以2-甲基咪唑和六水硝酸锌为前驱体制备金属有机骨架ZIF-8,将其溶于甲醇溶液中与硝酸银混合,将其煅烧制得Ag修饰的C掺杂ZnO材料(Ag/C-ZnO)。通过FTIR、XRD、SEM、DRS、XPS和BET等对材料进行结构、组成、形貌和孔径大小等分析。以甲基橙(...以2-甲基咪唑和六水硝酸锌为前驱体制备金属有机骨架ZIF-8,将其溶于甲醇溶液中与硝酸银混合,将其煅烧制得Ag修饰的C掺杂ZnO材料(Ag/C-ZnO)。通过FTIR、XRD、SEM、DRS、XPS和BET等对材料进行结构、组成、形貌和孔径大小等分析。以甲基橙(MO)溶液为降解模型,考察了催化剂的种类和催化剂的用量等因素。结果表明,Ag/C-ZnO催化剂稳定性好,催化活性强;在室温下0.030 g Ag/C-ZnO对50 mL c(MO)=10 mg/L溶液、降解60 min后的降解率为92.5%;且催化过程符合一级动力学模型。展开更多
在异丙醇水溶液中以钛酸丁酯为钛源,MoS2为敏化剂,硅藻土为负载剂,通过溶胶-凝胶法和水热法制备TiO2/MoS2@硅藻土的复合光催化剂。通过傅里叶红外光谱(FT-IR)、X射线衍射(XRD)、漫反射光谱(DRS)、扫描电镜(SEM)和N2吸附-脱附对催化剂组...在异丙醇水溶液中以钛酸丁酯为钛源,MoS2为敏化剂,硅藻土为负载剂,通过溶胶-凝胶法和水热法制备TiO2/MoS2@硅藻土的复合光催化剂。通过傅里叶红外光谱(FT-IR)、X射线衍射(XRD)、漫反射光谱(DRS)、扫描电镜(SEM)和N2吸附-脱附对催化剂组成、形貌及结构进行分析,以亚甲基蓝(MB)为降解有机污染物目标,降解MB溶液前后的浓度比值(ct/c0)为评价指标,对催化剂种类及催化剂的用量进行了优化研究。结果表明,TiO2/MoS2@硅藻土复合催化剂稳定性高,催化活性强,1 mg/mL该复合催化剂降解50 mL 3~10 mg/L的MB溶液,ct/c0值范围为0.015~0.048。降解过程符合一级反应动力学Langmuir-Hinshelwood方程。展开更多
以水热法制备纳米ZnO棒,并将其负载于改性过后的煤气化渣(CGS)上合成ZnO/CGS复合材料。采用FTIR、XRD、SEM、DRS和BET等手段表征其结构、组成、形貌和孔径大小。利用ZnO/CGS复合材料降解亚甲基蓝(MB)溶液,分析了催化剂的种类、ρ(MB)和p...以水热法制备纳米ZnO棒,并将其负载于改性过后的煤气化渣(CGS)上合成ZnO/CGS复合材料。采用FTIR、XRD、SEM、DRS和BET等手段表征其结构、组成、形貌和孔径大小。利用ZnO/CGS复合材料降解亚甲基蓝(MB)溶液,分析了催化剂的种类、ρ(MB)和pH值对催化效果的影响。结果表明,0.1 g ZnO/CGS复合材料对50 mL的ρ(MB)=10 mg/L溶液的降解率为98%。展开更多
以钛酸丁酯为钛源,MoS_(2)为负载剂,通过溶胶-凝胶法和水热法制备TiO_(2)/MoS_(2)复合光催化剂。通过FT-IR、XRD、DRS、SEM、ERS和N_(2)吸附-脱附等对催化剂组成、形貌及结构进行分析,并且以降解率为评价指标通过光催化甲基橙有机污染...以钛酸丁酯为钛源,MoS_(2)为负载剂,通过溶胶-凝胶法和水热法制备TiO_(2)/MoS_(2)复合光催化剂。通过FT-IR、XRD、DRS、SEM、ERS和N_(2)吸附-脱附等对催化剂组成、形貌及结构进行分析,并且以降解率为评价指标通过光催化甲基橙有机污染物来评价其催化活性。对负载量、复合催化剂用量和pH等进行优化研究。研究发现,TiO_(2)/MoS_(2)复合催化剂稳定性高、催化活性强。0.50 g TiO_(2)/MoS_(2)复合催化剂常温矿化降解50 mL的5 mg·L^(-1)甲基橙溶液的降解率达97.53%。此外,复合材料催化降解甲基橙溶液这一过程符合一级反应动力学L-H方程。展开更多
A simple vortex-assisted cloud-point extraction(VA-CPE)method combined with the fluorescence(FL)strategy was developed to extract and determine inorganic Se(IV)in environmental water.Toluene was used as an extraction ...A simple vortex-assisted cloud-point extraction(VA-CPE)method combined with the fluorescence(FL)strategy was developed to extract and determine inorganic Se(IV)in environmental water.Toluene was used as an extraction reagent,and Se(VI)was reduced to Se(IV)by subjecting its solution in 4 mol/L HCl to microwave heating for generating a yellow piazselenol complex using 3,3'-diaminobenzidine(DAB)and Se(IV).The concentration of the complex exhibited an excellent linear relation with the FL at 560 nm with an excitation wavelength of 420 nm.In addition,the effects of the toluene volume,pH,and VA-CPE parameters were investigated and the interference from coexisting ions was also studied.This method was successfully applied to determine the concentration selenium in environmental water samples with a detection limit of 0.05μg/L in the line range from 0.50μg/L to 50.00μg/L.展开更多
文摘以2-甲基咪唑和六水硝酸锌为前驱体制备金属有机骨架ZIF-8,将其溶于甲醇溶液中与硝酸银混合,将其煅烧制得Ag修饰的C掺杂ZnO材料(Ag/C-ZnO)。通过FTIR、XRD、SEM、DRS、XPS和BET等对材料进行结构、组成、形貌和孔径大小等分析。以甲基橙(MO)溶液为降解模型,考察了催化剂的种类和催化剂的用量等因素。结果表明,Ag/C-ZnO催化剂稳定性好,催化活性强;在室温下0.030 g Ag/C-ZnO对50 mL c(MO)=10 mg/L溶液、降解60 min后的降解率为92.5%;且催化过程符合一级动力学模型。
文摘在异丙醇水溶液中以钛酸丁酯为钛源,MoS2为敏化剂,硅藻土为负载剂,通过溶胶-凝胶法和水热法制备TiO2/MoS2@硅藻土的复合光催化剂。通过傅里叶红外光谱(FT-IR)、X射线衍射(XRD)、漫反射光谱(DRS)、扫描电镜(SEM)和N2吸附-脱附对催化剂组成、形貌及结构进行分析,以亚甲基蓝(MB)为降解有机污染物目标,降解MB溶液前后的浓度比值(ct/c0)为评价指标,对催化剂种类及催化剂的用量进行了优化研究。结果表明,TiO2/MoS2@硅藻土复合催化剂稳定性高,催化活性强,1 mg/mL该复合催化剂降解50 mL 3~10 mg/L的MB溶液,ct/c0值范围为0.015~0.048。降解过程符合一级反应动力学Langmuir-Hinshelwood方程。
文摘以水热法制备纳米ZnO棒,并将其负载于改性过后的煤气化渣(CGS)上合成ZnO/CGS复合材料。采用FTIR、XRD、SEM、DRS和BET等手段表征其结构、组成、形貌和孔径大小。利用ZnO/CGS复合材料降解亚甲基蓝(MB)溶液,分析了催化剂的种类、ρ(MB)和pH值对催化效果的影响。结果表明,0.1 g ZnO/CGS复合材料对50 mL的ρ(MB)=10 mg/L溶液的降解率为98%。
文摘以钛酸丁酯为钛源,MoS_(2)为负载剂,通过溶胶-凝胶法和水热法制备TiO_(2)/MoS_(2)复合光催化剂。通过FT-IR、XRD、DRS、SEM、ERS和N_(2)吸附-脱附等对催化剂组成、形貌及结构进行分析,并且以降解率为评价指标通过光催化甲基橙有机污染物来评价其催化活性。对负载量、复合催化剂用量和pH等进行优化研究。研究发现,TiO_(2)/MoS_(2)复合催化剂稳定性高、催化活性强。0.50 g TiO_(2)/MoS_(2)复合催化剂常温矿化降解50 mL的5 mg·L^(-1)甲基橙溶液的降解率达97.53%。此外,复合材料催化降解甲基橙溶液这一过程符合一级反应动力学L-H方程。
基金Scientific Research Staring Foundation for the Returned Overseas Chinese Scholars,Ministry of Education of China(No.[2015] 1098)Cooperation of Production and Research Foundation of Science and Technology Bureau in Yulin,Shaanxi Province,China(No.2016CXY-02)+1 种基金Key Science and Technology of Program of Shaanxi Province,China(No.2017GY-131)Foundation of Yulin University for the Introduction of Talents,China(Nos.14GK23,17GK15)
文摘A simple vortex-assisted cloud-point extraction(VA-CPE)method combined with the fluorescence(FL)strategy was developed to extract and determine inorganic Se(IV)in environmental water.Toluene was used as an extraction reagent,and Se(VI)was reduced to Se(IV)by subjecting its solution in 4 mol/L HCl to microwave heating for generating a yellow piazselenol complex using 3,3'-diaminobenzidine(DAB)and Se(IV).The concentration of the complex exhibited an excellent linear relation with the FL at 560 nm with an excitation wavelength of 420 nm.In addition,the effects of the toluene volume,pH,and VA-CPE parameters were investigated and the interference from coexisting ions was also studied.This method was successfully applied to determine the concentration selenium in environmental water samples with a detection limit of 0.05μg/L in the line range from 0.50μg/L to 50.00μg/L.
