| 1 | 氨浸出混合铜矿石的表征及动力学(英文)显示文摘研究了含8.8%Cu和36.1%Fe的混合铜矿石的氨浸出动力学.矿物学表征表明,该矿石的含铁成分以菱铁矿为主,硫化矿以黄铜矿为主.研究了工艺参数,如搅拌速度、反应温度、氨浓度、矿石粒径、氧分压对氨浸出过程的影响.在标准的浸出条件下,即粒径125~212 μm、反应温度120℃、NH3浓度1.29 mol/L、氧分压202 kPa,在2.5 h内Cu的浸出率达到83%.在使用较高浓度的氨和较小粒径的矿石时,Cu的浸出率能够达到95%.动力学研究结果表明,浸出过程为表面反应控制,估算出的活化能为(37.6±1.9) kJ/mol,氧分压与氨浓度的反应级数分别为0.2和1. | A.A.BABA M.K.GHOSH S.R.PRADHAN D.S.RAO A.BARAL F.A.ADEKOLA | 2014 | Transactions of Nonferrous Metals Society of China2014，24，5： | 7 |
| 2 | A rational preparation strategy of phase tuned MoO_(3) nanostructures for high-performance all-solid asymmetric supercapacitor显示文摘In this work,phase and morphology-tuned MoO_(3) nanostructures are synthesized through a novel modified co-precipitation method,and their electrochemical properties are investigated.For the first time,such a simple surfactant-assisted synthesis process aided by minor temperature variations is reported which results in phase transition of the nanoparticles from h-MoO_(3) nano-rods to a-MoO_(3) nano-flakes.The nanostructures thus developed are highly porous and crystalline with significantly large specific surface area as compared to previous literature.The theoretical bandgap energy of the optimized sample calculated using Perdew-Zunger local density approximation(LDA) is in good agreement with the experimental findings.An overall structural,morphological,and surface-behavioural analysis predicts the electrochemical superiority in 2D a-MoO_(3).The cyclic voltammetry and galvano-potentiometry measurements of 2D a-MoO_(3) in the potential window of-0.6 V to +0.2 V present the highest pseudosupercapacitive response with a maximum specific capacitance of 829 F g^(-1)at 2 A g^(-1)as compared to h-MoO_(3) (452 F g^(-1)) and h@a-MoO_(3) (783 F g^(-1)).Thus,the MoO_(3) 2D nanostructures synthesized through our novel synthesis technique display excellent specific capacitance as compared to previous reported data.Additionally,a-MoO_(3) exhibits a galvanostatic charging-discharging cyclic stability of about 91%after 2000 cycles,indicating that it can serve as an excellent electrode material for supercapacitors.A solid-state asymmetric supercapacitor device is successfully constructed using a-MoO_(3) which can light up 4 red LEDs for 10 s.The specific energy density of the device reaches a maximum value of 36.3 W h kg^(-1)at the power density of 50 W kg^(-1). | M.Kundu D.Mondal I.Mondal A.Baral P.Halder S.Biswas B.K.Paul N.Bose R.Basu S.Das | 2023 | Journal of Energy Chemistry2023，，12： | 0 |
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