Preparation Of Carbon Carrier Composite Materials For Research In Dealing With Sulfide In Aqueous Solution

CeO2-NiAl-layered double hydroxide/chelate activate carbon composite (CeO2-NiAl-LDHs/MFT/AC) was prepared using a urea hydrolysis method with chelated activate carbon as the substrate, which was characterized by fourier transform infrared spectrum (FT-IR), X-ray diffraction (XRD), filed emission scanning electron microscope (FE-SEM) and electrochemical methods. The results indicated CeO2-NiAl-LDHs was uniformly distributed on the surface of AC. with a petal-like structure. Besides, the adsorption behaviors of SO32- and S2- were investigated at CeO2-NiAl-LDHs/MFT/AC, respectively. Their adsorption processes were spontaneous and endothermic, which could be described by pseudo second-order kinetics equation and Langmuir equation. In present results, the maximum adsorption capacities (qm) were 483.09 mg/g for SO32- and 181.15 mg/g for S2- at room temperature. Meanwhile, the electrochemical removals of aqueous sulfur dioxide and hydrogen sulfide were respectively investigated at MWCNTs/CeO2-NiAl-LDHs/MFT/AC/WGE. Both SO32- and S2- could be effectively oxidized to SO42- in aqueous.CeO2-NiAl-layered double hydroxide/graphene oxide (CeO2-NiAl-LDHs/GO) composite was prepared using a urea hydrolysis method, which was characterized by FT-IR, XRD, FE-SEM and electrochemical methods. The results indicated CeO2-NiAl-LDHs/GO composite has formed with a lamellar structure. CeO2-NiAl-LDHs/GO modified homed paraffin-impregnated electrode was prepared for sulphide sensing in aqueous solution. The result demonstrated that the oxidation peak currents depending on the concentrations showed a good linear growth relationship in the range of 1×10-6～13×10-6 mol/L for SO32- and 1×10-6～ 15×10-6 mol/L for S2-, with the limits of 7×10-8 mol/L and 2×10-7 mol/L (3σ), respectively.