INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2021
·
IF 3.764
Hailin Zhao,Bingjing Tang,Jie Tang,Yafeng Cai,Yao Cui,Hao Liu,Li Wang,Yunsong Wang,Wangcheng Zhan,Yanglong Guo,Yun Guo
Catalytic oxidation is believed to be the most efficient method for indoor formaldehyde purification. Herein, we reported that the Pt/Na-ZSM-5 catalyst with low Pt loading (0.16 wt %) prepared by depositing Pt on Na+ ion-exchanged ZSM-5 could completely oxidize 300 ppm formaldehyde in 2.5 vol % H2O at 32 °C and maintain its activity during the 62 h-long stability test. Multiple characterizations revealed that the presence of Na species significantly enhanced formaldehyde adsorption ability and made Pt species tend to exist in the form of metal Pt through electron transfer from Na to Pt, which promoted the activation of oxygen and opened a new efficient formaldehyde oxidation pathway, namely, direct decomposition of formate. The synergistic effects resulted in the TOF of Pt(0.16)/Na-ZSM-5 being about nine times higher than that of Pt(0.50)/ZSM-5. Our study showed that utilizing an alkali metal to tune the surface acidity/basicity of the support and the state of the supported noble metal was a promising way to improve the intrinsic catalytic performance and reduce noble metal usage.
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ADVANCED MATERIALS
·
2021
·Vol. 33
·期 16
·2100229
·
IF 30.849
Yanxia Wang,Yangyang Lai,Jun Chu,Zichao Yan,Yun-Xiao Wang,Shu-Lei Chou,Hua-Kun Liu,Shi Xue Dou,Xinping Ai,Hanxi Yang,Yuliang Cao
Room-temperature (RT) sodium–sulfur (Na–S) batteries hold great promise for large-scale energy storage due to the advantages of high energy density, low cost, and resource abundance. The research progress on RT Na–S batteries, however, has been greatly hindered by the sluggish kinetics of the sulfur redox reactions. Herein, an elaborate multifunctional architecture, consisting of N-doped carbon skeletons and tunable MoS 2 sulfiphilic sites, is fabricated via a simple one-pot reaction followed by in situ sulfurization. Beyond the physical confinement and chemical binding of polarized N-doped carbonaceous microflowers, the MoS 2 active sites play a key role in catalyzing polysulfide redox reactions, especially the conversion from long-chain Na 2 S n (4 ≤ n ≤ 8) to short-chain Na 2 S 2 and Na 2 S. Significantly, the electrocatalytic activity of MoS 2 can be tunable via adjusting the discharge depth. It is remarkable that the sodiated MoS 2 exhibits much stronger binding energy and electrocatalytic behavior compared to MoS 2 sites, effectively enhancing the formation of the final Na 2 S product. Consequently, the S cathode achieves superior electrochemical performance in RT Na–S batteries, delivering a high capacity of 774.2 mAh g −1 after 800 cycles at 0.2 A g −1 , and an ultrahigh capacity retention with a capacity decay rate of only 0.0055% per cycle over 2800 cycles.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shouji Huang,Liwen Yang,Guobao Xu,Tongye Wei,Jiao Tian,Xiong Liu,Huapeng Li,Ziyuan Xiang,Juexian Cao,Xiaolin Wei
A template-free strategy is developed to construct a composite of hollow Co 3 O 4 nanocrystals with N-doped carbon and carbon nanotubes (CNTs) as freestanding anodes for Li and Na ion batteries (LIBs/NIBs) via a chemical precipitation and subsequent two-step annealing. In this composite, the N-doped carbon coated hollow Co 3 O 4 nanocrystals have a average diameter of 12 nm and are anchored tightly on highly conductive CNT substrates. Such nanocomposite possesses large specific surface area to supply ample active sites, highly conductive carbon networks to enhance electric conductivity, short ion diffusion distance to improve ion transport, and large interior space to accommodate volume expansion during repeatedly electrochemical reaction. Furthermore, kinetic analysis reveal that pseudocapacitive-controlled Li/Na storages plays a vital role. The freestanding composite as a anode for the LIBs exhibits large reversible capacity (1468 mAh g −1 after 130 cycles at 0.2 A g −1 ), superior rate performance (271 mAh g −1 at 12.5 A g −1 ) and good cyclic stability (905 mAh g −1 after 350 cycles at 1.0 A g −1 ). For the NIBs, the freestanding composite delivers attractive rate performance (104 mAh g −1 at 10 A g −1 ) and long cyclic performance (189 mAh g −1 after 400 cycles at 2.0 A g −1 ). Moreover, the assembled Li/Na full cell using the freestanding composite as anodes and LiFePO 4 (for LIBs) and Na 3 V 2 (PO 4 ) 3 (For NIBs) as the cathodes display superior electrochemical performances. Our results suggest the prepared freestanding composite has a highly promising application in high-performance LIBs/NIBs.
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JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Xiaoying Zhang,Fangfei Cai,Funing Ma,Paul Reimus,Linlin Qi,Di Lu,Mohamad Reza Soltanian,Zhenxue Dai
Colloids play a crucial role in influencing the mobility of radionuclides in high-level radioactive waste repositories. However, the co-transport behavior of radionuclides and colloids in geological media remains insufficiently understood. This study investigated the transport of Strontium (Sr) in four types of granite minerals (quartz, biotite , K-feldspar, and plagioclase) in the presence and absence of Na-bentonite colloids (Na-BC) using column experiments. Employing a stepwise modeling strategy, this study first determined the basic flow and transport parameters through breakthrough curve analysis of the conservative tracer (Br). Then, the experimental data of Sr in the colloid-free Sr transport experiments and Na-BC in the Sr-colloid co-transport experiments were quantitatively explained using a two-site sorption model and a two kinetic sites model, respectively. Finally, the co-transport behavior of Sr and Na-BC was fitted using the colloid-facilitated solute transport model. The stepwise modeling allowed quantification of the kinetics of Sr sorption onto mobile and immobile Na-BC and highlighted the role of straining in Na-BC retention. In the absence of Na-BC, Sr transport experienced the greatest retardation in biotite, followed by plagioclase, K-feldspar, and quartz, respectively, which positively correlated with the specific surface area of the minerals. Moreover, Na-BC enhanced Sr transport with the same retardation order in all tested minerals, with recovery rate increments of 68.61%, 19.21%, 6.67%, and 4.33%, respectively. The transport of Sr in K-feldspar was found to be less affected by Na-BC compared to the other tested minerals, likely due to the strong cation exchange capacity of K + among the cation components of minerals, making hydrated K + more likely to exchange with Sr 2+ on K-feldspar surfaces. These findings hold significant implications for assessing the risks associated with the transport of radionuclides in deep geological repositories.
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Energy Storage Materials
·
2023
·
IF 20.4
Lin Li,Jingming Yao,Ruonan Xu,Qiaoquan Lin,Xinlin Yan,Chuang Yu,Long Zhang
The emerging halide solid electrolytes (SEs) possess superior (electro)chemical oxidation stabilities compared to sulfide SEs , but the understanding on their good compatibility toward oxide active materials needs to be further studied. Here, we develop a type of Zr-doped Na 3 YbCl 6 chloride SEs. The optimized composition gains a high ionic conductivity and broad electrochemical oxidation window. The in situ and ex situ analyses verify that the chloride as ionic additive in the cathode is highly compatible with NaCrO 2 . Importantly, it is revealed that the volume change in the cathode can act a position effect on the microstructure evolution . It promotes to form a special core-shell-like structure with homogeneous chloride encapsulating NaCrO 2 grains. Such a soft intimate contact promotes a uniform ion transport and mitigate (electro)chemo-mechanical stresses. The prerequisites generating this specific microstructure are proposed. The main capacity loss of the assembled all-solid-state Na batteries (ASSNBs) only occurs in the initial dozens of cycles, induced by the irreversible O3→O'3 phase transition in NaCrO 2 . The chloride additives with a soft feature and high oxidation-stability allow a high-quality interface in the oxide cathode and an excellent cycling stability of the ASSNBs.
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INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Jingfang Zhou,Pifu Gong,Mingjun Xia,Aimin Ji,Lifang Zhang,Huiqiang Wu,Qian Wu
Replacing alkali metals (K, Na atoms) by an alkaline-earth metal (Ba atom), α-Ba3Sc2(BO3)4 (high-temperature phase) is successfully obtained by a molten salt method, taking Ba2K1.6Na0.4Sc2(BO3)4 as the parent template. Although both of them exhibit similar layered structures composed of ScO6 and BO3 units, α-Ba3Sc2(BO3)4 shows largely distorted ScO6 octahedra (Δd = 0.56) forced by the uniform tension of a larger space effect from BaO12 polyhedrons, rather than regular ScO6 octahedra like in Ba2K1.6Na0.4Sc2(BO3)4. Experimental measurements and calculated analyses elucidate that distorted ScO6 octahedra in α-Ba3Sc2(BO3)4, displaying a second-order Jahn–Teller (SOJT) effect, enlarge the experimental birefringence up to 0.14@550 nm, while Ba2K1.6Na0.4Sc2(BO3)4 with regular ScO6 octahedra only shows Δn = 0.11 under the same condition. In addition, other optical and thermal properties of the two title compounds were characterized. The experimental results indicate that Ba2K1.6Na0.4Sc2(BO3)4 and α-Ba3Sc2(BO3)4 are promising birefringent materials.
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PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Shiping Wang,Rui Huang,Kun Ren,Lushen Shen,Xiang Li,Ganchang Lei,Lijuan Shen,Yingying Zhan,Ying Zheng,Lilong Jiang
Although controlled-release fertilizer (CRF) is a safer and more efficient strategy to administer nutrients for plant growth, it is still a daunting task to reduce the cost and improve the degradability of the synthetic resin coatings. In this paper, an inorganic/organic composite coating for urea fertilizer was prepared from a biodegradable castor oil-based polyurethane (PU) filled with the layered Na-bentonite (Na-BT), which was ultrasonically treated by a series of green PEG surfactants . Synergistically influenced by various intercalation ability, cation-hosting ability and hydrophilicity of the PEGs, the porous structures of the modified Na-BT (MBT) fillers were simply tuned by varying the Mn molecular weights of the PEGs, resulting in the adjustable water swelling and mechanical properties of the MBT/PU composites. Moreover, it was confirmed that the water swelling property played a critical role in controlling the early stage of nutrient release, and the mechanical properties were important for the longevity of nutrient release from the CRFs. The best MBT/PU composite supported a CRF with a long-term release of 75 % in 38 days, which was much longer than the one based on pure PU (20 days).
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REPRODUCTIVE TOXICOLOGY
·
2023
·
IF 3.3
Kaiqi Chen,Xiaoqian Lu,Dan Xu,Yu Guo,Ying Ao,Hui Wang
Corn oil, sodium carboxymethyl cellulose (CMC-Na), and dimethyl sulfoxide (DMSO) are widely used as solvents or suspensions in animal experiments, but the effects of prenatal exposure to them on fetal development have not been reported. In this study, Kunming mice were given a conventional dose of corn oil (9.2 g/kg·d), CMC-Na (0.05 g/kg·d) or DMSO (0.088 g/kg·d) during gestation days 10–18, and the pregnancy outcome, fetal physical development, serum phenotype, and multi-organ function changes were observed. The results showed that corn oil decreased serum triglyceride level in males but increased their serum testosterone and CORT levels, and affected female placenta and female/male multi-organ functions (mainly bone, liver, kidney). CMC-Na increased female/male body lengths and tail lengths, decreased serum glucose and total cholesterol levels in males as well as increased their serum LDL-C/HDL-C ratio and testosterone level, decreased female serum bile acid level, and affected male/female placenta and multi-organ functions (mainly bone, liver, hippocampus). DMSO decreased male body weight and serum glucose level, decreased male/female serum bile acid levels, and affected male/female placenta and multi-organs functions (mainly bone, hippocampus, adrenal gland). In conclusion, prenatal exposure to a conventional dose of corn oil, CMC-Na or DMSO could affect fetal physical development and multi-organ functions, and has the characteristics of "multi-pathway, multi-organ and multi-target". This study provides the experimental basis for the rational selection of solvents or suspensions in pharmacology and toxicology studies.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 26
·期 11
·11170-11178
·
IF 2.914
Sun Kaixuan,Sun Yuanyuan,Gao Bin,Xu Hongxia,Wu Jichun
Retention and transport of sulfonamides (SAs) in subsurface can strongly affect groundwater quality. In this work, a range of laboratory batch sorption and column transport experiments were conducted to determine the effect of cation type in mixed Ca-Na systems on the retention and transport of two typical SAs, sulfadimethoxine (SDM) and sulfacetamide (SCA), in saturated limestone porous media. Column experimental data showed divalent cation Ca 2+ played a more important role than monovalent cation Na + in decreasing the transport of only SDM in co-cation systems in the saturated limestone media. Further, in the single-cation (i.e., including either Ca 2+ or Na + ) system, increasing ionic strength (IS) of either NaCl or CaCl 2 had little effect on SCA transport; however, increasing of IS of CaCl 2 promoted the retention of SDM in the saturated limestone porous media. This is mainly due to the cation bridging effect of Ca 2+ on SDM and limestone. Overall, SDM showed much higher retention in the limestone columns than SCA, which can be attributed to the two SAs’ different physicochemical properties. Moreover, limestone showed stronger ability to retain the two SAs than quartz sand. Findings in this study suggest that cation type and the concentration of certain electrolyte (e.g., CaCl 2 ) as well as medium type play an important role in controlling the environmental fate and transport of antibiotics.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2019
·Vol. 30
·期 5
·4446-4454
·
IF 2.195
Wang Kai-Li,Li Yan,Sun Tao,Mao Fang,Wu Ji-Kui,Xue Bin
Co-doping is a promising approach to change the electronic structure and increase the photocatalytic ability of graphitic carbon nitride (g-C 3 N 4 ). Here, we reported a facile and green fabrication of Na, Cl co-doped g-C 3 N 4 photocatalysts. In the fabrication, sodium and chlorine were incorporated into g-C 3 N 4 synchronously. The bandgap of Na, Cl co-doped g-C 3 N 4 decreased compared with pure g-C 3 N 4 and the position of the valence band moved in the direction of enhanced oxidizing power. The co-doped photocatalysts exhibited the improved visible-light absorption and the reduced recombination rate of photogenerated electrons and holes. As a result, photocatalytic activity of Na, Cl co-doped g-C 3 N 4 was remarkably improved for the photodegradation of rhodamine B and tetracycline hydrochloride under visible light irradiation. The photocatalysis mechanism of Na, Cl co-doped g-C 3 N 4 was also discussed according to the results of active species trapping experiments.
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ORGANIC ELECTRONICS
·
2018
·
IF 3.68
Chuan Wang,Wu Tang,Zeyi Yao,Yongzhen Chen,Jingfang Pei,Cong Fan
Terephthalic acid (H 2 TP) is initially unveiled to be the first example of organic anodes exhibiting the universal Li-ion, Na-ion and K-ion storage capabilities. In Li-ion half cells, H 2 TP can deliver the average capacities of ∼235 mAh g −1 for 500 cycles; In Na-ion half cells, H 2 TP is reported to deliver the average capacities of ∼200 mAh g −1 for 50 cycles; and in K-ion half cells, H 2 TP can exhibit the average capacities of ∼240 mAh g −1 for 150 cycles. At the same time, the chemical structure and crystal structure of H 2 TP could be transformed into its related metal salts on the anode side due to the low reduction potential. This work indicates that organic electrode materials should own the universal metal-ion-storage (e.g., Li + , Na + , K + , etc.) capability for their large void room of organic solid/crystal state.
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ANALYTICAL CHEMISTRY
·
2015
·
IF 5.636
Lu Li,Ping Li,Juan Fang,Qingling Li,Haibin Xiao,Hui Zhou,Bo Tang
Considering the important functions of cellular Na+ and K+ together with their cooperative efforts on various biological processes, it is significant to simultaneously detect Na+ and K+ at a single-cell level. Here, we present a novel method to discriminate and quantify simultaneously Na+ and K+ in single cells using a new near-infrared fluorescent probe associated with microchip electrophoresis. The fluorescent probe selectively responds to both Na+ and K+. The microchip electrophoresis allows accurate single-cell manipulation and effective distinction of Na+ and K+. Based on the method, the concentration of Na+ and K+ in single normal and cancer cells was compared, and the variation of Na+ and K+ in single cancer cells during the early stage of apoptotic volume decrease was monitored, which would help us to better understand the critical roles of Na+ and K+ in malignant cells and apoptosis. This method has paved a new way for the research of the synergistic function of Na+ and K+ in the regulation of various biological processes at a single-cell level.
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