CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Lijuan Jia,Xuejin Yang,Kaiqiang Hu,Jiayu Feng,Fang Wang,Kai Li,Xin Sun,Fei Wang,Ping Ning
In this study, we prepared high-performance copper-modified adsorbent (XCu@TiO 2 ) via a simple and low-cost strategy to achieve efficient removal of PH 3 under anaerobic conditions. The effects of copper loading and reaction temperature on the performance of the adsorbent are first investigated, and the experimental results demonstrated that the optimal adsorbent (30Cu@TiO 2 ) had the highest PH 3 breakthrough capacity (135.73 mg(PH 3 )‧g adsorbent -1 ) among all the tested adsorbents. Further characterization analysis confirmed that CuO is the active component of the adsorbent, and the excellent dephosphorization performance is attributed to its abundant alkaline sites, sufficient active oxygen, and developed pore structure. While the consumption of CuO and the accumulation of phosphorus species (H 3 PO 4 , Cu 3 P) on the surface and internal pores of the adsorbent are the main reasons for the deactivation of the adsorbent. Strikingly, the deactivation of the adsorbent converts its active component CuO into the P-type semiconductor Cu 3 P with high added value, implying that the deactivated adsorbent (Cu 3 P/TiO 2 ) is a multifunctional material, and the desulfurization experiments also confirm the reusability of the deactivated adsorbent. Overall, XCu@TiO 2 is a promising and efficient PH 3 adsorbent that can effectively avoid the risk of secondary pollution during the treatment and regeneration of deactivated adsorbents.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Jiayu Feng,Fei Wang,Chi Wang,Kai Li,Xin Sun,Ping Ning
In this study, an NH3 plasma-treated Cu/HZSM-5 sorbent was introduced to simultaneously remove H2S and PH3 in low-temperature and low-oxygen environments. The effects of the Cu loading amounts, modification methods, and plasma-treatment conditions on the adsorption–oxidation performance of the sorbents were investigated. From the performance test results, the sorbent treated by NH3 plasma with the specific energy input (SEI, electrical input energy to the unit volume of gas) value of 1 J·mL–1 (Cu/HZSM-5-[S1]) was identified as having the highest breakthrough capacities of 108.9 mg S·g–1 and 150.9 mg P·g–1 among all of the materials tested. After three times of regeneration, the sorbent can still maintain the ideal performance. The results of Fourier transform infrared (FT-IR) spectroscopy and CO2 temperature-programmed desorption (CO2-TPD) indicated that the NH3 plasma treatment can introduce amino groups (functional groups) onto the sorbent surface, which greatly increases the number and strength of the basic sites on the sorbent surface. Results of N2 adsorption/desorption isotherms and scanning electron microscopy–energy dispersive spectroscopy (SEM–EDS) showed that the morphology of the sorbent changed after the plasma treatment, which exposed more active sites (copper species). In situ IR spectra showed that the amino groups are continuously consumed during the reaction process, indicating that these amino groups can help sorbents to capture gas molecules. Moreover, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses indicated that CuO is the main active species and the consumption of CuO and accumulation of the reaction products on the surface and inner pores of the sorbent are the primary reasons for the deactivation of the sorbent.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Environmental Science-Nano
·
2025
·
IF 5.1
Yihui He,Lin Ye,Wanglai Cen,Jianjun Li,Dengrong Sun
The effective elimination of the highly toxic phosphine (PH3) is crucial for environmental and human health. Nonetheless, developing efficient methods for the removal of PH3 and its conversion into valuable resources remains a significant challenge. Herein, we reported a novel strategy of N doping in Cu-doped active carbon (Cu-AC) to realize efficient PH3 removal. Introduction of N into Cu-AC induces strong interaction between Cu and N, which greatly promotes the dispersion of Cu species and stabilize the active Cu2+ species of PH3 removal due to the electronegativity of N. In addition, doping N also improves the basic intensity and oxidation capability, which provide high benefits for the adsorption and activation of PH3. As a result, the obtained N-doped Cu-AC (Cu-N-AC) shows exceptional performance for the oxidative removal of PH3 to generate H3PO4 at 70 °C, reaching a high breakthrough capacity of 534.5 mg·g-1, which outperforms most of the previously reported catalysts. The Cu-N-AC can be easily regenerated through water washing and air drying, showcasing its great potential for practical applications. This study not only introduces a promising material for PH3 removal, but also offers an innovative approach to design catalysts for efficient PH3 utilization, presenting an important contribution to the field of phosphorus resource recovery.
研究领域:
环境科学
·
催化
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 13
·5822-5828
·
IF 3.591
Yingwu Wang,Qiang Lin,Ping Ning,Chi Wang,Heping Zeng,Xin Sun,Xin Song,Kai Li
H2S and PH3, which are ore-thermal furnace gases, are harmful to humans and the environment. Here, the performance of a catalyst, Ce–Cu–Al trimetallic composite catalyst, is further explored by examining the influence of the used acid. The effects of acids on the structural features, surface functional groups, and activity of the catalysts were examined. Test results showed that the catalyst fabricated using 71.7 mmol nitric acid performed the best, and its capacity reached 229.8 mg g−1 (H2S) and 201.9 mg g−1 (PH3). Besides, SEM and TEM showed that the whole structure of catalysts was sharply changed by the species of the acid used, which was caused by the different combinations of components in the catalyst system. Because of the change in the catalyst structure, their physical and chemical properties are also adjusted. Using nitric acid could endow the catalyst with better properties, such as the best specific surface area, higher total pore volume, the strongest acid center, and the best reducing power. Combining the analysis results of FTIR spectroscopy, it was found that the detailed functional groups of NH2− and νON played a role in the reaction.
研究领域:
催化
·
环境化学
·
材料科学
✓ 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）