently, we concentrated on the temperature-dependent solubility of the H3BO3 + salt + water system. Here, we systematically determined the ternary solubility isotherms in the H3BO3 + RbCl + H2O and H3BO3 + NH4Cl + H2O systems at T = (273.15, 298.15, 323.15, 348.15 and 363.15) K, using an isothermal equilibrium method. The results showed that both ternary systems belonged to a simple eutectic case. The solubility isotherms consisted of the solubility branches of H3BO3(cr) and RbCl(cr) or NH4Cl(cr). Using a revised Pitzer–Simonson–Clegg (rPSC) model implemented in the ISLEC software, these ternary solubility data were represented by fitting the interaction parameters between H3BO3 and RbCl and H3BO3 and NH4Cl. With the help of these models, polythermal phase diagrams of the two ternary systems are predicted.
研究领域:
化学
·
环境科学
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ChemistrySelect
·
2024
·Vol. 9
·期 20
·e202401258
·
IF 1.9
Conglin Zhang,Haichao Li,Bingxuan Du
Graphical In this paper, the activated carbon material AC600 is prepared from lignin as raw material and RbCl as activator at 600 °C, and a series of characterization analysis and thermodynamic experiments are carried out. This study proves that RbCl can be used as an activator for the activation of lignin. In order to prepare carbon adsorbent materials, lignin was used as raw material and rubidium chloride as activator, activated carbon materials were prepared by chemical activation method, and its structure was characterized and its adsorption performance on methylene blue solution was investigated; the adsorption of crystalline violet dye was carried out at different temperatures, and the adsorption thermodynamics was studied. The results showed that: the specific surface area of the activated carbon was 433.32 m 2 /g, the pore volume was 0.2191 cm 3 /g, and the average pore size was 2.0222 nm; the adsorption value of methylene blue could reach 172.0 mg/g, and it could quickly and efficiently adsorb methylene blue solution; the adsorption effect on crystal violet solution was good, and the saturated adsorption amount at 40 °C was up to 279 mg/g, and the removal rate reached 93 %, belonging to the spontaneous adsorption thermodynamic reaction. The experiment proved that rubidium chloride can be used as an activator to activate lignin raw materials to prepare activated carbon samples, and can effectively adsorb dyes.
研究领域:
材料科学
·
环境科学
·
化学工程
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2024
·
IF 2
Yueheng Wang,Ziyu Zhuang,Yanfei Fan,Dandan Gao,Dongdong Li
Ammonium ion is of the same charge as alkali ions and with similar ionic radius as potassium, rubidium, and cesium ions. Solid solutions are very common between ammonium and alkali salts, which is of great interest for understanding the geology, soil, and environment fate of these elements. In this study, the solid–aqueous equilibrium in the NH4Cl + RbCl + H2O and NH4Cl + CsCl + H2O systems was determined at 298.15 K. For each system, two incontinuous solid solutions, i.e. (NH4,Rb)Cl(α) and (Rb,NH4)Cl(β), or (Cs,NH4)Cl(α) and (NH4,Cs)Cl(β), presented, and their composition and structure were studied using Schreinemakers’ wet residues analysis, XRD, and Raman characterization. The equilibrium between these solid solutions and aqueous solutions were well modeled using an integrated solution equilibrium calculator program, in which a Pitzer-Simonson-Clegg model and a subregular model were implemented for describing the nonideality of aqueous phase and solid solution. According to the experimental and thermodynamic modeling results, NH4Cl can dissolve RbCl and CsCl in the solid state (NH4,Rb)Cl(α) or (NH4,Cs)Cl(β) with limited solid solubilities of 0.18 or 0.051 in mole fraction, respectively. RbCl or CsCl can also dissolve NH4Cl in the solid state (Rb,NH4)Cl(β) or (Cs,NH4)Cl(α) with limited solid solubilities of 0.37 and 0.095 in mole fraction, respectively.
研究领域:
化学
·
环境科学
·
地质学
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JOURNAL OF SOLUTION CHEMISTRY
·
2017
·Vol. 46
·期 9
·1871-1902
·
IF 1.342
Li Dongdong,Gao Dandan,Zeng Dewen,Li Wu
The solid solution–aqueous solution (SSAS) equilibria in the KCl + RbCl + H 2 O system were redetermined at 298.15 K. The experimental data for (K,Rb)Cl were consistent with the formation of a continuous solid solution without miscibility gaps. The Schreinemakers’ wet residues method and an XRD quantitative analysis technique based on the Vegard approach were applied to determine the chemical composition of the solid solution phase of (K,Rb)Cl. The compositions of (K,Rb)Cl derived from the Vegard approach are in accordance with those from the wet residues method. The thermodynamic properties of mixing of the (K,Rb)Cl solid solution were theoretically predicted using atomistic simulations. From these simulations, a regular solution behavior is recognized that is consistent with the knowledge of the thermodynamic properties of mixing of (K,Rb)Cl obtained from SSAS equilibrium studies, but the predicted regular solution model parameter A
0 is significantly larger than that regressed from the SSAS equilibrium data. Finally, a thermodynamic model was developed for representing the SSAS equilibria and element partitioning in the KCl + RbCl + H 2 O system as a function of temperature that can be used for predicting the SSAS equilibria in the studied system over the temperature range 273.15–373.15 K.
研究领域:
化学
·
材料科学
·
物理化学
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jia Sun,Yinsheng Gu,Yingwei Lu,Juntao Hu,Tao Chen,Changfei Zhu,Paifeng Luo
Nowadays, the MA-FA mixed-cation perovskite solar cells (PSCs), demonstrating much higher stability than that of single-cation MAPbI 3 or FAPbI 3 , are still encountering a low-efficiency issue. The main reason is that there existing a lot of defects in SnO 2 electron transport layers (ETLs) and perovskite absorbers. Herein, we develop a synergistic strategy of Rubidium Chloride (RbCl) doping and 4- tert -butylbenzylammonium iodide (tBBAI) passivation to fabricate high-performance MA x FA 1-x PbI 3 mixed-cation PSCs. The alkali halide RbCl is first selected as a novel doping additive to regulate the film properties of SnO 2 and perovskites. Research shows that the negative Cl - ions can combine with uncoordinated Sn 4+ ions due to their strong bonding ability, which can passivate the oxygen-vacancy-related defects and enhance the charge transport of SnO 2 ETLs. Meanwhile, the doped Rb + and Cl - ions may diffuse into perovskite lattices to promote grain growth and reduce the defects of perovskites. Besides, we employ an organic halide salt tBBAI to passivate perovskites and suppress surface defects. Results of deep level transient spectroscopy (DLTS) indicate that SnO 2 and SnO 2 -RbCl based devices have deeper hole traps and large trap densities (Δ E = 0.92 eV, N T = 1.10 × 10 16 cm −3 ; ΔE = 0.93 eV, N T = 2.16 × 10 15 cm −3 ); while tBBAI-treated SnO 2 -RbCl-based devices own a shallower hole trap and a smaller trap density ( ΔE = 0.72 eV, N T = 2.44 × 10 13 cm −3 ); and the corresponding I Pb and I (MA/FA) antisite defeats are also identified. Therefore, our synergistic strategy is effectively able to reduce the defect density and suppress the non-radiative recombination. Consequently, the best-performance MA 0.85 FA 0.15 PbI 3 PSCs achieve an impressive power conversion efficiency (PCE) of 22.54% with a large open circuit voltage ( V oc ) of 1.16 V, which are by far the highest values of MA 0.85 FA 0.15 PbI 3 mixed-cation PSCs.
研究领域:
材料科学
·
光伏技术
·
半导体物理
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DESALINATION
·
2025
·
IF 9.8
Jiangjiang Lv,Zhongwei Zhao,Xuheng Liu,Xingyu Chen,Jiangtao Li,Fenglong Sun
With the surging demand for rubidium and cesium, rubidium and cesium extraction resources have gradually expanded from ores to brines to ensure the security of supply of key metals. However, traditional adsorbents of heteropoly salts inevitably suffer from environmental pollution risks, unsustainability, and cumbersome process flows. In this study, potassium phosphotungstate is employed as an ammonium-free adsorbent for sustainably extracting Rb and Cs from salt lake brine. K 3 PW 12 O 40 shows high adsorption capacity (37.71 mg/g for Rb and 60.42 mg/g for Cs) and fast adsorption kinetics (adsorption equilibrium within only 2 min). The adsorbent also exhibits excellent selectivity, with the separation coefficients of Rb/K up to 167.95 and those of Cs/K up to 759.07. It also maintains chemical stability within a broad pH range of 2–10. The desorption efficiency of rubidium and cesium is up to 99.8 % and 85.6 % respectively. After five desorption-adsorption cycles, the adsorption capacity of Rb and Cs remains at 99.8 % and 86.7 % of the initial adsorption capacity. The adsorbent selectively adsorbs Rb + and Cs + from the practical brine even in the presence of a large number of co-existing ions. The Rb and Cs adsorption mechanism for K 3 PW 12 O 40 was primarily ionic exchange with K. The adsorption process provides excellent performance and environmental advantages based on the salt lake industrial cluster. Efficient adsorption performance of Rb and Cs was achieved without the emission of ammonia nitrogen pollutants and the use of ammonium salt chemicals. This study offers a sustainable alternative for extracting Rb and Cs from salt lake brine.
研究领域:
湿法冶金
·
资源可持续回收
·
无机化学
·
环境工程
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
Wang Guancheng,Wei Xiaoli,Feng Kaizheng,Wu Yunfei,Dong Haijiao,Lu Mingze,Du Wei,Fang Qianglong,Ju Ming-Gang,Ma Jing-Yuan,Jiang Yali,Wu Haoan,Ma Ming,Zhang Yu
Prussian blue nanoparticles (PBNPs) have emerged as versatile nanozymes with reactive oxygen species (ROS)-scavenging capabilities, predominantly applied in antioxidant therapies. In this work, we present a combined theoretical and experimental study demonstrating that modulating Fe coordination environments can fundamentally reconfigure PBNPs’ catalytic properties, enabling ROS generation and pro-oxidative functionality. Ab initio molecular dynamics revealed different H 2 O 2 lysis mechanisms at Fe sites with varying coordination numbers: Low-coordinated center (FeN 4 ) induced hydrogen atom transfer to form Fe=O species, while high-coordinated FeN 5 generated ·OH radicals via H + -assisted homolysis under acidic conditions. Guided by calculations, Cs-doped PBNPs (Cs-PBs) with elevated coordination numbers were synthesized via alkali cation stoichiometric control, leveraging high distribution coefficient and low hydration energy of Cs + . Experimental results confirmed radical generation in Cs-PBs aligned with theoretical predictions. The size-optimized Cs-PBs demonstrated ultrahigh peroxidase-like activity (1182.26 U·mg -1 ) and outperformed ROS generating properties in both pollutant degradation and chemodynamic therapy. This work redefines PBNPs’ catalytic potential beyond conventional antioxidant roles, and lays the foundation for innovative environmental and therapeutic solutions.
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高影响因子
MARINE ENVIRONMENTAL RESEARCH
·
2025
·
IF 3.2
Baishun Liang,Zhen Zhong,Lilan Zhang,Dong Sun
With the growing interest in deep-sea mining from industry, environmental risk assessments of deep-sea mining activities urgently require refinement. This study focuses on the biotoxicity effects of heavy metals released from disturbed surface sediments in the Clarion-Clipperton Fracture Zone (CCZ) of the eastern Pacific Ocean, using Vibrio fischeri as a model organism to simulate deep-sea mining tailings discharge conditions. Through leaching experiments, we identified heavy metals with higher release concentrations (Rb, Li, Mn, Mo, V, Cs) and those with higher toxicity (Cu, Cd, Cr), and investigated their individual and binary combined toxicities under simulated deep-sea low-temperature (4 °C) and surface ambient-temperature (20 °C) conditions. Results showed that the concentrations of Cd, Cu, and Cr released from disturbed sediments (0.035, 1.75, 1.06 μg/L) were significantly lower than their EC 50 (36.95, 1.72, 14.43 mg/L). However, low-toxicity heavy metals such as Mn markedly enhanced the toxicity of Cd, Cu and Cr (up to 230 %), while Rb and Mo exhibited inhibitory effects. Low temperature (4 °C) significantly reduced the toxicity of Cd (reductions of 32 %–85 %) but enhanced Cu and Cr toxicity by 31 %–170 %. This study reveals the complex interactive effects of heavy metal combined toxicity in deep-sea low-temperature environments and provides critical data for defining toxicity thresholds and ecological risk assessments of heavy metals in deep-sea mining tailings discharges.
研究领域:
海洋毒理学
·
环境风险评估
·
深海生态学
·
生物地球化学
·
环境污染
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Small
·
2025
·Vol. 21
·期 21
·2502827
·
IF 12.1
Pei Cai,Xiaotong Yu,Zhijun Wang,Meng Cao,Xinxin Yang,Yusong Du,Jing-Tai Zhao,Juanjuan Xing,Jiye Zhang,Kai Guo
The IV-VI compound SnSe is an environmentally friendly and high-performance thermoelectric material with intrinsically low lattice thermal conductivity. Recent research efforts have focused on enhancing carrier concentration and effective mass to improve power factors, thereby achieving superior thermoelectric performance as reflected in the figure of merit ZT . In context of the anisotropic crystal structure of SnSe, this study utilized a hydrothermal method to synthesize Rb-doped SnSe nanosheets. Rb acts as an acceptor dopant, increasing the hole concentration to 2.0 × 10 19 cm −3 and promoting second valence band participation in transport at room temperature, significantly elevating the ZT value of polycrystalline SnSe to 1.41 at 773 K. Furthermore, texture engineering was implemented through a secondary sintering process. This approach facilitates the organized stacking of grains with highly preferred orientations, resulting in a notable improvement of hole mobility perpendicular to the pressure direction to further increase the power factor. By synergistically combining carrier concentration optimization with texture engineering strategies, an exceptional ZT value of 1.74 at 773 K was achieved in polycrystalline SnSe. This work presents a cost-effective, straightforward, and low-temperature synthesis route for the large-scale production of high-performance SnSe thermoelectric materials, offering significant potential for practical applications in energy harvesting and conversion.
研究领域:
材料科学
·
热电学
·
纳米材料
·
能量转换
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高影响因子
CHEMISTRY OF MATERIALS
·
2025
·
IF 7
Luyong Zhang,Zhencheng Wu,Jingdong Yan,Shibin Wang,Zilong Chen,Zhihua Yang,Fangfang Zhang,Shilie Pan
Sulfates have remained promising candidates for deep-ultraviolet (DUV) optical crystals owing to the inherently wide bandgaps induced by the [SO4] tetrahedral groups. However, the structural rigidity of [SO4] tetrahedra imposes severe restrictions on the polarization anisotropy, fundamentally preventing sulfates from achieving sufficient birefringence required for regulating light polarization. Herein, by incorporating f0 rare earth metal cation Y3+ into alkali metal sulfates, we synthesized six compounds, AY(SO4)2 and A3Y(SO4)3 (A = K, Rb, Cs). They exhibit dramatically enhanced birefringence between 0.013–0.056 at 546 nm, with up to 25 times that of their parent alkali metal sulfates, which originate from the highly aberrant Y–O polyhedra and the dimensionality reduction of the Y–O–S network regulated by A-site cations. This study provides valuable insights into the further exploration of sulfate-based optical materials.
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INORGANIC CHEMISTRY
·
2026
·Vol. 65
·期 29
·17206-17214
·
IF 4.6
Zhang Yanjiao,Gong Pifu,Chen Mingxing,Wang Zhigang,Wang Xinfang,Qi Man,Han Yunhua,Jia Zhen,Xia Mingjun
Tunable fluorescence emission endows luminescent materials
with
immense applications in optoelectronic devices and information security.
Herein, broad-wavelength photoluminescence (PL) tuning from yellow
to white to blue is realized in a zero-dimensional (0D) K 4 CdCl 6 halide via a facile Rb/Sn codoping strategy. Interestingly,
K 4 CdCl 6 and isostructural Rb 4 CdCl 6 halides exhibit yellow and blue PL emissions via the homovalent
doping of Sn 2+ , respectively. The relative intensity ratio
of yellow and blue emission bands can be effectively regulated in
K 4 CdCl 6 :Sn 2+ halides by Rb + alloying; accordingly, the continuous luminescence color tuning
covering yellow, white, and blue spectral regions was successfully
achieved. Density functional theory calculations further verify that
the doping of Sn 2+ leads to the appearance of an impurity
energy level within the band gap, accelerates electronic transitions,
and ultimately enhances PL emission efficiency. On the basis of this
rationally designed tunable luminescent system, the three-level color-coded
intelligent password devices, combining multimode optical anticounterfeiting
and digital information encryption, were developed. This work not
only develops a reliable ion doping strategy for luminescence modulation
in the metal halides but also expands their diversified application
prospects in advanced optoelectronic fields.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2026
·Vol. 71
·期 9
·3749-3760
·
IF 2.4
Zhuang Ziyu,Zhang Manman,Li Dongdong,Gao Dandan,Feng Haitao
The phase equilibria of ternary systems
phenylboronic
acid (C 6 H 5 B(OH) 2 ) + KCl/RbCl/CsCl
+ H 2 O were investigated at 298.15 and 348.15 K using
a direct
isothermal dissolution equilibrium method with mannitol-NaOH titration.
Solid phases were characterized by Schreinemakers’ wet method,
XRD, Raman, IR, and TG-DSC. No new adducts were detected, in contrast
to the stable adduct 2H 3 BO 3 ·3CsCl formed
in the H 3 BO 3 + CsCl + H 2 O system.
All three systems are of the simple eutectic type, with two solubility
branches and one invariant point. C 6 H 5 B(OH) 2 exerts a weak salting-in effect on the chlorides, independent
of temperature. Conversely, the chlorides salt out C 6 H 5 B(OH) 2 following the order CsCl < RbCl < KCl,
an effect that increases with temperature. This pattern differs from
H 3 BO 3 -alkali chloride systems (salting-in) but
resembles H 3 BO 3 -alkaline earth chloride systems
(salting-out). The salting-out is attributed to salt-induced reduction
of water activity, which disrupts the hydration layer of the solute
and promotes its dehydration condensation to triphenyl boroxine. From
a crystallographic viewpoint, the layered structure of H 3 BO 3 provides suitable sites for Cs + , whereas
the three-dimensional network of C 6 H 5 B(OH) 2 does not. This structural insight suggests that the layered
1,4- and 1,3-benzenediboronic acids may form similar adducts with
Cs + , warranting further investigation.
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