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To promote engineering application of municipal sludge pyrolysis technology and reduce economic cost of sludge pyrolysis operation, the paper discussed the feasibility of sludge-based char application in three aspects: sewage adsorbent, fuel and soil improving agent. Conclusion: the sludge-based char on SCOD adsorption time in the 30min reaches saturation, the SCOD removal rate above 30%; the removal rate of sludge-carbon on A/O reactor effluent COD have less effect, but there are certain effect on nitrogen removal; the sludge-based char can be burned at 400°C, release a lot of heat, it can be used as a low-grade fuel; the sludge-based char can promote plants growth, and has a good safety performance, may be used as a good soil improving agent.

With assistance of copper ions diamond-like carbon (DLC) films were deposited on Cu substrate by liquid-phase electrochemical deposition method from a mixture of ethanol as carbon source and deionized water containing K2CO3 as electrolytic. The electrode process was analyzed and the morphology, composition and structure of the films were studied by scanning electron microscopy (SEM) and Raman spectroscopy respectively. The results show that: on the condition of 40V and 7mm between the electrodes DLC films were deposited by adding K2CO3. With assistance of copper ions the electrode reaction was promoted, the deposition rate was improved. SEM shows that the DLC film deposited with copper ions assisting is comprised of uniformly distributed particles. And the Raman spectrum shows that the G band position moves to lower wavenumber and the ratio ID/IG decreases which indicate that there is more sp3 content in the film.

Two new microporous polyoxomolybdates of (NH4)2[γ-Mo8O26] (Compound I) and (NH4)2[Mo4O13] (Compound II) were synthesized hydrothermally and characterized by elemental analysis, infra-red, TG analysis and single-crystal X-ray diffraction. In the synthesis process, we found that both organic template and transition metal salt play crucial roles in the formation of crystals. Cyclic voltammetry was used to study their electrochemical properties. The results reveal that the two compounds possess electrochemical activity in 0.2M H2SO4+Na2SO4 ( pH=1 ) solution and three multi-electron transferred redox reaction (I-I´, II-II´ and III-III´) processes were obtained. The first two redox reactions (I-I´, II-II´) are reversible reaction processes but another one (III-III´) is not. The electrochemical properties of the two compounds indicate their great potential applications in electroanalysis and electrocatalysis.