JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2023
·Vol. 332
·期 12
·5035-5043
·
IF 1.6
Li Lin,Qian Zhenghua,Zhang Hengrui,Duan Xilei,Liu Xueyang,Zhang Qiang,Qiao Yanbo
The porous compound generated from the reaction of 4-[tris(4-carboxyphenyl)methyl]benzoic acid (H4MTB) with actinide Th in simulated high-level radioactive waste can adsorb Ru, which can separate Th and Ru by more than 68.1 and 37.3%, respectively, in simulated high-level radioactive waste. The waste liquid before and after separation was vitrified with borosilicate glass and iron phosphate glass. The composition and morphology of the glasses were characterized by XRD, SEM and ICP‒OES, and the product consistency test was used to measure the chemical durability of the glasses. The chemical stability and waste loading of the glasses after the separation of actinide and noble metal elements was significantly improved. This work is of great significance for the recovery and utilization of actinide and noble metal elements in high-level radioactive waste and the optimization of the vitrification process of radioactive waste.
研究领域:
核化学
·
放射性废物管理
·
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2021
·Vol. 28
·期 6
·1737-1747
·
IF 2.496
Jiang Haoxi,Zhao Yingying,Lin Jing,Chen Yifei,Wang Sheng
Highly dispersed palladium nanoparticles (NPs) supported on UiO-66 as catalyst for CO 2 methanation were prepared by supercritical fluid deposition (SFD). As a result, the most suitable Pd precursor salt and co-solvent are Na 2 PdCl 4 and ethanol/DMF, respectively. The best SFD process condition to deposit the Pd precursor on UiO-66 is 40 °C, 10 MPa and 2 h. Under the above condition, 4% Pd/UiO-66 exhibits the highest activity with 53% of CO 2 conversion and 95% of CH 4 selectivity while the turnover frequency (TOF) value is 3669.4 h −1 . The catalysts were characterized by XRD, BET, TEM, XPS, TGA, CO-DRIFTS and ICP-OES to investigate the structure–activity relationship. The 4% Pd/UiO-66 with the average size of 2.2 nm of Pd prepared in assistance of supercritical fluid behaved the similar activity as the 6%Pd/UiO-66 with average size of 9.7 nm of Pd prepared by sol–gel method. It is showed prospect of technique for reducing noble metal loading resulting from high dispersion effect.
研究领域:
催化
·
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Xinyi Xing,Xian Shi,Mengya Ruan,Qichun Wei,Ying Guan,Hui Gao,Siquan Xu
Introduction of the sulfonic acid group into H-β zeolite to prepare β-SO 3 H bifunctional catalysts for the efficient synthesis of 5-hydroxymethylfurfural (HMF) from cellulose . Catalysts characterization, such as XRD, ICP-OES, SEM (Mapping), FTIR, XPS , N 2 adsorption-desorption isotherm, NH 3 -TPD, Py-FTIR demonstrate the sulfonic acid group was successfully grafted onto the β zeolite. A superior HMF yield (59.4 %) and cellulose conversion (89.4 %) was obtained in the H 2 O(NaCl)/THF biphasic system under 200 °C for 3 h with β-SO 3 H(3) zeolite as catalyst. More valuable, β-SO 3 H(3) zeolite converts other sugars and obtains ideal HMF yield, including fructose (95.5 %), glucose (86.5 %), sucrose (76.8 %), maltose (71.5 %), cellobiose (67.0 %), starch (68.1 %), glucan (64.4 %) and also converts plant material (25.1 % for moso bamboo and 18.7 % for wheat straw) with great HMF yield. β-SO 3 H(3) zeolite catalyst keeps an appreciable recyclability after 5 cycles. Moreover, in the presence of β-SO 3 H(3) zeolite catalyst, the by-products during the production of HMF from cellulose were detected, and the possible conversion pathway of cellulose to HMF was proposed. The β-SO 3 H bifunctional catalyst has excellent potential for the biorefinery of high value platform compound from carbohydrates.
研究领域:
催化
·
化学工程
·
材料科学
·
生物化学
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
E-POLYMERS
·
2021
·Vol. 21
·期 1
·590-605
·
IF 2.025
Li Zhao,Xianzhi Hu,Futing Zi,Yingmei Liu,Deqiong Hu,Peng Li,Huiling Cheng
In this study, a novel functional monomer N -(1-(2,4-difluorophenyl)-2-(1 H -1,2,4-triazol-1-yl)ethyl)acrylamide (NDTEA) was designed and synthesized, and was used to prepare Ni( ii ) ion-imprinted polymers (Ni( ii )-IIPs). Sixteen kinds of Ni( ii )-IIP (Ni( ii )-IIP 1–16 ) and corresponding non-imprinted polymers (NIP 1–16 ) were prepared by precipitation polymerization method. After optimized condition experiment, Ni( ii )-IIP 5 possessed maximum adsorption capacity and better imprinting factor under optimal experimental conditions which indicated by equilibrium adsorption experiments. The morphology and structural characteristics of Ni( ii )-IIP 5 were characterized by scanning electron microscopy (SEM) and Brunauer–Emmett–Teller (BET). The adsorption selectivity of Ni( ii )-IIP 5 was analyzed by ICP-OES, and the results showed that Ni( ii )-IIP 5 had favorable selectivity recognition ability for Ni( ii ) when Cu( ii ), Co( ii ), and Cd( ii ) are used as competitive ions. The kinetic experiment indicated that the performance of Ni( ii ) adsorption on the surface of Ni( ii )-IIP 5 obeyed the pseudo-first-order model, and adsorption equilibrium was attained after 15 min. Isothermal adsorption process fitted to Langmuir and Freundlich isothermal adsorption models, simultaneously. The results showed that Ni( ii )-IIP 5 prepared by using a new functional monomer had better permeation selectivity and higher affinity for Ni( ii ), which also verified the rationality of the functional monomer design. At the same time, it also provided a broad application prospect for removal of Ni( ii ) in complex samples.
研究领域:
高分子科学
·
环境化学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Functional Foods
·
2016
·
IF 3.973
Jing-Yu He,Yuan-He Zhang,Na Ma,Xu-Lin Zhang,Meng-Hua Liu,Wei-Ming Fu
The functional and potential bioactive ingredients, including the elements, amino acids and phytochemicals, in Rosa roxburghii (RR) and R. sterilis (RS) fruits were analysed by ICP-OES and -MS, HPLC-UV, and LC-MS/MS, respectively, and were compared to elucidate the characteristics of their ingredients. The antioxidant activities of the ethanolic extracts of RR and RS fruits were evaluated using four different methods, including 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity, hydroxyl radical scavenging activity, inhibition of β -carotene bleaching, and ferric reducing antioxidant power assays; the correlation between the ingredients and their antioxidant activities was assessed. Furthermore, principal component analysis was selected to differentiate between the intra- and interspecies variation of RR and RS fruits. The results showed that RR and RS fruits contained numerous nutritious and biological ingredients and exhibited antioxidant activities, but there were significant differences among the fruits. Nevertheless, RR and RS fruits are attractive materials to produce highly valuable, functional foods.
研究领域:
植物学
·
药理学
·
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）