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Environmentally Benign Oxidation of Some Organic Sulfides with 34% Hydrogen Peroxide Catalyzed by Simple Heteropolyoxometalates 被引量:1
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作者 TAYEBEE, Reza ALIZADEH, Mohammad Hassan 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2007年第9期1340-1343,共4页
An environmentally benign oxygenation protocol was developed for selective oxidation of some types of aromatic and aliphatic sulfides in good to excellent yields utilizing 34% hydrogen peroxide catalyzed by simple het... An environmentally benign oxygenation protocol was developed for selective oxidation of some types of aromatic and aliphatic sulfides in good to excellent yields utilizing 34% hydrogen peroxide catalyzed by simple heteropolyoxometalates in normal drinking water at room temperature. The catalysts could be recovered and reused for at least seven reaction cycles under the described reaction conditions without considerable loss of reactivity. This procedure introduced a new insight into the use of simple heteropolyanions as recoverable catalysts for the oxidation of organic sulfides by an environmentally acceptable protocol. Keywords 展开更多
关键词 OXIDATION HETEROPOLYACID CATALYSIS hydrogen peroxide organic sulfide
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Improving gold recovery of Pb–Zn sulfide ore by selective activation with organic acid 被引量:3
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作者 Dai-Xiong Chen Jun Xiao 《Rare Metals》 SCIE EI CAS CSCD 2016年第2期198-203,共6页
Free gold and gold wrapped in sulfides are considered as the object of gold floatation. However,floatation of free gold exhibits more variables in practice.In this study, improving gold recovery of a Pb-Zn sulfide ore... Free gold and gold wrapped in sulfides are considered as the object of gold floatation. However,floatation of free gold exhibits more variables in practice.In this study, improving gold recovery of a Pb-Zn sulfide ore from Yunnan Province, China, was investigated. The results show that free gold and auriferous sulfides account for 94.99 % of total gold. Without adding organic acid in floatation, only 82 % recovery of gold could be obtained.Gold recovery in Au/Pb concentrates increases by 9.29 %with oxalate added and by 7.35 % with citric acid added,respectively, while performances of lead and arsenic nearly keep a constant. A possible reason is that free gold is of wonderful selectivity against pyrite with organic activators.A new method to enhance gold recovery is proposed. 展开更多
关键词 Gold Improving recovery Pb-Zn sulfide ore Selective activation organic acid
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Hollow Co_9S_8 from metal organic framework supported on rGO as electrode material for highly stable supercapacitors 被引量:3
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作者 Peng Wang Chunyang Li +3 位作者 Weigang Wang Jing Wang Yusong Zhu Yuping Wu 《Chinese Chemical Letters》 SCIE CAS CSCD 2018年第4期612-615,共4页
Metal sulfides as a feasible candidate with high specific capacitance for supercapacitors suffer from sluggish ion/electron transport kinetics and rapid capacitance fading. Herein, we demonstrate a method to fabricate... Metal sulfides as a feasible candidate with high specific capacitance for supercapacitors suffer from sluggish ion/electron transport kinetics and rapid capacitance fading. Herein, we demonstrate a method to fabricate a composite of reduced graphene oxide(rGO) with hollow Co9S8 derived from metal organic framework(MOF). Due to the combined highly conductive rGO substrates and hollow shell, the prepared r GO/Co9S8 composite exhibits a high specific capacitance of 575.9 F/g at 2 A/g and 92.0% capacitance retention after 9000 cycles. Its excellent electrochemical performance provides great promise for application, and this versatile method can be extended to prepare other similar nanocomposite. 展开更多
关键词 Cobalt sulfides Metal organic framework Reduced graphene oxides Supercapacitors Energy storage
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