Hydrogen Selective SiCH Inorganic-Organic Hybrid/γ-Al2O3 Composite Membranes.

Solar hydrogen production via the photoelectrochemical water-splitting reaction is attractive as one of the environmental-friendly approaches for producing H2. Since the reaction simultaneously generates H2 and O2, this method requires immediate H2 recovery from the syngas including O2 under high-humidity conditions around 50 °C. In this study, a supported mesoporous γ-Al2O3 membrane was modified with allyl-hydrido-polycarbosilane as a preceramic polymer and subsequently heat-treated in Ar to deliver a ternary SiCH organic-inorganic hybrid/γ-Al2O3 composite membrane. Relations between the polymer/hybrid conversion temperature, hydrophobicity, and H2 affinity of the polymer-derived SiCH hybrids were studied to functionalize the composite membranes as H2-selective under saturated water vapor partial pressure at 50 °C. As a result, the composite membranes synthesized at temperatures as low as 300-500 °C showed a H2 permeance of 1.0-4.3 × 10-7 mol m-2 s-1 Pa-1 with a H2/N2 selectivity of 6.0-11.3 under a mixed H2-N2 (2:1) feed gas flow. Further modification by the 120 °C-melt impregnation of low molecular weight polycarbosilane successfully improved the H2-permselectivity of the 500 °C-synthesized composite membrane by maintaining the H2 permeance combined with improved H2/N2 selectivity as 3.5 × 10-7 mol m-2 s-1 Pa-1 with 36. These results revealed a great potential of the polymer-derived SiCH hybrids as novel hydrophobic membranes for purification of solar hydrogen.

Smoking behavior and patient education practices of oncology nurses in six countries.

Worldwide, tobacco is the leading cause of preventable death, resulting in approximately 5 million deaths annually. Nurses are keenly positioned to work toward reducing tobacco-related illness and deaths. Therefore, guided by the health belief model, the purpose of this study was to explore the smoking behavior, beliefs, smoking cessation education practices, and existing smoking policies at the institutions of a sample of practicing oncology nurses in Canada, Japan, Korea, Taiwan, United Kingdom, and the United States. A 27-item structured survey, designed for this study in English and translated and reverse translated by the Asian countries, was distributed to a convenience sample of nurses attending oncology meetings in each country. Totally 759 surveys were completed and analyzed using descriptive statistics. Principle findings indicate that 4.5% of these nurses currently smoke, although 23.3% reported smoking previously. While many nurses (74%) reported frequently assessing the smoking status of patients, only 50% reported discussing cessation with their patients that smoke. Although the majority (80%) reported feeling comfortable with asking their patients about smoking, only 23% felt it was the nurse's role. The findings indicate that while internationally oncology nurses recognize the importance of smoking cessation, significant room for improvement exists in translating this into practice.